Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2022

Compensation Related Costs [Abstract]

Schedule of Net Periodic Benefit Cost

The following table details the components of the net periodic benefit credit for pension obligations:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Interest cost	$	3,995	$	3,392	$	11,985	$	10,176
Expected return on plan assets	(7,183)		(7,183)		(21,549)		(21,549)
Amortization of net actuarial loss	528		804		1,583		2,413
Net periodic benefit credit	$	(2,660)	$	(2,987)	$	(7,981)	$	(8,960)

The following table details the components of the net periodic benefit cost for black lung obligations:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Service cost	$	654	$	739	$	1,962	$	2,217
Interest cost	665		607		1,995		1,821
Expected return on plan assets	(13)		(14)		(39)		(42)
Amortization of net actuarial loss	209		522		627		1,566
Net periodic benefit cost	$	1,515	$	1,854	$	4,545	$	5,562