Net Loss Per Share - Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Net loss, basic	$ (102,628)	$ (72,771)	$ (217,613)	$ (206,304)
Net loss, diluted	$ (102,628)	$ (72,771)	$ (217,613)	$ (206,304)
Net loss per share, basic (in usd per share)	$ (0.84)	$ (0.67)	$ (1.78)	$ (1.95)
Net loss per share, diluted (in usd per share)	$ (0.84)	$ (0.67)	$ (1.78)	$ (1.95)
Weighted-average shares used in computing net loss per share, basic (in shares)	122,447	108,808	122,080	105,752
Weighted-average shares used in computing net loss per share, diluted (in shares)	122,447	108,808	122,080	105,752