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Miscellaneous Other Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Other Income and Expenses [Abstract]      
Interest Income $ 19,223 $ 13,597 $ 6,031
Royalty Income - Non-Operated Coal 18,379 8,855 10,258
Contract Assessments 15,000 16,350 0
Rental Income 1,916 2,129 2,239
Other 26,154 12,330 5,826
Miscellaneous Other Income $ 80,672 $ 53,261 $ 24,354