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Asset Retirement Obligations - Changes in AROs (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Changes in our AROs:    
AROs at beginning of year $ 62,947 $ 61,356
Revisions in estimates   (4,010)
Accretion expense 4,319 4,224
AROs at end of period $ 67,266 $ 61,570