Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues
Oil and natural gas	$ 294,221	$ 385,774	$ 740,079
Contract drilling	122,086	265,668	476,517
Gas gathering and processing	185,870	202,789	356,348
Total revenues	602,177	854,231	1,572,944
Operating costs:
Oil and natural gas	120,184	166,046	187,916
Contract drilling	88,154	156,408	274,933
Gas gathering and processing	137,609	161,556	306,831
Total operating costs	345,947	484,010	769,680
Depreciation, depletion, and amortization	208,353	352,742	402,888
Impairments	161,563	1,634,628	158,069
General and administrative	33,337	34,358	41,027
(Gain) loss on disposition of assets	(2,540)	7,229	(8,953)
Total expenses	746,660	2,512,967	1,362,711
Income (loss) from operations	(144,483)	(1,658,736)	210,233
Other income (expense):
Interest, net	(39,829)	(31,963)	(17,371)
Gain (loss) on derivatives	(22,813)	26,345	30,147
Other	307	45	(70)
Total other income (expense)	(62,335)	(5,573)	12,706
Income (loss) before income taxes	(206,818)	(1,664,309)	222,939
Income tax expense (benefit):
Current	15	(20,616)	9,378
Deferred	(71,209)	(606,332)	77,285
Total Income tax expense (benefit)	(71,194)	(626,948)	86,663
Net income (loss)	$ (135,624)	$ (1,037,361)	$ 136,276
Net income (loss) per common share:
Basic	$ (2.71)	$ (21.12)	$ 2.80
Diluted	$ (2.71)	$ (21.12)	$ 2.78