Revenues - Narrative (Details) - USD ($) $ in Thousands	Jul. 04, 2021	Apr. 04, 2021	Dec. 31, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Contract with customer, deferred revenues	$ 82,077	$ 83,763	$ 77,648	$ 68,607	$ 69,485	$ 70,070
Contract with customer, deferred revenues, current	57,300
Contract with customer, deferred revenues, noncurrent	24,800
Deferred sales commission	6,200			$ 4,600
Service-Type Warranties
Disaggregation of Revenue [Line Items]
Contract with customer, deferred revenues	11,000
Contract with customer, deferred revenues, current	3,900
Contract with customer, deferred revenues, noncurrent	$ 7,100