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Pro Forma Adjustments and Assumptions - Recognized Identified Assets Acquired and Liabilities Assumed (Details)
$ in Thousands, MMBbls in Millions
 6 Months Ended
Oct. 21, 2021
USD ($)
May 03, 2021
USD ($)
MMBbls
Oct. 21, 2021
USD ($)
Dec. 31, 2021
USD ($)
Pro Forma Adjustments And Assumptions [Line Items]        
Total cash paid $ 511,296 $ 585,802    
Asset retirement obligations   14,850    
Suspended funds   8,997    
Unfavorable contracts   21,724    
Total liabilities assumed   45,571    
Transaction costs   4,123    
Total cost of Williston Basin Acquisition   635,496    
Inventory   4,954    
Oil and Gas properties   620,953    
Other property and equipment   1,315    
Long-term inventory   3,748    
Other assets   4,526    
Total assets   635,496    
Revenues and production taxes payable   (8,997)    
Accrued liabilities   (5,508)    
Other liabilities   (16,216)    
Increase (decrease) in general and administrative expenses   $ (1,800)    
Proved developed reserves (volume) | MMBbls   583.5    
Proved underdeveloped reserves | MMBbls   22.6    
Forecast        
Pro Forma Adjustments And Assumptions [Line Items]        
Transaction costs       $ 2,300
Minimum Volume Commitment Agreement, Unfavorable Contracts        
Pro Forma Adjustments And Assumptions [Line Items]        
Estimated minimum volume commitment   $ 21,700    
2021 Williston Acquisition        
Pro Forma Adjustments And Assumptions [Line Items]        
Total cash paid $ 511,300 74,506    
Total cost of Williston Basin Acquisition   $ 585,800 $ 585,802