Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Product warranty	$ 50,468	$ 87,882
Accrued revenue reserve from returns	74,996	0
Accrued manufacturing expense and freight	34,493	41,901
Accrued sales incentives	87,756	111,592
Accrued sales and marketing	24,693	44,401
Accrued research and development	4,819	8,983
Accrued co-op advertising and marketing development funds	19,521	30,408
Employee-related liabilities	23,054	33,266
Sales taxes and VAT payable	26,127	21,340
Inventory received but not billed	4,615	10,526
Accrued legal settlements and fees	4,819	36,693
Derivative liabilities	736	2,138
Other	20,961	23,007
Accrued liabilities	$ 377,058	$ 452,137