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Reclamation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Asset Retirement Obligation Disclosure [Abstract]                
Asset Retirement Obligation $ 276,224 $ 222,090 $ 276,224 $ 222,090 $ 275,032 $ 260,492 $ 219,917 $ 214,013
Asset Retirement Obligation, Accretion Expense, Excluding Held for Sale Disposal Group. 4,988 4,233 14,620 12,463        
Asset Retirement Obligation, Revision of Estimate 0 0 8,644 0        
Asset Retirement Obligation, Liabilities Settled $ (3,796) $ (2,060) $ (7,532) $ (4,386)