Pensions and Other Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2021

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The composition of the net periodic benefit cost for the three months ended March 31, 2021 and 2020, was as follows:

	Pension plans				Other postretirement benefits
(in thousands)	2021		2020		2021		2020
Components of net periodic benefit cost:
Service cost	$	545	$	580	$	33	$	50
Interest cost	1,338		1,550		276		428
Expected return on assets	(1,606)		(1,723)		—		—
Amortization of prior service cost/(credit)	3		8		(1,122)		(1,122)
Amortization of net actuarial loss	544		596		565		648
Net periodic benefit cost	$	824	$	1,011	$	(248)	$	4