SEC Filings

HORNBECK OFFSHORE SERVICES INC /LA filed this Form 10-K on 02/28/2018
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Operating expenses. Operating expenses were $131.7 million, a decrease of $87.6 million, or 40.0%, for 2016 compared to $219.3 million for 2015. Operating expenses were primarily driven lower by vessels that were removed from our active fleet count since December 2014, which resulted in a substantial reduction in mariner headcount, and multiple reductions to active mariner pay levels since December 2014. This decrease was partially offset by $9.9 million of operating costs related to the full or partial-period contribution from vessels added to our fleet since December 2014.
Depreciation and Amortization. Depreciation and amortization expense of $113.6 million was $4.5 million, or 4.2%, higher for 2016 compared to 2015. Depreciation increased by $10.5 million primarily due to the contribution of eight vessels that were placed in service on various dates since December 2014. The depreciation increase was partially offset by a decrease in amortization expense of $6.0 million, which was mainly driven by postponed recertifications for certain of our stacked OSVs.
General and Administrative Expenses. General and administrative expenses of $43.4 million were $4.9 million lower during 2016 compared to 2015. The decrease in G&A expense was primarily due to lower shoreside compensation expense. Shoreside compensation expense was lower due to workforce reductions that were implemented in late 2015 and during 2016, as well as lower short-term incentive compensation expense.
Gain on Sale of Assets. During 2015, we completed the sale of four 250EDF class OSVs 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).
Operating Income (Loss). Operating income decreased by $207.8 million to an operating loss of $(64.2) million during 2016 compared to 2015 for the reasons discussed above. Operating loss as a percentage of revenues was (28.6)% for 2016 compared to an operating income margin of 30.2% for 2015. Excluding the gain on sale of assets, our operating income for 2015 would have been $99.5 million, or 20.9% of revenues.
Interest Expense. Interest expense of $48.7 million increased $9.2 million during 2016 compared to 2015 primarily due to capitalizing a lower percentage of interest compared to the prior-year period driven by a lower average construction work-in-progress balance under our newbuild program in 2016. During 2016, we recorded $16.7 million of capitalized construction period interest, or roughly 25.5% of our total interest costs, compared to capitalizing $24.7 million, or roughly 38.5% of our total interest costs, for 2015.
Interest Income. Interest income was $1.5 million for fiscal 2016 and for fiscal 2015. Our average cash balance decreased to $237.5 million for 2016 compared to $269.9 million for 2015. The average interest rate earned on our invested cash balances was approximately 0.6% and 0.5% during fiscal years 2016 and 2015, respectively. The decrease in average cash balance was primarily due to cash outflows associated with our fifth OSV newbuild program and lower revenues earned by active vessels operating in our fleet during 2016 compared to the prior-year period.
Income Tax Expense (Benefit). Our effective tax (benefit) rate was (41.6)% and 37.3% for 2016 and 2015, respectively. Our income tax expense for each year primarily consisted of deferred taxes. Our income tax rate differs from the federal statutory rate primarily due to expected state tax liabilities and items not deductible for federal income tax purposes. Our benefit rate for fiscal 2016 was higher than the tax rate in the prior year due to a favorable tax election we made in our 2015 federal income tax return filed in the fourth quarter of 2016.
Net Income (Loss). Operating performance decreased year-over-year by $130.7 million for a reported net loss of $(63.8) million for 2016 compared to net income of $66.8 million for 2015. Excluding the gain on sale of assets, net income would have been $39.2 million for 2015. This decrease in net income for 2016 was primarily driven by lower revenues due to weak market conditions discussed above and the reduction of active vessels in our operating fleet.