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Asset Retirement Obligations (Schedule Of Asset Retirement Obligations) (Details) - USD ($)
$ in Thousands
1 Months Ended 8 Months Ended 9 Months Ended
Sep. 01, 2020
Sep. 30, 2020
Aug. 31, 2020
Sep. 30, 2021
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]        
ARO liability, Beginning Balance: $ 38,984 $ 38,984 $ 66,627 $ 23,356
Fresh-Start adjustments (14,393)      
Accretion of discount   (116) (1,545) (1,381)
Liability incurred   141 465 4
Liability settled   (51) (838) (852)
Liability sold   0 (487) (1,925)
Revision of estimates   125 (28,328) 4,408 [1]
ARO, Ending Balance: $ 24,591 24,922 $ 38,984 26,372
Less: current portion   2,186   2,455
Total long-term ARO   $ 22,736   $ 23,917
[1] Plugging liability estimates were revised in 2021 for updates in the cost of services used to plug wells over the preceding year as well as estimated inflation and discount rates. We had various upward and downward adjustments.