v3.25.3
Fixed Assets, Mineral Leaseholds, and Asset Retirement Obligations (Narrative) (Details) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Asset Retirement Obligations Details [Line Items]    
Asset retirement obligation balance $ 260,795,000 $ 254,054,000
Accrued Liabilities    
Asset Retirement Obligations Details [Line Items]    
Asset retirement obligation balance $ 25,800,000 $ 25,800,000