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Acquisitions and Disposal of Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Feb. 05, 2021
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Assets and Liabilities Held for Sale [Line Items]          
Proceeds from sale of assets   $ 59 $ 37,238    
Disposal Group, Held-for-sale, Not Discontinued Operations | North Park Basin, Colorado          
Assets and Liabilities Held for Sale [Line Items]          
Purchase price $ 47,000        
Proceeds from sale of assets 39,700        
Reduction of full cost pool assets 22,000        
Reduction in non-full cost pool assets 4,600        
Gain on sale 19,700       $ 18,900
Gain from release of revenues in suspense 500        
Gain from relief of asset retirement obligations 6,100        
Reduction in oil and gas properties related to NPB $ 26,600        
Decrease in sales price       $ 800