Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Class A and Class B Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		626,372
Beginning balance at Dec. 31, 2020	$ 2,242,371	$ 6	$ 4,574,934	$ 2,480	$ (2,335,049)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Release of restricted stock units (in shares)		5,710
Issuance of common stock for cash upon exercise of stock options, net (in shares)		2,997
Issuance of common stock for cash upon exercise of stock options, net	9,344		9,344
Issuance of common stock related to charitable contributions (in shares)		250
Issuance of common stock related to charitable contributions	20,490		20,490
Share-based compensation	79,459		79,459
Other comprehensive loss	(1,167)			(1,167)
Net loss	(21,674)				(21,674)
Ending balance (in shares) at Mar. 31, 2021		635,329
Ending balance at Mar. 31, 2021	2,328,823	$ 6	4,684,227	1,313	(2,356,723)
Beginning balance (in shares) at Dec. 31, 2021		656,872
Beginning balance at Dec. 31, 2021	$ 3,038,743	$ 7	5,059,528	(2,181)	(2,018,611)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Release of restricted stock units (in shares)		4,706
Issuance of common stock for cash upon exercise of stock options, net (in shares)	369	369
Issuance of common stock for cash upon exercise of stock options, net	$ 1,036		1,036
Issuance of restricted stock awards (in shares)		307
Share-based compensation	73,240		73,240
Other comprehensive loss	(8,078)			(8,078)
Net loss	(5,281)				(5,281)
Ending balance (in shares) at Mar. 31, 2022		662,254
Ending balance at Mar. 31, 2022	$ 3,099,660	$ 7	$ 5,133,804	$ (10,259)	$ (2,023,892)