CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating revenue:
Oil production	$ 72,711	$ 111,585	$ 132,986	$ 219,092
Natural gas production	12,553	26,907	27,726	55,244
Natural gas liquids production	3,718	11,033	8,453	23,399
Other operational income	337	0	693	1,792
Derivative income, net	0	0	0	2,427
Total operating revenue	89,319	149,525	169,858	301,954
Operating expenses:
Lease operating expenses	18,826	27,429	38,373	55,006
Transportation, processing and gathering expenses	7,183	19,940	8,024	37,643
Production taxes	578	1,827	1,059	4,342
Depreciation, depletion and amortization	46,231	77,951	107,789	164,373
Write-down of oil and gas properties	118,649	224,294	247,853	715,706
Accretion expense	10,082	6,408	20,065	12,817
Salaries, general and administrative expenses	20,014	16,418	32,768	33,425
Incentive compensation expense	4,670	1,264	9,649	2,827
Restructuring fees	9,436	0	10,389	0
Other operational expenses	27,680	1,454	40,207	1,170
Derivative expense, net	626	701	488	0
Total operating expenses	263,975	377,686	516,664	1,027,309
Loss from operations	(174,656)	(228,161)	(346,806)	(725,355)
Other (income) expenses:
Interest expense	17,599	10,472	32,840	20,837
Interest income	(302)	(66)	(416)	(188)
Other income	(270)	(613)	(568)	(756)
Other expense	9	0	11	0
Total other expenses	17,036	9,793	31,867	19,893
Loss before income taxes	(191,692)	(237,954)	(378,673)	(745,248)
Provision (benefit) for income taxes:
Current	(2,113)	0	(3,187)	0
Deferred	6,182	(85,048)	9,059	(264,954)
Total income taxes	4,069	(85,048)	5,872	(264,954)
Net loss	$ (195,761)	$ (152,906)	$ (384,545)	$ (480,294)
Basic loss per share (usd per share)	$ (35.05)	$ (27.68)	$ (68.94)	$ (86.99)
Diluted loss per share (usd per share)	$ (35.05)	$ (27.68)	$ (68.94)	$ (86.99)
Average shares outstanding (in shares)	5,585	5,525	5,578	5,521
Average shares outstanding assuming dilution (in shares)	5,585	5,525	5,578	5,521