Net Loss per Share - Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net loss used to compute net loss per share, basic and diluted	$ (121,480)	$ (151,273)	$ (405,226)	$ (331,152)
Denominator:
Weighted-average number of shares used in computing net loss per share, basic	97,052	92,558	96,408	89,130
Weighted-average number of shares used in computing net loss per share, diluted	97,052	92,558	96,408	89,130
Net loss per share, basic (in dollars per share)	$ (1.25)	$ (1.63)	$ (4.20)	$ (3.72)
Net loss per share, diluted (in dollars per share)	$ (1.25)	$ (1.63)	$ (4.20)	$ (3.72)
Convertible Notes
Denominator:
Convertible, If-converted value in excess of principal			$ 81,300