Net Loss Per Share - Summary of Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net loss	$ (102,854)	$ (108,483)	$ (160,325)	$ (146,828)	$ (211,337)	$ (307,153)
Denominator:
Weighted average common stock outstanding - basic	60,538,319		59,769,640		60,337,258	59,722,147
Weighted average common stock outstanding - diluted	60,538,319		59,769,640		60,337,258	59,722,147
Net loss per share - basic	$ (1.7)		$ (2.68)		$ (3.5)	$ (5.14)
Net loss per share - diluted	$ (1.7)		$ (2.68)		$ (3.5)	$ (5.14)