CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2018	Aug. 13, 2018	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 64,122	$ (92,754)	$ (52,417)	$ 96,889
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Deferred and non-current income taxes	29,079	1,052	(9,409)	28,026
Exploration	0	0	27	0
Loss (gain) on sale of oil and gas properties	(155)	35,438	(17)	25
Depreciation, depletion and amortization	53,944	68,032	417,112	276,526
Gain from derivative financial instruments	(10,465)	(881)	(9,951)	(51,735)
Cash settlements of derivative financial instruments	(5,579)	2,842	134,496	52,684
Amortization of debt discount, premium and issuance costs	2,404	29,457	34,038	16,274
Interest paid in-kind	0	25,004	0	0
Stock-based compensation	994	3,912	6,464	4,020
Loss on extinguishment of debt	0	0	861	0
Decrease (increase) in accounts receivable	(61,048)	2,834	34,555	3,220
Decrease (increase) in other current assets	(12,527)	337	7,019	9,823
Increase in accounts payable and accrued expenses	41,533	10,462	12,923	15,485
Net cash provided by operating activities	102,302	85,735	575,701	451,237
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of Covey Park Energy LLC, net of cash acquired	0	0	0	(693,869)
Capital expenditures	(169,786)	(150,106)	(509,690)	(486,781)
Advance payments for drilling costs	(5,644)	(3,692)	(1,795)	9,336
Proceeds from sales of oil and gas properties	13,796	103,593	287	475
Net cash used for investing activities	(161,634)	(50,205)	(511,198)	(1,170,839)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings	450,000	865,577	157,000	927,000
Issuances of senior notes	0	0	751,500	0
Payments to retire debt	(1,291,352)	(49,679)	(907,000)	(127,000)
Repayment of Covey Park Energy LLC preferred equity	0	0	0	(533,390)
Issuance of common stock	0	0	206,626	300,000
Issuance of Series B Convertible Preferred Stock	0	0	0	175,000
Redemption of Series A Preferred Convertible Stock	0	0	(210,000)	0
Preferred stock dividends paid	0	0	(25,580)	(17,832)
Jones Contribution	40,736	0	0	0
Debt and stock issuance costs	(6,351)	(18,127)	(24,617)	(8,617)
Income tax withholdings related to equity awards	(4,695)	(369)	(692)	(220)
Net cash provided by (used for) financing activities	(811,662)	797,402	(52,763)	714,941
Net increase (decrease) in cash and cash equivalents	(870,994)	832,932	11,740	(4,661)
Cash and cash equivalents, beginning of the year	894,187	61,255	18,532	23,193
Cash and cash equivalents, end of the year	$ 23,193	$ 894,187	$ 30,272	$ 18,532