Consolidated statements of cash flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ 145,008	$ (874,173)	$ (342,459)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Share-settled equity-based compensation, net	7,675	8,217	8,290
Depletion, depreciation and amortization	215,355	217,101	265,746
Impairment expense	1,613	899,039	620,889
Gain on sale of oil and natural gas properties, net	(93,482)	0	0
Mark-to-market on derivatives:
(Gain) loss on derivatives, net	452,175	(80,114)	(79,151)
Settlements (paid) received for matured derivatives, net	(320,868)	228,221	63,221
Settlements received (paid) for early-terminated commodity derivatives, net	0	6,340	(5,409)
Premiums received (paid) for commodity derivatives	9,041	(51,070)	(9,063)
Amortization of debt issuance costs	5,146	4,321	3,341
Amortization of operating lease right-of-use assets	13,609	13,070	14,563
Gain on extinguishment of debt, net	0	(8,989)	0
Deferred income tax expense (benefit)	2,321	(3,946)	(2,588)
Other, net	13,564	5,332	3,887
Changes in operating assets and liabilities:
Accounts receivable, net	(87,831)	21,117	8,924
Other current assets	(8,767)	6,275	(14,059)
Other noncurrent assets, net	(8,782)	(6,768)	2,327
Accounts payable and accrued liabilities	31,387	(2,242)	(28,983)
Undistributed revenue and royalties	81,201	(8,395)	(16,037)
Other current liabilities	33,331	19,944	(13,968)
Other noncurrent liabilities	4,975	(9,890)	(4,397)
Net cash provided by operating activities	496,671	383,390	475,074
Cash flows from investing activities:
Acquisitions of oil and natural gas properties, net	(763,411)	(35,786)	(199,284)
Capital expenditures:
Oil and natural gas properties	(418,362)	(347,359)	(458,985)
Midstream service assets	(2,849)	(3,171)	(7,910)
Other fixed assets	(5,931)	(4,259)	(2,433)
Proceeds from dispositions of capital assets, net of selling costs	393,742	1,337	6,901
Net cash used in investing activities	(796,811)	(389,238)	(661,711)
Cash flows from financing activities:
Borrowings on Senior Secured Credit Facility	570,000	80,000	275,000
Payments on Senior Secured Credit Facility	(720,000)	(200,000)	(90,000)
Extinguishment of debt	0	(846,994)	0
Proceeds from issuance of common stock, net of offering costs	72,492	0	0
Stock exchanged for tax withholding	(2,596)	(779)	(2,657)
Payments for debt issuance costs	(14,686)	(18,479)	0
Other	2,971	0	0
Net cash provided by financing activities	308,181	13,748	182,343
Net increase (decrease) in cash and cash equivalents	8,041	7,900	(4,294)
Cash and cash equivalents, beginning of period	48,757	40,857	45,151
Cash and cash equivalents, end of period	56,798	48,757	40,857
January 2025 Notes & January 2028 Notes
Cash flows from financing activities:
Issuance of Notes	0	1,000,000	0
July 2029 Notes
Cash flows from financing activities:
Issuance of Notes	$ 400,000	$ 0	$ 0