Deferred Revenue and Customer Advances (Tables)

6 Months Ended

Jun. 28, 2020

Revenue Recognition and Deferred Revenue [Abstract]

Deferred Revenue and Customer Advances

Deferred revenue and customer advances consist of the following and are included in short and long-term deferred revenue and customer advances on the balance sheet:

	June 28, 2020		December 31, 2019
	(in thousands)
Maintenance, service and training	$	75,144	$	63,815
Extended warranty		40,178		30,677
Customer advances, undelivered elements and other		64,536		56,358
Total deferred revenue and customer advances	$	179,858	$	150,850