Financial Statements Details - Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Movement in Deferred Revenue [Roll Forward]
Deferred revenue, beginning balance	$ 650,827	$ 575,288
Less: Revenue recognized from beginning balance	(107,442)	(100,377)
Add: Deferral of revenue in current period, excluding amounts recognized during the period	176,646	121,864
Deferred revenue, ending balance	$ 720,031	$ 596,775