Deferred Revenue and Customer Advances (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Jul. 03, 2016	Dec. 31, 2015	Oct. 04, 2015	Jul. 05, 2015	Dec. 31, 2014
Deferred Revenue Arrangement
Extended warranty	$ 48,351	$ 47,723	$ 46,499	$ 47,489	$ 43,299	$ 43,300
Product maintenance and training	38,109		30,616
Customer advances	4,865		17,456
Undelivered elements and other	73,927		16,701
Total deferred revenue and customer advances	$ 165,252		$ 111,272