Income Taxes - Summary of Income (Loss) Before Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Domestic	$ (541,656)	$ (532,539)	$ (457,693)
Foreign	167	(245)	(199)
Net income (loss) before income tax expense	$ (541,489)	$ (532,784)	$ (457,892)