Accrued Warranty (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Accrued Warranty [Line Items]
Balance at beginning of the period	$ 3,315	$ 2,204
Provision charged to cost of sales	481	257
Acquisition related warranty accrual	90	998
Use of provision	(571)	(366)
Foreign currency exchange rate changes	(5)	(53)
Balance at end of period	$ 3,310	$ 3,040