Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Jun. 28, 2020	Sep. 27, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal						$ 1,414	$ 0	$ 0
State						0	0	0
Foreign						9,035	6,507	6,991
Total current expense (benefit)						10,449	6,507	6,991
Deferred
Federal						(8,181)	(15,638)	(9,652)
State						0	0	0
Foreign						0	0	0
Total deferred (benefit) expense						(8,181)	(15,638)	(9,652)
Provision for income taxes	$ 4,194	$ 3,752	$ (9,529)	$ (5,776)	$ (1,582)	$ 2,268	$ (9,131)	$ (2,661)