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

9 Months Ended

Sep. 30, 2019

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Benefit Cost

The components of Net Periodic Benefit Cost are as follows:

	CWP										Workers' Compensation
	Three Months Ended September 30,					Nine Months Ended September 30,					Three Months Ended September 30,						Nine Months Ended September 30,
	2019		2018			2019		2018			2019			2018			2019			2018
Service Cost	$	948	$	1,662		$	2,844	$	4,987		$	1,421		$	1,558		$	4,264		$	4,673
Interest Cost	1,750		1,311			5,250		3,934			646			571			1,939			1,712
Amortization of Actuarial Loss (Gain)	254		(213		)	762		(640		)	(193		)	(20		)	(580		)	(59		)
State Administrative Fees and Insurance Bond Premiums	—		—			—		—			510			675			1,671			1,986
Net Periodic Benefit Cost	$	2,952	$	2,760		$	8,856	$	8,281		$	2,384		$	2,784		$	7,294		$	8,312