Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenue	$ 665,930	$ 613,210	$ 1,240,815	$ 1,098,440
Costs and expenses:
Cost of revenue	164,896	127,819	310,966	261,289
Research and development	233,508	181,731	429,056	353,459
Sales and marketing	212,037	164,340	385,990	294,662
General and administrative	89,994	68,122	152,973	140,740
Total costs and expenses	700,435	542,012	1,278,985	1,050,150
Income (loss) from operations	(34,505)	71,198	(38,170)	48,290
Interest income	3,365	1,125	4,453	2,617
Interest expense and other income (expense), net	(9,252)	337	(10,828)	(1,226)
Income (loss) before provision for income taxes	(40,392)	72,660	(44,545)	49,681
Provision for income taxes	2,684	3,243	3,812	1,938
Net income (loss)	$ (43,076)	$ 69,417	$ (48,357)	$ 47,743
Net income (loss) per share, basic (in dollars per share)	$ (0.07)	$ 0.11	$ (0.07)	$ 0.08
Net income (loss) per share, diluted (in dollars per share)	$ (0.07)	$ 0.10	$ (0.07)	$ 0.07
Basic weighted-average shares used in computing net income (loss) per share (in shares)	662,242	636,190	659,585	632,413
Weighted-average shares used in computing net income (loss) per share, diluted (in shares)	662,242	692,364	659,585	692,223