Pensions and Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2019

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Plan Cost

The composition of the net periodic benefit cost for the nine months ended September 30, 2019 and 2018, was as follows:

	Pension plans		Other postretirement benefits
(in thousands)	2019	2018	2019	2018
Components of net periodic benefit cost:
Service cost	$1,892	$2,085	$142	$174
Interest cost	5,368	5,430	1,585	1,520
Expected return on assets	(6,155)	(6,702)	—	—
Curtailment gain	—	(750)	—	—
Amortization of prior service cost/(credit)	51	25	(3,366)	(3,366)
Amortization of net actuarial loss	1,687	1,665	1,670	2,217
Net periodic benefit cost	$2,843	$1,753	$31	$545