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Other Accrued Liabilities
 12 Months Ended
Dec. 31, 2022
Other Liabilities Disclosure [Abstract]  
Other Accrued Liabilities OTHER ACCRUED LIABILITIES:
 December 31,
 20222021
Subsidence Liability$96,623 $93,871 
Accrued Compensation and Benefits67,893 47,940 
Accrued Other Taxes10,551 8,474 
Accrued Interest7,942 9,042 
Other11,393 19,489 
Current Portion of Long-Term Liabilities:  
Asset Retirement Obligations29,644 27,400 
Postretirement Benefits Other than Pensions22,436 23,638 
Pneumoconiosis Benefits12,723 12,398 
Workers' Compensation10,451 10,205 
Total Other Accrued Liabilities$269,656 $252,457