Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued sales incentives	$ 98,812	$ 111,592
Accrued revenue reserve from returns	78,517	0
Product warranty	47,855	87,882
Accrued manufacturing expense and freight	32,738	41,901
Employee-related liabilities	30,949	33,266
Accrued co-op advertising and marketing development funds	19,599	30,408
Accrued sales and marketing	15,325	44,401
Inventory received but not billed	15,218	10,526
Sales taxes and VAT payable	15,191	21,340
Accrued research and development	6,064	8,983
Accrued legal settlements and fees	4,979	36,693
Derivative liabilities	86	2,138
Other	21,051	23,007
Accrued liabilities	$ 386,384	$ 452,137