CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating revenue:
Oil production	$ 111,585	$ 142,393	$ 219,092	$ 280,682
Natural gas production	26,907	46,667	55,244	103,029
Natural gas liquids production	11,033	15,936	23,399	43,906
Other operational income		2,050	1,792	3,047
Derivative income, net			2,427
Total operating revenue	149,525	207,046	301,954	430,664
Operating expenses:
Lease operating expenses	27,429	49,454	55,006	96,357
Transportation, processing and gathering expenses	19,940	14,098	37,643	28,724
Production taxes	1,827	3,257	4,342	6,319
Depreciation, depletion and amortization	77,951	92,835	164,373	175,481
Write-down of oil and gas properties	224,294		715,706
Accretion expense	6,408	7,733	12,817	15,288
Salaries, general and administrative expenses	16,418	16,637	33,425	32,966
Incentive compensation expense	1,264	3,903	2,827	7,037
Other operational expenses	1,454		1,170	212
Derivative expense, net	701	2,516		3,115
Total operating expenses	377,686	190,433	1,027,309	365,499
Income (loss) from operations	(228,161)	16,613	(725,355)	65,165
Other (income) expenses:
Interest expense	10,472	9,913	20,837	18,270
Interest income	(66)	(193)	(188)	(336)
Other income	(613)	(722)	(756)	(1,429)
Other expense		179		179
Total other (income) expenses	9,793	9,177	19,893	16,684
Income (loss) before income taxes	(237,954)	7,436	(745,248)	48,481
Provision (benefit) for income taxes:
Deferred	(85,048)	2,992	(264,954)	18,094
Total income taxes	(85,048)	2,992	(264,954)	18,094
Net income (loss)	$ (152,906)	$ 4,444	$ (480,294)	$ 30,387
Basic earnings (loss) per share	$ (2.77)	$ 0.08	$ (8.70)	$ 0.59
Diluted earnings (loss) per share	$ (2.77)	$ 0.08	$ (8.70)	$ 0.59
Average shares outstanding	55,251	52,050	55,216	50,540
Average shares outstanding assuming dilution	55,251	52,373	55,216	50,727