Deferred Revenue and Customer Advances (Detail) - USD ($) $ in Thousands	Apr. 03, 2016	Dec. 31, 2015	Apr. 05, 2015	Dec. 31, 2014
Deferred Revenue Arrangement
Extended warranty	$ 46,115	$ 46,499	$ 40,704	$ 43,300
Product maintenance and training	31,368	30,616
Customer advances	5,347	17,456
Undelivered elements and other	14,733	16,701
Total deferred revenue and customer advances	$ 97,563	$ 111,272