OTHER ACCRUED LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2018

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities

	September 30, 2018		December 31, 2017
Subsidence Liability	$	90,311	$	88,027
Accrued Payroll and Benefits	16,045		14,689
Accrued Interest	13,305		10,039
Litigation	9,270		8,197
Accrued Other Taxes	5,164		7,510
Short-Term Incentive Compensation	4,862		4,729
Deferred Revenue	155		6,807
Longwall Equipment Buyout	—		22,631
Equipment Lease Rental	—		9,865
Other	18,424		23,900
Current Portion of Long-Term Liabilities:
Postretirement Benefits Other than Pensions	37,238		37,464
Asset Retirement Obligations	31,823		30,480
Workers' Compensation	12,369		13,317
Pneumoconiosis Benefits	10,792		12,972
Total Other Accrued Liabilities	$	249,758	$	290,627