WORKERS' COMPENSATION AND PNEUMOCONIOSIS (Tables)

3 Months Ended

Mar. 31, 2020

Accrued Workers Compensation And Pneumoconiosis Benefits

Reconciliation of changes in workers' compensation liability

	Three Months Ended
	March 31,
	2020		2019
	(in thousands)
Beginning balance	$	53,384	$	49,539
Accruals increase		1,748		1,961
Payments		(2,571)		(3,473)
Interest accretion		319		401
Ending balance	$	52,880	$	48,428

Pneumoconiosis benefits

Accrued Workers Compensation And Pneumoconiosis Benefits

Components of net periodic benefit cost

	Three Months Ended
	March 31,
	2020		2019
	(in thousands)
Service cost	$	878	$	645
Interest cost (1)		750		760
Net amortization (1)		(172)		(1,145)
Net periodic benefit cost	$	1,456	$	260

(1) Interest cost and net amortization is included in the Other income (expense) line item within our condensed consolidated statements of income.