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Other Accrued Liabilities
 6 Months Ended
Jun. 30, 2024
Other Liabilities Disclosure [Abstract]  
Other Accrued Liabilities OTHER ACCRUED LIABILITIES:
June 30,
2024		December 31,
2023
Subsidence Liability$106,811 $105,322 
Accrued Compensation and Benefits37,617 73,763 
Accrued Other Taxes12,031 12,276 
Accrued Interest6,302 6,283 
Deferred Revenue4,278 9,517 
Other8,506 10,457 
Current Portion of Long-Term Liabilities:  
Asset Retirement Obligations33,984 28,571 
Postretirement Benefits Other than Pensions19,267 19,327 
Pneumoconiosis Benefits14,688 15,071 
Workers' Compensation9,577 10,019 
Total Other Accrued Liabilities$253,061 $290,606