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Fixed Assets and Asset Retirement Obligations (Asset Retirement Obligation Rollforward) (Details)
3 Months Ended
Mar. 31, 2026
USD ($)
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]  
ARO liability balance, December 31, 2025 $ 266,348,000
Accretion expense 2,239,000
Settlements (279,000)
ARO liability balance, March 31, 2026 $ 268,308,000