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

3 Months Ended

Mar. 31, 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 March 31,					Three Months Ended March 31,
	2019		2018			2019			2018
Service Cost	$	948	$	1,662		$	1,421		$	1,558
Interest Cost	1,750		1,311			646			571
Amortization of Actuarial Loss (Gain)	254		(213		)	(193		)	(20		)
State Administrative Fees and Insurance Bond Premiums	—		—			587			593
Net Periodic Benefit Cost	$	2,952	$	2,760		$	2,461		$	2,702