CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2019	Oct. 01, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Financial Designation, Predecessor and Successor [Fixed List]	Successor	Predecessor	Predecessor	Predecessor
Net income (loss)	$ (10,460)	$ (1,156,053)	$ 45,959	$ 535,686
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depletion, depreciation and accretion	19,996	90,912	77,527	110,207
Full cost ceiling impairment		985,190
(Gain) loss on sale of oil and natural gas properties			7,235	(721,573)
(Gain) loss on sale of Water Assets	(506)	3,618	(119,003)
Deferred income tax provision (benefit)		(95,791)	95,791
Stock-based compensation, net		(8,035)	15,266	36,757
Unrealized loss (gain) on derivative contracts	18,681	45,834	(84,274)	16,468
Amortization and write-off of deferred loan costs		1,859	1,405	1,795
Amortization of discount and premium		134	288	2,597
Reorganization items, net	(3,615)	108,887		(739)
Loss (gain) on extinguishment of debt				114,931
Other expense (income)	253	535	(1,608)	(3,331)
Change in assets and liabilities:
Accounts receivable	(10,571)	3,781	378	103,166
Prepaids and other	2,911	(6,729)	5,840	(3,688)
Accounts payable and accrued liabilities	(3,035)	(13,873)	22,351	(77,685)
Net cash provided by (used in) operating activities	13,654	(39,731)	67,155	114,591
Cash flows from investing activities:
Oil and natural gas capital expenditures	(43,230)	(167,235)	(475,685)	(331,257)
Proceeds received from sales of oil and natural gas assets		1,247	3,816	2,003,894
Acquisition of oil and natural gas properties		(2,809)	(333,857)	(1,018,546)
Acquisition of other operating property and equipment				(25,538)
Other operating property and equipment capital expenditures		(85,613)	(116,995)	(53,214)
Proceeds received from sale of other operating property and equipment	6		216,083	21,798
Funds held in escrow and other	434	(7)	153	1,455
Net cash provided by (used in) investing activities	(42,790)	(254,417)	(706,485)	598,592
Cash flows from financing activities:
Proceeds from borrowings	36,000	445,234	438,000	1,349,000
Repayments of borrowings	(22,000)	(315,234)	(232,000)	(1,922,826)
Cash payments to Common Holders, Noteholders and Preferred Holders		(4)		(83,653)
Debt issuance costs	(1,471)	(8,764)	(4,334)	(17,799)
Preferred stock issued				400,055
Common stock issued		155,929	63,480
Equity issuance costs and other	(2,503)	(494)	(3,021)	(13,913)
Net cash provided by (used in) financing activities	10,026	276,667	262,125	(289,136)
Net increase (decrease) in cash, cash equivalents and restricted cash	(19,110)	(17,481)	(377,205)	424,047
Cash, cash equivalents and restricted cash at beginning of period	29,385	46,866	424,071	24
Cash, cash equivalents and restricted cash at end of period	10,275	29,385	46,866	424,071
Supplemental cash flow information:
Cash paid (received) for interest	(197)
Cash paid (received) for interest		33,071	37,526	90,835
Cash paid (refunded) for income taxes			(5,000)	1,250
Cash paid for reorganization items	6,913	8,237		739
Disclosure of non-cash investing and financing activities:
Asset retirement obligations	293	2,932	2,217	(29,313)
Accretion of non-cash preferred dividend				48,007
Accrued equity issuance costs	(2,484)	2,503
Accrued debt issuance costs	$ (1,471)	$ 1,471	$ (90)	$ 90