Document and Entity Information - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Jan. 31, 2018 |
Jun. 30, 2017 |
|
| Entity Registrant Name | HORNBECK OFFSHORE SERVICES INC /LA | ||
| Entity Central Index Key | 0001131227 | ||
| Current Fiscal Year End Date | --12-31 | ||
| Entity Filer Category | Accelerated Filer | ||
| Document Type | 10-K | ||
| Document Period End Date | Dec. 31, 2017 | ||
| Document Fiscal Year Focus | 2017 | ||
| Document Fiscal Period Focus | FY | ||
| Trading Symbol | HOS | ||
| Amendment Flag | false | ||
| Entity Common Stock, Shares Outstanding | 37,147,663 | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Public Float | $ 97,502,624 |
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- Definition If the value is true, then the document is an amendment to previously-filed/accepted document. No definition available.
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- Definition End date of current fiscal year in the format --MM-DD. No definition available.
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- Definition This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY. No definition available.
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- Definition This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006. No definition available.
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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. No definition available.
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- Definition The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word "Other". No definition available.
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- Definition A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument. No definition available.
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- Definition Indicate "Yes" or "No" whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure. No definition available.
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- Definition Indicate whether the registrant is one of the following: (1) Large Accelerated Filer, (2) Accelerated Filer, (3) Non-accelerated Filer, (4) Smaller Reporting Company (Non-accelerated) or (5) Smaller Reporting Accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure. No definition available.
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- Definition State aggregate market value of voting and non-voting common equity held by non-affiliates computed by reference to price at which the common equity was last sold, or average bid and asked price of such common equity, as of the last business day of registrant's most recently completed second fiscal quarter. The public float should be reported on the cover page of the registrants form 10K. No definition available.
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- Definition The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Indicate "Yes" or "No" if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. No definition available.
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- Definition Indicate "Yes" or "No" if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A. No definition available.
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- Definition Trading symbol of an instrument as listed on an exchange. No definition available.
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- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Sum of the carrying amounts of deferred costs that are expected to be recognized as a charge against earnings in periods after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of current assets classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of noncurrent assets classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Accounts receivable, allowance for doubtful accounts | $ 6,054 | $ 2,120 |
| Long-term debt, original issue discount | 7,862 | 31,093 |
| Debt Issuance Costs, Net | $ 10,134 | $ 10,197 |
| Preferred stock, par value | $ 0.01 | $ 0.01 |
| Preferred stock, shares authorized | 5,000,000 | 5,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Preferred stock, shares outstanding | 0 | 0 |
| Common stock, par value | $ 0.01 | $ 0.01 |
| Common Stock, Shares Authorized | 100,000,000 | 100,000,000 |
| Common stock, shares issued | 37,144,000 | 36,467,000 |
| Common stock, shares outstanding | 37,144,000 | 36,467,000 |
| First-Lien Credit Facility Maturing Twenty Twenty Three [Member] [Domain] | ||
| Deferred Gain | $ 18,911 | $ 0 |
| Long-term debt, original issue discount | 1,228 | |
| Debt Issuance Costs, Net | $ 3,445 |
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- Definition Amount, after accumulated amortization, of deferred gain that resulted from a debt exchange. No definition available.
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after accumulated amortization, of debt discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
||||
| Vessel revenues | $ 158,466 | $ 190,436 | $ 446,382 | |||
| Non-vessel revenues | 32,946 | 33,863 | 29,688 | |||
| Revenues | 191,412 | 224,299 | 476,070 | |||
| Costs and expenses: | ||||||
| Operating expenses | 120,537 | 131,658 | 219,260 | |||
| Depreciation | 98,733 | 93,071 | 82,566 | |||
| Amortization | 13,168 | 20,485 | 26,463 | |||
| General and administrative expenses | 47,597 | 43,358 | 48,297 | |||
| Costs and Expenses, Total | 280,035 | 288,572 | 376,586 | |||
| Gain (loss) on sale of assets | (121) | 54 | 44,060 | |||
| Operating income (loss) | (88,744) | (64,219) | 143,544 | |||
| Gain on early extinguishment of debt | 15,478 | 0 | 0 | |||
| Other income (expense): | ||||||
| Interest income | 2,203 | 1,490 | 1,525 | |||
| Interest expense | (51,364) | (48,675) | (39,496) | |||
| Other income (expense), net | (396) | 2,052 | 1,005 | |||
| Nonoperating Income (Expense) | (34,079) | (45,133) | (36,966) | |||
| Income (Loss) before Income Taxes | (122,823) | (109,352) | 106,578 | |||
| Income tax expense (benefit) | (150,244) | (45,506) | 39,757 | |||
| Net income (loss) | $ 27,421 | $ (63,846) | $ 66,821 | [1] | ||
| Basic earnings (loss) per common share | $ 0.74 | $ (1.76) | $ 1.87 | |||
| Diluted earnings (loss) per common share | $ 0.73 | $ (1.76) | $ 1.84 | |||
| Weighted average basic shares outstanding | 36,858 | 36,248 | 35,755 | |||
| Weighted average diluted shares outstanding | 37,664 | 36,248 | 36,302 | |||
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- Definition The amount of amortization of deferred charges applied against earnings during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total costs of sales and operating expenses for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No definition available.
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| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
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| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after sales adjustments, returns, allowances, and discounts, of revenue classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
[1],[2] | Sep. 30, 2017 |
[1],[2] | Jun. 30, 2017 |
[1],[2] | Mar. 31, 2017 |
[1],[2] | Dec. 31, 2016 |
[2] | Sep. 30, 2016 |
[2] | Jun. 30, 2016 |
[2] | Mar. 31, 2016 |
[2] | Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
||||||||
| Net Income (loss) | $ 93,758 | $ (18,950) | $ (19,489) | $ (27,898) | $ (19,243) | $ (16,503) | $ (20,586) | $ (7,514) | $ 27,421 | $ (63,846) | $ 66,821 | [3] | ||||||||||||||
| Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax | (1,568) | 14,321 | (3,174) | |||||||||||||||||||||||
| Other comprehensive income: | ||||||||||||||||||||||||||
| Total comprehensive income (loss) | $ 25,853 | $ (49,525) | $ 63,647 | |||||||||||||||||||||||
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| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP). No definition available.
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| X | ||||||||||
- Definition Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. No definition available.
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Number of shares issued which are neither cancelled nor held in the treasury. No definition available.
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| X | ||||||||||
- Definition Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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| X | ||||||||||
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| X | ||||||||||
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| X | ||||||||||
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Consolidated Statements of Cash Flow Statement $ in Thousands |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
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| Statement of Cash Flows [Abstract] | ||||||
| Net Income (loss) | $ 27,421 | $ (63,846) | $ 66,821 | [1] | ||
| Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities: | ||||||
| Depreciation | 98,733 | 93,071 | 82,566 | |||
| Amortization | 13,168 | 20,485 | 26,463 | |||
| Stock-based compensation expense | 6,999 | 9,983 | 10,293 | |||
| Gain on early extinguishment of debt | 15,478 | 0 | 0 | |||
| Provision for bad debts | 3,934 | (757) | (816) | |||
| Deferred tax expense (benefit) | (141,525) | (45,958) | 34,086 | |||
| Amortization of deferred financing costs | 8,119 | 11,371 | 9,675 | |||
| (Gain) loss on sale of assets | (121) | 54 | 44,060 | |||
| Changes in operating assets and liabilities: | ||||||
| Accounts receivable | 8,525 | (58,322) | (39,743) | |||
| Other current and long-term assets | (2,106) | 2,272 | (8,472) | |||
| Deferred drydocking charges | 8,063 | 3,978 | 13,267 | |||
| Accounts payable | 9,405 | (10,901) | (10,486) | |||
| Accrued liabilities and other liabilities | (11,044) | (11,935) | 7,700 | |||
| Accrued interest | (29) | (31) | (95) | |||
| Net cash provided by (used in) operating activities | (14,658) | 53,500 | 217,095 | |||
| CASH FLOWS FROM INVESTING ACTIVITIES: | ||||||
| Costs incurred for OSV newbuild program 5 | 18,104 | 76,277 | 190,070 | |||
| Net proceeds from sale of assets | 43 | 524 | 152,000 | |||
| Vessel capital expenditures | 1,687 | 20,689 | 86,792 | |||
| Non-vessel capital expenditures | 1,552 | 569 | 16,487 | |||
| Net cash used in investing activities | (21,300) | (97,011) | (141,349) | |||
| CASH FLOWS FROM FINANCING ACTIVITIES: | ||||||
| Proceeds from first-lien credit facility | 66,640 | 0 | 0 | |||
| Repurchase of senior notes | 5,057 | 0 | 0 | |||
| Repurchase of convertible notes | 49,631 | 0 | 0 | |||
| Deferred financing costs | 5,636 | 1,102 | 2,089 | |||
| Shares withheld for payment of employee withholding taxes | 575 | 450 | 1,252 | |||
| Shares withheld for payment of employee withholding taxes | 485 | 1,300 | 3,112 | |||
| Net cash provided by (used in) financing activities | 6,226 | (252) | (229) | |||
| Effects of exchange rate changes on cash | (446) | 989 | (839) | |||
| Net increase (decrease) in cash and cash equivalents | (30,178) | (42,774) | 74,678 | |||
| Cash and Cash Equivalents, at Carrying Value | 186,849 | 217,027 | 259,801 | |||
| SUPPLEMENTAL DISCLOSURES OF CASH FLOW ACTIVITIES: | ||||||
| Interest Paid | 52,194 | 50,152 | 50,492 | |||
| Proceeds from Income Tax Refunds | 9,042 | |||||
| Income Taxes Paid | 3,732 | 4,808 | ||||
| SUPPLEMENTAL DISCLOSURES OF NON-CASH FINANCING ACTIVITIES: | ||||||
| Exchange of convertible notes for first-lien term loan | $ 127,096 | $ 0 | $ 0 | |||
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| X | ||||||||||
- Definition Costs Incurred For Offshore Supply Vessels Newbuild Program. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amount of amortization of deferred charges applied against earnings during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of amortization expense attributable to debt issuance costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in accrued expenses, and obligations classified as other. No definition available.
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the value of expenditures made during the current reporting period for benefits that will be received over a period of years. Deferred charges differ from prepaid expenses in that they usually extend over a long period of time and may or may not be regularly recurring costs of operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in operating assets classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of cash paid for interest. Includes, but is not limited to, payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The value of notes retired (or transferred to another entity) in noncash investing or financing transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash outflow for loan and debt issuance costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of cash outflow from the acquisition of or improvements to long-lived, physical assets used to produce goods and services and not intended for resale, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The amount of cash received during the period as refunds for the overpayment of taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of cash inflow from issuance of shares under share-based compensation arrangement. Issuance includes, but is not limited to, exercise of stock options and similar instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- References No definition available.
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Organization |
12 Months Ended |
|---|---|
Dec. 31, 2017 | |
| Text Block [Abstract] | |
| Nature of Operations | Organization Nature of Operations Hornbeck Offshore Services, Inc., or the Company, was incorporated in the state of Delaware in 1997. The Company, through its subsidiaries, operates offshore supply vessels, or OSVs, multi-purpose support vessels, or MPSVs, and a shore-base facility to provide logistics support and specialty services to the offshore oil and gas exploration and production industry, primarily in the U.S. Gulf of Mexico, or GoM, Latin America and select international markets, as well as specialty services for the U.S. military. All significant intercompany accounts and transactions have been eliminated. |
| X | ||||||||||
- Definition The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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Summary of Significant Accounting Policies |
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| Significant Accounting Policies | Summary of Significant Accounting Policies Revenue Recognition The Company charters its OSVs and MPSVs to clients under time charters based on a daily rate of hire and recognizes revenue as earned on a daily basis during the contract period of the specific vessel. Deferred revenue represents payments received from customers or billings submitted to customers in advance of providing vessel access through time charters or other contracted arrangements. Revenue, including lessor accounting Commencing January 1, 2018, the Company's revenues will be classified into three general categories - time charters, vessel management services and shore-base services. For its vessel time charters, the Company will either recognize (i) operating lease revenue as a lessor in accordance with ASC 842 "Leases" or (ii) service revenue in accordance with ASC 606 "Revenue with Contracts with Customers" when its charter agreements do not contain a lease, based on the daily rate of hire. Revenue recognition commences when the vessel is made available to a customer and is earned on a daily basis during the contract period (or lease period) of the specific vessel. Revenues related to the Company’s vessel management services and shore-base services will be recognized under ASC 606. The Company’s revenue recognition policies are not materially impacted by the adoption of these standards as neither the amount nor timing of the revenue to be recognized is substantially changed by the new standards. Accordingly, the Company will not be required to record a transition adjustment for revenue as a result of adoption. However, the Company’s classification of revenue and disclosures will be expanded. Cash and Cash Equivalents Cash and cash equivalents consist of all highly liquid investments in money market funds, deposits and investments available for current use with an initial maturity of three months or less. Accounts Receivable Accounts receivable consists of trade receivables, net of reserves and amounts to be rebilled to customers. Property, Plant and Equipment Property, plant and equipment is recorded at cost. Depreciation and amortization of equipment and leasehold improvements are computed using the straight-line method based on the estimated useful lives of the related assets. Major modifications and improvements, which extend the useful life of the vessel, are capitalized and amortized over the remaining useful life of the vessel. Gains and losses from retirements or other dispositions are recognized as incurred. Salvage values for new generation marine equipment are estimated to be 25% of the originally recorded cost. The estimated useful lives by classification are as follows:
See “Considerations Regarding Impairment of Long-Lived Assets” below for more information. Lessee accounting The Company currently accounts for operating leases under ASC 840, recognizing lease expense ratably over the term of the arrangement. Under ASC 842, the Company will be required to measure and record a right-of-use asset and corresponding lease liability on its balance sheet using the present value of the future payments under its operating lease commitments. The estimated impact of the adoption of this ASC as of January 1, 2018, will be an increase to assets and liabilities on the Company's financial statements to reflect the right of use assets and lease obligations in a range from $27.0 million to $30.0 million. The adoption of the new standard is not expected to result in a change in the amount of lease expense currently being recognized. Deferred Charges The Company’s vessels are required by regulation to be recertified after certain periods of time. The Company defers the drydocking expenditures incurred due to regulatory marine inspections and amortizes the costs on a straight-line basis over the period to be benefited from such expenditures (generally 30 months). Financing charges are amortized over the term of the related debt. Deferred charges also include prepaid lease expenses related to the Company’s shore-base port facility. Such prepaid lease expenses are being amortized on a straight-line basis over the effective remaining term of the lease. Mobilization Costs The Company incurs mobilization costs to transit its vessels to and from certain regions and/or for long-term contracts. These costs, which are typically expensed as incurred, include, but are not limited to, fuel, crew wages, vessel modification and pre-positioning expenses, materials and supplies and importation taxes. Income Taxes Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using currently enacted tax rates. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The provision for income taxes includes provisions for federal, state and foreign income taxes. Interest and penalties relating to uncertain tax positions are recorded as general and administrative expenses. In addition, the Company provides a valuation allowance for deferred tax assets if it is more likely than not that such items will either expire before the Company is able to realize the benefit or the future deductibility is uncertain. As of December 31, 2017, the Company determined it is more likely than not that a portion of deferred tax assets may not be utilized prior to their expiration and therefore has established a valuation allowance of $33.1 million. Use of Estimates The preparation of financial statements in conformity with United States generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Legal Liabilities In the ordinary course of business, the Company may become party to lawsuits, administrative proceedings, or governmental investigations. These matters may involve large or unspecified damages or penalties that may be sought from the Company and may require years to resolve. The Company records a liability related to a loss contingency to such legal matters in accrued liabilities if the Company determines the loss to be both probable and estimable. The liability is recorded for an amount that is management’s best estimate of the loss, or when a best estimate cannot be made, the minimum loss amount of a range of possible outcomes. Significant judgment is required in estimating such liabilities, the results of which can vary significantly from the actual outcomes of lawsuits, administrative proceedings or governmental investigations. Concentration of Credit Risk Customers are primarily major and independent, domestic and international, oil and oil service companies, as well as national oil companies and the U.S. military. The Company’s customers are granted credit on a short-term basis and related credit risks are considered minimal. The Company usually does not require collateral. The Company provides an estimate for uncollectible accounts based primarily on management’s judgment using the relative age of customer balances, historical losses, current economic conditions and individual evaluations of each customer to make adjustments to the allowance for doubtful accounts. The following table represents the allowance for doubtful accounts (in thousands):
Foreign Currency Transaction Gains and Losses Foreign currency transaction gains and losses are recorded in the period incurred except for advances to and investments in foreign subsidiaries. Foreign currency gains and losses related to advances to or investments in foreign operations are accounted for as a foreign currency translation adjustment and recorded as other comprehensive income. Foreign currency transaction adjustments for fiscal years 2017, 2016 and 2015 were not material to the financial statements. The balance in accumulated other comprehensive income as of December 31, 2017 relates primarily to the Company’s long term investments in its foreign subsidiaries. Considerations Regarding Impairment of Long-Lived Assets In accordance with ASC 360, the Company periodically reviews long-lived asset valuations when events or changes in circumstances indicate that an asset's carrying value might not be recoverable. If indicators of impairment exist, the Company assesses the recoverability of its long-lived assets by comparing the projected future undiscounted cash flows associated with the related long-lived asset group over their remaining estimated useful lives. If the sum of the estimated undiscounted cash flows is less than the carrying amounts of the asset group, the assets would be written down to their estimated fair values based on the expected discounted future cash flows or appraised values attributable to the assets. The future cash flows are subjective and are based on the Company's current assumptions regarding future dayrates, utilization, operating expense, G&A expense and recertification costs that could differ from actual results. During the second quarter of 2016, the Company determined that it observed indicators of impairment related to its vessels. This resulted from the rapid deterioration of its second quarter 2016 operating results, as well as the uncertainty regarding future market conditions and the related impact on the Company's projected operating results. For the purposes of calculating the undiscounted cash flows, the Company groups its vessels into two groups, OSVs and MPSVs, and used a probability-weighted undiscounted cash flow projection to test for recoverability. After reviewing the results of this calculation, the Company determined that each of its asset groups has sufficient projected undiscounted cash flows to recover the remaining book value of the Company's long-lived assets within such group. While the Company has not observed any new impairment indicators since 2016, the Company has reviewed and updated, as necessary, the assumptions used in determining its undiscounted cash flow projections for each asset group to reflect current market conditions. After reviewing the result of the updated projections, as part of its 2017 close, the Company determined that each of its asset groups has sufficient projected undiscounted cash flows to recover the remaining book value of the Company's long-lived assets within such groupings. Recent Accounting Pronouncements The following table provides a brief description of recent accounting pronouncements that could have a material effect on the Company's financial statements:
ASC 842, Leases ASC 842 was released in February 2016 to increase transparency and comparability among organizations by recognizing all leases on the balance sheet and disclosing key information about leasing arrangements. The main difference between current accounting standards and ASC 842 is the recognition of assets and liabilities by lessees for those leases classified as operating leases under current accounting standards. The effective date of the new standard is January 1, 2019, however, the Company will elect to early adopt the standard effective January 1, 2018. The Company will adopt the standard using the modified retrospective method. In February 2018, the FASB proposed two practical expedients in regard to the new leases standard:
The Company plans to adopt the new leases standard utilizing both of the proposed practical expedients, which it expects to be finalized by the FASB prior to the release of its first quarter 2018 financial statements. However, if the FASB does not incorporate this guidance into the accounting standards, the Company may be required to modify its disclosures and/or classification of its time charter revenues. The Company does not expect there to be a material difference in either the amount or timing of how time charter revenue is expected to be recorded using the practical expedients. |
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- Definition The entire disclosure for all significant accounting policies of the reporting entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Earnings (Loss) Per Share |
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| Earnings Per Share [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings (Loss) Per Share | Earnings (Loss) Per Share Basic earnings (loss) per common share was calculated by dividing net income (loss) by the weighted average number of common shares outstanding during the period. Diluted earnings (loss) per common share was calculated by dividing net income (loss) by the weighted average number of common shares outstanding during the year plus the effect of dilutive stock options and restricted stock unit awards. Weighted average number of common shares outstanding was calculated by using the sum of the shares determined on a daily basis divided by the number of days in the period. The table below reconciles the Company’s earnings per share (in thousands, except for per share data):
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- References No definition available.
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- Definition The entire disclosure for earnings per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Defined Contribution Plan |
12 Months Ended |
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Dec. 31, 2017 | |
| Defined Contribution Plan | Defined Contribution Plan The Company offers a 401(k) plan to all full-time employees. Employees must be at least eighteen years of age and have completed three months of service to be eligible for participation. Participants may elect to defer up to 60% of their compensation, subject to certain statutorily established limits. The Company may elect to make annual matching and profit sharing contributions to the 401(k) plan. In response to weak market conditions, the Company temporarily ceased matching contributions to the 401(k) plan and has not matched any contributions subsequent to December 31, 2014. |
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- Definition The entire disclosure of an entity's employee compensation and benefit plans, excluding share-based compensation and including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, life insurance, severance, health care, unemployment and other benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Property, Plant and Equipment |
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| Property, Plant and Equipment | Property, Plant and Equipment Property, plant and equipment consisted of the following (in thousands):
In November 2011, the Company commenced, and later expanded, its fifth OSV newbuild program. This program consisted of vessel construction contracts with three domestic shipyards to build four 300 class OSVs, five 310 class OSVs, ten 320 class OSVs, three 310 class MPSVs and two 400 class MSPVs. As of December 31, 2017, the Company had placed in service 22 vessels under this newbuild program. The remaining two vessels are expected to be delivered in 2019. Based on current contracts and internal estimates, the aggregate total cost of this program, before construction period interest, is expected to be approximately $1,335.0 million. From the inception of this program through December 31, 2017, the Company has incurred $1,272.7 million, or 95.3%, of total expected project costs. During 2015, the Company closed on the sale of four 250EDF class OSVs, the HOS Arrowhead, the HOS Black Powder, the HOS Eagleview and the HOS Westwind, which were previously chartered to the U.S. Navy, for cash consideration of $152.0 million. The sale resulted in a pre-tax gain of approximately $44.1 million ($27.6 million after-tax or $0.76 per diluted share). These vessels are now managed by the Company for the U.S. Navy. |
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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Long-Term Debt |
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| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-Term Debt | Long-Term Debt As of the dates indicated below, the Company had the following outstanding long-term debt (in thousands):
The table below summarizes the Company's cash interest payments (in thousands):
(1) The interest rate on the first-lien credit facility is variable based on the Company's election. The amount reflected in this table is the monthly amount payable based on the 30-day LIBOR interest rate that was elected and in effect on December 31, 2017. Please see further discussion of the variable interest rate below. Annual maturities of debt, excluding the potential effects of conditions discussed in Convertible Senior Notes, during each year ending December 31, are as follows (in thousands):
First-Lien Credit Facility On June 15, 2017, the Company closed on a new $300 million first-lien delayed-draw term loan credit facility by and among the Company, as Parent Borrower, Hornbeck Offshore Services, LLC, or HOS, as Co-Borrower, certain holders of the Company’s then outstanding notes, or the Initial Lenders, and Wilmington Trust, National Association, as Administrative Agent and Collateral Agent for the lenders, or the New Credit Facility. The Company concurrently terminated its then-existing $200 million senior secured revolving credit facility, dated February 6, 2015 as subsequently amended, or the Old Credit Facility. The New Credit Facility is guaranteed by the Company’s significant domestic subsidiaries other than HOS. The six-year term of the New Credit Facility extended the February 2020 maturity that was applicable under the Old Credit Facility to June 2023. The New Credit Facility enhanced the Company’s financial flexibility by (i) increasing liquidity from the then-applicable borrowing base of $75.0 million under the Old Credit Facility, (ii) extending the maturity date that existed under the Old Credit Facility by over three years, and (iii) eliminating all of the existing financial ratio maintenance covenants and the anti-cash hoarding provision of the Old Credit Facility. The New Credit Facility contains customary representations and warranties, covenants and events of default. The Company can use the amounts it draws under the New Credit Facility for working capital and general corporate purposes, including the acquisition of distressed assets and/or the refinancing of existing debt, subject to, among other things, compliance with certain covenants requiring the Company to maintain access to liquidity (cash and credit availability) of $25.0 million at all times. The minimum liquidity level required for prepayment of the Company’s existing indebtedness and/or certain other restricted payments is $65.0 million. As required by the New Credit Facility, the Company drew $67.0 million on December 29, 2017. The Company is required to draw on a cumulative basis (i) at least $136.0 million of the delayed-draw commitments under the New Credit Facility by December 31, 2018, and (ii) the full amount of the maximum $204.7 million by September 1, 2019. The right to borrow any amount of the delayed-draw commitments not drawn by the respective minimum funding dates will be terminated. The New Credit Facility is collateralized by 51 domestic high-spec OSVs and MPSVs, including a security interest in two pending MPSV newbuilds, and associated personalty, as well as by certain deposit and securities accounts, or the Collateral. Subject to the foregoing and certain limitations, the Company’s other assets that do not arise from, are not required for use in connection with, and are not necessary for, the operation of mortgaged vessels are unencumbered by liens, including ten low-spec domestic OSVs and eleven foreign-flagged vessels. Borrowings under the New Credit Facility accrue interest, at the Company’s option, at either:
The Company also has the option, exercisable anytime or from time-to-time during the six-year term of the loan, of paying interest on the New Credit Facility “in-kind” (accruing to the outstanding principal of the loan, or PIK Interest), subject to a 100 basis-point step-up in interest rate and a minimum 3% cash-pay coupon for so long as the Company elects to pay PIK Interest, subject to any and all debt incurrence and permitted lien restrictions then in effect under any outstanding loan agreements or bond indentures as of the time of such increase in principal. The New Credit Facility may be prepaid at (i) 102% of the principal amount repaid if such repayment occurs on or prior to June 15, 2018, (ii) at 101% of the principal amount repaid if such repayment occurs after June 15, 2018 but on or prior to June 15, 2019, and (iii) at par of the principal repaid thereafter. Upon closing the New Credit Facility, $95.3 million of borrowings under such facility were exchanged for $127.1 million in face value of its 2019 convertible senior notes. In accordance with applicable accounting guidance, this debt-for-debt exchange has been accounted for as a debt modification, requiring the Company to defer the $31.8 million gain. Such gain was reduced by $11.1 million of original issue discount that was associated with the 2019 convertible senior notes that were exchanged. The net credit of $20.7 million has been deferred and will be amortized prospectively as a yield adjustment to interest expense over the life of the New Credit Facility. The agreement governing the New Credit Facility and the indentures governing the Company's 2020 senior notes and 2021 senior notes impose certain restrictions on the Company. Such restrictions affect, and in many cases limit or prohibit, among other things, the Company's ability to incur additional indebtedness, make capital expenditures, redeem equity, create liens, sell assets and make dividend or other restricted payments. Convertible Note and Senior Note Repurchases Concurrently with the closing of the New Credit Facility, the Company arranged for the repurchase of $73.3 million of its outstanding 2019 convertible senior notes and $8.1 million of its outstanding 2020 senior notes for an aggregate total of $54.1 million of cash. The Company recorded a gain on early extinguishment of debt of $15.5 million ($10.5 million or $0.29 per diluted share after-tax), which was comprised of a $27.2 million gain on the repurchase of the 2019 convertible senior notes and the 2020 senior notes, offset in part by the write-off of $2.3 million in deal costs and unamortized financing costs related to the credit facilities and $9.4 million of original issue discount, deal costs and unamortized financing costs related to the notes repurchased. 2020 Senior Notes On March 2, 2012, the Company issued $375.0 million in aggregate principal amount of 2020 senior notes, governed by an indenture, or the 2012 indenture. The net proceeds to the Company from the offering were approximately $367.4 million, net of transaction costs. The Company used $259.9 million of such proceeds on March 16, 2012 to repurchase approximately 84% of its outstanding 2014 senior notes pursuant to its tender offer for such notes. The Company used $49.5 million of proceeds on April 30, 2012 to redeem the remaining 16% of the outstanding 2014 senior notes. The repurchase and redemption of the 2014 senior notes resulted in a loss on early extinguishment of debt of approximately $6.0 million in 2012. The remaining proceeds were used for general corporate purposes, including the construction of vessels under the Company's fifth OSV newbuild program. The 2020 senior notes mature on April 1, 2020 and the effective interest rate is 6.08%. No principal payments are due until maturity. Pursuant to a registered exchange offer, the 2020 senior notes issued in March 2012 that were initially sold pursuant to a private placement were exchanged by the holders for 2020 senior notes with substantially the same terms, except that the issuance of the 2020 senior notes in the exchange offer was registered under the Securities Act. The original 2020 senior notes and the similar notes exchanged were issued under and are entitled to the benefits of the same 2012 indenture. Concurrently with the closing of the New Credit Facility, the Company arranged for the repurchase of $8.1 million of its outstanding 2020 senior notes. See Convertible Note and Senior Note Repurchases above for further discussion of such note repurchases. 2021 Senior Notes On March 14, 2013, the Company issued $450.0 million in aggregate principal amount of 2021 senior notes, governed by an indenture, or the 2013 indenture. The net proceeds to the Company from the offering were approximately $442.4 million, net of transaction costs. The Company used $252.7 million of such proceeds to repurchase approximately 94% of the outstanding 2017 senior notes pursuant to its tender offer for such notes. The Company used approximately $16.6 million of proceeds on May 13, 2013 to redeem the remaining 6% of the outstanding 2017 senior notes. The repurchase and redemption of the 2017 senior notes resulted in a loss on early extinguishment of debt of approximately $25.8 million in 2013. The remaining proceeds have been available for general corporate purposes, including funding for the acquisition, construction or retrofit of vessels. The 2021 senior notes mature on March 1, 2021 and the effective interest rate is 5.21%. No principal payments are due until maturity. Pursuant to a registered exchange offer, the 2021 senior notes issued in March 2013 that were initially sold pursuant to a private placement were exchanged by the holders for 2021 senior notes with substantially the same terms, except that the issuance of the 2021 senior notes in the exchange offer was registered under the Securities Act. The original 2021 senior notes and the similar notes exchanged were issued under and are entitled to the benefits of the same 2013 indenture. The 2020 senior notes and 2021 senior notes are senior unsecured obligations and rank equally in right of payment with other existing and future senior indebtedness and senior in right of payment to any subordinated indebtedness that may be incurred by the Company in the future. Hornbeck Offshore Services, Inc., as the parent company issuer of the 2020 senior notes and the 2021 senior notes, has no independent assets or operations other than its ownership interest in its subsidiaries and affiliates. There are no significant restrictions on the Company’s ability, or the ability of any guarantor, to obtain funds from its subsidiaries by such means as a dividend or loan. The Company may, at its option, redeem all or part of the 2020 senior notes or 2021 senior notes from time to time at specified redemption prices and subject to certain conditions required by the indentures. The Company is permitted under the terms of the indentures to incur additional indebtedness in the future, provided that certain financial conditions set forth in the indentures are satisfied by the Company. 2019 Convertible Senior Notes On August 13, 2012, the Company issued $300.0 million of 2019 convertible senior notes, which mature on September 1, 2019. Because the 2019 convertible senior notes are considered to be cash convertible debt, the Company has separately accounted for the liability and equity components of the 2019 convertible senior notes by allocating the $300.0 million in proceeds from the issuance between the liability component and the embedded conversion option, or the equity component. The allocation was conducted by estimating an interest rate at the time of issuance of the 2019 convertible senior notes for similar debt instruments that do not include an embedded conversion feature. A non-convertible interest rate of 5.75% was used to compute the initial fair value of the liability component of $227.6 million. For purposes of the fair value measurement, the Company determined that the valuation of the 2019 convertible senior notes falls under Level 2 of the fair value hierarchy. The excess of the $300.0 million of proceeds from the issuance of the 2019 convertible senior notes over the $227.6 million initial amount allocated to the liability component, or $72.4 million, was allocated to the embedded conversion option, or equity component. This excess was treated as an imputed original issue discount and is being amortized through interest expense, using the effective interest method, over the seven-year term of the 2019 convertible senior notes, which runs through September 1, 2019. The effective interest rate for these notes is 6.23%. The initial conversion rate of the 2019 convertible senior notes is 18.5718 shares per $1,000 principal amount of notes, which equates to a conversion price of approximately $53.85 per share. The conversion rate was based on the last reported sale price of the Company’s common shares on the New York Stock Exchange of $39.16 on August 7, 2012. The conversion rate will be subject to adjustment in some events but will not be adjusted for accrued interest. In addition, following certain corporate transactions that constitute “fundamental changes” (as defined in the indenture for the 2019 convertible senior notes), the conversion rate will be increased for holders who elect to convert notes in connection with such corporate transactions in certain circumstances. The 2019 convertible senior notes are convertible based on the applicable conversion rate only under the following circumstances:
Upon conversion, the Company will satisfy its conversion obligation by paying or delivering, as the case may be, cash, shares of common stock or a combination of cash and shares of common stock, at the Company’s election. If the holders of the 2019 convertible senior notes exercise the conversion provisions of the 2019 convertible senior notes and the Company elects to settle such conversions partially in cash (which it presently intends to do at least up to the principal amount of the notes), the Company will need to remit such cash amount to the converting holders. For that reason, in any period during which the 2019 convertible senior notes are convertible as provided above, the Company would classify the entire principal amount of the outstanding 2019 convertible senior notes as a current liability in the respective quarter. This evaluation of the classification of amounts outstanding associated with the 2019 convertible senior notes will occur every calendar quarter. The 2019 convertible senior notes are not redeemable at the option of the Company prior to their maturity. No sinking fund is provided for the 2019 convertible senior notes and the 2019 convertible senior notes are not subject to legal defeasance. If the Company experiences specified types of corporate transactions, including certain change of control events or a de-listing of the Company’s common stock, holders of the 2019 convertible senior notes may require the Company to purchase all or a portion of their 2019 convertible senior notes. Any repurchase of the convertible senior notes pursuant to these provisions will be for cash at a price equal to 100% of the principal amount of the notes to be purchased plus any accrued and unpaid interest to, but excluding, the purchase date. In connection with the sale of the 2019 convertible senior notes, the Company entered into convertible senior note hedge transactions with respect to its common stock with affiliates of the initial purchasers of the notes, Barclays, Inc., JP Morgan Chase and Wells Fargo Bank, or the counterparties. Each of the 2019 convertible senior note hedge transactions is a privately-negotiated transaction that is economically equivalent to the purchase of call options on the Company’s common stock with strike prices equal to the conversion price of the 2019 convertible senior notes, and is intended to mitigate dilution to the Company’s stockholders and/or offset cash payment due upon the potential future conversion of the 2019 convertible senior notes. Under the 2019 convertible senior note hedge transactions, subject to customary anti-dilution provisions, the counterparties are required to deliver to the Company the approximate number of shares of the Company’s common stock and/or an amount of cash that the Company is obligated to deliver to the holders of the 2019 convertible senior notes assuming the conversion of such notes. The Company also entered into separate privately-negotiated warrant transactions, whereby the Company sold to each of the counterparties call options to acquire approximately the same number of shares of its common stock underlying the convertible senior note hedge transactions, subject to customary anti-dilution adjustments, at a strike price of $68.53 per share of common stock, which represented a 75.0% premium over the closing price of the Company’s shares of common stock on August 7, 2012. Upon the exercise of the warrants, if the market price of the common stock exceeds the strike price of the warrants on any day within the valuation period, the Company will be required to deliver the corresponding value to the counterparties, at its option in cash or shares of its common stock. The 2019 convertible senior note hedge and warrant transactions are separate and legally distinct instruments that bind the Company and the counterparties and have no binding effect on the holders of the 2019 convertible senior notes. For income tax reporting purposes, the Company has elected to integrate the 2019 convertible senior notes and the note hedge transactions. Integration of the 2019 convertible senior note hedge with the 2019 convertible senior notes creates an in-substance original issue debt discount for income tax reporting purposes and, therefore, the cost of the 2019 convertible senior note hedge is accounted for as interest expense over the term of the 2019 convertible senior notes for income tax reporting purposes. The associated income tax deductions will be recognized in the period that the deduction is taken for income tax reporting purposes. The Company has also treated the proceeds from the sale of warrants as a non-taxable increase in additional paid-in capital in stockholders’ equity. The Company used a portion of the $290.8 million in net proceeds of the 2019 convertible senior notes offering, along with a portion of the $48.2 million in proceeds from the sale of warrants, to fund the $73.0 million cost of convertible senior note hedge transactions. The Company used a portion of the remaining net proceeds of approximately $266.0 million from the sale of the 2019 convertible senior notes and the sale of the warrants to retire its 2026 convertible senior notes, which were converted or redeemed by the Company in November 2013. The Company incurred $9.3 million of fees and other costs related to the issuance of the 2019 convertible senior notes. These fees and other origination costs have been allocated to the liability and equity components of the 2019 convertible senior notes in proportion to their allocated values. Approximately $2.2 million of these fees and other origination costs were recorded as a reduction in additional paid-in capital. The remaining $7.1 million of fees and other costs are being amortized as interest expense over the seven-year term of the 2019 convertible senior notes, which runs through September 1, 2019. Concurrently with the closing of the New Credit Facility, the Company entered into a debt-for-debt exchange for $127.1 million in face value of its 2019 convertible notes and arranged for the repurchase of $73.3 million in additional face value of its outstanding 2019 convertible senior notes. See Convertible Note and Senior Note Repurchases above for further discussion of such note exchange and repurchases. Hornbeck Offshore Services, Inc., as the parent company issuer of the 2019 convertible senior notes, has no independent assets or operations other than its ownership interest in its subsidiaries and affiliates. There are no significant restrictions on the Company’s ability or the ability of any guarantor to obtain funds from its subsidiaries by such means as a dividend or loan. The 2019 convertible senior notes are general unsecured, senior obligations of the Company, ranking equally in right of payment with all of its existing and future senior indebtedness, including its 2020 and 2021 senior notes. The 2019 convertible senior notes, the 2020 senior notes and the 2021 senior notes are guaranteed by certain of the Company’s subsidiaries and the guarantees are full and unconditional, joint and several. See Note 15 for further information. Old Credit Facility On June 15, 2017, the Company terminated its then-existing $200.0 million senior secured revolving credit facility dated February 6, 2015 as subsequently amended, or the Old Credit Facility. This facility generally provided standby liquidity for working capital and general corporate purposes, including acquisitions, newbuild and conversion programs and other capital expenditures. Based on the Company's results for the then-trailing four quarters, including the first quarter of 2017, the Company had designated the interest coverage holiday permitted by the Old Credit Facility to commence, effective April 27, 2017, for the four-quarter period ending December 31, 2017, unless rescinded sooner. This designation capped the borrowing base at $75.0 million during the period of the holiday and the LIBOR spreads for funded borrowings were increased by an additional 50 basis points during and after the holiday. Unused commitment fees were payable quarterly at the annual rate of 50.0 basis points of the unused portion of the $200.0 million borrowing base of the revolving credit facility based on the defined total debt-to capitalization ratio. The reduced borrowing base, as a result of the interest coverage holiday, did not affect the calculation of these unused commitment fees. The remaining covenants within the revolving credit facility remained in effect during the interest coverage holiday. The Company estimates the fair value of its 2020 senior notes, 2021 senior notes, 2019 convertible senior notes and New Credit Facility by primarily using quoted market prices. Given the observable nature of the inputs to these estimates, the fair values presented below for long-term debt have been assigned a Level 2, of the three-level valuation hierarchy. As of the dates indicated below, the Company had the following face values, carrying values and fair values (in thousands):
Capitalized Interest Interest expense excludes capitalized interest related to the construction or conversion of vessels in the approximate amount of $10.2 million, $16.7 million, and $24.7 million, for the years ended December 31, 2017, 2016, and 2015, respectively. |
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- References No definition available.
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- Definition The entire disclosure for long-term debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Stockholders' Equity |
12 Months Ended |
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Dec. 31, 2017 | |
| Equity [Abstract] | |
| Stockholders' Equity | Stockholders’ Equity Preferred Stock The Company’s certificate of incorporation authorizes 5.0 million shares of preferred stock. The Board of Directors has the authority to issue preferred stock in one or more series and to fix the rights, preferences, privileges and restrictions thereof, including dividend rights, conversion rights, voting rights, terms of redemption, redemption prices, liquidation preferences and the number of shares constituting any series or the designation of such series, without further vote or action by the Company’s stockholders. Stockholder Rights Plan On July 1, 2013, the Company’s Board of Directors implemented a stockholder rights plan establishing one right for each outstanding share of common stock. The rights become exercisable, and transferable apart from the Company’s common stock, 10 business days following a public announcement that a person or group has acquired beneficial ownership of, or has commenced a tender or exchange offer for, 10% or more of the Company’s common stock. This stockholder rights plan is substantially similar to the Company's prior stockholder rights plan that expired on June 17, 2013. |
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- References No definition available.
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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Stock-Based Compensation |
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| Stock-Based Compensation | Stock-Based Compensation Incentive Compensation Plan The Company’s stock-based incentive compensation plan covers a maximum of 4.95 million shares of common stock that allows the Company to grant restricted stock awards, restricted stock unit awards, or collectively restricted stock, stock options, stock appreciation rights and fully-vested common stock to officers, other employees and directors. As of December 31, 2017, there were 67,286 shares available for future issuance to employees under the incentive compensation plan. The issuance of shares of common stock under the incentive compensation plan has been registered on Form S-8 with the Securities and Exchange Commission. The financial impact of stock-based compensation expense related to the Company’s incentive compensation plan on its operating results are reflected in the table below (in thousands, except for per share data):
The Company adopted ASU No. 2016-09 on January 1, 2017. The adoption of this ASU had the following impact on its consolidated financial statements. The Company recorded a $3.2 million adjustment to equity to recognize the cumulative effect of unrecorded excess tax deductions related to stock-based compensation expense from prior years. The prior-period presentation has not been restated. Upon adoption, the Company recorded $1.9 million of tax shortfall in its provision for income taxes for the year ended December 31, 2017, rather than as a decrease to equity. The Company did not restate prior-period presentation. The Company recorded $0.6 million related to employee withholding taxes paid as a financing activity in the twelve months ended December 31, 2017. The statement of cash flows was restated to reflect $0.5 million and $1.3 million related to employee taxes paid for the years ended December 31, 2016 and 2015, respectively. There was no impact on the calculation of earnings per share as all outstanding stock options were anti-dilutive at December 31, 2017. In addition, the Company has elected to continue estimating the forfeitures expected to occur to determine the amount of compensation cost to be recognized in each period. Prior to the adoption of ASU 2016-09, the accounting rules required the benefits of tax deductions in excess of recognized compensation expense to be reported as financing cash flows, rather than as operating cash flows. The Company recorded the impact on cash flows from operating activities for tax shortfalls of approximately $1.9 million and $0.6 million for the years ended December 31, 2016 and 2015, respectively. Net cash proceeds from the exercise of stock options were $0.0 million, $0.0 million and $0.1 million for the years ended December 31, 2017, 2016 and 2015, respectively. The income tax benefit from stock option exercises and restricted stock vesting was $1.9 million and $0.6 million for the years ended December 31, 2016 and 2015, respectively. Stock Options The Company is authorized to grant stock options under its incentive compensation plan in which the purchase price of the stock subject to each option is established as the closing price on the New York Stock Exchange of the Company’s common stock on the date of grant and accordingly is not less than the fair market value of the stock on the date of grant. All options granted expire ten years after the date of grant, have an exercise price equal to or greater than the actual or estimated market price of the Company’s stock on the date of grant and vest over a three-year period. The Company has not granted stock options to any directors, executive officers or employees since 2011. The following table represents the Company’s stock option activity for the year ended December 31, 2017 (in thousands, except per share data and years):
The following table represents the Company’s stock option activity for the year ended December 31, 2016 (in thousands, except per share data and years):
The following table represents the Company’s stock option activity for the year ended December 31, 2015 (in thousands, except per share data and years):
Restricted Stock Equity-Settled Restricted Stock The Company’s incentive compensation plan allows the Company to issue restricted stock units, with either performance-based or time-based vesting provisions. The Company has granted performance-based restricted stock unit awards, which calculates the shares to be received based on the Company’s achievement of certain internal performance criteria over a three-year period as defined by the restricted stock unit agreement governing such awards. Performance for these types of awards has historically been measured by a number of factors that may differ from year to year, including such examples as the Company achieving a targeted return on invested capital, operating profit margin compared to peers, and safety record. The actual number of shares that could be received by the award recipients for the years in question can range from 0% to 150% of the Company’s base share awards depending on the number and/or extent of performance goals attained by the Company. Compensation expense related to performance-based restricted stock unit awards is recognized over the period the restrictions lapse, from one to three years, based on the market price of the Company's stock on the date of grant applied to the shares that are expected to vest. The compensation expense related to time-based restricted stock unit awards, which is amortized over a one to three-year vesting period, is determined based on the market price of the Company’s stock on the date of grant applied to the total shares that are expected to fully vest. As of December 31, 2017, the Company had unamortized stock-based compensation expense of $2.5 million, which will be recognized on a straight-line basis over the remaining vesting period, or 1.2 years. In addition, the Company has recorded approximately $5.8 million, $6.8 million and $9.3 million of compensation expense during the years ended December 31, 2017, 2016 and 2015, respectively, associated with restricted stock-based unit awards. The following table summarizes the equity-settled restricted stock unit awards activity during the year ended December 31, 2017 (in thousands, except per share data):
The following table summarizes the equity-settled restricted stock unit awards activity during the year ended December 31, 2016 (in thousands, except per share data):
The following table summarizes the equity-settled restricted stock unit awards activity during the year ended December 31, 2015 (in thousands, except per share data):
Cash-Settled Restricted Stock The Company’s incentive compensation plan allows the Company to issue restricted stock units with cash-settled vesting provisions. The compensation expense related to cash-settled restricted stock unit awards is amortized over a vesting period of up to three years, as applicable, and is determined based on the market price of the Company’s stock on the date of grant applied to the total shares that are expected to fully vest. The cash-settled restricted stock units are re-measured quarterly based on the period-end market price of the Company's common stock and are classified as a liability, due to the settlement of these awards in cash. As of December 31, 2017, the Company had unamortized cash-settled restricted stock compensation expense of $3.0 million, which will be recognized on a straight-line basis over the remaining vesting period, or 1.6 years. In addition, the Company recorded approximately $0.9 million, $2.6 million, and $(0.2) million of compensation expense during the years ended December 31, 2017, 2016 and 2015, respectively, associated with cash-settled restricted stock unit awards. The following table summarizes the cash-settled restricted stock unit awards activity during the year ended December 31, 2017 (in thousands, except per share data):
The following table summarizes the cash-settled restricted stock unit awards activity during the year ended December 31, 2016 (in thousands, except per share data):
The following table summarizes the cash-settled restricted stock unit awards activity during the year ended December 31, 2015 (in thousands, except per share data):
Employee Stock Purchase Plan On May 3, 2005, the Company established the Hornbeck Offshore Services, Inc. 2005 Employee Stock Purchase Plan, or ESPP, which was adopted by the Company’s Board of Directors and approved by the Company’s stockholders. Under the ESPP, the Company is presently authorized to issue up to 2.2 million shares of common stock to eligible employees of the Company and its designated subsidiaries. Employees have the opportunity to purchase shares of the Company’s common stock at semi-annual intervals through accumulated payroll deductions that will be applied to purchase shares of common stock at a discount from the market price as defined by the ESPP. The ESPP is designed to satisfy the requirements of Section 423 of the Internal Revenue Code of 1986, as amended, and thereby allows participating employees to defer recognition of taxes when purchasing the shares of common stock at a 15% discount under the ESPP. The Company has an effective Registration Statement on Form S-8 with the Commission registering the issuance of shares of common stock under the ESPP. As of December 31, 2017, there were 0.9 million shares available for future issuance to employees under the ESPP. The Company recorded approximately $0.2 million, $0.6 million, and $1.2 million of compensation expense during the years ended December 31, 2017, 2016 and 2015, respectively, associated with the ESPP. The fair value of the employees’ stock purchase rights granted under the ESPP was estimated using the Black-Scholes model with the following assumptions for the years ended December 31, 2017 and 2016:
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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Income Taxes |
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| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Taxes | Income Taxes The net long-term deferred tax liabilities in the accompanying consolidated balance sheets include the following components (in thousands):
The components of the income tax expense follow (in thousands):
Income from operations before income taxes, based on jurisdiction earned, was as follows (in thousands):
At December 31, 2017, the Company has net operating loss carryforwards, or NOLs, in the U.S. of approximately $465.1 million, which if not utilized will expire in 2031 through 2037, and foreign tax credits of approximately $18.5 million, which if not utilized will expire in 2019 through 2027. It has state NOLs of approximately $132.2 million, which if not utilized will expire in 2030 through 2037. The Company also has NOLs in Brazil of approximately $37.8 million, which are not subject to expiration and can only be used to offset up to 30% of taxable income each year. Lastly, it has NOLs in Mexico of approximately $14.5 million, which if not utilized will expire in 2026 through 2027. All of the above NOLs can only be utilized if the Company generates taxable income in the respective tax jurisdiction. In recording a valuation allowance with respect to such NOLs and foreign tax credits, management assessed the favorable and unfavorable evidence to estimate whether sufficient future taxable income will be generated to permit use of the existing deferred tax assets. A significant piece of the unfavorable evidence evaluated during the fourth quarter of 2017 was the cumulative pre-tax loss that was incurred over the three-year period ended December 31, 2017. Such objective evidence limits the ability to consider other subjective evidence, such as the Company’s projections of future earnings. As of December 31, 2016 and 2017, the Company has established valuation allowances of $2.3 million and $35.4 million, respectively, based upon management's conclusion that it is more likely than not that the Brazil and Mexico NOLs and foreign tax credits described above may expire unused. The Company is no longer subject to tax audits by federal, state or local taxing authorities for years prior to 2013. The Company has ongoing examinations by various foreign tax authorities but does not believe that the results of these examinations will have a material adverse effect on the Company’s financial position or results of operations. The following table reconciles the difference between the Company’s income tax provision calculated at the federal statutory rate of 35% and the actual income tax provision (in thousands):
Due to a favorable election included in the Company's 2015 tax return, which was filed during the fourth quarter of 2016, the results of one of the Company's vessels was excluded from U.S. taxable income and was taxed based on its daily notional shipping income, as defined. This resulted in a deferred tax benefit of $9.5 million during the year ended December 31, 2016. The Company does not anticipate having any vessels qualify for this election in the foreseeable future. The Tax Cuts and Jobs Act, or the Act, was signed into law in the U.S. on December 22, 2017. The primary impact of this legislation was a reduction of the corporate income tax rate from 35% to 21% generally effective as of January 1, 2018. The impact of the deferred tax rate and tax law changes are required to be reflected in the period in which the law is enacted. As a result, the Company repriced its net deferred tax liabilities, which resulted in a favorable tax impact of $125.2 million and was recorded as a discrete item during the fourth quarter of 2017. On December 22, 2017, the Securities and Exchange Commission issued Staff Accounting Bulletin 118, or SAB 118, to address the accounting and reporting of the Act. SAB 118 allows companies to take a reasonable period, which should not extend beyond one year from enactment of the Act, to measure and recognize the effects of the new tax law. As of December 31, 2017, the Company remeasured its deferred tax assets and liabilities based on the tax rates at which they are expected to reverse in the future, which is generally a 22.5% blended federal and state tax rate. However, it is still analyzing certain aspects of the Act and refining its calculations, which could potentially affect the measurement of these balances or potentially give rise to new deferred tax amounts. The Company has included in its income tax rate a preliminary estimate related to executive compensation, Alternative Minimum Tax refundable credits, taxation in its foreign jurisdictions, and re-measurement of its deferred taxes. Once the accounting for income taxes on these items is complete, it will be reflected and reported in the applicable quarter during 2018. Additionally, because of the complexities of the new legislation, the Company has not elected an accounting policy at this time with respect to the newly enacted global intangible low-taxed income, or GILTI, provisions. An accounting election to either treat GILTI as part of deferred taxes or a period cost will be made once further analysis and interpretation of the tax legislation is complete. |
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- References No definition available.
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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Commitments and Contingencies |
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| Commitments and Contingencies | Commitments and Contingencies Vessel Construction In November 2011, the Company commenced, and later expanded, its fifth OSV newbuild program. This program consisted of vessel construction contracts with three domestic shipyards to build four 300 class OSVs, five 310 class OSVs, ten 320 class OSVs, three 310 class MPSVs and two 400 class MPSVs. As of December 31, 2017, the Company had placed in service 22 vessels under such program. The two remaining vessels under this 24-vessel domestic newbuild program are currently expected to be placed in service during 2019. Based on current contracts and internal estimates, the aggregate total cost of this program, before construction period interest, is expected to be approximately $1,335.0 million. From the inception of this program through December 31, 2017, the Company had incurred construction costs of approximately $1,272.7 million, or 95.3%, of total expected project costs. Operating Leases The Company is obligated under certain operating leases for office space and shore-base facilities. The Covington facility lease provides for an initial term expiring in September 2025 with three additional five-year renewal period options. The Company leases two adjacent shore-base facilities in Port Fourchon. At December 31, 2017, the leases had approximately one year remaining on their existing terms and the Company has multiple renewal options on such facilities. Rent expense related to operating leases was approximately $3.9 million, $4.0 million and $4.1 million for the years ending December 31, 2017, 2016 and 2015, respectively. Future minimum payments under noncancelable leases for years subsequent to 2017 are as follows (in thousands):
Contingencies In the normal course of its business, the Company becomes involved in various claims and legal proceedings in which monetary damages are sought. It is management’s opinion that the Company’s liability, if any, under such claims or proceedings would not materially affect the Company's financial position or results of operations. The Company insures against losses relating to its vessels, pollution and third party liabilities, including claims by employees under Section 33 of the Merchant Marine Act of 1920, or the Jones Act. Third party liabilities and pollution claims that relate to vessel operations are covered by the Company’s entry in a mutual protection and indemnity association, or P&I Club, as well as by marine liability policies in excess of the P&I Club’s coverage. The Company provides reserves for any individual claim deductibles for which the Company remains responsible by using an estimation process that considers Company-specific and industry data, as well as management’s experience, assumptions and consultation with outside counsel. As additional information becomes available, the Company will assess the potential liability related to its pending claims and revise its estimates. Although historically revisions to such estimates have not been material, changes in estimates of the potential liability could materially impact the Company’s results of operations, financial position or cash flows. During 2013, the Company commenced the process of assigning the in-country vessel management services for its four vessels operating in Brazil from a third party provider to a wholly-owned subsidiary of the Company. As a result, this assignment has been interpreted by local authorities as a new importation of these vessels resulting in an importation assessment. The Company disagreed with this interpretation. During the third quarter of 2015, the Brazilian court ruled in the Company's favor related to these claims and this decision was appealed by local authorities to another court. During the third quarter of 2017, the Brazilian court made a final ruling in the Company's favor relating to the importation of three of the vessels. As of December 31, 2017, no decision has been made on the fourth vessel which could result in an assessment ranging from $0.5 million to $1.0 million. While the Company cannot estimate the amounts or timing of the resolution of this matter, the Company believes that the outcome will not have a material impact on its liquidity or financial position. During 2012, a customer, ATP Oil and Gas, Inc., initiated a reorganization proceeding under Chapter 11 of the United States Bankruptcy Code, which in June 2014 was converted to a Chapter 7 case. The Company believes its receivables from ATP of $4.8 million are secured under the Louisiana Oil Well Lien Act. A legal challenge related to the Company's liens has been raised in the bankruptcy proceedings by parties whose interests are affected by the liens. The Company pursued this claim in Bankruptcy Court and during the first quarter of 2017 a district court judge ruled the Company's claim is not secured. That ruling has been appealed by the Company. As a result of such ruling, the Company increased its reserve related to this receivable to $4.8 million. |
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- Definition The entire disclosure for commitments and contingencies. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Deferred Charges |
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| Deferred Charges | Deferred Charges Deferred charges include the following (in thousands):
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- Definition Deferred Charges Disclosure No definition available.
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Other Accrued Liabilities (Notes) |
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| Accrued Liabilities, Current [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Liabilities Disclosure [Text Block] | Other Accrued Liabilities Other accrued liabilities include the following (in thousands):
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- References No definition available.
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- Definition The entire disclosure for other liabilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Major Customers |
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| Major Customers | Major Customers In the years ended December 31, 2017, 2016, and 2015, revenues from the following customers represent 10% or more of consolidated revenues:
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- Definition Revenue by Major Customers by Reporting Segments No definition available.
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Employment Agreements |
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Dec. 31, 2017 | |
| Employment Agreements | Employment Agreements The Company has employment agreements with certain members of its executive management team. These agreements include, among other things, contractually stated base level salaries and a structured cash incentive compensation program dependent upon the Company achieving certain targeted financial results. The agreements typically provide for certain targets such as an EBITDA target, an Operating Margin target and a Safety target, which may be varied from time to time by agreement between the Company and the management executive, as well as a discretionary component. In the event such a member of the executive management team is terminated due to certain events as defined in such officer’s agreement, the employee will continue to receive salary, bonus and other payments for the full remaining term of the agreement. The current term of these employment agreements expires on December 31, 2020 and automatically extends each year thereafter on January 1st, for an additional year. |
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- Definition The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Condensed Consolidating Guarantor Financial Information (Notes) |
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| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Condensed Consolidating Financial Statements of Guarantors | Condensed Consolidating Financial Statements of Guarantors The following tables present the condensed consolidating historical financial statements as of December 31, 2017 2016, and 2015, and for each of the two years ended December 31, 2017, for the domestic subsidiaries of the Company that serve as guarantors of the Company's 2019 convertible senior notes, 2020 senior notes and 2021 senior notes and the financial results for the Company's subsidiaries that do not serve as guarantors. The guarantor subsidiaries of the 2019 convertible senior notes, 2020 senior notes and 2021 senior notes are 100% owned by the Company and the guarantees are full and unconditional and joint and several. The non-guarantor subsidiaries of such notes include all of the Company's foreign subsidiaries. Condensed Consolidating Balance Sheet (In thousands, except per share data)
Condensed Consolidating Balance Sheet (In thousands, except per share data)
Condensed Consolidating Statement of Operations (In thousands)
Condensed Consolidating Statements of Comprehensive Income (Loss) (In thousands)
Condensed Consolidating Statement of Operations (In thousands)
Condensed Consolidating Statements of Comprehensive Income (Loss) (In thousands)
Condensed Consolidating Statement of Operations (In thousands)
Condensed Consolidating Statements of Comprehensive Income (In thousands)
Condensed Consolidating Statements of Cash Flows (In thousands)
Condensed Consolidating Statements of Cash Flows (In thousands)
Condensed Consolidating Statements of Cash Flows (In thousands)
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- Definition The entire disclosure for condensed financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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Supplemental Selected Quarterly Financial Data (Unaudited) |
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| Supplemental Selected Quarterly Financial Data | Supplemental Selected Quarterly Financial Data (Unaudited) (in thousands, except per share data): The following table contains selected unaudited quarterly financial data from the consolidated statements of operations for each quarter of fiscal years 2017 and 2016. The operating results for any quarter are not necessarily indicative of results for any future period.
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Summary of Significant Accounting Policies (Policies) |
12 Months Ended |
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Dec. 31, 2017 | |
| Revenue Recognition | Revenue Recognition The Company charters its OSVs and MPSVs to clients under time charters based on a daily rate of hire and recognizes revenue as earned on a daily basis during the contract period of the specific vessel. Deferred revenue represents payments received from customers or billings submitted to customers in advance of providing vessel access through time charters or other contracted arrangements. Revenue, including lessor accounting Commencing January 1, 2018, the Company's revenues will be classified into three general categories - time charters, vessel management services and shore-base services. For its vessel time charters, the Company will either recognize (i) operating lease revenue as a lessor in accordance with ASC 842 "Leases" or (ii) service revenue in accordance with ASC 606 "Revenue with Contracts with Customers" when its charter agreements do not contain a lease, based on the daily rate of hire. Revenue recognition commences when the vessel is made available to a customer and is earned on a daily basis during the contract period (or lease period) of the specific vessel. Revenues related to the Company’s vessel management services and shore-base services will be recognized under ASC 606. The Company’s revenue recognition policies are not materially impacted by the adoption of these standards as neither the amount nor timing of the revenue to be recognized is substantially changed by the new standards. Accordingly, the Company will not be required to record a transition adjustment for revenue as a result of adoption. However, the Company’s classification of revenue and disclosures will be expanded. |
| Cash and Cash Equivalents | Cash and Cash Equivalents Cash and cash equivalents consist of all highly liquid investments in money market funds, deposits and investments available for current use with an initial maturity of three months or less. |
| Accounts Receivable | Accounts Receivable Accounts receivable consists of trade receivables, net of reserves and amounts to be rebilled to customers. |
| Property, Plant and Equipment | Property, Plant and Equipment Property, plant and equipment is recorded at cost. Depreciation and amortization of equipment and leasehold improvements are computed using the straight-line method based on the estimated useful lives of the related assets. Major modifications and improvements, which extend the useful life of the vessel, are capitalized and amortized over the remaining useful life of the vessel. Gains and losses from retirements or other dispositions are recognized as incurred. Salvage values for new generation marine equipment are estimated to be 25% of the originally recorded cost. |
| Lessee, Leases | Lessee accounting The Company currently accounts for operating leases under ASC 840, recognizing lease expense ratably over the term of the arrangement. Under ASC 842, the Company will be required to measure and record a right-of-use asset and corresponding lease liability on its balance sheet using the present value of the future payments under its operating lease commitments. The estimated impact of the adoption of this ASC as of January 1, 2018, will be an increase to assets and liabilities on the Company's financial statements to reflect the right of use assets and lease obligations in a range from $27.0 million to $30.0 million. The adoption of the new standard is not expected to result in a change in the amount of lease expense currently being recognized. |
| Deferred Charges | Deferred Charges The Company’s vessels are required by regulation to be recertified after certain periods of time. The Company defers the drydocking expenditures incurred due to regulatory marine inspections and amortizes the costs on a straight-line basis over the period to be benefited from such expenditures (generally 30 months). Financing charges are amortized over the term of the related debt. Deferred charges also include prepaid lease expenses related to the Company’s shore-base port facility. Such prepaid lease expenses are being amortized on a straight-line basis over the effective remaining term of the lease. |
| Precontract Costs, Policy | Mobilization Costs The Company incurs mobilization costs to transit its vessels to and from certain regions and/or for long-term contracts. These costs, which are typically expensed as incurred, include, but are not limited to, fuel, crew wages, vessel modification and pre-positioning expenses, materials and supplies and importation taxes. |
| Income Taxes | Income Taxes Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using currently enacted tax rates. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The provision for income taxes includes provisions for federal, state and foreign income taxes. Interest and penalties relating to uncertain tax positions are recorded as general and administrative expenses. In addition, the Company provides a valuation allowance for deferred tax assets if it is more likely than not that such items will either expire before the Company is able to realize the benefit or the future deductibility is uncertain. As of December 31, 2017, the Company determined it is more likely than not that a portion of deferred tax assets may not be utilized prior to their expiration and therefore has established a valuation allowance of $33.1 million. |
| Use of Estimates | Use of Estimates The preparation of financial statements in conformity with United States generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. |
| Commitments and Contingencies, Policy | Legal Liabilities In the ordinary course of business, the Company may become party to lawsuits, administrative proceedings, or governmental investigations. These matters may involve large or unspecified damages or penalties that may be sought from the Company and may require years to resolve. The Company records a liability related to a loss contingency to such legal matters in accrued liabilities if the Company determines the loss to be both probable and estimable. The liability is recorded for an amount that is management’s best estimate of the loss, or when a best estimate cannot be made, the minimum loss amount of a range of possible outcomes. Significant judgment is required in estimating such liabilities, the results of which can vary significantly from the actual outcomes of lawsuits, administrative proceedings or governmental investigations. |
| Concentration of Credit Risk | Concentration of Credit Risk Customers are primarily major and independent, domestic and international, oil and oil service companies, as well as national oil companies and the U.S. military. The Company’s customers are granted credit on a short-term basis and related credit risks are considered minimal. The Company usually does not require collateral. The Company provides an estimate for uncollectible accounts based primarily on management’s judgment using the relative age of customer balances, historical losses, current economic conditions and individual evaluations of each customer to make adjustments to the allowance for doubtful accounts. |
| Foreign Currency Transactions and Translations Policy | Foreign Currency Transaction Gains and Losses Foreign currency transaction gains and losses are recorded in the period incurred except for advances to and investments in foreign subsidiaries. Foreign currency gains and losses related to advances to or investments in foreign operations are accounted for as a foreign currency translation adjustment and recorded as other comprehensive income. Foreign currency transaction adjustments for fiscal years 2017, 2016 and 2015 were not material to the financial statements. The balance in accumulated other comprehensive income as of December 31, 2017 relates primarily to the Company’s long term investments in its foreign subsidiaries. |
| Impairment of Long-Lived Assets | Considerations Regarding Impairment of Long-Lived Assets In accordance with ASC 360, the Company periodically reviews long-lived asset valuations when events or changes in circumstances indicate that an asset's carrying value might not be recoverable. If indicators of impairment exist, the Company assesses the recoverability of its long-lived assets by comparing the projected future undiscounted cash flows associated with the related long-lived asset group over their remaining estimated useful lives. If the sum of the estimated undiscounted cash flows is less than the carrying amounts of the asset group, the assets would be written down to their estimated fair values based on the expected discounted future cash flows or appraised values attributable to the assets. The future cash flows are subjective and are based on the Company's current assumptions regarding future dayrates, utilization, operating expense, G&A expense and recertification costs that could differ from actual results. During the second quarter of 2016, the Company determined that it observed indicators of impairment related to its vessels. This resulted from the rapid deterioration of its second quarter 2016 operating results, as well as the uncertainty regarding future market conditions and the related impact on the Company's projected operating results. For the purposes of calculating the undiscounted cash flows, the Company groups its vessels into two groups, OSVs and MPSVs, and used a probability-weighted undiscounted cash flow projection to test for recoverability. After reviewing the results of this calculation, the Company determined that each of its asset groups has sufficient projected undiscounted cash flows to recover the remaining book value of the Company's long-lived assets within such group. While the Company has not observed any new impairment indicators since 2016, the Company has reviewed and updated, as necessary, the assumptions used in determining its undiscounted cash flow projections for each asset group to reflect current market conditions. After reviewing the result of the updated projections, as part of its 2017 close, the Company determined that each of its asset groups has sufficient projected undiscounted cash flows to recover the remaining book value of the Company's long-lived assets within such groupings. |
| X | ||||||||||
- Definition Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Disclosure of accounting policy for commitments and contingencies, which may include policies for recognizing and measuring loss and gain contingencies. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Disclosure of accounting policy for credit risk. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Disclosure of accounting policy for deferral and amortization of significant deferred charges. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Disclosure of accounting policy for (1) transactions denominated in a currency other than the reporting enterprise's functional currency, (2) translating foreign currency financial statements that are incorporated into the financial statements of the reporting enterprise by consolidation, combination, or the equity method of accounting, and (3) remeasurement of the financial statements of a foreign reporting enterprise in a hyperinflationary economy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Disclosure of accounting policy for recognizing and measuring the impairment of long-lived assets. An entity also may disclose its accounting policy for long-lived assets to be sold. This policy excludes goodwill and intangible assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Disclosure of accounting policy for leasing arrangement entered into by lessee. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Disclosure of accounting policy for recording or deferring costs in anticipation of future contract sales in a variety of circumstances. The costs may consist of (a) costs incurred in anticipation of a specific contract that will result in no future benefit unless the contract is obtained (such as the costs of mobilization, engineering, architectural, or other services incurred on the basis of commitments or other indications of interest in negotiating a contract), (b) costs incurred for assets to be used in connection with specific anticipated contracts (for example, costs for the purchase of production equipment, materials, or supplies), (c) costs incurred to acquire or produce goods in excess of the amounts required under a contract in anticipation of future orders for the same item, and (d) learning, start-up, or mobilization costs incurred for anticipated but unidentified contracts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Disclosure of accounting policy for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, basis of assets, depreciation and depletion methods used, including composite deprecation, estimated useful lives, capitalization policy, accounting treatment for costs incurred for repairs and maintenance, capitalized interest and the method it is calculated, disposals and impairments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Disclosure of accounting policy for trade and other accounts receivables. This disclosure may include the basis at which such receivables are carried in the entity's statements of financial position (for example, net realizable value), how the entity determines the level of its allowance for doubtful accounts, when impairments, charge-offs or recoveries are recognized, and the entity's income recognition policies for such receivables, including its treatment of related fees and costs, its treatment of premiums, discounts or unearned income, when accrual of interest is discontinued, how the entity records payments received on nonaccrual receivables and its policy for resuming accrual of interest on such receivables. If the enterprise holds a large number of similar loans, disclosure may include the accounting policy for the anticipation of prepayments and significant assumptions underlying prepayment estimates for amortization of premiums, discounts, and nonrefundable fees and costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Summary of Significant Accounting Policies (Tables) |
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| Estimated Useful Lives by Classification | The estimated useful lives by classification are as follows:
See “Considerations Regarding Impairment of Long-Lived Assets” below for more information. |
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| Allowance for Doubtful Accounts | The following table represents the allowance for doubtful accounts (in thousands):
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| Schedule of New Accounting Pronouncements and Changes in Accounting Principles | Recent Accounting Pronouncements The following table provides a brief description of recent accounting pronouncements that could have a material effect on the Company's financial statements:
ASC 842, Leases ASC 842 was released in February 2016 to increase transparency and comparability among organizations by recognizing all leases on the balance sheet and disclosing key information about leasing arrangements. The main difference between current accounting standards and ASC 842 is the recognition of assets and liabilities by lessees for those leases classified as operating leases under current accounting standards. The effective date of the new standard is January 1, 2019, however, the Company will elect to early adopt the standard effective January 1, 2018. The Company will adopt the standard using the modified retrospective method. In February 2018, the FASB proposed two practical expedients in regard to the new leases standard:
The Company plans to adopt the new leases standard utilizing both of the proposed practical expedients, which it expects to be finalized by the FASB prior to the release of its first quarter 2018 financial statements. However, if the FASB does not incorporate this guidance into the accounting standards, the Company may be required to modify its disclosures and/or classification of its time charter revenues. The Company does not expect there to be a material difference in either the amount or timing of how time charter revenue is expected to be recorded using the practical expedients. |
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| Schedule of New Accounting Pronouncements Not yet Adopted |
ASC 842, Leases ASC 842 was released in February 2016 to increase transparency and comparability among organizations by recognizing all leases on the balance sheet and disclosing key information about leasing arrangements. The main difference between current accounting standards and ASC 842 is the recognition of assets and liabilities by lessees for those leases classified as operating leases under current accounting standards. The effective date of the new standard is January 1, 2019, however, the Company will elect to early adopt the standard effective January 1, 2018. The Company will adopt the standard using the modified retrospective method. In February 2018, the FASB proposed two practical expedients in regard to the new leases standard:
The Company plans to adopt the new leases standard utilizing both of the proposed practical expedients, which it expects to be finalized by the FASB prior to the release of its first quarter 2018 financial statements. However, if the FASB does not incorporate this guidance into the accounting standards, the Company may be required to modify its disclosures and/or classification of its time charter revenues. The Company does not expect there to be a material difference in either the amount or timing of how time charter revenue is expected to be recorded using the practical expedients. |
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- Definition Allowance for Doubtful Accounts, Table No definition available.
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- Definition Property, Plant and Equipment, Useful Life No definition available.
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- Definition Schedule of New Accounting Pronouncements Not yet Adopted [Table Text Block] No definition available.
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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Earnings (Loss) Per Share (Tables) |
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| Earnings Per Share [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Reconciliation of Earnings Per Share | The table below reconciles the Company’s earnings per share (in thousands, except for per share data):
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- References No definition available.
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Property, Plant and Equipment (Tables) |
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| Property, Plant and Equipment | Property, plant and equipment consisted of the following (in thousands):
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Long-Term Debt (Tables) |
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| Debt Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Outstanding Long-Term Debt | As of the dates indicated below, the Company had the following outstanding long-term debt (in thousands):
The table below summarizes the Company's cash interest payments (in thousands):
(1) The interest rate on the first-lien credit facility is variable based on the Company's election. The amount reflected in this table is the monthly amount payable based on the 30-day LIBOR interest rate that was elected and in effect on December 31, 2017. Please see further discussion of the variable interest rate below. |
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| Annual Maturities of Debt | Annual maturities of debt, excluding the potential effects of conditions discussed in Convertible Senior Notes, during each year ending December 31, are as follows (in thousands):
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| Schedule of Face Value, Carrying Value and Fair Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] | As of the dates indicated below, the Company had the following face values, carrying values and fair values (in thousands):
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- Definition [Line Items] for Schedule of Face Value, Carrying Value and Fair Value [Table] No definition available.
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- References No definition available.
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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. No definition available.
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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Stock-Based Compensation (Tables) |
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| Financial Impact of Stock-Based Compensation Expense Charges | The financial impact of stock-based compensation expense related to the Company’s incentive compensation plan on its operating results are reflected in the table below (in thousands, except for per share data):
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| Summary of Stock Option Activity | The following table represents the Company’s stock option activity for the year ended December 31, 2017 (in thousands, except per share data and years):
The following table represents the Company’s stock option activity for the year ended December 31, 2015 (in thousands, except per share data and years):
The following table represents the Company’s stock option activity for the year ended December 31, 2016 (in thousands, except per share data and years):
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| Summary of Restricted Stock Award Activity | The following table summarizes the equity-settled restricted stock unit awards activity during the year ended December 31, 2016 (in thousands, except per share data):
The following table summarizes the equity-settled restricted stock unit awards activity during the year ended December 31, 2015 (in thousands, except per share data):
The following table summarizes the equity-settled restricted stock unit awards activity during the year ended December 31, 2017 (in thousands, except per share data):
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| Schedule of Other Share-based Compensation, Activity [Table Text Block] | The following table summarizes the cash-settled restricted stock unit awards activity during the year ended December 31, 2016 (in thousands, except per share data):
The following table summarizes the cash-settled restricted stock unit awards activity during the year ended December 31, 2017 (in thousands, except per share data):
The following table summarizes the cash-settled restricted stock unit awards activity during the year ended December 31, 2015 (in thousands, except per share data):
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| Summary of Weighted Average Assumptions and Fair Value of Options under ESPP | The fair value of the employees’ stock purchase rights granted under the ESPP was estimated using the Black-Scholes model with the following assumptions for the years ended December 31, 2017 and 2016:
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| X | ||||||||||
- Definition Incentive Compensation Plans Expense Recognized In Earnings No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure of the changes in other outstanding share-based compensation awards other than stock options or nonvested awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure for share-based compensation plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Income Taxes (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2017 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Components of Long Term Deferred Tax Liabilities Net | The net long-term deferred tax liabilities in the accompanying consolidated balance sheets include the following components (in thousands):
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| Components of Income Tax Expenses | The components of the income tax expense follow (in thousands):
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| Income (Loss) Before Income Taxes Based on Jurisdiction Earned | Income from operations before income taxes, based on jurisdiction earned, was as follows (in thousands):
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| Reconciliation of Difference Between Company's Income Tax Provision Calculated at Federal Statutory Rate and Actual Income Tax Provision | The following table reconciles the difference between the Company’s income tax provision calculated at the federal statutory rate of 35% and the actual income tax provision (in thousands):
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| X | ||||||||||
- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Tabular disclosure of income before income tax between domestic and foreign jurisdictions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Commitments and Contingencies (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 | |||||||||||||||||||||||||||||||||||||||||
| Future Minimum Payments Under Noncancelable Leases | Future minimum payments under noncancelable leases for years subsequent to 2017 are as follows (in thousands):
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| X | ||||||||||
- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Deferred Charges (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2017 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deferred Charges | Deferred charges include the following (in thousands):
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| X | ||||||||||
- Definition Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Other Accrued Liabilities (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accrued Liabilities, Current [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Accrued Liabilities [Table Text Block] | Other accrued liabilities include the following (in thousands):
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of the components of accrued liabilities. No definition available.
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Major Customers (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenues from Customer Exceeding 10% | In the years ended December 31, 2017, 2016, and 2015, revenues from the following customers represent 10% or more of consolidated revenues:
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| X | ||||||||||
- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. No definition available.
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Condensed Consolidating Guarantor Financial Information (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2017 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Condensed Balance Sheet | Condensed Consolidating Balance Sheet (In thousands, except per share data)
Condensed Consolidating Balance Sheet (In thousands, except per share data)
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| Condensed Income Statement | Condensed Consolidating Statement of Operations (In thousands)
Condensed Consolidating Statement of Operations (In thousands)
Condensed Consolidating Statement of Operations (In thousands)
|
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| Condensed Statement of Comprehensive Income | Condensed Consolidating Statements of Comprehensive Income (Loss) (In thousands)
Condensed Consolidating Statements of Comprehensive Income (In thousands)
Condensed Consolidating Statements of Comprehensive Income (Loss) (In thousands)
|
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| Condensed Cash Flow Statement | Condensed Consolidating Statements of Cash Flows (In thousands)
Condensed Consolidating Statements of Cash Flows (In thousands)
Condensed Consolidating Statements of Cash Flows (In thousands)
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
- Definition Tabular disclosure of condensed statement of comprehensive income (loss) including, but not limited to, statements of comprehensive income (loss) of consolidated entities and consolidation eliminations. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Tabular disclosure of condensed balance sheet, including, but not limited to, balance sheets of consolidated entities and consolidation eliminations. No definition available.
|
| X | ||||||||||
- Definition Tabular disclosure of condensed cash flow statement, including, but not limited to, cash flow statements of consolidated entities and consolidation eliminations. No definition available.
|
| X | ||||||||||
- Definition Tabular disclosure of condensed income statement, including, but not limited to, income statements of consolidated entities and consolidation eliminations. No definition available.
|
Supplemental Selected Quarterly Financial Data (Unaudited) (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2017 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Unaudited Quarterly Financial Data | The following table contains selected unaudited quarterly financial data from the consolidated statements of operations for each quarter of fiscal years 2017 and 2016. The operating results for any quarter are not necessarily indicative of results for any future period.
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Summary of Significant Accounting Policies - Estimated Useful Lives by Classification (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2017 | |
| Maximum | |
| Significant Accounting Policies [Line Items] | |
| Property, Plant and Equipment, Salvage Value, Percentage | 25.00% |
| Offshore Supply Vessels | |
| Significant Accounting Policies [Line Items] | |
| Estimated useful life | 25 years |
| Multi Purpose Support Vessel | |
| Significant Accounting Policies [Line Items] | |
| Estimated useful life | 25 years |
| Non-vessel related property, plant and equipment | Minimum | |
| Significant Accounting Policies [Line Items] | |
| Estimated useful life | 3 years |
| Non-vessel related property, plant and equipment | Maximum | |
| Significant Accounting Policies [Line Items] | |
| Estimated useful life | 28 years |
| X | ||||||||||
- Definition Significant Accounting Policies [Line Items] No definition available.
|
| X | ||||||||||
- Definition Stated as a percentage, the estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose) divided by its [historical] capitalized cost. No definition available.
|
| X | ||||||||||
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2017
USD ($)
mo
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Significant Accounting Policies [Line Items] | |||
| Amortization period for deferred charges | mo | 30 | ||
| Valuation Allowance, Deferred Tax Asset, Change in Amount | $ 33,100 | $ 2,295 | $ (1,011) |
| Maximum | |||
| Significant Accounting Policies [Line Items] | |||
| Salvage values for marine equipment | 25.00% | ||
| Accounting Standards Update 2016-02 [Member] | Minimum | |||
| Significant Accounting Policies [Line Items] | |||
| OperatingLeaseRightOfUseAssets | $ 27,000 | ||
| OperatingLeaseLiabilities | 27,000 | ||
| Accounting Standards Update 2016-02 [Member] | Maximum | |||
| Significant Accounting Policies [Line Items] | |||
| OperatingLeaseRightOfUseAssets | 30,000 | ||
| OperatingLeaseLiabilities | $ 30,000 | ||
| X | ||||||||||
- Definition Amortization Period For Deferred Charges No definition available.
|
| X | ||||||||||
- Definition OperatingLeaseLiabilities No definition available.
|
| X | ||||||||||
- Definition OperatingLeaseRightOfUseAssets No definition available.
|
| X | ||||||||||
- Definition Significant Accounting Policies [Line Items] No definition available.
|
| X | ||||||||||
- Definition Stated as a percentage, the estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose) divided by its [historical] capitalized cost. No definition available.
|
| X | ||||||||||
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Significant Accounting Policies [Line Items] | |||
| Provision for Doubtful Accounts | $ 3,934 | $ (757) | $ (816) |
| Balance, beginning of year | 2,120 | 2,877 | 3,693 |
| Balance, end of year | $ 6,054 | $ 2,120 | $ 2,877 |
| X | ||||||||||
- Definition Significant Accounting Policies [Line Items] No definition available.
|
| X | ||||||||||
- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Earnings (Loss) Per Share - Reconciliation of Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
[1],[2] | Jun. 30, 2017 |
[1],[2] | Mar. 31, 2017 |
[1],[2] | Dec. 31, 2016 |
[2] | Sep. 30, 2016 |
[2] | Jun. 30, 2016 |
[2] | Mar. 31, 2016 |
[2] | Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|||||||||||||
| Earnings Per Share [Abstract] | ||||||||||||||||||||||||||||||
| Net Income (loss) | $ 93,758 | [1],[2] | $ (18,950) | $ (19,489) | $ (27,898) | $ (19,243) | $ (16,503) | $ (20,586) | $ (7,514) | $ 27,421 | $ (63,846) | $ 66,821 | [3] | |||||||||||||||||
| Weighted average number of shares of common stock outstanding | 36,858,000 | 36,248,000 | 35,755,000 | |||||||||||||||||||||||||||
| Add: Net effect of dilutive stock options and unvested restricted stock (2)(3)(4) | [4],[5] | 806,000 | 0 | 547,000 | ||||||||||||||||||||||||||
| Weighted average number of dilutive shares of common stock outstanding | 37,664,000 | 36,248,000 | 36,302,000 | |||||||||||||||||||||||||||
| Basic earnings (loss) per common share | $ 2.53 | [1],[2] | $ (0.51) | $ (0.53) | $ (0.76) | $ (0.53) | $ (0.45) | $ (0.57) | $ (0.21) | $ 0.74 | $ (1.76) | $ 1.87 | ||||||||||||||||||
| Diluted earnings (loss) per common share | $ 2.48 | [1],[2] | $ (0.51) | $ (0.53) | $ (0.76) | $ (0.53) | $ (0.45) | $ (0.57) | $ (0.21) | $ 0.73 | $ (1.76) | $ 1.84 | ||||||||||||||||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||||||||||||||||||||||||||||
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 125,225 | $ (125,225) | $ 0 | $ 0 | ||||||||||||||||||||||||||
| Net Income (loss) excluding one time tax item | $ (17,281) | $ (82,687) | ||||||||||||||||||||||||||||
| Earnings per share diluted excluding one time tax item | $ (0.47) | $ (2.24) | ||||||||||||||||||||||||||||
| Anti-dilutive shares excluded from the calculation of diluted earnings per share | 185 | 975 | 322 | |||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||
| X | ||||||||||
- Definition The amount of net income (loss) for the period available excluding one time tax items to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. No definition available.
|
| X | ||||||||||
- Definition Net Income (loss) attributable to the parent excluding one time tax item No definition available.
|
| X | ||||||||||
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Defined Contribution Plan - Additional Information (Detail) |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2017
USD ($)
yr
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] | |||
| Deferred Compensation Arrangement with Individual, Contributions by Employer | $ | $ 0 | $ 0 | $ 0 |
| Minimum age to be eligible for participation | yr | 18 | ||
| Period of service to be eligible for participation | 3 months | ||
| Percentage of earnings that can be deferred | 60.00% | ||
| X | ||||||||||
- Definition Defined Benefit Plan, Employee Contribution, Age No definition available.
|
| X | ||||||||||
- Definition Defined Benefit Plan, Service Period No definition available.
|
| X | ||||||||||
- Definition Maximum 401(k) Plan Contribution Rates as a Percentage of Employees Earnings No definition available.
|
| X | ||||||||||
- Definition Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
Property, Plant and Equipment (Detail) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Less: Accumulated depreciation | $ (637,607) | $ (539,561) |
| Property Plant And Equipment Excluding Construction In Progress Net | 2,320,541 | 2,418,148 |
| Construction in progress | 180,472 | 160,240 |
| Property, plant and equipment, net | 2,501,013 | 2,578,388 |
| Offshore supply vessels and multi-purpose support vessels | ||
| Property, Plant and Equipment [Line Items] | ||
| Property Plant and Equipment, Gross | 2,825,639 | 2,825,389 |
| Non-vessel related property, plant and equipment | ||
| Property, Plant and Equipment [Line Items] | ||
| Property Plant and Equipment, Gross | $ 132,509 | $ 132,320 |
| X | ||||||||||
- Definition Property Plant And Equipment Excluding Construction In Progress Net No definition available.
|
| X | ||||||||||
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Property, Plant and Equipment - Additional Information (Detail) $ / shares in Units, $ in Thousands |
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Nov. 30, 2011
Vessel
Shipyard
|
Dec. 31, 2017
USD ($)
Vessel
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
Vessel
$ / shares
|
|
| Property, Plant and Equipment [Line Items] | ||||
| Aggregate cost of OSV newbuild program excluding construction period interest | $ | $ 1,335,000 | |||
| Cost incurred on OSV newbuild program | $ | $ 1,272,700 | |||
| Percentage of total project cost | 95.30% | |||
| NumberofVesselsSold | 4 | |||
| Proceeds from Sale of Other Property, Plant, and Equipment | $ | $ 152,000 | |||
| (Gain) loss on sale of assets | $ | $ (121) | $ 54 | 44,060 | |
| Gain (Loss) on Disposition of Assets | $ | $ 27,600 | |||
| Gain (Loss) on Disposition of Assets, net of tax per share | $ / shares | $ 0.76 | |||
| Newbuild program 5 | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Number Of Construction Shipyards, Domestic | Shipyard | 3 | |||
| Number of Vessels Placed in Service | 22 | |||
| Number Of Vessels | 24 | 2 | ||
| Aggregate cost of OSV newbuild program excluding construction period interest | $ | $ 1,335,000 | |||
| Cost incurred on OSV newbuild program | $ | $ 1,272,700 | |||
| Percentage of total project cost | 95.30% | |||
| Newbuild program 5 | Offshore Supply Vessel Class 300 | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Number of vessels to be constructed | 4 | |||
| Newbuild program 5 | Offshore Supply Vessel Class 310 | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Number of vessels to be constructed | 5 | |||
| Newbuild program 5 | Offshore Supply Vessel Class 320 | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Number of vessels to be constructed | 10 | |||
| Newbuild program 5 | Multi Purpose Supply Vessel Class 310 | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Number of vessels to be constructed | 3 | |||
| Newbuild program 5 | Multi Purpose Supply Vessel Class 400 | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Number of vessels to be constructed | 2 | |||
| X | ||||||||||
- Definition Costs Incurred for Offshore Supply Vessels Newbuild Program Net of Capitalized Interest No definition available.
|
| X | ||||||||||
- Definition Estimated Construction Cost No definition available.
|
| X | ||||||||||
- Definition Gain (Loss) on Disposition of Assets, net of tax per share No definition available.
|
| X | ||||||||||
- Definition Number Of Construction Shipyards, Domestic No definition available.
|
| X | ||||||||||
- Definition Number Of Vessels No definition available.
|
| X | ||||||||||
- Definition Number of vessels to be constructed No definition available.
|
| X | ||||||||||
- Definition Number of Vessels Placed in Service No definition available.
|
| X | ||||||||||
- Definition NumberofVesselsSold No definition available.
|
| X | ||||||||||
- Definition Percentage of Total Project cost No definition available.
|
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow for the sale of long-lived, physical assets used to produce goods and services and not intended for resale, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Long-Term Debt - Outstanding Long-Term Debt (Detail) - USD ($) $ in Thousands |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
Apr. 01, 2018 |
Mar. 01, 2018 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Aug. 13, 2012 |
Mar. 02, 2012 |
|
| Debt Instrument [Line Items] | ||||||||
| Deferred Finance Costs, Net | $ 10,134 | $ 10,197 | ||||||
| Long-term debt, original issue discount | 7,862 | 31,093 | ||||||
| Long-term debt, Excluding Current Maturities | 1,080,826 | 1,083,710 | ||||||
| Cash Paid for Interest | 52,194 | 50,152 | $ 50,492 | |||||
| Long-term Debt | 1,080,826 | 1,083,710 | ||||||
| Debt Instrument, Face Amount | 1,079,911 | 1,125,000 | ||||||
| Debt, Fair Value | $ 717,955 | $ 788,476 | ||||||
| Senior Notes 5.875 Percent Due 2020 | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Interest Rate | 5.875% | 5.875% | ||||||
| Deferred Finance Costs, Net | $ 2,061 | $ 3,025 | ||||||
| Senior Notes | 364,881 | 371,975 | ||||||
| Debt Instrument, Face Amount | 366,942 | 375,000 | $ 375,000 | |||||
| Debt, Fair Value | $ 244,714 | $ 270,938 | ||||||
| Senior Notes 5.000 Percent Due 2021 | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Interest Rate | 5.00% | 5.00% | ||||||
| Deferred Finance Costs, Net | $ 3,142 | $ 4,111 | ||||||
| Senior Notes | 446,858 | 445,889 | ||||||
| Debt Instrument, Face Amount | 450,000 | 450,000 | ||||||
| Debt, Fair Value | $ 236,250 | $ 301,343 | ||||||
| Convertible 1.500 Percent Senior Notes Due 2019 | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Interest Rate | 1.50% | 1.50% | ||||||
| Deferred Finance Costs, Net | $ 1,486 | $ 3,061 | ||||||
| Long-term debt, original issue discount | 6,634 | 31,093 | ||||||
| Senior Notes | 91,527 | 265,846 | ||||||
| Debt Instrument, Face Amount | 99,647 | 300,000 | $ 300,000 | |||||
| Debt, Fair Value | 74,486 | 216,195 | ||||||
| Revolving Credit Facility Due 2016 | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term Line of Credit | 177,560 | 0 | ||||||
| First-Lien Credit Facility Maturing Twenty Twenty Three [Member] [Domain] | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Deferred Finance Costs, Net | 3,445 | |||||||
| Long-term debt, original issue discount | 1,228 | |||||||
| Deferred Gain | 18,911 | 0 | ||||||
| Long-term Line of Credit | 177,560 | 0 | ||||||
| Debt Instrument, Face Amount | 163,322 | 0 | ||||||
| Debt, Fair Value | $ 162,505 | $ 0 | ||||||
| Subsequent Event [Member] | Senior Notes 5.875 Percent Due 2020 | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Cash Paid for Interest | $ 10,779 | |||||||
| Subsequent Event [Member] | Senior Notes 5.000 Percent Due 2021 | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Cash Paid for Interest | $ 11,250 | |||||||
| Subsequent Event [Member] | Convertible 1.500 Percent Senior Notes Due 2019 | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Cash Paid for Interest | $ 747 | |||||||
| Subsequent Event [Member] | First-Lien Credit Facility Maturing Twenty Twenty Three [Member] [Domain] | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Debt Instrument, Periodic Payment, Interest | $ 1,025 | |||||||
| X | ||||||||||
- Definition Amount, after accumulated amortization, of deferred gain that resulted from a debt exchange. No definition available.
|
| X | ||||||||||
- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of the required periodic payments applied to interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, after accumulated amortization, of debt discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash paid for interest. Includes, but is not limited to, payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Long-Term Debt - Annual Maturities of Debt (Details) - USD ($) $ in Thousands |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Aug. 13, 2012 |
Dec. 31, 2017 |
Dec. 31, 2015 |
Dec. 31, 2012 |
Dec. 31, 2016 |
Mar. 02, 2012 |
|
| Debt Instrument [Line Items] | ||||||
| Debt Instrument, Fair Value Disclosure | $ 717,955 | $ 788,476 | ||||
| Debt Instrument, Face Amount | 1,079,911 | 1,125,000 | ||||
| Senior Notes Five Point Eight Seven Five Percent Due Twenty Twenty [Member] | ||||||
| Debt Instrument [Line Items] | ||||||
| Debt Instrument, Fair Value Disclosure | 244,714 | 270,938 | ||||
| Debt Instrument, Face Amount | 366,942 | 375,000 | $ 375,000 | |||
| Debt Instrument Maturity Year | 2020 | |||||
| Debt Instrument, Maturity Date | Apr. 01, 2020 | |||||
| Senior Notes Five Point Zero Zero Zero Percent Due Twenty Twenty One [Member] | ||||||
| Debt Instrument [Line Items] | ||||||
| Debt Instrument, Fair Value Disclosure | 236,250 | 301,343 | ||||
| Debt Instrument, Face Amount | 450,000 | 450,000 | ||||
| Debt Instrument Maturity Year | 2021 | |||||
| Debt Instrument, Maturity Date | Mar. 01, 2021 | |||||
| Convertible One Point Five Percent Senior Notes Due Twenty Nineteen [Member] | ||||||
| Debt Instrument [Line Items] | ||||||
| Debt Instrument, Fair Value Disclosure | 74,486 | 216,195 | ||||
| Debt Instrument, Face Amount | $ 300,000 | $ 99,647 | 300,000 | |||
| Debt Instrument Maturity Year | 2019 | |||||
| Debt Instrument, Maturity Date | Sep. 01, 2019 | |||||
| First-Lien Credit Facility Maturing Twenty Twenty Three [Member] [Domain] | ||||||
| Debt Instrument [Line Items] | ||||||
| Debt Instrument, Fair Value Disclosure | $ 162,505 | 0 | ||||
| Debt Instrument, Face Amount | $ 163,322 | $ 0 | ||||
| X | ||||||||||
- Definition Debt Instrument Maturity Year No definition available.
|
| X | ||||||||||
- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Long-Term Debt - Additional Information (Details) |
1 Months Ended | 3 Months Ended | 12 Months Ended | 24 Months Ended | 72 Months Ended | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Oct. 01, 2017 |
Sep. 01, 2017 |
Apr. 01, 2017 |
Mar. 01, 2017 |
Mar. 14, 2013
USD ($)
|
Aug. 13, 2012
USD ($)
$ / shares
|
Aug. 13, 2012
USD ($)
$ / shares
|
Apr. 30, 2012
USD ($)
|
Mar. 16, 2012
USD ($)
|
Mar. 02, 2012
USD ($)
|
Aug. 07, 2012
$ / shares
|
Sep. 30, 2017
USD ($)
|
Jun. 15, 2021 |
Jun. 15, 2020 |
Jun. 15, 2019 |
Jun. 15, 2018 |
Dec. 31, 2017
USD ($)
$ / shares
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2013
USD ($)
|
Dec. 31, 2012
USD ($)
|
Jun. 15, 2023 |
Jun. 15, 2023 |
Dec. 31, 2019
USD ($)
|
Dec. 31, 2018
USD ($)
|
Jun. 16, 2017
USD ($)
|
Jun. 15, 2017
USD ($)
|
|
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Deferred Finance Costs, Net | $ 10,134,000 | $ 10,197,000 | |||||||||||||||||||||||||
| Debt Instrument, Principal amount | 1,079,911,000 | 1,125,000,000 | |||||||||||||||||||||||||
| First-Lien Credit Facility Covenant Minimum Delayed Draw Commitment | 67,000,000 | ||||||||||||||||||||||||||
| GainOnExchangeOfDebtInstrument | $ 20,700,000 | ||||||||||||||||||||||||||
| Repayments of Senior Debt | 5,057,000 | 0 | $ 0 | ||||||||||||||||||||||||
| Gain (Loss) on Extinguishment of Debt | $ 15,478,000 | 0 | 0 | $ (25,800,000) | $ (6,000,000) | ||||||||||||||||||||||
| Proceeds from Convertible Debt | $ 300,000,000 | ||||||||||||||||||||||||||
| Debt Instrument, Convertible, Conversion Ratio | 18.5718 | ||||||||||||||||||||||||||
| Conversion Price per Share | $ / shares | $ 53.85 | $ 53.85 | |||||||||||||||||||||||||
| Market Price Per Share | $ / shares | $ 39.16 | ||||||||||||||||||||||||||
| Repurchase Price As Percentage Of Principal Amount Of Senior Notes | 100.00% | ||||||||||||||||||||||||||
| Proceeds from Issuance of Warrants | $ 48,200,000 | ||||||||||||||||||||||||||
| Purchase Of Convertible Note Hedges | 73,000,000 | ||||||||||||||||||||||||||
| Debt, Fair Value | $ 717,955,000 | 788,476,000 | |||||||||||||||||||||||||
| Capitalized interest, approximate amount | 10,200,000 | 16,700,000 | $ 24,700,000 | ||||||||||||||||||||||||
| First-Lien Credit Facility Maturing Twenty Twenty Three [Member] [Domain] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| First Lien Credit Facility, Current Borrowing Capacity | $ 300,000,000 | ||||||||||||||||||||||||||
| Deferred Finance Costs, Net | 3,445,000 | ||||||||||||||||||||||||||
| Debt Instrument, Principal amount | 163,322,000 | 0 | |||||||||||||||||||||||||
| FirstLienCreditFacilityCovenantMinimumAvailableLiquidity | 25,000,000 | ||||||||||||||||||||||||||
| First-Lien Credit Facility Covenant Minimum Liquidity For Prepayment | 65,000,000 | ||||||||||||||||||||||||||
| Debt Instrument, Exchange Amount | 95,300,000 | ||||||||||||||||||||||||||
| Letter of Credit | 177,560,000 | 0 | |||||||||||||||||||||||||
| Debt, Fair Value | $ 162,505,000 | $ 0 | |||||||||||||||||||||||||
| Revolving Credit Facility [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Line of Credit Facility, Maximum Borrowing Capacity | 75,000,000 | ||||||||||||||||||||||||||
| Revolving credit facility, Current Borrowing Capacity | 200,000,000 | ||||||||||||||||||||||||||
| Senior notes 6.125 Percent Due 2014 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Percentage Of debt outstanding tendered | 16.00% | 84.00% | |||||||||||||||||||||||||
| Senior Notes 8.000 Percent Due 2017 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Percentage Of debt outstanding tendered | 94.00% | ||||||||||||||||||||||||||
| Senior Notes 5.875 Percent Due 2020 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Interest Rate | 5.875% | 5.875% | |||||||||||||||||||||||||
| Deferred Finance Costs, Net | $ 2,061,000 | $ 3,025,000 | |||||||||||||||||||||||||
| Debt Instrument, Principal amount | $ 375,000,000 | 366,942,000 | 375,000,000 | ||||||||||||||||||||||||
| Proceeds from Issuance of Senior Long-term Debt | $ 367,400,000 | ||||||||||||||||||||||||||
| Extinguishment of Debt, Amount | 8,100,000 | ||||||||||||||||||||||||||
| Repayments of Senior Debt | $ 16,600,000 | $ 49,500,000 | $ 259,900,000 | ||||||||||||||||||||||||
| Debt Instrument Maturity Year | 2020 | ||||||||||||||||||||||||||
| Debt Instrument, Maturity Date | Apr. 01, 2020 | ||||||||||||||||||||||||||
| Debt Instrument, Effective Interest Rate | 6.08% | ||||||||||||||||||||||||||
| Senior Notes | 364,881,000 | 371,975,000 | |||||||||||||||||||||||||
| Debt, Fair Value | 244,714,000 | $ 270,938,000 | |||||||||||||||||||||||||
| Convertible One Point Five Percent Senior Notes Due Twenty Nineteen And Senior Notes Five Point Eight Seven Five Percent Due Twenty Twenty [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Instrument, Repurchase Amount | $ 54,100,000 | ||||||||||||||||||||||||||
| Extinguishment of Debt, Gain (Loss), Net of Tax | $ 10,500,000 | ||||||||||||||||||||||||||
| Extinguishment of Debt, Gain (Loss), Per Share, Net of Tax | $ / shares | $ 0.29 | ||||||||||||||||||||||||||
| Senior Notes 5.000 Percent Due 2021 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Interest Rate | 5.00% | 5.00% | |||||||||||||||||||||||||
| Deferred Finance Costs, Net | $ 3,142,000 | $ 4,111,000 | |||||||||||||||||||||||||
| Debt Instrument, Principal amount | 450,000,000 | 450,000,000 | |||||||||||||||||||||||||
| Debt Instrument Maturity Year | 2021 | ||||||||||||||||||||||||||
| Debt Instrument, Maturity Date | Mar. 01, 2021 | ||||||||||||||||||||||||||
| Senior Notes | 446,858,000 | 445,889,000 | |||||||||||||||||||||||||
| Debt, Fair Value | $ 236,250,000 | $ 301,343,000 | |||||||||||||||||||||||||
| Convertible 5.000 Percent Senior Notes Due 2021 [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Instrument, Principal amount | 450,000,000 | ||||||||||||||||||||||||||
| Proceeds from Issuance of Senior Long-term Debt | 442,400,000 | ||||||||||||||||||||||||||
| Repayments of Senior Debt | $ 252,700,000 | ||||||||||||||||||||||||||
| Percentage Of debt outstanding tendered | 6.00% | ||||||||||||||||||||||||||
| Debt Instrument, Effective Interest Rate | 5.21% | ||||||||||||||||||||||||||
| Convertible 1.500 Percent Senior Notes Due 2019 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Interest Rate | 1.50% | 1.50% | |||||||||||||||||||||||||
| Deferred Finance Costs, Net | $ 1,486,000 | $ 3,061,000 | |||||||||||||||||||||||||
| Debt Instrument, Principal amount | 300,000,000 | $ 300,000,000 | 99,647,000 | 300,000,000 | |||||||||||||||||||||||
| Proceeds from Issuance of Senior Long-term Debt | 266,000,000 | ||||||||||||||||||||||||||
| Debt Instrument, Exchanged Face Amount | $ 127,100,000 | ||||||||||||||||||||||||||
| Extinguishment of Debt, Amount | $ 73,300,000 | ||||||||||||||||||||||||||
| Debt Issuance Costs, Gross | $ 9,300,000 | $ 9,300,000 | |||||||||||||||||||||||||
| Debt Instrument Maturity Year | 2019 | ||||||||||||||||||||||||||
| Debt Instrument, Maturity Date | Sep. 01, 2019 | ||||||||||||||||||||||||||
| Debt Instrument, Effective Interest Rate | 6.23% | 6.23% | |||||||||||||||||||||||||
| Proceeds from Convertible Debt | $ 300,000,000 | ||||||||||||||||||||||||||
| Discount Rate Used To Determine Liability Fair Value | 5.75% | 5.75% | |||||||||||||||||||||||||
| Debt Instrument Convertible Carrying Amount Of Liability Component | $ 227,600,000 | $ 227,600,000 | |||||||||||||||||||||||||
| Debt Instrument, Convertible, Carrying Amount of Equity Component | 72,400,000 | 72,400,000 | |||||||||||||||||||||||||
| Debt Instrument Maturity Period | 7 years | ||||||||||||||||||||||||||
| Decrease In Additional Paid In Capital | $ 2,200,000 | ||||||||||||||||||||||||||
| Amortization Of Deferred Financing Costs To Interest Expense | $ 7,100,000 | ||||||||||||||||||||||||||
| Senior Notes | 91,527,000 | 265,846,000 | |||||||||||||||||||||||||
| Debt, Fair Value | $ 74,486,000 | $ 216,195,000 | |||||||||||||||||||||||||
| Convertible Senior Notes [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Proceeds from Convertible Debt | 290,800,000 | ||||||||||||||||||||||||||
| First Lien Credit Facility Number Of Vessels Used As Collateral [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| FirstLienCreditFacilityCollateralNumberOfVessels | 51 | ||||||||||||||||||||||||||
| First Lien Credit Facility Number Of Newbuild MPSVs Used As Collateral [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| FirstLienCreditFacilityCollateralNumberOfVessels | 2 | ||||||||||||||||||||||||||
| First Lien Credit Facility Unencumbered Low-Spec Domestic OSVs [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| First Lien Credit Facility Unencumbered Vessels | 10 | ||||||||||||||||||||||||||
| First Lien Credit Facility Unencumbered Foreign-Flagged OSVs [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| First Lien Credit Facility Unencumbered Vessels | 11 | ||||||||||||||||||||||||||
| Semi Annual Payment First Payment [Member] | Senior Notes 5.875 Percent Due 2020 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Instrument, Interest payable date | --04-01 | ||||||||||||||||||||||||||
| Semi Annual Payment First Payment [Member] | Senior Notes 5.000 Percent Due 2021 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Instrument, Interest payable date | --03-01 | ||||||||||||||||||||||||||
| Semi Annual Payment First Payment [Member] | Convertible 1.500 Percent Senior Notes Due 2019 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Instrument, Interest payable date | --03-01 | ||||||||||||||||||||||||||
| Semi Annual Payment Second Payment [Member] | Senior Notes 5.875 Percent Due 2020 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Instrument, Interest payable date | --10-01 | ||||||||||||||||||||||||||
| Semi Annual Payment Second Payment [Member] | Senior Notes 5.000 Percent Due 2021 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Instrument, Interest payable date | --09-01 | ||||||||||||||||||||||||||
| Semi Annual Payment Second Payment [Member] | Convertible 1.500 Percent Senior Notes Due 2019 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Instrument, Interest payable date | --09-01 | ||||||||||||||||||||||||||
| Warrant [Member] | Convertible 1.500 Percent Senior Notes Due 2019 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Principal Amount Senior Notes for conversion | 1,000 | 1,000 | |||||||||||||||||||||||||
| Debt Instrument Convertible Conversion Warrant Strike Price | $ / shares | $ 68.53 | ||||||||||||||||||||||||||
| Debt Instrument Convertible Conversion Premium | 75.00% | ||||||||||||||||||||||||||
| Conversion Condition Two [Member] | Convertible 1.500 Percent Senior Notes Due 2019 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Principal Amount Senior Notes for conversion | $ 1,000 | $ 1,000 | |||||||||||||||||||||||||
| Number Of Trading Days Whether Consecutive Or Not For First Condition Of Convertibility Of Notes | 5 days | ||||||||||||||||||||||||||
| Number of consecutive trading days used in conversion analysis | 10 days | ||||||||||||||||||||||||||
| Trading price per 1000 principal amount of notes, percent | 95.00% | ||||||||||||||||||||||||||
| Conversion Condition One [Member] | Convertible 1.500 Percent Senior Notes Due 2019 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Instrument Conversion Circumstance Percentage Stock Price Of Stock Conversion Threshold | 135.00% | ||||||||||||||||||||||||||
| Number of consecutive trading days used in conversion analysis | 30 days | ||||||||||||||||||||||||||
| Minimum | Conversion Condition One [Member] | Convertible 1.500 Percent Senior Notes Due 2019 | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Number Of Trading Days Whether Consecutive Or Not For First Condition Of Convertibility Of Notes | 20 days | ||||||||||||||||||||||||||
| Subsequent Event [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| First-Lien Credit Facility Covenant Minimum Delayed Draw Commitment | $ 204,700,000 | $ 136,000,000 | |||||||||||||||||||||||||
| Subsequent Event [Member] | First-Lien Credit Facility Maturing Twenty Twenty Three [Member] [Domain] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| First-Lien Credit Facility Redemption Premium | 101.00% | 102.00% | |||||||||||||||||||||||||
| Subsequent Event [Member] | First-Lien Credit Facility Maturing Twenty Twenty Three [Member] [Domain] | London Interbank Offered Rate (LIBOR) [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| First Lien Credit Facility Floor Interest Rate | 1.00% | ||||||||||||||||||||||||||
| FirstLienCreditFacilityBasisSpreadOnVariableRate | 7.25% | 7.00% | 6.50% | 6.00% | 7.50% | ||||||||||||||||||||||
| Subsequent Event [Member] | First-Lien Credit Facility Maturing Twenty Twenty Three [Member] [Domain] | Prime Rate [Member] | |||||||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| FirstLienCreditFacilityBasisSpreadOnVariableRate | 6.25% | 6.00% | 5.50% | 5.00% | 6.50% | ||||||||||||||||||||||
| X | ||||||||||
- Definition Amortization of deferred financing costs to interest expense No definition available.
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| X | ||||||||||
- Definition Debt Instrument Conversion Circumstance, Number of Consecutive Trading Days No definition available.
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| X | ||||||||||
- Definition Debt Instrument Conversion Circumstance Percentage Stock Price Of Stock Conversion Threshold No definition available.
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| X | ||||||||||
- Definition Debt Instrument, Convertible, Carrying Amount of The Liability Component No definition available.
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| X | ||||||||||
- Definition Debt Instrument, Convertible, Conversion Premium No definition available.
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| X | ||||||||||
- Definition Debt Instrument Convertible Conversion Warrant Strike Price No definition available.
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| X | ||||||||||
- Definition Debt Instrument Date Of Payment No definition available.
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| X | ||||||||||
- Definition Debt Instrument, Exchange Amount No definition available.
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| X | ||||||||||
- Definition Debt Instrument, Exchanged Face Amount No definition available.
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| X | ||||||||||
- Definition Debt Instrument Maturity Period No definition available.
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| X | ||||||||||
- Definition Debt Instrument Maturity Year No definition available.
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| X | ||||||||||
- Definition Decrease in Additional Paid in Capital No definition available.
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| X | ||||||||||
- Definition Discount Rate Used To Determine Liability Fair Value No definition available.
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| X | ||||||||||
- Definition FirstLienCreditFacilityBasisSpreadOnVariableRate No definition available.
|
| X | ||||||||||
- Definition FirstLienCreditFacilityCollateralNumberOfVessels No definition available.
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| X | ||||||||||
- Definition First-Lien Credit Facility Covenant Minimum Available Liquidity No definition available.
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| X | ||||||||||
- Definition First-Lien Credit Facility Covenant Minimum Delayed Draw Commitment No definition available.
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| X | ||||||||||
- Definition First-Lien Credit Facility Covenant Minimum Liquidity For Prepayment No definition available.
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| X | ||||||||||
- Definition First Lien Credit Facility, Current Borrowing Capacity No definition available.
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| X | ||||||||||
- Definition First Lien Credit Facility Floor Interest Rate No definition available.
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| X | ||||||||||
- Definition First-Lien Credit Facility Redemption Premium No definition available.
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| X | ||||||||||
- Definition First Lien Credit Facility Unencumbered Vessels No definition available.
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| X | ||||||||||
- Definition GainOnExchangeOfDebtInstrument No definition available.
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| X | ||||||||||
- Definition Market Price Per Share No definition available.
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| X | ||||||||||
- Definition Maximum Trading Price Percentage Of Product Of Last Reported Sale Price Of Common Stock And Conversion Rate On Each Trading Day Required For Second Condition Of Convertibility Of Notes No definition available.
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| X | ||||||||||
- Definition Number Of Trading Days Whether Consecutive Or Not For First Condition Of Convertibility Of Notes No definition available.
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| X | ||||||||||
- Definition Percentage of Notes Redeemed No definition available.
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| X | ||||||||||
- Definition Principal Amount Per Note Used in Conversion Rate No definition available.
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| X | ||||||||||
- Definition Purchase Of Convertible Note Hedges No definition available.
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| X | ||||||||||
- Definition Repurchase Price As Percentage Of Principal Amount Of Senior Notes No definition available.
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| X | ||||||||||
- Definition The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The price per share of the conversion feature embedded in the debt instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value amount of debt instrument that was repurchased. No definition available.
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- Definition Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Gross amount of debt extinguished. No definition available.
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| X | ||||||||||
- Definition The difference between the reacquisition price and the net carrying amount of the extinguished debt recognized currently as a component of income in the period of extinguishment, net of tax. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Per share impact of the gain (loss) on the extinguishment of debt, net of applicable taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of interest capitalized during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Stockholders' Equity - Additional Information (Detail) |
Jul. 01, 2013 |
Dec. 31, 2017
Right
shares
|
Dec. 31, 2016
shares
|
|---|---|---|---|
| Stockholders Equity Note [Line Items] | |||
| Preferred stock, shares authorized | shares | 5,000,000 | 5,000,000 | |
| Stockholder rights plan for each outstanding share of common stock | Right | 1 | ||
| Business days after public announcement | 10 days | ||
| Minimum | |||
| Stockholders Equity Note [Line Items] | |||
| Percentage of tender offer or exchange for rights to become exercisable | 10.00% |
| X | ||||||||||
- Definition Business days after public announcement No definition available.
|
| X | ||||||||||
- Definition Class Of Warrant Or Right Common Stock Exchange Ratio No definition available.
|
| X | ||||||||||
- Definition Outstanding Stock Percentage That Should be Acquired for Rights Issued to Become Exercisable No definition available.
|
| X | ||||||||||
- Definition Stockholders Equity Note [Line Items] No definition available.
|
| X | ||||||||||
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2011 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Cumulative Effect of New Accounting Principle in Period of Adoption | $ 3,200 | |||
| Income Tax Expense (benefit) | (150,244) | $ (45,506) | $ 39,757 | |
| Payments Related to Tax Withholding for Share-based Compensation | 575 | 450 | 1,252 | |
| Excess Tax Benefit from Share-based Compensation, Operating Activities | 1,900 | |||
| Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net | 600 | |||
| Proceeds from Stock Options Exercised | $ 0 | 0 | 100 | |
| Tax deduction (benefit), excess of compensation | 1,900 | 600 | ||
| Stock option expiration period from the date of grant | 10 years | |||
| Vesting Period (in years) | 3 years | |||
| Stock-based incentive compensation plan, maximum number of shares covered | 4,950,000 | |||
| Number of shares available for grants in future | 67,286 | |||
| Share-based Compensation | $ 6,999 | $ 9,983 | $ 10,293 | |
| Performance Shares | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Vesting Period (in years) | 3 years | |||
| Performance Shares | Minimum | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Percentage Thresholds For Potential Shares To Be Issued | 0.00% | |||
| Vesting Period (in years) | 1 year | |||
| Performance Shares | Maximum | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Percentage Thresholds For Potential Shares To Be Issued | 150.00% | 150.00% | 150.00% | |
| Vesting Period (in years) | 3 years | |||
| Time Based Restricted Stock Units (RSU) | Minimum | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Vesting Period (in years) | 1 year | |||
| Time Based Restricted Stock Units (RSU) | Maximum | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Vesting Period (in years) | 3 years | |||
| Restricted Stock Awards | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Unamortized stock based compensation expense | $ 2,500 | |||
| Unamortized stock based compensation expense, recognition period | 1 year 2 months 24 days | |||
| Share-based Compensation | $ 5,800 | $ 6,800 | $ 9,300 | |
| Phantom Share Units (PSUs) | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Vesting Period (in years) | 3 years | |||
| Unamortized stock based compensation expense | $ 3,000 | |||
| Unamortized stock based compensation expense, recognition period | 1 year 6 months 27 days | |||
| Share-based Compensation | $ 900 | 2,600 | (200) | |
| Employee Stock Purchase Plan | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Stock-based incentive compensation plan, maximum number of shares covered | 2,200,000 | |||
| Share Based Compensation Arrangements By Share Based Payment Award Discount From Market Price | 15.00% | |||
| Number of shares available for grants in future | 902,260 | |||
| Share-based Compensation | $ 200 | $ 600 | $ 1,200 | |
| Deferred Compensation, Share-based Payments [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Income Tax Expense (benefit) | $ 1,900 | |||
| X | ||||||||||
- Definition Percentage Thresholds For Potential Shares To Be Issued No definition available.
|
| X | ||||||||||
- Definition Share Based Compensation Arrangement by Share Based Payment Award, Options, Expiration Term No definition available.
|
| X | ||||||||||
- Definition Share Based Compensation Arrangements By Share Based Payment Award Discount From Market Price No definition available.
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| X | ||||||||||
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. No definition available.
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| X | ||||||||||
- Definition Unrecognized cost of unvested share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Stock-Based Compensation - Financial Impact of Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Allocated Share-based Compensation Expense | $ 6,999 | $ 9,983 | $ 10,293 |
| Net income | $ 4,712 | $ 5,829 | $ 6,454 |
| Earnings per common share: | |||
| Basic (usd per share) | 0.13 | 0.16 | 0.18 |
| Diluted (usd per share) | 0.13 | 0.16 | 0.18 |
| X | ||||||||||
- Definition Allocated Share-based Compensation Expense, Earnings Per Common Share Basic No definition available.
|
| X | ||||||||||
- Definition Allocated Share-based Compensation Expense, Earnings Per Common Share Diluted No definition available.
|
| X | ||||||||||
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. No definition available.
|
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Number of Shares | ||||
| Options outstanding at Beginning of Year | 185 | 304 | 345 | |
| Grants | 0 | 0 | 0 | |
| Exercised | 0 | 0 | (1) | |
| Forfeited or expired | 0 | 119 | 40 | |
| Options outstanding at End of Year | 185 | 185 | 304 | 345 |
| Exercisable options outstanding | 185 | 185 | 304 | |
| Weighted Average Exercise Price | ||||
| Options outstanding at Beginning of Year | $ 24.86 | $ 28.11 | $ 27.98 | |
| Grants | 0 | 0 | 0 | |
| Exercised | 0.00 | 0.00 | 22.28 | |
| Forfeited or expired | 0.00 | 33.15 | 27.27 | |
| Options outstanding at End of Year | 24.86 | 24.86 | 28.11 | $ 27.98 |
| Exercisable options outstanding | $ 24.86 | $ 24.86 | $ 28.11 | |
| ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsinPeriodWeightedAverageRemainingContractualTerm(Years) | 0 years | |||
| Share Based Compensation Arrangement By Share Based Payment Award Nonvested Options Granted In Period Weighted Average Remaining Contractual Term (Years) | 0 years | 0 years | 0 years | |
| Weighted Average Remaining Contractual Term (years) | ||||
| Options outstanding at Beginning of Year | 3 years 1 month 12 days | 4 years 1 month 12 days | 3 years 2 months 12 days | 3 years 8 months 12 days |
| Options outstanding at End of Year | 3 years 1 month 12 days | 4 years 1 month 12 days | 3 years 2 months 12 days | 3 years 8 months 12 days |
| Exercisable options outstanding | 3 years 1 month 12 days | 4 years 1 month 12 days | 3 years 2 months 12 days | |
| Aggregate Intrinsic Value | ||||
| Options outstanding at Beginning of Year | $ 0 | $ 0 | $ 59 | |
| Grants | 0 | 0 | 0 | |
| Exercised | 0 | 0 | 2 | |
| Options outstanding at End of Year | 0 | 0 | 0 | $ 59 |
| Exercisable options outstanding | $ 0 | $ 0 | $ 0 | |
| X | ||||||||||
- Definition ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsGrantedInPeriodWeightedAverageRemainingContractualTerm(Years) No definition available.
|
| X | ||||||||||
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] No definition available.
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| X | ||||||||||
- Definition ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsinPeriodWeightedAverageRemainingContractualTerm(Years) No definition available.
|
| X | ||||||||||
- Definition The total dollar intrinsic value of the underlying options granted during the year. No definition available.
|
| X | ||||||||||
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Abstract] No definition available.
|
| X | ||||||||||
- Definition Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term 3 No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
|
| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
|
| X | ||||||||||
- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Stock-Based Compensation - Summary of Nonvested Stock Option Activity (Detail) - $ / shares shares in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsinPeriodWeightedAverageRemainingContractualTerm(Years) | 0 years | |||
| Change In Estimated Payout of Performance Unit Awards | 20 | (95) | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period | (180) | (15) | (117) | |
| Weighted-Average Grant-Date Fair Value | ||||
| Change In Estimated Payout of Performance Unit Awards, Weighted Average Fair Value Per Share | $ 21.84 | $ 27.52 | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | $ 11.65 | $ 34.32 | $ 37.25 | |
| Restricted Stock [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested | 868 | 820 | 726 | 590 |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 615 | 537 | 479 | |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Cancelled In Period | 0 | 0 | (104) | |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period | (587) | (348) | (239) | |
| Weighted-Average Grant-Date Fair Value | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ 10.76 | $ 17.72 | $ 30.12 | $ 37.13 |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | 5.57 | 6.44 | 21.40 | |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Cancelled And Forfeited In Period Weighted Average Grant Date Fair Value | 0.00 | 0.00 | 21.84 | |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | $ 15.39 | $ 23.50 | $ 33.60 | |
| X | ||||||||||
- Definition Change In Estimated Payout of Performance Unit Awards No definition available.
|
| X | ||||||||||
- Definition Change In Estimated Payout of Performance Unit Awards, Weighted Average Fair Value Per Share No definition available.
|
| X | ||||||||||
- Definition Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Cancelled and Forfeited in Period, Weighted Average Grant Date Fair Value No definition available.
|
| X | ||||||||||
- Definition Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Cancelled in Period No definition available.
|
| X | ||||||||||
- Definition ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsinPeriodWeightedAverageRemainingContractualTerm(Years) No definition available.
|
| X | ||||||||||
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Details
|
Stock-Based Compensation - Summary of Restricted Stock Award Activity (Detail) - $ / shares shares in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Number of Shares | |||
| Change In Estimated Payout of Performance Unit Awards | 20 | (95) | |
| Vested | (180) | (15) | (117) |
| Weighted Avg. Fair Value Per Share | |||
| Change In Estimated Payout of Performance Unit Awards, Weighted Average Fair Value Per Share | $ 21.84 | $ 27.52 | |
| Vested | $ 11.65 | $ 34.32 | $ 37.25 |
| Restricted Stock | |||
| Number of Shares | |||
| Restricted stock awards at Beginning of Year | 820 | 726 | 590 |
| Granted during the period | 615 | 537 | 479 |
| Cancellations during the period | 0 | 0 | (104) |
| Vested | (587) | (348) | (239) |
| Outstanding, at End of Year | 868 | 820 | 726 |
| Weighted Avg. Fair Value Per Share | |||
| Restricted stock awards at Beginning of Year | $ 17.72 | $ 30.12 | $ 37.13 |
| Granted during the period | 5.57 | 6.44 | 21.40 |
| Cancellations during the period | 0.00 | 0.00 | 21.84 |
| Vested | 15.39 | 23.50 | 33.60 |
| Outstanding, at End of Year | $ 10.76 | $ 17.72 | $ 30.12 |
| Phantom Share Units (PSUs) | |||
| Number of Shares | |||
| Restricted stock awards at Beginning of Year | 1,053 | 82 | 153 |
| Granted during the period | 919 | 991 | 47 |
| Cancellations during the period | (4) | (5) | (1) |
| Outstanding, at End of Year | 1,788 | 1,053 | 82 |
| Weighted Avg. Fair Value Per Share | |||
| Restricted stock awards at Beginning of Year | $ 7.60 | $ 30.61 | $ 38.43 |
| Granted during the period | 6.68 | 6.14 | 21.84 |
| Cancellations during the period | 15.31 | 19.05 | 30.87 |
| Outstanding, at End of Year | $ 6.70 | $ 7.60 | $ 30.61 |
| X | ||||||||||
- Definition Change In Estimated Payout of Performance Unit Awards No definition available.
|
| X | ||||||||||
- Definition Change In Estimated Payout of Performance Unit Awards, Weighted Average Fair Value Per Share No definition available.
|
| X | ||||||||||
- Definition Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Cancelled and Forfeited in Period, Weighted Average Grant Date Fair Value No definition available.
|
| X | ||||||||||
- Definition Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Cancelled in Period No definition available.
|
| X | ||||||||||
- Definition Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Weighted Average Grant Date Fair Value [Abstract] No definition available.
|
| X | ||||||||||
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Stock-Based Compensation - Summary of Weighted Average Assumptions and Fair Value of Options under ESPP (Detail) - Employee Stock Purchase Plan - $ / shares |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Dividend yield | 0.00% | 0.00% |
| Expected volatility | 93.20% | 91.60% |
| Risk-free interest rate | 1.335% | 0.49% |
| Expected term (months) | 6 months | 6 months |
| Weighted-average grant-date fair value per share | $ 1.16 | $ 3.14 |
| X | ||||||||||
- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
Income Taxes - Components of Long Term Deferred Tax Liabilities Net (Detail) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|---|
| Deferred tax liabilities: | |||
| Fixed assets | $ 323,548 | $ 490,221 | $ 472,817 |
| Deferred charges and other liabilities | 6,266 | 10,908 | 11,317 |
| Deferred Tax Liabilities, Gross, Noncurrent | 329,814 | 501,129 | 484,134 |
| Deferred tax assets: | |||
| Net operating loss carryforwards | (122,682) | (111,147) | (52,374) |
| Allowance for doubtful accounts | (1,362) | (763) | (1,036) |
| Stock-based compensation expense | (1,823) | (4,033) | (4,830) |
| DeferredTaxAssets,TaxDeferredExpense,ConvertibleDebt | (8,265) | 0 | 0 |
| Alternative minimum tax credit carryforward | (10,431) | (20,863) | (20,863) |
| Foreign tax credit carryforward | (18,711) | (17,554) | (17,972) |
| Other | (4,501) | (6,044) | (5,440) |
| Total deferred tax assets | (167,775) | (160,404) | (102,515) |
| Valuation allowance | 35,426 | 2,295 | 0 |
| Deferred tax liabilities, net | |||
| Total deferred tax liabilities | $ 197,465 | $ 343,020 | $ 381,619 |
| X | ||||||||||
- Definition Deferred Tax Assets, Tax Deferred Expense, Convertible Debt No definition available.
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences from capitalized costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Gross amount of noncurrent deferred tax liabilities, which result from applying the applicable tax rate to taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Income Taxes [Line Items] | ||||
| Federal tax operating loss carryforwards, net | $ 465,100 | $ 465,100 | ||
| Foreign tax credit carryforward | 18,500 | 18,500 | ||
| State tax operating loss carryforwards, net | 132,200 | 132,200 | ||
| Valuation Allowance, Deferred Tax Asset, Change in Amount | $ 33,100 | $ 2,295 | $ (1,011) | |
| Federal statutory rate | 35.00% | |||
| Effective Income Tax Rate Reconciliation Income Excluded from U.S. Taxable Income | $ 0 | (9,478) | 0 | |
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | 125,225 | (125,225) | $ 0 | $ 0 |
| Valuation Allowances and Reserves, Balance | 35,400 | $ 35,400 | ||
| Internal Revenue Service (IRS) | Minimum | ||||
| Income Taxes [Line Items] | ||||
| Operating loss carry forward, expiration year | 2031 | |||
| Internal Revenue Service (IRS) | Maximum | ||||
| Income Taxes [Line Items] | ||||
| Operating loss carry forward, expiration year | 2037 | |||
| Foreign markets | Minimum | ||||
| Income Taxes [Line Items] | ||||
| Tax credit carry forward, expiration year | 2019 | |||
| Foreign markets | Maximum | ||||
| Income Taxes [Line Items] | ||||
| Tax credit carry forward, expiration year | 2027 | |||
| State and Local Jurisdiction | Minimum | ||||
| Income Taxes [Line Items] | ||||
| Operating loss carry forward, expiration year | 2030 | |||
| State and Local Jurisdiction | Maximum | ||||
| Income Taxes [Line Items] | ||||
| Operating loss carry forward, expiration year | 2037 | |||
| BRAZIL | ||||
| Income Taxes [Line Items] | ||||
| Deferred Tax Assets, Operating Loss Carryforwards, Foreign | 37,800 | $ 37,800 | ||
| MEXICO | ||||
| Income Taxes [Line Items] | ||||
| Deferred Tax Assets, Operating Loss Carryforwards, Foreign | $ 14,500 | $ 14,500 | ||
| X | ||||||||||
- Definition Deferred Tax Operating Loss Carryforwards, Expiration Year No definition available.
|
| X | ||||||||||
- Definition Effective Income Tax Rate Reconciliation Income Excluded from U.S. Taxable Income No definition available.
|
| X | ||||||||||
- Definition Income Taxes [Line Items] No definition available.
|
| X | ||||||||||
- Definition Tax Credit Carryforward, Expiration Year No definition available.
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Income Taxes - Components of Income Tax Expenses (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] | |||
| U.S. and State | $ (9,743) | $ 709 | $ 0 |
| Foreign | 1,024 | (257) | 5,671 |
| Total current tax expense | (8,719) | 452 | 5,671 |
| U.S. and State | (142,136) | (45,958) | 34,086 |
| Deferred Foreign Income Tax Expense (Benefit) | 611 | 0 | 0 |
| Deferred Income Tax Expense (Benefit) | (141,525) | (45,958) | 34,086 |
| Total tax expense (benefit) | $ (150,244) | $ (45,506) | $ 39,757 |
| X | ||||||||||
- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Income Taxes - Income (Loss) Before Income Taxes Based on Jurisdiction Earned (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Income Taxes [Line Items] | |||
| U.S. | $ (105,692) | $ (93,704) | $ 65,894 |
| Foreign | (17,131) | (15,648) | 40,684 |
| Income (Loss) before Income Taxes | $ (122,823) | $ (109,352) | $ 106,578 |
| X | ||||||||||
- Definition Income Taxes [Line Items] No definition available.
|
| X | ||||||||||
- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Income Taxes - Reconciliation of Difference Between Company's Income Tax Provision Calculated at Federal Statutory Rate and Actual Income Tax Provision (Detail) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Reconciliation of Provision of Income Taxes [Line Items] | ||||
| Statutory rate | $ (42,988) | $ (38,274) | $ 37,302 | |
| State taxes, net | (1,228) | (1,094) | 1,066 | |
| Non-deductible expense | 3,488 | 1,070 | 1,440 | |
| Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | 15,118 | |||
| Valuation Allowance, Deferred Tax Asset, Change in Amount | 33,100 | 2,295 | (1,011) | |
| Effective Income Tax Rate Reconciliation Income Excluded from U.S. Taxable Income | 0 | (9,478) | 0 | |
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 125,225 | (125,225) | 0 | 0 |
| Foreign taxes and other | 591 | (25) | 960 | |
| Total tax expense (benefit) | $ (150,244) | $ (45,506) | $ 39,757 | |
| X | ||||||||||
- Definition Effective Income Tax Rate Reconciliation Income Excluded from U.S. Taxable Income No definition available.
|
| X | ||||||||||
- Definition Reconciliation of Provision of Income Taxes [Line Items] No definition available.
|
| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Commitments and Contingencies - Additional Information (Detail) $ in Millions |
1 Months Ended | 6 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|
|
Nov. 30, 2011
Vessel
Shipyard
|
Jun. 30, 2013 |
Dec. 31, 2017
USD ($)
Vessel
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2013
Vessel
|
Jun. 30, 2012
Contract
|
|
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Aggregate cost of OSV newbuild program excluding construction period interest | $ 1,335.0 | ||||||
| Cost incurred on OSV newbuild program | $ 1,272.7 | ||||||
| Percentage of total project cost | 95.30% | ||||||
| Operating leases rent expense | $ 3.9 | $ 4.0 | $ 4.1 | ||||
| Covington facility lease | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Lease expiration date | 2025-09 | ||||||
| Number of lease renewal options | Contract | 3 | ||||||
| Operating lease, renewal option term | 5 years | ||||||
| New facility lease | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Operating lease, remaining term | 1 year | ||||||
| Importation assessment | Brazil | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Number of Vessels operating in Brazil | Vessel | 4 | ||||||
| Newbuild program 5 | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Number Of Construction Shipyards, Domestic | Shipyard | 3 | ||||||
| Number of Vessels Placed in Service | Vessel | 22 | ||||||
| Number Of Vessels | Vessel | 24 | 2 | |||||
| Aggregate cost of OSV newbuild program excluding construction period interest | $ 1,335.0 | ||||||
| Cost incurred on OSV newbuild program | $ 1,272.7 | ||||||
| Percentage of total project cost | 95.30% | ||||||
| Newbuild program 5 | Offshore Supply Vessel Class 300 | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Number of vessels to be constructed | Vessel | 4 | ||||||
| Newbuild program 5 | Offshore Supply Vessel Class 310 | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Number of vessels to be constructed | Vessel | 5 | ||||||
| Newbuild program 5 | Offshore Supply Vessel Class 320 | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Number of vessels to be constructed | Vessel | 10 | ||||||
| Newbuild program 5 | Multi Purpose Supply Vessel Class 310 | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Number of vessels to be constructed | Vessel | 3 | ||||||
| Newbuild program 5 | Multi Purpose Supply Vessel Class 400 | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Number of vessels to be constructed | Vessel | 2 | ||||||
| ATP Oil and Gas, Inc [Member] | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Amount owed by ATP | $ 4.8 | ||||||
| Amount owed by ATP, reserves | 4.8 | ||||||
| Minimum | Importation assessment | Brazil | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Loss Contingency, Estimate of Possible Loss | 0.5 | ||||||
| Maximum | Importation assessment | Brazil | |||||||
| Commitments and Contingencies Disclosure [Line Items] | |||||||
| Loss Contingency, Estimate of Possible Loss | $ 1.0 | ||||||
| X | ||||||||||
- Definition Commitments and Contingencies Disclosure [Line Items] No definition available.
|
| X | ||||||||||
- Definition Costs Incurred for Offshore Supply Vessels Newbuild Program Net of Capitalized Interest No definition available.
|
| X | ||||||||||
- Definition Estimated Construction Cost No definition available.
|
| X | ||||||||||
- Definition Lease Expiration, Month and Year No definition available.
|
| X | ||||||||||
- Definition Loss Contingency, Estimate of Possible Loss, Related Reserves No definition available.
|
| X | ||||||||||
- Definition Number Of Construction Shipyards, Domestic No definition available.
|
| X | ||||||||||
- Definition Number Of Renewal Options No definition available.
|
| X | ||||||||||
- Definition Number Of Vessels No definition available.
|
| X | ||||||||||
- Definition Number of vessels to be constructed No definition available.
|
| X | ||||||||||
- Definition Number of Vessels Placed in Service No definition available.
|
| X | ||||||||||
- Definition Number of Vessels operating in Brazil No definition available.
|
| X | ||||||||||
- Definition Optional Lease Term No definition available.
|
| X | ||||||||||
- Definition Percentage of Total Project cost No definition available.
|
| X | ||||||||||
- Definition Remaining Lease Term No definition available.
|
| X | ||||||||||
- Definition Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Commitments and Contingencies - Future Minimum Payments Under Noncancelable Leases (Detail) $ in Thousands |
Dec. 31, 2017
USD ($)
|
|---|---|
| Operating Leased Assets [Line Items] | |
| 2017 | $ 2,959 |
| 2018 | 2,449 |
| 2019 | 2,449 |
| 2020 | 2,478 |
| 2021 | 2,572 |
| Thereafter | 21,183 |
| Total | $ 34,090 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Deferred Charges (Detail) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items] | ||
| Deferred drydocking costs, net of accumulated amortization of $41,784 and $38,429 respectively | $ 10,282 | $ 13,808 |
| Prepaid lease expense, net of amortization of $1,542 and $1,384 respectively | 2,530 | 2,688 |
| Debt Issuance Costs, Line of Credit Arrangements, Net | 0 | 2,581 |
| Total | $ 12,812 | $ 19,077 |
| X | ||||||||||
- Definition Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items] No definition available.
|
| X | ||||||||||
- Definition Deferred drydocking costs, Net No definition available.
|
| X | ||||||||||
- Definition Amount, after accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Sum of the carrying amounts of deferred costs that are expected to be recognized as a charge against earnings in periods after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition This element represents costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction. This element is net of accumulated amortization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Deferred Charges (Additional Information) (Detail) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Jun. 15, 2017 |
Dec. 31, 2016 |
|---|---|---|---|
| Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items] | |||
| Deferred financing costs, accumulated amortization | $ 0 | $ 349 | |
| Deferred drydocking costs, accumulated amortization | 14,495 | 34,313 | |
| Prepaid lease expense, net of amortization | $ 1,858 | $ 1,700 | |
| Revolving Credit Facility [Member] | |||
| Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items] | |||
| Line of Credit Facility, Current Borrowing Capacity | $ 200,000 |
| X | ||||||||||
- Definition Accumulated Amortization, Deferred drydocking cost No definition available.
|
| X | ||||||||||
- Definition Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items] No definition available.
|
| X | ||||||||||
- Definition Amount of accumulated amortization of debt issuance costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition For an unclassified balance sheet, the accumulated amortization, as of the reporting date, which represents the periodic charge to earnings of initial direct costs which have been deferred and are being allocated over the lease term in proportion to the recognition of rental income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
Other Accrued Liabilities (Details) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Accrued Liabilities, Current [Abstract] | ||
| Accrued Rent | $ 5,142 | $ 4,763 |
| Deferred Revenue | 460 | 2,245 |
| Other Accrued Liabilities | 2,855 | 3,002 |
| Other Accrued Liabilities, Current | $ 8,457 | $ 10,010 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of expenses incurred but not yet paid classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Major Customers - Revenues from Customer Exceeding 10% (Detail) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Customer A | |||
| Revenue, Major Customer [Line Items] | |||
| Percentage of total revenue by customer | 20.00% | 13.00% | |
| Customer B | |||
| Revenue, Major Customer [Line Items] | |||
| Percentage of total revenue by customer | 19.00% | 15.00% | |
| Customer C | |||
| Revenue, Major Customer [Line Items] | |||
| Percentage of total revenue by customer | 11.00% | 21.00% | 20.00% |
| Customer D | |||
| Revenue, Major Customer [Line Items] | |||
| Percentage of total revenue by customer | 10.00% | ||
| X | ||||||||||
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Employment Agreements - Additional Information (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2017 | |
| Compensation Plan [Line Items] | |
| Expiration date of employment agreements with certain members of executive management team | Dec. 31, 2020 |
| X | ||||||||||
- Definition Compensation Plan [Line Items] No definition available.
|
| X | ||||||||||
- Definition Employment Agreements Expiration Date No definition available.
|
Condensed Consolidating Guarantor Financial Information (Details) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|---|---|
| Condensed Balance Sheet Statements, Captions [Line Items] | ||||
| Cash and cash equivalents | $ 186,849 | $ 217,027 | $ 259,801 | $ 185,123 |
| Accounts Receivable, Net, Current | 44,702 | 36,550 | ||
| Other Assets, Current | 16,890 | 16,978 | ||
| Assets, Current | 248,441 | 270,555 | ||
| Property, plant and equipment, net | 2,501,013 | 2,578,388 | ||
| Deferred costs, Noncurrent | 12,812 | 19,077 | ||
| Due from Related Parties, Noncurrent | 0 | 0 | ||
| Equity Method Investments | 0 | 0 | ||
| Other assets, Noncurrent | 6,612 | 10,255 | ||
| Assets | 2,768,878 | 2,878,275 | ||
| Accounts payable, Current | 16,196 | 11,774 | ||
| Interest Payable, Current | 14,734 | 14,763 | ||
| Employee-related Liabilities, Current | 9,475 | 8,596 | ||
| Other accrued liabilities, Current | 8,457 | 10,010 | ||
| Total current liabilities | 48,862 | 45,143 | ||
| Long-term debt, Excluding Current Maturities | 1,080,826 | 1,083,710 | ||
| Deferred Tax Liabilities, Net, Noncurrent | 197,465 | 343,020 | ||
| Due to Related Parties | 0 | 0 | ||
| Other Liabilities, Noncurrent | 3,801 | 3,406 | ||
| Liabilities | 1,330,954 | 1,475,279 | ||
| Preferred stock, Value, Issued | 0 | 0 | ||
| Common stock, Value, Issued | 371 | 365 | ||
| Additional paid-in capital | 760,278 | 754,394 | ||
| Retained earnings (Accumulated Deficit) | 668,598 | 637,992 | ||
| Accumulated Other Comprehensive Income (Loss), Net of Tax | 8,677 | 10,245 | ||
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 1,437,924 | 1,402,996 | ||
| Liabilities and Equity | 2,768,878 | 2,878,275 | ||
| Consolidation, Eliminations [Member] | ||||
| Condensed Balance Sheet Statements, Captions [Line Items] | ||||
| Cash and cash equivalents | 0 | 0 | 0 | |
| Accounts Receivable, Net, Current | 0 | 0 | ||
| Other Assets, Current | 0 | 0 | ||
| Assets, Current | 0 | 0 | ||
| Property, plant and equipment, net | 0 | 0 | ||
| Deferred costs, Noncurrent | 0 | 0 | ||
| Due from Related Parties, Noncurrent | (2,467,076) | (2,567,573) | ||
| Equity Method Investments | (799,336) | (773,037) | ||
| Other assets, Noncurrent | 0 | 0 | ||
| Assets | (3,266,412) | (3,340,610) | ||
| Accounts payable, Current | 0 | 0 | ||
| Interest Payable, Current | 0 | 0 | ||
| Employee-related Liabilities, Current | 0 | 0 | ||
| Other accrued liabilities, Current | 0 | 0 | ||
| Total current liabilities | 0 | 0 | ||
| Long-term debt, Excluding Current Maturities | 0 | 0 | ||
| Deferred Tax Liabilities, Net, Noncurrent | 0 | 0 | ||
| Due to Related Parties | (2,571,028) | (2,571,891) | ||
| Other Liabilities, Noncurrent | 0 | 0 | ||
| Liabilities | (2,571,028) | (2,571,891) | ||
| Preferred stock, Value, Issued | 0 | 0 | ||
| Common stock, Value, Issued | 0 | 0 | ||
| Additional paid-in capital | (44,989) | (42,297) | ||
| Retained earnings (Accumulated Deficit) | (650,395) | (726,422) | ||
| Accumulated Other Comprehensive Income (Loss), Net of Tax | 0 | 0 | ||
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | (695,384) | (768,719) | ||
| Liabilities and Equity | (3,266,412) | (3,340,610) | ||
| Parent Company [Member] | ||||
| Condensed Balance Sheet Statements, Captions [Line Items] | ||||
| Cash and cash equivalents | 4 | 9 | 10 | |
| Accounts Receivable, Net, Current | 0 | 0 | ||
| Other Assets, Current | 29 | 15 | ||
| Assets, Current | 33 | 24 | ||
| Property, plant and equipment, net | 0 | 0 | ||
| Deferred costs, Noncurrent | 0 | 2,581 | ||
| Due from Related Parties, Noncurrent | 1,778,711 | 1,779,872 | ||
| Equity Method Investments | 790,734 | 768,718 | ||
| Other assets, Noncurrent | 0 | 1,744 | ||
| Assets | 2,569,478 | 2,552,939 | ||
| Accounts payable, Current | 0 | 0 | ||
| Interest Payable, Current | 14,734 | 14,763 | ||
| Employee-related Liabilities, Current | 0 | 0 | ||
| Other accrued liabilities, Current | 0 | 0 | ||
| Total current liabilities | 14,734 | 14,763 | ||
| Long-term debt, Excluding Current Maturities | 1,080,826 | 1,083,710 | ||
| Deferred Tax Liabilities, Net, Noncurrent | 0 | 0 | ||
| Due to Related Parties | 140,019 | 61,715 | ||
| Other Liabilities, Noncurrent | 0 | 0 | ||
| Liabilities | 1,235,579 | 1,160,188 | ||
| Preferred stock, Value, Issued | 0 | 0 | ||
| Common stock, Value, Issued | 371 | 365 | ||
| Additional paid-in capital | 758,690 | 754,394 | ||
| Retained earnings (Accumulated Deficit) | 574,838 | 637,992 | ||
| Accumulated Other Comprehensive Income (Loss), Net of Tax | 0 | 0 | ||
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 1,333,899 | 1,392,751 | ||
| Liabilities and Equity | 2,569,478 | 2,552,939 | ||
| Guarantor Subsidiaries [Member] | ||||
| Condensed Balance Sheet Statements, Captions [Line Items] | ||||
| Cash and cash equivalents | 178,746 | 212,196 | 252,651 | |
| Accounts Receivable, Net, Current | 40,407 | 30,846 | ||
| Other Assets, Current | 16,051 | 16,176 | ||
| Assets, Current | 235,204 | 259,218 | ||
| Property, plant and equipment, net | 2,379,097 | 2,449,473 | ||
| Deferred costs, Noncurrent | 11,408 | 15,724 | ||
| Due from Related Parties, Noncurrent | 648,920 | 680,663 | ||
| Equity Method Investments | 8,602 | 8,602 | ||
| Other assets, Noncurrent | 5,984 | 6,239 | ||
| Assets | 3,289,215 | 3,419,919 | ||
| Accounts payable, Current | 15,643 | 11,325 | ||
| Interest Payable, Current | 0 | 0 | ||
| Employee-related Liabilities, Current | 8,458 | 8,104 | ||
| Other accrued liabilities, Current | 8,129 | 8,463 | ||
| Total current liabilities | 32,230 | 27,892 | ||
| Long-term debt, Excluding Current Maturities | 0 | 0 | ||
| Deferred Tax Liabilities, Net, Noncurrent | 192,793 | 337,503 | ||
| Due to Related Parties | 2,240,832 | 2,264,900 | ||
| Other Liabilities, Noncurrent | 3,802 | 3,416 | ||
| Liabilities | 2,469,657 | 2,633,711 | ||
| Preferred stock, Value, Issued | 0 | 0 | ||
| Common stock, Value, Issued | 0 | 0 | ||
| Additional paid-in capital | 37,975 | 37,978 | ||
| Retained earnings (Accumulated Deficit) | 781,583 | 748,080 | ||
| Accumulated Other Comprehensive Income (Loss), Net of Tax | 0 | 150 | ||
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 819,558 | 786,208 | ||
| Liabilities and Equity | 3,289,215 | 3,419,919 | ||
| Non-Guarantor Subsidiaries [Member] | ||||
| Condensed Balance Sheet Statements, Captions [Line Items] | ||||
| Cash and cash equivalents | 8,099 | 4,822 | $ 7,140 | |
| Accounts Receivable, Net, Current | 4,295 | 5,704 | ||
| Other Assets, Current | 810 | 787 | ||
| Assets, Current | 13,204 | 11,313 | ||
| Property, plant and equipment, net | 121,916 | 128,915 | ||
| Deferred costs, Noncurrent | 1,404 | 772 | ||
| Due from Related Parties, Noncurrent | 39,445 | 107,038 | ||
| Equity Method Investments | 0 | (4,283) | ||
| Other assets, Noncurrent | 628 | 2,272 | ||
| Assets | 176,597 | 246,027 | ||
| Accounts payable, Current | 553 | 449 | ||
| Interest Payable, Current | 0 | 0 | ||
| Employee-related Liabilities, Current | 1,017 | 492 | ||
| Other accrued liabilities, Current | 328 | 1,547 | ||
| Total current liabilities | 1,898 | 2,488 | ||
| Long-term debt, Excluding Current Maturities | 0 | 0 | ||
| Deferred Tax Liabilities, Net, Noncurrent | 4,672 | 5,517 | ||
| Due to Related Parties | 190,177 | 245,276 | ||
| Other Liabilities, Noncurrent | (1) | (10) | ||
| Liabilities | 196,746 | 253,271 | ||
| Preferred stock, Value, Issued | 0 | 0 | ||
| Common stock, Value, Issued | 0 | 0 | ||
| Additional paid-in capital | 8,602 | 4,319 | ||
| Retained earnings (Accumulated Deficit) | (37,428) | (21,658) | ||
| Accumulated Other Comprehensive Income (Loss), Net of Tax | 8,677 | 10,095 | ||
| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | (20,149) | (7,244) | ||
| Liabilities and Equity | $ 176,597 | $ 246,027 |
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Sum of the carrying amounts of deferred costs that are expected to be recognized as a charge against earnings in periods after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due after one year (or one business cycle). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of obligations due all related parties. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of current assets classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of noncurrent assets classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Condensed Consolidating Guarantor Financial Information Condensed Consolidating Statement of Operations (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
[1],[2] | Sep. 30, 2017 |
[1],[2] | Jun. 30, 2017 |
[1],[2] | Mar. 31, 2017 |
[1],[2] | Dec. 31, 2016 |
[2] | Sep. 30, 2016 |
[2] | Jun. 30, 2016 |
[2] | Mar. 31, 2016 |
[2] | Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2013 |
Dec. 31, 2012 |
|||||||
| Condensed Income Statements, Captions [Line Items] | |||||||||||||||||||||||||||
| Revenues | $ 56,241,000 | $ 53,666,000 | $ 37,426,000 | $ 44,079,000 | $ 41,879,000 | $ 51,927,000 | $ 53,673,000 | $ 76,820,000 | $ 191,412,000 | $ 224,299,000 | $ 476,070,000 | ||||||||||||||||
| Operating Costs and Expenses | 120,537,000 | 131,658,000 | 219,260,000 | ||||||||||||||||||||||||
| Depreciation | 98,733,000 | 93,071,000 | 82,566,000 | ||||||||||||||||||||||||
| Amortization of Deferred Charges | 13,168,000 | 20,485,000 | 26,463,000 | ||||||||||||||||||||||||
| General and Administrative Expense | 47,597,000 | 43,358,000 | 48,297,000 | ||||||||||||||||||||||||
| Costs and Expenses | 280,035,000 | 288,572,000 | 376,586,000 | ||||||||||||||||||||||||
| (Gain) loss on sale of assets | (121,000) | 54,000 | 44,060,000 | ||||||||||||||||||||||||
| Operating Income (Loss) | $ (14,278,000) | $ (16,667,000) | $ (31,318,000) | $ (26,481,000) | $ (27,484,000) | $ (14,445,000) | [3] | $ (21,510,000) | $ (780,000) | [3] | (88,744,000) | (64,219,000) | 143,544,000 | ||||||||||||||
| Gain on early extinguishment of debt | 15,478,000 | 0 | 0 | $ (25,800,000) | $ (6,000,000) | ||||||||||||||||||||||
| Investment Income, Interest | 2,203,000 | 1,490,000 | 1,525,000 | ||||||||||||||||||||||||
| Interest Expense | (51,364,000) | (48,675,000) | (39,496,000) | ||||||||||||||||||||||||
| EquityinEarningsofConsolidatedSubsidiaries | 0 | 0 | 0 | ||||||||||||||||||||||||
| Other Nonoperating Income (Expense) | (396,000) | 2,052,000 | 1,005,000 | ||||||||||||||||||||||||
| Nonoperating Income (Expense) | (34,079,000) | (45,133,000) | (36,966,000) | ||||||||||||||||||||||||
| Income (Loss) before Income Taxes | (122,823,000) | (109,352,000) | 106,578,000 | ||||||||||||||||||||||||
| Income Tax Expense (benefit) | (150,244,000) | (45,506,000) | 39,757,000 | ||||||||||||||||||||||||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 27,421,000 | (63,846,000) | 66,821,000 | ||||||||||||||||||||||||
| Consolidation, Eliminations [Member] | |||||||||||||||||||||||||||
| Condensed Income Statements, Captions [Line Items] | |||||||||||||||||||||||||||
| Revenues | 2,029,000 | (1,301,000) | |||||||||||||||||||||||||
| Operating Costs and Expenses | 1,971,000 | (1,002,000) | |||||||||||||||||||||||||
| Depreciation | 0 | 0 | |||||||||||||||||||||||||
| Amortization of Deferred Charges | 0 | 0 | |||||||||||||||||||||||||
| General and Administrative Expense | 58,000 | (151,000) | |||||||||||||||||||||||||
| Costs and Expenses | 2,029,000 | (1,153,000) | |||||||||||||||||||||||||
| (Gain) loss on sale of assets | 0 | 0 | |||||||||||||||||||||||||
| Operating Income (Loss) | 0 | (148,000) | |||||||||||||||||||||||||
| Investment Income, Interest | 0 | 0 | |||||||||||||||||||||||||
| Interest Expense | 0 | 0 | |||||||||||||||||||||||||
| EquityinEarningsofConsolidatedSubsidiaries | 14,989,000 | (106,798,000) | |||||||||||||||||||||||||
| Other Nonoperating Income (Expense) | 0 | (180,000) | |||||||||||||||||||||||||
| Nonoperating Income (Expense) | 14,989,000 | (106,978,000) | |||||||||||||||||||||||||
| Income (Loss) before Income Taxes | 14,989,000 | (107,126,000) | |||||||||||||||||||||||||
| Income Tax Expense (benefit) | 0 | 0 | |||||||||||||||||||||||||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | (63,489,000) | 14,989,000 | (107,126,000) | ||||||||||||||||||||||||
| Parent Company [Member] | |||||||||||||||||||||||||||
| Condensed Income Statements, Captions [Line Items] | |||||||||||||||||||||||||||
| Revenues | 0 | 0 | 0 | ||||||||||||||||||||||||
| Operating Costs and Expenses | 0 | 0 | 0 | ||||||||||||||||||||||||
| Depreciation | 0 | 0 | 0 | ||||||||||||||||||||||||
| Amortization of Deferred Charges | 0 | 0 | 0 | ||||||||||||||||||||||||
| General and Administrative Expense | 182,000 | 184,000 | 189,000 | ||||||||||||||||||||||||
| Costs and Expenses | 182,000 | 184,000 | 189,000 | ||||||||||||||||||||||||
| (Gain) loss on sale of assets | 0 | 0 | 0 | ||||||||||||||||||||||||
| Operating Income (Loss) | (182,000) | (184,000) | (189,000) | ||||||||||||||||||||||||
| Gain on early extinguishment of debt | 15,478,000 | ||||||||||||||||||||||||||
| Investment Income, Interest | 0 | 0 | 0 | ||||||||||||||||||||||||
| Interest Expense | (51,364,000) | (48,673,000) | (39,460,000) | ||||||||||||||||||||||||
| EquityinEarningsofConsolidatedSubsidiaries | 63,489,000 | (14,989,000) | 106,798,000 | ||||||||||||||||||||||||
| Other Nonoperating Income (Expense) | 0 | 0 | 0 | ||||||||||||||||||||||||
| Nonoperating Income (Expense) | 27,603,000 | (63,662,000) | 67,338,000 | ||||||||||||||||||||||||
| Income (Loss) before Income Taxes | 27,421,000 | (63,846,000) | 67,149,000 | ||||||||||||||||||||||||
| Income Tax Expense (benefit) | 0 | 0 | 0 | ||||||||||||||||||||||||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 27,421,000 | (63,846,000) | 67,149,000 | ||||||||||||||||||||||||
| Guarantor Subsidiaries [Member] | |||||||||||||||||||||||||||
| Condensed Income Statements, Captions [Line Items] | |||||||||||||||||||||||||||
| Revenues | 180,083,000 | 213,563,000 | 426,419,000 | ||||||||||||||||||||||||
| Operating Costs and Expenses | 108,517,000 | 114,783,000 | 178,748,000 | ||||||||||||||||||||||||
| Depreciation | 93,460,000 | 88,443,000 | 81,522,000 | ||||||||||||||||||||||||
| Amortization of Deferred Charges | 11,968,000 | 19,024,000 | 25,782,000 | ||||||||||||||||||||||||
| General and Administrative Expense | 45,078,000 | 39,479,000 | 44,398,000 | ||||||||||||||||||||||||
| Costs and Expenses | 259,023,000 | 261,729,000 | 330,450,000 | ||||||||||||||||||||||||
| (Gain) loss on sale of assets | (133,000) | 53,000 | 44,060,000 | ||||||||||||||||||||||||
| Operating Income (Loss) | (79,073,000) | (48,113,000) | 140,029,000 | ||||||||||||||||||||||||
| Gain on early extinguishment of debt | 0 | ||||||||||||||||||||||||||
| Investment Income, Interest | 1,320,000 | 984,000 | 1,125,000 | ||||||||||||||||||||||||
| Interest Expense | 0 | 0 | 0 | ||||||||||||||||||||||||
| EquityinEarningsofConsolidatedSubsidiaries | 0 | 0 | 0 | ||||||||||||||||||||||||
| Other Nonoperating Income (Expense) | 1,157,000 | (2,272,000) | (4,053,000) | ||||||||||||||||||||||||
| Nonoperating Income (Expense) | 2,477,000 | (1,288,000) | (2,928,000) | ||||||||||||||||||||||||
| Income (Loss) before Income Taxes | (76,596,000) | (49,401,000) | 137,101,000 | ||||||||||||||||||||||||
| Income Tax Expense (benefit) | (150,735,000) | (44,721,000) | 35,194,000 | ||||||||||||||||||||||||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 74,139,000 | (4,680,000) | 101,907,000 | ||||||||||||||||||||||||
| Non-Guarantor Subsidiaries [Member] | |||||||||||||||||||||||||||
| Condensed Income Statements, Captions [Line Items] | |||||||||||||||||||||||||||
| Revenues | 11,694,000 | 8,707,000 | 50,952,000 | ||||||||||||||||||||||||
| Operating Costs and Expenses | 12,385,000 | 14,904,000 | 41,514,000 | ||||||||||||||||||||||||
| Depreciation | 5,273,000 | 4,628,000 | 1,044,000 | ||||||||||||||||||||||||
| Amortization of Deferred Charges | 1,200,000 | 1,461,000 | 681,000 | ||||||||||||||||||||||||
| General and Administrative Expense | 2,348,000 | 3,637,000 | 3,861,000 | ||||||||||||||||||||||||
| Costs and Expenses | 21,206,000 | 24,630,000 | 47,100,000 | ||||||||||||||||||||||||
| (Gain) loss on sale of assets | 12,000 | 1,000 | 0 | ||||||||||||||||||||||||
| Operating Income (Loss) | (9,500,000) | (15,922,000) | 3,852,000 | ||||||||||||||||||||||||
| Gain on early extinguishment of debt | 0 | ||||||||||||||||||||||||||
| Investment Income, Interest | 883,000 | 506,000 | 400,000 | ||||||||||||||||||||||||
| Interest Expense | 0 | (2,000) | (36,000) | ||||||||||||||||||||||||
| EquityinEarningsofConsolidatedSubsidiaries | 0 | 0 | 0 | ||||||||||||||||||||||||
| Other Nonoperating Income (Expense) | (1,542,000) | 4,324,000 | 5,238,000 | ||||||||||||||||||||||||
| Nonoperating Income (Expense) | (659,000) | 4,828,000 | 5,602,000 | ||||||||||||||||||||||||
| Income (Loss) before Income Taxes | (10,159,000) | (11,094,000) | 9,454,000 | ||||||||||||||||||||||||
| Income Tax Expense (benefit) | 491,000 | (785,000) | 4,563,000 | ||||||||||||||||||||||||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | (10,650,000) | $ (10,309,000) | $ 4,891,000 | ||||||||||||||||||||||||
| Consolidation, Eliminations [Member] | |||||||||||||||||||||||||||
| Condensed Income Statements, Captions [Line Items] | |||||||||||||||||||||||||||
| Revenues | (365,000) | ||||||||||||||||||||||||||
| Operating Costs and Expenses | (365,000) | ||||||||||||||||||||||||||
| Depreciation | 0 | ||||||||||||||||||||||||||
| Amortization of Deferred Charges | 0 | ||||||||||||||||||||||||||
| General and Administrative Expense | (11,000) | ||||||||||||||||||||||||||
| Costs and Expenses | (376,000) | ||||||||||||||||||||||||||
| (Gain) loss on sale of assets | 0 | ||||||||||||||||||||||||||
| Operating Income (Loss) | 11,000 | ||||||||||||||||||||||||||
| Gain on early extinguishment of debt | 0 | ||||||||||||||||||||||||||
| Investment Income, Interest | 0 | ||||||||||||||||||||||||||
| Interest Expense | 0 | ||||||||||||||||||||||||||
| EquityinEarningsofConsolidatedSubsidiaries | (63,489,000) | ||||||||||||||||||||||||||
| Other Nonoperating Income (Expense) | (11,000) | ||||||||||||||||||||||||||
| Nonoperating Income (Expense) | (63,500,000) | ||||||||||||||||||||||||||
| Income (Loss) before Income Taxes | (63,489,000) | ||||||||||||||||||||||||||
| Income Tax Expense (benefit) | 0 | ||||||||||||||||||||||||||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ (63,489,000) | ||||||||||||||||||||||||||
| |||||||||||||||||||||||||||
| X | ||||||||||
- Definition Equity in Earnings of Consolidated Subsidiaries No definition available.
|
| X | ||||||||||
- Definition The amount of amortization of deferred charges applied against earnings during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Total costs of sales and operating expenses for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No definition available.
|
| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
|
| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
|
Condensed Consolidating Guarantor Financial Information Condensed Statement of Comprehensive Income (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Condensed Statement of Comprehensive Income Captions [Line Items] | |||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ 27,421 | $ (63,846) | $ 66,821 |
| Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment | (1,568) | 14,321 | (3,174) |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent | 25,853 | (49,525) | 63,647 |
| Consolidation, Eliminations [Member] | |||
| Condensed Statement of Comprehensive Income Captions [Line Items] | |||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | (63,489) | 14,989 | (107,126) |
| Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment | 0 | 0 | 0 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent | (63,489) | 14,989 | (107,126) |
| Parent Company [Member] | |||
| Condensed Statement of Comprehensive Income Captions [Line Items] | |||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 27,421 | (63,846) | 67,149 |
| Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment | 0 | 0 | 0 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent | 27,421 | (63,846) | 67,149 |
| Guarantor Subsidiaries [Member] | |||
| Condensed Statement of Comprehensive Income Captions [Line Items] | |||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 74,139 | (4,680) | 101,907 |
| Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment | (149) | 31 | (81) |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent | 73,990 | (4,649) | 101,826 |
| Non-Guarantor Subsidiaries [Member] | |||
| Condensed Statement of Comprehensive Income Captions [Line Items] | |||
| Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | (10,650) | (10,309) | 4,891 |
| Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment | (1,419) | 14,290 | (3,093) |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent | $ (12,069) | $ 3,981 | $ 1,798 |
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
Condensed Consolidating Guarantor Financial Information Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Condensed Cash Flow Statements, Captions [Line Items] | ||||
| Net Cash Provided by (Used in) Operating Activities | $ (14,658) | $ 53,500 | $ 217,095 | |
| Costs Incurred For Offshore Supply Vessels Newbuild Program | (18,104) | (76,277) | (190,070) | |
| Proceeds from Sale of Property, Plant, and Equipment | 43 | 524 | 152,000 | |
| Payments to Acquire Property, Plant, and Equipment | (1,687) | (20,689) | (86,792) | |
| Payments to Acquire Other Property, Plant, and Equipment | (1,552) | (569) | (16,487) | |
| Net Cash Provided by (Used in) Investing Activities | (21,300) | (97,011) | ||
| Proceeds from Lines of Credit | 66,640 | 0 | 0 | |
| Repayments of Senior Debt | (5,057) | 0 | 0 | |
| Repayments of Convertible Debt | (49,631) | 0 | 0 | |
| Payments of Financing Costs | (5,636) | (1,102) | (2,089) | |
| Payments Related to Tax Withholding for Share-based Compensation | (575) | (450) | (1,252) | |
| Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options | 485 | 1,300 | 3,112 | |
| Net Cash Provided by (Used in) Financing Activities | 6,226 | (252) | ||
| Effect of Exchange Rate on Cash and Cash Equivalents | (446) | 989 | (839) | |
| Cash and Cash Equivalents, Period Increase (Decrease) | (30,178) | (42,774) | 74,678 | |
| Cash and Cash Equivalents, at Carrying Value | 186,849 | 217,027 | 259,801 | $ 185,123 |
| Cash Paid for Interest | 52,194 | 50,152 | 50,492 | |
| Income Taxes Paid | 3,732 | 4,808 | ||
| Proceeds from Income Tax Refunds | (9,042) | |||
| Notes Reduction | 127,096 | 0 | 0 | |
| Consolidation, Eliminations [Member] | ||||
| Condensed Cash Flow Statements, Captions [Line Items] | ||||
| Net Cash Provided by (Used in) Operating Activities | 0 | 0 | ||
| Costs Incurred For Offshore Supply Vessels Newbuild Program | 0 | 0 | ||
| Proceeds from Sale of Property, Plant, and Equipment | 0 | 0 | ||
| Payments to Acquire Property, Plant, and Equipment | 0 | 0 | ||
| Payments to Acquire Other Property, Plant, and Equipment | 0 | 0 | ||
| Net Cash Provided by (Used in) Investing Activities | 0 | 0 | ||
| Payments of Financing Costs | 0 | |||
| Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options | 0 | |||
| Net Cash Provided by (Used in) Financing Activities | 0 | |||
| Effect of Exchange Rate on Cash and Cash Equivalents | 0 | |||
| Cash and Cash Equivalents, Period Increase (Decrease) | 0 | |||
| Cash and Cash Equivalents, at Carrying Value | 0 | 0 | 0 | |
| Cash Paid for Interest | 0 | |||
| Income Taxes Paid | 0 | |||
| Parent Company [Member] | ||||
| Condensed Cash Flow Statements, Captions [Line Items] | ||||
| Net Cash Provided by (Used in) Operating Activities | (6,231) | 251 | ||
| Costs Incurred For Offshore Supply Vessels Newbuild Program | 0 | 0 | ||
| Proceeds from Sale of Property, Plant, and Equipment | 0 | 0 | ||
| Payments to Acquire Property, Plant, and Equipment | 0 | 0 | ||
| Payments to Acquire Other Property, Plant, and Equipment | 0 | 0 | ||
| Net Cash Provided by (Used in) Investing Activities | 0 | 0 | ||
| Proceeds from Lines of Credit | 66,640 | |||
| Repayments of Senior Debt | (5,057) | |||
| Repayments of Convertible Debt | (49,631) | |||
| Payments of Financing Costs | 5,636 | (1,102) | ||
| Payments Related to Tax Withholding for Share-based Compensation | (575) | |||
| Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options | 485 | 1,300 | ||
| Net Cash Provided by (Used in) Financing Activities | 6,226 | (252) | ||
| Effect of Exchange Rate on Cash and Cash Equivalents | 0 | 0 | ||
| Cash and Cash Equivalents, Period Increase (Decrease) | (5) | (1) | ||
| Cash and Cash Equivalents, at Carrying Value | 4 | 9 | 10 | |
| Cash Paid for Interest | 52,194 | |||
| Income Taxes Paid | 0 | 0 | ||
| Notes Reduction | 127,096 | |||
| Guarantor Subsidiaries [Member] | ||||
| Condensed Cash Flow Statements, Captions [Line Items] | ||||
| Net Cash Provided by (Used in) Operating Activities | (12,152) | 55,677 | ||
| Costs Incurred For Offshore Supply Vessels Newbuild Program | (18,496) | (76,615) | ||
| Proceeds from Sale of Property, Plant, and Equipment | 33 | 523 | ||
| Payments to Acquire Property, Plant, and Equipment | (1,173) | (19,604) | ||
| Payments to Acquire Other Property, Plant, and Equipment | (1,512) | (467) | ||
| Net Cash Provided by (Used in) Investing Activities | (21,148) | (96,163) | ||
| Proceeds from Lines of Credit | 0 | |||
| Repayments of Senior Debt | 0 | |||
| Repayments of Convertible Debt | 0 | |||
| Payments of Financing Costs | 0 | 0 | ||
| Payments Related to Tax Withholding for Share-based Compensation | 0 | |||
| Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options | 0 | 0 | ||
| Net Cash Provided by (Used in) Financing Activities | 0 | 0 | ||
| Effect of Exchange Rate on Cash and Cash Equivalents | (150) | 31 | ||
| Cash and Cash Equivalents, Period Increase (Decrease) | (33,450) | (40,455) | ||
| Cash and Cash Equivalents, at Carrying Value | 178,746 | 212,196 | 252,651 | |
| Cash Paid for Interest | 0 | 0 | ||
| Income Taxes Paid | (9,793) | 1,292 | ||
| Notes Reduction | 0 | |||
| Non-Guarantor Subsidiaries [Member] | ||||
| Condensed Cash Flow Statements, Captions [Line Items] | ||||
| Net Cash Provided by (Used in) Operating Activities | 3,725 | (2,428) | ||
| Costs Incurred For Offshore Supply Vessels Newbuild Program | 392 | 338 | ||
| Proceeds from Sale of Property, Plant, and Equipment | 10 | 1 | ||
| Payments to Acquire Property, Plant, and Equipment | (514) | (1,085) | ||
| Payments to Acquire Other Property, Plant, and Equipment | (40) | (102) | ||
| Net Cash Provided by (Used in) Investing Activities | (152) | (848) | ||
| Proceeds from Lines of Credit | 0 | |||
| Repayments of Senior Debt | 0 | |||
| Repayments of Convertible Debt | 0 | |||
| Payments of Financing Costs | 0 | 0 | ||
| Payments Related to Tax Withholding for Share-based Compensation | 0 | |||
| Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options | 0 | 0 | ||
| Net Cash Provided by (Used in) Financing Activities | 0 | 0 | ||
| Effect of Exchange Rate on Cash and Cash Equivalents | (296) | 958 | ||
| Cash and Cash Equivalents, Period Increase (Decrease) | 3,277 | (2,318) | ||
| Cash and Cash Equivalents, at Carrying Value | 8,099 | 4,822 | $ 7,140 | |
| Cash Paid for Interest | 0 | |||
| Income Taxes Paid | 751 | 2,440 | ||
| Notes Reduction | 0 | |||
| Consolidation, Eliminations [Member] | ||||
| Condensed Cash Flow Statements, Captions [Line Items] | ||||
| Proceeds from Lines of Credit | 0 | |||
| Repayments of Senior Debt | ||||
| Repayments of Convertible Debt | 0 | |||
| Payments of Financing Costs | 0 | |||
| Payments Related to Tax Withholding for Share-based Compensation | 0 | |||
| Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options | 0 | |||
| Net Cash Provided by (Used in) Financing Activities | 0 | |||
| Effect of Exchange Rate on Cash and Cash Equivalents | 0 | |||
| Cash and Cash Equivalents, Period Increase (Decrease) | 0 | |||
| Cash and Cash Equivalents, at Carrying Value | 0 | $ 0 | ||
| Cash Paid for Interest | 0 | |||
| Income Taxes Paid | 0 | |||
| Notes Reduction | $ 0 | |||
| X | ||||||||||
- Definition Costs Incurred For Offshore Supply Vessels Newbuild Program. No definition available.
|
| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash paid for interest. Includes, but is not limited to, payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The value of notes retired (or transferred to another entity) in noncash investing or financing transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash outflow for loan and debt issuance costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash outflow from the acquisition of or improvements to long-lived, physical assets used to produce goods and services and not intended for resale, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of cash received during the period as refunds for the overpayment of taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow from issuance of shares under share-based compensation arrangement. Issuance includes, but is not limited to, exercise of stock options and similar instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
|
Supplemental Selected Quarterly Financial Data (Unaudited) - Supplemental Selected Quarterly Financial Data (Unaudited) (Detail) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
[1],[2] | Sep. 30, 2017 |
[1],[2] | Jun. 30, 2017 |
[1],[2] | Mar. 31, 2017 |
[1],[2] | Dec. 31, 2016 |
[2] | Sep. 30, 2016 |
[2] | Jun. 30, 2016 |
[2] | Mar. 31, 2016 |
[2] | Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
||||||||||
| Quarterly Financial Information [Line Items] | ||||||||||||||||||||||||||||
| Vessel revenues | $ 56,241 | $ 53,666 | $ 37,426 | $ 44,079 | $ 41,879 | $ 51,927 | $ 53,673 | $ 76,820 | $ 191,412 | $ 224,299 | $ 476,070 | |||||||||||||||||
| Operating Income (Loss) | (14,278) | (16,667) | (31,318) | (26,481) | (27,484) | (14,445) | [3] | (21,510) | (780) | [3] | (88,744) | (64,219) | 143,544 | |||||||||||||||
| Net Income (loss) | $ 93,758 | $ (18,950) | $ (19,489) | $ (27,898) | $ (19,243) | $ (16,503) | $ (20,586) | $ (7,514) | $ 27,421 | $ (63,846) | $ 66,821 | [4] | ||||||||||||||||
| Earnings (loss) per common share: | ||||||||||||||||||||||||||||
| Basic earnings (loss) per common share | $ 2.53 | $ (0.51) | $ (0.53) | $ (0.76) | $ (0.53) | $ (0.45) | $ (0.57) | $ (0.21) | $ 0.74 | $ (1.76) | $ 1.87 | |||||||||||||||||
| Diluted earnings (loss) per common share, in dollars per share | $ 2.48 | $ (0.51) | $ (0.53) | $ (0.76) | $ (0.53) | $ (0.45) | $ (0.57) | $ (0.21) | $ 0.73 | $ (1.76) | $ 1.84 | |||||||||||||||||
| ||||||||||||||||||||||||||||
| X | ||||||||||
- Definition Quarterly Financial Information [Line Items] No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
|
| X | ||||||||||
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
Supplemental Selected Quarterly Financial Data (Unaudited) - Supplemental Selected Quarterly Financial Data (Unaudited) (Narrative) (Detail) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Dec. 31, 2017
USD ($)
$ / shares
|
Dec. 31, 2017
USD ($)
Vessel
$ / shares
|
Dec. 31, 2016
USD ($)
Vessel
|
Dec. 31, 2015
USD ($)
|
|
| Quarterly Financial Information [Line Items] | ||||
| Number of Vessels Stacked | Vessel | 42.8 | 41.3 | ||
| Average Number of MPSVs Stacked | Vessel | 0.8 | 0 | ||
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ | $ 125,225 | $ (125,225) | $ 0 | $ 0 |
| Net Income (loss) excluding one time tax item | $ | $ (17,281) | $ (82,687) | ||
| Earnings per share diluted excluding one time tax item | $ / shares | $ (0.47) | $ (2.24) | ||
| X | ||||||||||
- Definition Average Number of MPSVs Stacked No definition available.
|
| X | ||||||||||
- Definition Average Number of OSVs Stacked No definition available.
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period available excluding one time tax items to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. No definition available.
|
| X | ||||||||||
- Definition Net Income (loss) attributable to the parent excluding one time tax item No definition available.
|
| X | ||||||||||
- Definition Quarterly Financial Information [Line Items] No definition available.
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|