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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

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