Accrued Warranty (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012
Accrued Warranty [Line Items]
Balance at beginning of the period	$ 2,777	$ 3,035
Provision charged to cost of sales	1,399	1,958
Acquisition related warranty accrual	998
Use of provision	(1,517)	(2,191)
Foreign currency exchange rate changes	1	50
Balance at end of period	$ 3,658	$ 2,852