STATEMENTS OF CONSOLIDATED OPERATIONS - USD ($) shares in Thousands, $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	May 04, 2017	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Total revenues		$ 205,479	$ 275,575	$ 340,144
Costs and expenses:
Lease operating expense		74,547	123,918	114,405
Exploration		32	51	3,045
Taxes other than income		11,101	18,668	20,364
Depreciation, depletion, and amortization		35,979	55,843	52,334
Impairment expense		0	2,246	0
General and administrative expense		29,506	55,288	43,129
Accretion of asset retirement obligations		4,384	5,559	5,711
(Gain) loss on commodity derivative instruments		31,609	6,700	(8,155)
(Gain) loss on sale of properties		0	0	3,614
Other, net		485	798	943
Total costs and expenses		206,295	287,546	258,621
Operating income (loss)		(816)	(11,971)	81,523
Other income (expense):
Interest expense, net		(15,936)	(16,855)	(21,923)
Other income (expense)		16,981	(1,117)	190
Loss on lease		0	(4,247)	0
Gain (loss) on extinguishment on debt		0	0	(3,034)
Total other income (expense)		1,045	(22,219)	(24,767)
Income (loss) before reorganization items, net and income taxes		229	(34,190)	56,756
Reorganization items, net		(1,119)	(1,057)	(2,147)
Income tax benefit (expense)		2,176	50	0
Net income (loss)		1,286	(35,197)	54,609
Net income (loss) attributable to Successor/Predecessor		1,286	(35,197)	54,609
Successor/Predecessor interest in net income (loss):
Net income (loss) attributable to Successor/Predecessor		1,286	(35,197)	54,609
Net (income) loss allocated to participating restricted stockholders		(35)	0	(2,426)
Net income (loss) available to common stockholders/limited partners		$ 1,251	$ (35,197)	$ 52,183
Earnings per share/unit: (See Note 13)
Basic and diluted earnings per share/unit		$ 0.05	$ (1.20)	$ 2.09
Weighted average common shares/units outstanding:
Basic and diluted		25,000	29,301	24,959
Predecessor [Member]
Revenues:
Total revenues	$ 109,201
Costs and expenses:
Lease operating expense	35,568
Exploration	21
Taxes other than income	5,187
Depreciation, depletion, and amortization	37,717
Impairment expense	0
General and administrative expense	31,606
Accretion of asset retirement obligations	3,407
(Gain) loss on commodity derivative instruments	(23,076)
(Gain) loss on sale of properties	0
Other, net	36
Total costs and expenses	101,238
Operating income (loss)	7,963
Other income (expense):
Interest expense, net	(10,243)
Other income (expense)	8
Loss on lease	0
Gain (loss) on extinguishment on debt	0
Total other income (expense)	(10,235)
Income (loss) before reorganization items, net and income taxes	(2,272)
Reorganization items, net	(88,774)
Income tax benefit (expense)	91
Net income (loss)	(90,955)
Net income (loss) attributable to Successor/Predecessor	(90,955)
Successor/Predecessor interest in net income (loss):
Net income (loss) attributable to Successor/Predecessor	(90,955)
Net (income) loss allocated to participating restricted stockholders	0
Net income (loss) available to common stockholders/limited partners	$ (90,955)
Earnings per share/unit: (See Note 13)
Basic and diluted earnings per share/unit	$ (1.09)
Weighted average common shares/units outstanding:
Basic and diluted	83,807
Oil and Natural Gas Sales [Member]
Revenues:
Total revenues		$ 205,176	$ 274,607	$ 339,840
Oil and Natural Gas Sales [Member] | Predecessor [Member]
Revenues:
Total revenues	$ 108,970
Other Revenues [Member]
Revenues:
Total revenues		303	968	304
Other Revenues [Member] | Predecessor [Member]
Revenues:
Total revenues	231
Gathering, Processing and Transportation [Member]
Costs and expenses:
Gathering, processing, and transportation		$ 18,652	$ 18,475	$ 23,231
Gathering, Processing and Transportation [Member] | Predecessor [Member]
Costs and expenses:
Gathering, processing, and transportation	$ 10,772