Employee Pension Plans (Tables)

9 Months Ended

Sep. 30, 2015

Employee Pension Plans [Abstract]

Components of Net Periodic Benefit Cost

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
	(in thousands)				(in thousands)
Interest cost	$	1,008	$	1,030	$	3,030	$	3,090
Expected return on plan assets		(1,256)		(1,192)		(3,768)		(3,576)
Amortization of net loss		(1,417)		1,077		1,503		3,231
Net periodic benefit cost	$	(1,665)	$	915	$	765	$	2,745