Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 22, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Predecessor [Member]
Revenues:
Oil and gas sales	$ 43,027		$ 246,270	$ 547,790
Price-risk management and other, net	(245)		(1,549)	1,666
Total Revenues	42,782		244,721	549,456
Costs and Expenses:
General and administrative, net	9,245		42,611	39,629
Depreciation, depletion, and amortization	20,439		177,512	267,590
Accretion of asset retirement obligation	1,610		5,572	5,712
Lease operating cost	14,933		70,188	93,214
Transportation and gas processing	6,090		21,741	21,140
Severance and other taxes	3,917		17,090	37,038
Interest expense, net	13,347		75,870	73,207
Write-down of oil and gas properties	77,732		1,562,086	445,396
Reorganization items	(956,142)		6,565	0
Total Costs and Expenses	(808,829)		1,979,235	982,926
Income (Loss) Before Income Taxes	851,611		(1,734,514)	(433,470)
Provision (Benefit) for Income Taxes	0		(80,543)	(150,043)
Net Income (Loss)	$ 851,611		$ (1,653,971)	$ (283,427)
Per Share Amounts-
Earnings (Loss) Per Share, Basic	$ 19.06		$ (37.20)	$ (6.47)
Earnings (Loss) Per Share, Diluted	$ 18.64		$ (37.20)	$ (6.47)
Weighted Average Shares Outstanding - Basic	44,692		44,463	43,795
Weighted Average Shares Outstanding - Diluted	45,697		44,463	43,795
Successor [Member]
Revenues:
Oil and gas sales		$ 121,386
Price-risk management and other, net		(19,849)
Total Revenues		101,537
Costs and Expenses:
General and administrative, net		22,538
Depreciation, depletion, and amortization		36,436
Accretion of asset retirement obligation		2,878
Lease operating cost		25,777
Transportation and gas processing		13,038
Severance and other taxes		6,713
Interest expense, net		15,310
Write-down of oil and gas properties		133,496
Reorganization items		1,639
Total Costs and Expenses		257,825
Income (Loss) Before Income Taxes		(156,288)
Provision (Benefit) for Income Taxes		0
Net Income (Loss)		$ (156,288)
Per Share Amounts-
Earnings (Loss) Per Share, Basic		$ (15.61)
Earnings (Loss) Per Share, Diluted		$ (15.61)
Weighted Average Shares Outstanding - Basic		10,013
Weighted Average Shares Outstanding - Diluted		10,013