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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 1 Months Ended 11 Months Ended 12 Months Ended
Dec. 31, 2020
Nov. 19, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities:        
Net loss including non-controlling interests $ (45,962) $ (3,724,611) $ (90,647) $ (19,500)
Adjustments to reconcile net loss including non-controlling interests to net cash provided by operating activities:        
Depreciation, depletion and amortization 16,094 291,115 787,192 636,296
(Gain) loss on extinguishment of debt 0 (83,867) (4,312) 13,848
(Gain) loss on sale of properties (11) (10,396) 4,455 (28,587)
Impairment 0 4,937,143 10,257 384,228
Deferred income taxes (3,447) (262,926) (32,699) (5,866)
Derivative instruments 84,615 (233,565) 106,314 (28,457)
Equity-based compensation expenses 270 31,315 33,607 29,273
Non-cash reorganization items, net 0 (809,036) 0 0
Deferred financing costs amortization and other 6,824 41,811 27,263 29,057
Working capital and other changes:        
Change in accounts receivable, net 68,322 96,436 13,729 (23,508)
Change in inventory 1,902 (4,005) (5,893) (14,346)
Change in prepaid expenses (2,976) 1,674 325 (2,354)
Change in accounts payable, interest payable and accrued liabilities (24,573) (62,694) 53,051 26,116
Change in other assets and liabilities, net (5,803) (5,458) (9,789) 221
Net cash provided by operating activities 95,255 202,936 892,853 996,421
Cash flows from investing activities:        
Capital expenditures (9,805) (332,007) (869,221) (1,148,961)
Acquisitions 0 0 (21,009) (581,650)
Proceeds from sale of properties 0 15,188 42,376 333,229
Costs related to sale of properties 0 0 0 (2,850)
Derivative settlements (76) 224,416 19,098 (213,528)
Other 0 0 0 224
Net cash used in investing activities (9,881) (92,403) (828,756) (1,613,536)
Cash flows from financing activities:        
Proceeds from revolving credit facilities 29,000 686,189 1,982,000 3,224,000
Principal payments on revolving credit facilities (114,500) (686,189) (1,972,500) (2,586,000)
Repurchase of senior unsecured notes 0 (68,060) (45,790) (423,340)
Proceeds from issuance of senior unsecured notes 0 0 0 400,000
Deferred financing costs 0 (7,260) (1,052) (13,862)
Debtor-in-possession credit facility fees 0 (5,853) 0 0
Proceeds from sale of Oasis Midstream Partners common units, net of offering costs 0 0 0 44,503
Purchases of treasury stock 0 (2,756) (4,856) (6,846)
Distributions to non-controlling interests 0 (24,080) (21,270) (14,114)
Payments on finance lease liabilities (202) (1,989) (2,382) 0
Other 0 0 (418) (1,756)
Net cash provided by (used in) financing activities (85,702) (109,998) (66,268) 622,585
Increase (decrease) in cash, cash equivalents and restricted cash (328) 535 (2,171) 5,470
Cash, cash equivalents and restricted cash:        
Beginning of period 20,554 20,019 22,190 16,720
End of period 20,226 20,554 20,019 22,190
Supplemental cash flow information:        
Cash paid for interest, net of capitalized interest 2,411 152,416 155,833 141,196
Cash paid for income taxes 1 109 111 38
Cash received for income tax refunds 28 282 146 25
Cash paid for reorganization items 0 22,205 0 0
Supplemental non-cash transactions:        
Change in accrued capital expenditures 7,938 (107,725) (82,414) 68,946
Change in asset retirement obligations 377 (10,268) 4,917 3,880
Issuance of shares in connection with acquisition $ 0 $ 0 $ 0 $ 371,220