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Accounting Policies - Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Beginning balance $ 6,476 $ 6,015
Liabilities acquired 2,261 0
Accretion expense 596 461
Ending balance $ 9,333 $ 6,476