Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2017

Retirement Benefits [Abstract]

Net pension cost

Net pension cost for the three and nine months months ended September 30, 2017 and October 1, 2016 includes the following components (in thousands):

	Pension Benefits						Pension Benefits
	Three Months Ended						Nine Months Ended
	September 30, 2017			October 1, 2016			September 30, 2017			October 1, 2016
Service cost	$	759		$	599		$	2,244		$	1,921
Interest cost	1,672			1,702			5,020			5,217
Expected return on plan assets	(1,799		)	(1,886		)	(5,377		)	(5,661		)
Amortization of prior service cost	9			8			27			22
Amortization of net loss	1,204			1,168			3,610			3,502
Curtailment gain	—			(62		)	—			(1,285		)
Settlement gain	—			—			—			(123		)
Net pension cost	$	1,845		$	1,529		$	5,524		$	3,593