Other Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Other Liabilities Disclosure [Abstract]

Schedule of Other Accrued Liabilities

	December 31,
	2018		2017
Subsidence Liability	$	83,532	$	88,027
Accrued Payroll and Benefits	12,978		14,689
Litigation	8,235		8,197
Accrued Interest	6,850		10,039
Short-Term Incentive Compensation	6,024		4,729
Accrued Other Taxes	5,050		7,510
Deferred Revenue	151		6,807
Equipment Lease Rental	—		9,865
Longwall Equipment Buyout	—		22,631
Other	15,437		23,900
Current Portion of Long-Term Liabilities:
Postretirement Benefits Other than Pensions	32,345		37,464
Asset Retirement Obligations	31,017		30,480
Workers' Compensation	12,628		13,317
Pneumoconiosis Benefits	12,187		12,972
Total Other Accrued Liabilities	$	226,434	$	290,627