Consolidated statements of operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Total revenues	$ 1,394,075	$ 677,192	$ 837,281
Costs and expenses:
Lease operating expenses	101,994	82,020	90,786
Production and ad valorem taxes	68,742	33,050	40,712
General and administrative	62,801	50,534	54,729
Organizational restructuring expenses	9,800	4,200	16,371
Depletion, depreciation and amortization	215,355	217,101	265,746
Impairment expense	1,613	899,039	620,889
Other operating expenses	4,233	4,430	4,118
Total costs and expenses	767,222	1,538,925	1,245,872
Gain on sale of oil and natural gas properties, net	93,482	0	0
Operating income (loss)	720,335	(861,733)	(408,591)
Non-operating income (expense):
Gain (loss) on derivatives, net	(452,175)	80,114	79,151
Interest expense	(113,385)	(105,009)	(61,547)
Litigation settlement	0	0	42,500
Gain on extinguishment of debt, net	0	8,989	0
Loss on disposal of assets, net	(8,931)	(963)	(248)
Write-off of debt issuance costs	0	(1,103)	(935)
Other income, net	2,809	1,586	4,623
Total non-operating income (expense), net	(571,682)	(16,386)	63,544
Income (loss) before income taxes	148,653	(878,119)	(345,047)
Income tax (expense) benefit:
Current	(1,324)	0	0
Deferred	(2,321)	3,946	2,588
Total income tax (expense) benefit	(3,645)	3,946	2,588
Net income (loss)	$ 145,008	$ (874,173)	$ (342,459)
Net income (loss) per common share:
Basic (USD per share)	$ 10.18	$ (74.92)	$ (29.61)
Diluted (USD per share)	$ 10.03	$ (74.92)	$ (29.61)
Weighted-average common shares outstanding:
Basic (shares)	14,240	11,668	11,565
Diluted (shares)	14,464	11,668	11,565
Oil sales
Revenues:
Total revenues	$ 805,448	$ 367,792	$ 572,918
NGL sales
Revenues:
Total revenues	191,591	78,246	100,330
Natural gas sales
Revenues:
Total revenues	150,104	50,317	33,300
Midstream service revenues
Revenues:
Total revenues	6,629	8,249	11,928
Costs and expenses:
Costs of goods and services sold	3,707	3,762	4,486
Sales of purchased oil
Revenues:
Total revenues	240,303	172,588	118,805
Costs and expenses:
Costs of goods and services sold	251,061	194,862	122,638
Transportation and marketing expenses
Costs and expenses:
Costs of goods and services sold	$ 47,916	$ 49,927	$ 25,397