Accrued Warranty (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2012	Jul. 01, 2011
Accrued Warranty [Line Items]
Balance at beginning of the period	$ 3,035	$ 3,174
Provision charged to cost of goods sold	1,578	1,032
Use of provision	(1,699)	(1,302)
Foreign currency exchange rate changes	18	67
Balance at end of period	$ 2,932	$ 2,971