UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues:
Total revenues	$ 72,469	$ 58,136
Costs and expenses:
Lease operating expense	28,906	35,723
Exploration	16	16
Taxes other than income	4,613	3,986
Depreciation, depletion and amortization	7,347	15,556
Impairment expense	0	455,031
General and administrative expense	6,921	8,353
Accretion of asset retirement obligations	1,615	1,513
(Gain) loss on commodity derivative instruments	34,588	(107,713)
Other, net	68	0
Total costs and expenses	88,653	417,518
Operating income (loss)	(16,184)	(359,382)
Other income (expense):
Interest expense, net	(3,112)	(7,647)
Other income (expense)	(26)	16
Total other income (expense)	(3,138)	(7,631)
Income (loss) before reorganization items, net and income taxes	(19,322)	(367,013)
Reorganization items, net	(6)	(186)
Net income (loss)	(19,328)	(367,199)
Net (income) loss allocated to participating restricted stockholders	0	0
Net income (loss) attributable to common stockholders	$ (19,328)	$ (367,199)
Earnings (loss) per share: (See Note 10)
Basic and diluted earnings (loss) per share	$ (0.51)	$ (9.77)
Weighted average common shares outstanding:
Basic and diluted	37,829	37,568
Oil and Natural Gas Sales [Member]
Revenues:
Total revenues	$ 72,331	$ 57,787
Other Revenues [Member]
Revenues:
Total revenues	138	349
Gathering, Processing and Transportation [Member]
Costs and expenses:
Gathering, processing and transportation	$ 4,579	$ 5,053