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Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Asset retirement obligations, beginning of period $ 23,439  
Additional liabilities incurred 3,584  
Accretion expense 435 $ 345
Liabilities settled upon plugging and abandoning wells (1,059)  
Disposition of wells (66)  
Revision of estimates 2,780  
Asset retirement obligations, end of period $ 29,113