Financial Statements Details - Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Movement in Deferred Revenue [Roll Forward]
Deferred revenue, beginning balance	$ 456,054	$ 498,740	[1]
Less: Revenue recognized from beginning balance	(112,998)	(238,557)
Add: Deferral of revenue in current period, excluding amounts recognized during the period	105,588	188,461
Deferred revenue, ending balance	$ 448,644	$ 448,644

[1] The beginning balance of the six months ended June 30, 2018 excludes the $16.5 million that was reclassified to other current liabilities and other long-term liabilities at January 1, 2018 as a result of our adoption of ASC 606. See Note 1 for details.