Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Jul. 04, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued sales incentives	$ 86,856	$ 156,839
Sales returns reserve	81,851	101,326
Product warranty	44,934	52,403
Employee-related liabilities	43,854	37,355
Accrued co-op advertising and marketing development funds	20,291	40,689
Accrued manufacturing expense and freight	18,579	35,112
Accrued research and development	16,015	19,232
Accrued sales and marketing	11,401	26,781
Accrued legal settlements and fees	10,866	8,854
Sales taxes and VAT payable	8,621	19,603
Inventory received but not billed	5,376	1,669
Finance lease liabilities	0	1,384
Derivative liabilities	0	748
Other	9,644	11,535
Accrued liabilities	$ 358,288	$ 513,530