Net Income (Loss) Per Share - Calculation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Denominator:
Basic weighted-average shares used in computing net income (loss) per share (in shares)	662,242	636,190	659,585	632,413
Diluted weighted-average shares used in computing net income (loss) per share (in shares)	662,242	692,364	659,585	692,223
Basic net income (loss) per share (in dollars per share)	$ (0.07)	$ 0.11	$ (0.07)	$ 0.08
Diluted net income (loss) per share (in dollars per share)	$ (0.07)	$ 0.10	$ (0.07)	$ 0.07
Class A
Numerator:
Net income (loss)	$ (37,288)	$ 59,651	$ (41,845)	$ 40,817
Reallocation of net income as a result of conversion of Class B to Class A common stock	0	9,766	0	6,926
Reallocation of net income to Class B common stock	0	0	0	0
Diluted net income (loss)	$ (37,288)	$ 69,417	$ (41,845)	$ 47,743
Denominator:
Basic weighted-average shares used in computing net income (loss) per share (in shares)	573,255	546,687	570,760	540,666
Conversion of Class B to Class A common stock (in shares)	0	89,504	0	91,747
Weighted average effect of dilutive potential common stock (in shares)	0	56,173	0	59,810
Diluted weighted-average shares used in computing net income (loss) per share (in shares)	573,255	692,364	570,760	692,223
Basic net income (loss) per share (in dollars per share)	$ (0.07)	$ 0.11	$ (0.07)	$ 0.08
Diluted net income (loss) per share (in dollars per share)	$ (0.07)	$ 0.10	$ (0.07)	$ 0.07
Class B
Numerator:
Net income (loss)	$ (5,788)	$ 9,766	$ (6,512)	$ 6,926
Reallocation of net income as a result of conversion of Class B to Class A common stock	0	0	0	0
Reallocation of net income to Class B common stock	0	(792)	0	(598)
Diluted net income (loss)	$ (5,788)	$ 8,974	$ (6,512)	$ 6,328
Denominator:
Basic weighted-average shares used in computing net income (loss) per share (in shares)	88,987	89,504	88,825	91,747
Conversion of Class B to Class A common stock (in shares)	0	0	0	0
Weighted average effect of dilutive potential common stock (in shares)	0	0	0	0
Diluted weighted-average shares used in computing net income (loss) per share (in shares)	88,987	89,504	88,825	91,747
Basic net income (loss) per share (in dollars per share)	$ (0.07)	$ 0.11	$ (0.07)	$ 0.08
Diluted net income (loss) per share (in dollars per share)	$ (0.07)	$ 0.10	$ (0.07)	$ 0.07