Condensed Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Oil and natural gas	$ 69,190	$ 107,256	$ 127,464	$ 213,325
Contract drilling	24,257	55,015	62,967	150,092
Gas gathering and processing	44,858	52,176	84,058	106,129
Total revenues	138,305	214,447	274,489	469,546
Oil and natural gas:
Operating costs	33,331	45,972	66,677	91,183
Depreciation, depletion, and amortization	30,411	68,101	62,243	145,219
Impairment of oil and natural gas properties (Note 2)	74,291	410,536	112,120	811,129
Contract drilling:
Operating costs	19,254	36,485	47,352	88,231
Depreciation	10,918	13,265	23,113	28,278
Impairment of contract drilling equipment (Note 3)	0	8,314	0	8,314
Gas gathering and processing:
Operating costs	32,381	40,592	63,447	84,767
Depreciation and amortization	11,515	10,848	22,974	21,542
General and administrative	8,382	9,624	17,097	18,994
Gain on disposition of assets	(477)	(415)	(669)	(960)
Total operating expenses	220,006	643,322	414,354	1,296,697
Loss from operations	(81,701)	(428,875)	(139,865)	(827,151)
Other income (expense):
Interest, net	(10,606)	(7,956)	(20,223)	(15,196)
Gain (loss) on derivatives	(22,672)	(1,919)	(11,743)	4,667
Other	1	24	(14)	22
Total other income (expense)	(33,277)	(9,851)	(31,980)	(10,507)
Loss before income taxes	(114,978)	(438,726)	(171,845)	(837,658)
Income tax expense (benefit):
Current	0	803	0	868
Deferred	(42,842)	(165,140)	(58,560)	(315,783)
Total income taxes	(42,842)	(164,337)	(58,560)	(314,915)
Net loss	$ (72,136)	$ (274,389)	$ (113,285)	$ (522,743)
Net loss per common share:
Basic	$ (1.44)	$ (5.58)	$ (2.27)	$ (10.66)
Diluted	$ (1.44)	$ (5.58)	$ (2.27)	$ (10.66)