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Cash, Cash Equivalents, Restricted Cash And Investments - Summary of Unrealized Gains and Losses and Estimated Fair Value of Cash Equivalents and Investments (Detail) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Cash and Cash Equivalents [Line Items] |  |
Amortized Cost | $ 699,823 | $ 366,111
Gross Unrealized Gains | 224 | 341
Gross Unrealized Losses | (221) | (171)
Estimated Fair Value | 699,826 | 366,281
Cash and money market funds [Member] |  |
Cash and Cash Equivalents [Line Items] |  |
Amortized Cost | 24,871 | 33,204
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 24,871 | 33,204
Corporate Notes And Bonds [Member] |  |
Cash and Cash Equivalents [Line Items] |  |
Amortized Cost | 13,923 | 45,823
Gross Unrealized Gains | 14 | 22
Gross Unrealized Losses | (5) | (53)
Estimated Fair Value | 13,932 | 45,792
US Government Corporations and Agencies Securities [Member] |  |
Cash and Cash Equivalents [Line Items] |  |
Amortized Cost | 661,029 | 287,084
Gross Unrealized Gains | 210 | 319
Gross Unrealized Losses | (216) | (118)
Estimated Fair Value | $ 661,023 | $ 287,285

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