Loss Per Share - Schedule of Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended					9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net loss	$ (122,224)	$ (123,681)	$ (113,229)	$ (100,678)	$ (146,872)	$ (349,031)	$ (360,779)
Weighted average shares outstanding, basic	88,645		76,047			88,204	75,543
Weighted average shares outstanding, diluted	88,645		76,047			88,204	75,543
Net loss per share, basic	$ (1.38)		$ (1.49)			$ (3.96)	$ (4.78)
Net loss per share, diluted	$ (1.38)		$ (1.49)			$ (3.96)	$ (4.78)