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Long-Term Debt - Oasis Credit Facility (Details) - Credit Facility - USD ($)
9 Months Ended
May 21, 2021
Sep. 30, 2021
Oct. 21, 2021
Mar. 22, 2021
Mar. 21, 2021
Dec. 31, 2020
Oasis Credit Facility            
Debt Instrument [Line Items]            
Credit facility borrowing base       $ 500,000,000 $ 575,000,000  
Line of credit facility, current borrowing capacity       $ 450,000,000 $ 575,000,000  
Letters of credit outstanding   $ 1,300,000        
Line of credit facility, remaining borrowing capacity   $ 398,700,000        
Weighted average interest rate (percent)   4.20%        
Oasis Credit Facility | Oasis Guarantors            
Debt Instrument [Line Items]            
Long-term debt, gross   $ 0       $ 260,000,000
Oasis Credit Facility, Fourth Agreement            
Debt Instrument [Line Items]            
Credit facility borrowing base $ 550,000,000          
Covenant terms, percentage of availability 25.00%          
Covenant terms, maximum pro forma leverage ratio 1.5          
Covenant terms, maximum pro forma leverage ratio, subject to default and availability 2.0          
Covenant terms, minimum pro forma leverage ratio subject to default and availability 1.5          
Oasis Credit Facility, Fourth Agreement | 2021 Williston Acquisition            
Debt Instrument [Line Items]            
Increase (decrease) in maximum borrowing capacity $ 250,000,000          
Oasis Credit Facility, Fourth Agreement | Primary Permian Basin Sale            
Debt Instrument [Line Items]            
Increase (decrease) in maximum borrowing capacity $ (100,000,000)          
Oasis Credit Facility, Fifth Agreement | 2021 Williston Acquisition | Subsequent Event            
Debt Instrument [Line Items]            
Credit facility borrowing base     $ 900,000,000      
Elected commitments     $ 450,000,000      
Minimum | LIBOR | Oasis Credit Facility            
Debt Instrument [Line Items]            
Stated interest rate       0.25% 1.00%