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

9 Months Ended

Sep. 30, 2017

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 September 30,						Nine Months Ended September 30,						Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016			2017			2016			2017			2016
Service Cost	$	1,129		$	1,041		$	3,388		$	3,285		$	1,434		$	1,866		$	4,301		$	5,599
Interest Cost	1,013			1,053			3,038			3,230			580			625			1,740			1,875
Amortization of Actuarial Gain	(1,908		)	(1,188		)	(5,724		)	(3,759		)	(150		)	(99		)	(449		)	(297		)
Administrative Fees	151			—			454			—			135			776			405			2,441
State Administrative Fees and Insurance Bond Premiums	—			—			—			—			609			—			1,969			—
Curtailment Gain	—			—			—			(1,307		)	—			—			—			—
Net Periodic Benefit Cost	$	385		$	906		$	1,156		$	1,449		$	2,608		$	3,168		$	7,966		$	9,618