Defined Benefit Pension Plan (Tables)

9 Months Ended

Sep. 30, 2018

Defined Benefit Pension Plan [Abstract]

Net Pension Costs

	Nine Months Ended				Three Months Ended
	September 30,				September 30,
(in thousands)	2018		2017		2018		2017
Service cost	$	1,027	$	911	$	342	$	304
Interest cost		1,190		1,193		396		398
Expected return on plan assets		(2,456)		(2,205)		(818)		(735)
Amortization of net actuarial loss		—		13		—		4
Net pension credit	$	(239)	$	(88)	$	(80)	$	(29)