COMPONENTS OF COAL WORKERS’ PNEUMOCONIOSIS (CWP) AND WORKERS’ COMPENSATION NET PERIODIC BENEFIT COSTS (Tables)

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Benefit Cost

Components of Net Periodic Benefit Cost are as follows:

	CWP						Workers' Compensation
	Three Months Ended March 31,						Three Months Ended March 31,
	2018			2017			2018			2017
Service Cost	$	1,662		$	1,280		$	1,558		$	1,568
Interest Cost	1,311			1,013			571			580
Amortization of Actuarial Gain	(213		)	(1,908		)	(20		)	(149		)
State Administrative Fees and Insurance Bond Premiums	—			—			593			783
Net Periodic Benefit Cost	$	2,760		$	385		$	2,702		$	2,782