Note 6 - Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Changes in Accumulated Postemployment Benefit Obligations [Table Text Block]

	CWP								Workers' Compensation
	Three Months Ended				Nine Months Ended				Three Months Ended						Nine Months Ended
	September 30,				September 30,				September 30,						September 30,
	2021		2020		2021		2020		2021			2020			2021			2020
Service Cost	$	1,115	$	1,150	$	3,345	$	3,452	$	1,059		$	1,569		$	3,177		$	4,707
Interest Cost		1,178		1,552		3,533		4,655		282			461			846			1,383
Amortization of Actuarial Loss (Gain)		2,091		1,401		6,273		4,203		(45	)		(122	)		(135	)		(366	)
State Administrative Fees and Insurance Bond Premiums		—		—		—		—		445			583			1,357			1,665
Net Periodic Benefit Cost	$	4,384	$	4,103	$	13,151	$	12,310	$	1,741		$	2,491		$	5,245		$	7,389