Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations - Aria Asset Retirement Obligation (Details)

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Asset Retirement Obligations - Aria Asset Retirement Obligation (Details) - USD ($)
$ in Thousands
8 Months Ended 9 Months Ended 12 Months Ended
Sep. 14, 2021
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]        
Beginning Balance $ 306 $ 306 $ 0 $ 0
Accretion expense   18 0  
Ending Balance   3,904   306
Aria Energy LLC        
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]        
Beginning Balance 3,408 $ 3,408 $ 6,536 6,536
Accretion expense 172     456
Revision to estimated cash flows 0     0
Transfer to liabilities classified as held for sale 0     (3,584)
Settlement of asset retirement obligation 0     0
Ending Balance $ 3,580     $ 3,408