Condensed Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Oil and natural gas	$ 96,619	$ 188,471	$ 309,944	$ 575,176
Contract drilling	65,022	120,652	215,114	341,530
Gas gathering and processing	50,752	91,851	156,881	277,687
Total revenues	212,393	400,974	681,939	1,194,393
Oil and natural gas:
Operating costs	38,688	48,841	129,871	133,979
Depreciation, depletion, and amortization	57,159	70,033	202,378	200,958
Impairment of oil and natural gas properties (Note 2)	329,924	0	1,141,053	0
Contract drilling:
Operating costs	35,486	66,727	123,717	197,025
Depreciation	14,255	22,560	42,533	61,194
Impairment of contract drilling equipment (Note 3)	0	0	8,314	0
Gas gathering and processing:
Operating costs	40,314	78,558	125,081	238,166
Depreciation and amortization	10,976	10,272	32,518	29,972
General and administrative	7,643	10,172	26,637	30,409
(Gain) loss on disposition of assets	7,230	529	6,270	(9,092)
Total operating expenses	541,675	307,692	1,838,372	882,611
Income (loss) from operations	(329,282)	93,282	(1,156,433)	311,782
Other income (expense):
Interest, net	(8,286)	(4,280)	(23,482)	(12,201)
Gain (loss) on derivatives not designated as hedges (Note 10)	8,250	19,841	12,917	(9,234)
Other	16	(68)	38	3
Total other expense	(20)	15,493	(10,527)	(21,432)
Income (loss) before income taxes	(329,302)	108,775	(1,166,960)	290,350
Income tax expense (benefit):
Current	(2,584)	5,451	(1,716)	23,721
Deferred	(121,437)	35,802	(437,220)	87,802
Total income taxes	(124,021)	41,253	(438,936)	111,523
Net income (loss)	$ (205,281)	$ 67,522	$ (728,024)	$ 178,827
Net income (loss) per common share:
Basic	$ (4.18)	$ 1.39	$ (14.83)	$ 3.68
Diluted	$ (4.18)	$ 1.37	$ (14.83)	$ 3.65