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Asset Retirement Obligations - Changes in AROs (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Changes in our AROs:    
AROs at beginning of year $ 51,956 $ 29,658
Accretion expense 1,168 741
AROs at end of period $ 53,124 $ 30,399