Extended Product Warranty Included in Short and Long-Term Deferred Revenue and Customer Advances (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Schedule of Accrued Liabilities [Line Items]
Balance at beginning of period	$ 34,909	$ 28,042
Deferral of new extended warranty revenue	2,361	3,505
Recognition of extended warranty deferred revenue	(3,321)	(2,000)
Balance at end of period	$ 33,949	$ 29,547