Balance Sheet Components - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 19,975	$ 16,906
Provision for credit losses	2,509	1,670
Charge offs, net of recoveries	0	(255)
Balance at end of period	$ 22,484	$ 18,321