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Asset Retirement Obligations - Summary of Changes in Asset Retirement Obligations (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]      
Asset retirement obligations at beginning of period $ 91,089    
Liabilities added from acquisition or drilling 0    
Liabilities settled 0    
Liabilities removed upon sale of wells 0    
Accretion of asset retirement obligations 1,513 $ 1,311  
Revision of estimates 0    
Asset retirement obligation at end of period 92,602    
Less: Current portion (623)   $ (623)
Asset retirement obligations $ 91,979   $ 90,466