Note 4 - Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs: (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	CWP								Workers' Compensation
	Three Months Ended				Six Months Ended				Three Months Ended						Six Months Ended
	June 30,				June 30,				June 30,						June 30,
	2022		2021		2022		2021		2022			2021			2022			2021
Service Cost	$	726	$	1,115	$	1,452	$	2,230	$	1,230		$	1,059		$	2,460		$	2,118
Interest Cost		1,265		1,177		2,530		2,355		342			282			684			564
Amortization of Actuarial Loss (Gain)		1,059		2,091		2,119		4,182		(105	)		(45	)		(210	)		(90	)
State Administrative Fees and Insurance Bond Premiums		—		—		—		—		448			444			885			912
Net Periodic Benefit Cost	$	3,050	$	4,383	$	6,101	$	8,767	$	1,915		$	1,740		$	3,819		$	3,504