Condensed Consolidated Statement of Convertible Preferred Stock and Stockholders' Equity - USD ($) $ in Thousands	Total	Series A convertible preferred stock:	Common stock and additional paid-in-capital:	Common stock and additional paid-in-capital: Cumulative Effect, Period of Adoption, Adjustment	Treasury stock:	Accumulated other comprehensive income (loss):	Accumulated deficit:	Accumulated deficit: Cumulative Effect, Period of Adoption, Adjustment
Beginning balance at Dec. 31, 2020	$ 732,905		$ 3,623,268		$ (80,000)	$ 3,834	$ (2,814,196)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for equity awards, net of tax withholdings			3,599
Shares withheld for taxes			(9,725)
Issuance of common stock related to employee stock purchase plan			12,335
Shares repurchased			(68,334)
Accretion of series A convertible preferred stock			(82)
Dividends on series A convertible preferred stock			(9,075)
Stock-based compensation			101,612
Net unrealized loss on investments	(2,415)					(2,415)
Net loss	(115,342)						(115,342)
Ending balance at Jun. 30, 2021	645,479		3,653,598		(80,000)	1,419	(2,929,538)
Beginning balance at Dec. 31, 2020		$ 401,050
Increase (Decrease) in Temporary Equity [Roll Forward]
Dividends on series A convertible preferred stock	$ 9,075	9,075
Ending balance at Jun. 30, 2021		410,125
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2020-06 [Member]
Beginning balance at Dec. 31, 2020	$ 732,905		3,623,268		(80,000)	3,834	(2,814,196)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of series A convertible preferred stock	(100)
Ending balance at Dec. 31, 2021	1,531,240		3,511,467	$ (271,457)	(80,000)	(2,172)	(1,898,055)	$ 202,308
Beginning balance at Dec. 31, 2020		401,050
Ending balance at Dec. 31, 2021	419,404	419,404
Beginning balance at Mar. 31, 2021	715,131		3,657,934		(80,000)	2,040	(2,864,842)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for equity awards, net of tax withholdings			2,502
Shares withheld for taxes			(926)
Issuance of common stock related to employee stock purchase plan			12,335
Shares repurchased			(68,334)
Dividends on series A convertible preferred stock			(4,563)
Stock-based compensation			54,650
Net unrealized loss on investments	(621)					(621)
Net loss	(64,696)						(64,696)
Ending balance at Jun. 30, 2021	645,479		3,653,598		(80,000)	1,419	(2,929,538)
Beginning balance at Mar. 31, 2021		405,562
Increase (Decrease) in Temporary Equity [Roll Forward]
Dividends on series A convertible preferred stock		4,563
Ending balance at Jun. 30, 2021		410,125
Beginning balance at Dec. 31, 2021	1,531,240		3,511,467	$ (271,457)	(80,000)	(2,172)	(1,898,055)	$ 202,308
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for equity awards, net of tax withholdings			1,659
Shares withheld for taxes			(7,336)
Issuance of common stock related to employee stock purchase plan			9,981
Shares retired			(80,000)		80,000
Accretion of series A convertible preferred stock	0
Dividends on series A convertible preferred stock			(9,490)
Stock-based compensation			83,379
Net unrealized loss on investments	(15,774)					(15,774)
Net loss	(182,505)						(182,505)
Ending balance at Jun. 30, 2022	1,342,005		3,238,203		0	(17,946)	(1,878,252)
Beginning balance at Dec. 31, 2021	419,404	419,404
Increase (Decrease) in Temporary Equity [Roll Forward]
Dividends on series A convertible preferred stock	9,490	9,490
Ending balance at Jun. 30, 2022	428,894	428,894
Beginning balance at Mar. 31, 2022	1,389,430		3,271,064		(80,000)	(13,873)	(1,787,761)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for equity awards, net of tax withholdings			141
Shares withheld for taxes			(1,502)
Issuance of common stock related to employee stock purchase plan			9,981
Shares retired			(80,000)		80,000
Dividends on series A convertible preferred stock			(4,772)
Stock-based compensation			43,291
Net unrealized loss on investments	(4,073)					(4,073)
Net loss	(90,491)						(90,491)
Ending balance at Jun. 30, 2022	1,342,005		$ 3,238,203		$ 0	$ (17,946)	$ (1,878,252)
Beginning balance at Mar. 31, 2022		424,122
Increase (Decrease) in Temporary Equity [Roll Forward]
Dividends on series A convertible preferred stock		4,772
Ending balance at Jun. 30, 2022	$ 428,894	$ 428,894