Financial Statements Details - Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Movement in Deferred Revenue [Roll Forward]
Deferred revenue, beginning balance	$ 575,288	$ 587,227
Less: Revenue recognized from beginning balance	(100,377)	(190,597)
Add: Deferral of revenue in current period, excluding amounts recognized during the period	121,864	139,841
Deferred revenue, ending balance	$ 596,775	$ 536,471