Fair Value Measurements - Summary of Company's Cash, Cash Equivalents and Marketable Securities Held to Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Cash and money market funds
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents, Amortized Costs	$ 630,779	$ 523,458
Cash and cash equivalents, Estimated Fair Value	630,779	523,458
Cash and cash equivalents
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents, Amortized Costs	630,779	523,458
Cash and cash equivalents, Estimated Fair Value	$ 630,779	523,458
U.S. treasury bills
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents, Amortized Costs		100,299
Marketable securities, Gross Unrealized Gains		24
Marketable securities, Estimated Fair Value		100,323
Cash equivalents and marketable securities
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents, Amortized Costs		623,757
Marketable securities, Gross Unrealized Gains		24
Marketable securities, Estimated Fair Value		$ 623,781