Commitments and Contingencies (Tables)

3 Months Ended

Apr. 03, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of Product Warranty Liability

Changes in the product warranty accrual are summarized as follows:

	Three months ended
	April 3, 2015			March 28, 2014
	(in thousands)
Balance, beginning of period	$	3,970		5,326
Payments made or service provided	(520		)	(621		)
Warranty expense	467			682
Foreign currency translation	(97		)	2
Balance, end of period	$	3,820		$	5,389