Accrued Warranty (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012
Accrued Warranty [Line Items]
Balance at beginning of the period	$ 2,777	$ 3,035
Provision charged to cost of sales	831	1,578
Acquisition related warranty accrual	998
Use of provision	(976)	(1,699)
Foreign currency exchange rate changes	(47)	18
Balance at end of period	$ 3,583	$ 2,932