Extended Product Warranty Included in Short and Long-Term Deferred Revenue and Customer Advances (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 04, 2015	Sep. 28, 2014	Oct. 04, 2015	Sep. 28, 2014
Product Warranty Liability [Line Items]
Balance at beginning of period	$ 43,299	$ 40,052	$ 43,300	$ 34,909
Acquisition			699
Deferral of new extended warranty revenue	10,442	9,896	22,818	24,218
Recognition of extended warranty deferred revenue	(6,252)	(6,451)	(19,328)	(15,630)
Balance at end of period	$ 47,489	$ 43,497	$ 47,489	$ 43,497