Deferred Revenue and Customer Advances (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Deferred Revenue Arrangement
Extended warranty	$ 40,052	$ 33,949	$ 34,909	$ 34,854	$ 28,599	$ 26,987
Equipment maintenance and training	26,535		22,455
Customer advances	8,926		4,825
Undelivered elements	5,831		6,971
Customer acceptance	1,616
Total deferred revenue and customer advances	$ 82,960		$ 69,160