Employee Pension Plans (Tables)

6 Months Ended

Jun. 30, 2018

Employee Pension Plans [Abstract]

Components of Net Periodic Benefit Cost

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2018		2017		2018		2017
Interest cost	$	883	$	975	$	1,766	$	1,950
Expected return on plan assets		(1,077)		(1,088)		(2,154)		(2,176)
Amortization of net loss		513		456		1,026		912
Other		213		213		426		426
Net periodic benefit cost	$	532	$	556	$	1,064	$	1,112