Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2020

Defined Benefit Pension Plan [Abstract]

Net Pension Cost (Credit)

	Three Months Ended
	March 31,
(in thousands)	2020		2019
Service cost	$	412	$	317
Interest cost		412		446
Expected return on plan assets		(889)		(750)
Amortization of net actuarial loss		—		88
Net pension cost (credit)	$	(65)	$	101