Balance Sheet Components (Schedule of Other Accrued Liabilities) (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
	Jan. 01, 2018	Sep. 30, 2018		Oct. 01, 2017	Sep. 30, 2018		Oct. 01, 2017	Dec. 31, 2017
Balance Sheet Related Disclosures [Abstract]
Sales and marketing		$ 116,901			$ 116,901			$ 96,153
Warranty obligation		18,526	[1]		18,526	[1]		75,824
Sales returns		78,014	[1]		78,014	[1]		0
Freight		8,108			8,108			10,567
Other		60,861			60,861			39,926
Total other accrued liabilities	$ 267,951	282,410			282,410			$ 222,470
Reclassified to sales returns upon adoption of ASC 606	$ 57,900	$ 0		$ 0	$ 57,860	[2]	$ 0

[1] Upon adoption of ASC 606 on January 1, 2018, certain warranty reserve balances totaling $57.9 million were reclassified to sales returns as these liabilities are payable to the Company's customers and settled in cash or by credit on account. Under ASC 606, these amounts are to be accounted for as sales with right of return.

[2] Upon adoption of ASC 606 on January 1, 2018, certain warranty reserve balances totaling $57.9 million were reclassified to sales returns as these liabilities are payable to the Company's customers and settled in cash or by credit on account. Under ASC 606, these amounts are to be accounted for as sales with right of return.