Pensions and Other Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2020

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

The composition of the net periodic benefit cost for the six months ended June 30, 2020 and 2019, was as follows:

	Pension plans				Other postretirement benefits
(in thousands)	2020		2019		2020		2019
Components of net periodic benefit cost:
Service cost	$	1,148	$	1,261	$	100	$	95
Interest cost	3,071		3,578		857		1,057
Expected return on assets	(3,415)		(4,102)		—		—
Settlement cost	145		—		—		—
Curtailment cost	233		—		—		—
Amortization of prior service cost/(credit)	16		34		(2,244)		(2,244)
Amortization of net actuarial loss	1,180		1,125		1,296		1,114
Net periodic benefit cost	$	2,378	$	1,896	$	9	$	22