Consolidated statements of operations - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2017	Mar. 21, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues - commodity sales	$ 75,947			$ 157,803
Costs and expenses:
Lease operating	24,209			51,527
Transportation and processing	2,942			6,370
Production taxes	4,536			8,235
Depreciation, depletion and amortization	32,167			66,432
Loss on impairment of oil and gas assets				0
Loss on impairment of other assets	0			0
General and administrative	9,924			24,641
Liability management				0
Cost reduction initiatives	34			155
Total costs and expenses	73,812			157,360
Operating income (loss)	2,135			443
Non-operating (expense) income:
Interest expense	(5,283)			(10,984)
Derivative (losses) gains	(15,448)			(4,089)
Write-off of Senior Note issuance costs, discount and premium				0
Other income (expense), net	376			(180)
Net non-operating (expense) income	(20,355)			(15,253)
Reorganization items, net	(858)			(2,548)
(Loss) income before income taxes	(19,078)			(17,358)
Income tax expense (benefit)	37			75
Net (loss) income	$ (19,115)			$ (17,433)
Earnings per share:
Basic for Class A and Class B	$ (0.42)			$ (0.39)
Diluted for Class A and Class B	$ (0.42)			$ (0.39)
Weighted average shares used to compute earnings per share:
Basic for Class A and Class B	44,982,142			44,982,142
Diluted for Class A and Class B	44,982,142			44,982,142
Predecessor
Revenues - commodity sales		$ 66,531	$ 65,847		$ 180,076
Costs and expenses:
Lease operating		19,941	22,291		68,462
Transportation and processing		2,034	2,429		6,493
Production taxes		2,417	2,174		6,812
Depreciation, depletion and amortization		24,915	29,624		94,396
Loss on impairment of oil and gas assets		0			281,079
Loss on impairment of other assets		0	202		1,461
General and administrative		6,843	1,519		14,812
Liability management		0			9,396
Cost reduction initiatives		629	89		3,228
Total costs and expenses		56,779	58,328		486,139
Operating income (loss)		9,752	7,519		(306,063)
Non-operating (expense) income:
Interest expense		(5,862)	(7,436)		(57,243)
Derivative (losses) gains		48,006			(9,468)
Write-off of Senior Note issuance costs, discount and premium		0			(16,970)
Other income (expense), net		1,373	(129)		217
Net non-operating (expense) income		43,517	(7,565)		(83,464)
Reorganization items, net		988,727	(5,504)		(10,859)
(Loss) income before income taxes		1,041,996	(5,550)		(400,386)
Income tax expense (benefit)		37	(59)		165
Net (loss) income		$ 1,041,959	$ (5,491)		$ (400,551)
Earnings per share:
Basic for Class A and Class B		$ 0	$ 0		$ 0
Diluted for Class A and Class B		$ 0	$ 0		$ 0
Weighted average shares used to compute earnings per share:
Basic for Class A and Class B		0	0		0
Diluted for Class A and Class B		0	0		0