Pensions and Other Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The composition of the net periodic benefit cost for the six months ended June 30, 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	$	1,090	$	1,148	$	66	$	100
Interest cost	2,674		3,071		551		857
Expected return on assets	(3,211)		(3,415)		—		—
Settlement	—		145		—		—
Curtailment	—		233		—		—
Amortization of prior service cost/(credit)	7		16		(2,244)		(2,244)
Amortization of net actuarial loss	1,087		1,180		1,130		1,296
Net periodic benefit cost	$	1,647	$	2,378	$	(497)	$	9