Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue	$ 123,719	$ 274,806	$ 495,769
Costs and expenses:
Direct operating expenses	83,165	169,837	236,244
Drydock expense	4,662	15,387	24,840
General and administrative expense	37,663	47,280	62,728
Depreciation and amortization	58,182	72,591	75,336
Total reduction in value of assets	162,808	152,103	8,995
Gain on sale of assets and other	8,564	1,160	(14,039)
Total costs and expenses	355,044	458,358	394,104
Operating income (loss)	(231,325)	(183,552)	101,665
Other income (expense):
Interest expense	(33,486)	(36,946)	(29,332)
Interest income	133	260	307
Gain on extinguishment of debt	35,912	458
Other financing costs	(11,287)
Foreign currency loss and other	(2,384)	(1,088)	(995)
Total other expense	(11,112)	(37,316)	(30,020)
Income (loss) before income taxes	(242,437)	(220,868)	71,645
Income tax benefit (provision)	39,458	5,633	(9,270)
Net income (loss)	$ (202,979)	$ (215,235)	$ 62,375
Earnings (loss) per share:
Basic (in dollars per share)	$ (8.09)	$ (8.70)	$ 2.39
Diluted (in dollars per share)	$ (8.09)	$ (8.70)	$ 2.39
Weighted average shares outstanding:
Basic (in shares)	25,094	24,729	26,097
Diluted (in shares)	25,094	24,729	26,097
Cash dividends declared per common share (in dollars per share)			$ 1