Financial Statements Details - Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Movement in Deferred Revenue [Roll Forward]
Deferred revenue, beginning balance	$ 596,775	$ 536,471	$ 575,288	$ 587,227
Less: Revenue recognized from beginning balance	(104,480)	(119,542)	(178,264)	(253,616)
Add: Deferral of revenue in current period, excluding amounts recognized during the period	85,216	85,289	180,487	168,607
Deferred revenue, ending balance	$ 577,511	$ 502,218	$ 577,511	$ 502,218