CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended
	Mar. 31, 2017	Feb. 28, 2017	Mar. 31, 2016
Operating revenue:
Oil production	$ 20,027
Natural gas production	2,210
Natural gas liquids production	777
Other operational income	149
Derivative income, net	2,646
Total operating revenue	25,809
Operating expenses:
Lease operating expenses	4,740
Transportation, processing and gathering expenses	144
Production taxes	65
Depreciation, depletion and amortization	15,847
Write-down of oil and gas properties	256,435
Accretion expense	2,901
Salaries, general and administrative expenses	3,322
Incentive compensation expense	0
Restructuring fees	288
Other operational expenses	661
Derivative expense, net	0
Total operating expenses	284,403
Gain on Appalachia Properties divestiture	0
Income (loss) from operations	(258,594)
Other (income) expenses:
Interest expense	1,190
Interest income	(40)
Other income	(131)
Other expense	0
Reorganization items, net	0
Total other (income) expense	1,019
Income (loss) before income taxes	(259,613)
Provision (benefit) for income taxes:
Current	0
Deferred	0
Total income taxes	0
Net income (loss)	$ (259,613)
Basic income (loss) per share (in usd per share)	$ (12.98)
Diluted income (loss) per share (in usd per share)	$ (12.98)
Average shares outstanding (in shares)	19,997
Average shares outstanding assuming dilution (in shares)	19,997
Predecessor
Operating revenue:
Oil production		$ 45,837	$ 60,275
Natural gas production		13,476	15,173
Natural gas liquids production		8,706	4,735
Other operational income		903	356
Derivative income, net		0	138
Total operating revenue		68,922	80,677
Operating expenses:
Lease operating expenses		8,820	19,547
Transportation, processing and gathering expenses		6,933	841
Production taxes		682	481
Depreciation, depletion and amortization		37,429	61,558
Write-down of oil and gas properties		0	129,204
Accretion expense		5,447	9,983
Salaries, general and administrative expenses		9,629	12,754
Incentive compensation expense		2,008	4,979
Restructuring fees		0	953
Other operational expenses		530	12,527
Derivative expense, net		1,778	0
Total operating expenses		73,256	252,827
Gain on Appalachia Properties divestiture		213,453	0
Income (loss) from operations		209,119	(172,150)
Other (income) expenses:
Interest expense		0	15,241
Interest income		(45)	(114)
Other income		(315)	(298)
Other expense		13,336	2
Reorganization items, net		(437,744)	0
Total other (income) expense		(424,768)	14,831
Income (loss) before income taxes		633,887	(186,981)
Provision (benefit) for income taxes:
Current		3,570	(1,074)
Deferred		0	2,877
Total income taxes		3,570	1,803
Net income (loss)		$ 630,317	$ (188,784)
Basic income (loss) per share (in usd per share)		$ 110.99	$ (33.89)
Diluted income (loss) per share (in usd per share)		$ 110.99	$ (33.89)
Average shares outstanding (in shares)		5,634	5,571
Average shares outstanding assuming dilution (in shares)		5,634	5,571