Extended Product Warranty Included in Short and Long-Term Deferred Revenue and Customer Advances (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 05, 2015	Jun. 29, 2014	Jul. 05, 2015	Jun. 29, 2014
Product Warranty Liability [Line Items]
Balance at beginning of period	$ 40,704	$ 33,949	$ 43,300	$ 34,909
Acquisition	699		699
Deferral of new extended warranty revenue	8,172	11,960	12,376	14,321
Recognition of extended warranty deferred revenue	(6,276)	(5,857)	(13,076)	(9,178)
Balance at end of period	$ 43,299	$ 40,052	$ 43,299	$ 40,052