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Pro Forma Adjustments and Assumptions - Additional Information (Details)
$ in Thousands
 1 Months Ended 9 Months Ended 11 Months Ended 12 Months Ended
Oct. 21, 2021
USD ($)
May 03, 2021
USD ($)
Nov. 19, 2020
USD ($)
Dec. 31, 2020
USD ($)
$ / bbl
Sep. 30, 2021
USD ($)
$ / bbl
Nov. 19, 2020
USD ($)
Dec. 31, 2020
USD ($)
$ / bbl
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2021
USD ($)
Pro Forma Adjustments And Assumptions [Line Items]                    
Total cash paid $ 511,296 $ 585,802                
Transaction costs   4,123                
Accrued liabilities, estimated MVC   5,508                
General and administrative expenses       $ 14,224 $ 60,461 $ 145,294   $ 143,506 $ 121,346  
Depletion rate (in dollars per Boe) | $ / bbl       8.47 8.47   8.47      
Other property, plant, and equipment expense, other         $ 300   $ 300      
Asset retirement obligation, accretion expense         600   800      
Increase (decrease) in general and administrative expenses   (1,800)                
Fresh start adjustment, net loss attributable to non controlling interests             86,800      
Reorganization adjustment, net income attributable to non controlling interests             9,100      
Unamortized prepaid cash incentive           4,200        
Gain (loss) on debt discharge     $ 964,569     28,014        
Gain (loss) on revaluation adjustments           92,901        
Loss on revaluation adjustments     (225,336)              
Write-off of unamortized debt discount     (38,373)              
Professional fees     (16,352)              
Write-off of unamortized deferred financing costs     (12,739)              
Debtor-in-possession credit facility fees     (5,853)              
Total reorganization items, net     $ 665,916     120,915        
Reorganization adjustment, income tax expense           9,700        
Fresh start adjustment, income tax benefit           6,400        
General and Administrative Expense                    
Pro Forma Adjustments And Assumptions [Line Items]                    
Transaction costs         1,800          
Restricted Stock                    
Pro Forma Adjustments And Assumptions [Line Items]                    
Share-based compensation, immediate vesting, amount           6,700        
Performance Shares                    
Pro Forma Adjustments And Assumptions [Line Items]                    
Share-based compensation, immediate vesting, amount           4,700        
Phantom Share Units (PSUs)                    
Pro Forma Adjustments And Assumptions [Line Items]                    
Share-based compensation, immediate vesting, amount           $ 1,000        
Oasis Senior Notes | Unsecured Debt                    
Pro Forma Adjustments And Assumptions [Line Items]                    
Interest expense         11,100   25,500      
Deferred financing cost       $ 1,600 700   1,600      
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Permian Basin Sale                    
Pro Forma Adjustments And Assumptions [Line Items]                    
Gain on sale of properties         227,400          
Forecast                    
Pro Forma Adjustments And Assumptions [Line Items]                    
Transaction costs                   $ 2,300
2021 Williston Acquisition                    
Pro Forma Adjustments And Assumptions [Line Items]                    
Total cash paid $ 511,300 $ 74,506                
2021 Williston Acquisition | Additional Employees                    
Pro Forma Adjustments And Assumptions [Line Items]                    
General and administrative expenses         $ 2,800   $ 3,700