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Cash and Cash Equivalents, Restricted Cash and Marketable Securities - Summary of Cash, Cash Equivalents and Marketable Securities (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | $ 486,847 | $ 617,350
Unrealized Gains | 775 | 1,364
Unrealized Losses | (54) | (763)
Estimated Fair Value | 487,568 | 617,951
Total cash and cash equivalents, and marketable securities, Amortized Cost | 647,094 | 713,233
Total cash and cash equivalents, and marketable securities, Fair Value | 647,815 | 713,834
U.S. treasuries |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 201,540 | 199,741
Unrealized Gains | 408 | 460
Unrealized Losses | (13) | (322)
Estimated Fair Value | 201,935 | 199,879
U.S. government agency securities |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 69,202 | 158,605
Unrealized Gains | 126 | 486
Unrealized Losses | (11) | (220)
Estimated Fair Value | 69,317 | 158,871
Corporate debt securities |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 216,105 | 259,004
Unrealized Gains | 241 | 418
Unrealized Losses | (30) | (221)
Estimated Fair Value | 216,316 | 259,201
Cash and cash equivalents: |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 160,247 | 95,883
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 160,247 | 95,883
Cash and cash equivalents: | Cash |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 17,864 | 12,157
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 17,864 | 12,157
Cash and cash equivalents: | Money market funds |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 142,383 | 83,726
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | $ 142,383 | $ 83,726

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