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Other Accrued Liabilities
 3 Months Ended
Mar. 31, 2024
Other Liabilities Disclosure [Abstract]  
Other Accrued Liabilities OTHER ACCRUED LIABILITIES:
March 31,
2024		December 31,
2023
Subsidence Liability$105,671 $105,322 
Accrued Compensation and Benefits40,208 73,763 
Accrued Income Taxes15,557 — 
Accrued Other Taxes12,742 12,276 
Deferred Revenue7,071 9,517 
Accrued Interest3,120 6,283 
Other8,195 10,457 
Current Portion of Long-Term Liabilities:  
Asset Retirement Obligations28,571 28,571 
Postretirement Benefits Other than Pensions19,297 19,327 
Pneumoconiosis Benefits14,880 15,071 
Workers' Compensation9,666 10,019 
Total Other Accrued Liabilities$264,978 $290,606