Extended Product Warranty Included in Short and Long-Term Deferred Revenue and Customer Advances (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Schedule of Accrued Liabilities [Line Items]
Balance at beginning of period	$ 40,052	$ 34,854	$ 34,909	$ 26,987
Deferral of new extended warranty revenue	9,896	5,586	24,218	17,791
Recognition of extended warranty deferred revenue	(6,451)	(4,120)	(15,630)	(8,458)
Balance at end of period	$ 43,497	$ 36,320	$ 43,497	$ 36,320