Retirement Plans (Tables)

6 Months Ended

Jul. 02, 2016

Compensation and Retirement Disclosure [Abstract]

Components of defined pension plan costs

Components of net periodic benefit cost for the Company’s pension and other postretirement benefit plans are as follows (in thousands):

	Quarters Ended
	July 2, 2016									July 4, 2015
	Domestic Plans			Foreign Plans			OPEB Plans			Domestic Plans			Foreign Plans			OPEB Plans
Service cost	$	315		$	643		$	3		$	331		$	649		$	2
Interest cost	827			798			32			806			802			44
Expected return on assets	(854		)	(863		)	—			(973		)	(952		)	—
Amortization of unrecognized:
Prior service costs (credits)	3			6			(2		)	3			5			(2		)
Cumulative actuarial net loss (gains)	20			50			(46		)	104			60			(5		)
Net periodic benefit cost	$	311		$	634		$	(13	)	$	271		$	564		$	39

	Six Months Ended
	July 2, 2016									July 4, 2015
	Domestic Plans			Foreign Plans			OPEB Plans			Domestic Plans			Foreign Plans			OPEB Plans
Service cost	$	631		$	1,263		$	6		$	662		$	1,290		$	6
Interest cost	1,654			1,568			63			1,612			1,593			87
Expected return on assets	(1,708		)	(1,695		)	—			(1,946		)	(1,890		)	—
Amortization of unrecognized:
Prior service costs (credits)	6			11			(4		)	6			11			(4		)
Cumulative actuarial net loss (gains)	41			99			(91		)	208			119			(10		)
Net periodic benefit cost	$	624		$	1,246		$	(26	)	$	542		$	1,123		$	79