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Asset Retirement Obligation (Details) - USD ($)
$ in Thousands
1 Months Ended 2 Months Ended 3 Months Ended
Feb. 08, 2019
Mar. 31, 2019
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Changes to the Company's asset retirement obligation liability          
Asset retirement obligation, beginning of period   $ 2,486      
Liabilities incurred   0      
Liabilities settled   (50)      
Accretion expense   23      
Revisions in estimates   785      
Divestiture of oil and gas properties   0      
Asset retirement obligation, end of period $ 2,486 3,244 $ 3,244    
Less: current portion of asset retirement obligation   (723) (723)    
Long-term asset retirement obligation   2,521 2,521    
Gulf Of Mexico Properties          
Changes to the Company's asset retirement obligation liability          
Divestiture of oil and gas properties     (28,200)    
Predecessor          
Changes to the Company's asset retirement obligation liability          
Asset retirement obligation, beginning of period 2,480 $ 2,486 $ 2,480 $ 31,310  
Liabilities incurred 0     7  
Liabilities settled (11)     (57)  
Accretion expense 17     198  
Revisions in estimates 0     (2)  
Divestiture of oil and gas properties 0     (28,214)  
Asset retirement obligation, end of period 2,486     3,242  
Less: current portion of asset retirement obligation (183)     (938) $ (183)
Long-term asset retirement obligation $ 2,303     $ 2,304 $ 2,297