Deferred Revenue and Customer Advances (Detail) - USD ($) $ in Thousands	Mar. 29, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Deferred Revenue Arrangement
Maintenance, service and training	$ 68,483	$ 63,815
Extended warranty	33,503	30,677	$ 27,242	$ 27,422
Customer advances, undelivered performance obligations and other	47,620	56,358
Total deferred revenue and customer advances	$ 149,606	$ 150,850