Balance Sheet Components - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 22,484	$ 18,321	$ 19,975	$ 16,906
Provision for credit losses	1,325	(10)	3,566	1,661
Charge offs, net of recoveries	(907)	2,764	(639)	2,508
Balance at end of period	$ 22,902	$ 21,075	$ 22,902	$ 21,075