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Marketable Securities - Summary of Cash Equivalents and Marketable Securities Recorded at Fair Value (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Marketable Securities [Line Items] |  |
Cash equivalents, amortized cost | $ 104,308 | $ 191,721
Cash equivalents, gross unrealized gains | 0 | 0
Cash equivalents, gross unrealized losses | (9) | 0
Cash equivalents, fair value | 104,299 | 191,721
Marketable securities, amortized cost | 1,589,245 | 1,304,304
Total marketable securities, amortized cost | 1,599,632 |
Marketable securities, gross unrealized gains | 3,960 | 3,821
Total marketable securities, gross unrealized gains | 8,560 |
Marketable securities, gross unrealized losses | (2,128) | (1,937)
Total marketable securities, gross unrealized losses | (2,623) |
Marketable securities, fair value | 1,591,077 | 1,306,188
Total marketable securities, fair value | 1,605,569 |
Cash equivalents and marketable securities, amortized cost | 1,703,940 | 1,496,025
Cash equivalents and marketable securities, gross unrealized gains | 8,560 | 3,821
Cash equivalents and marketable securities, gross unrealized losses | (2,632) | (1,937)
Cash equivalents and marketable securities, fair value | 1,709,868 | 1,497,909
Money Market Funds [Member] |  |
Marketable Securities [Line Items] |  |
Cash equivalents, amortized cost | 74,155 | 185,990
Cash equivalents, gross unrealized gains | 0 | 0
Cash equivalents, gross unrealized losses | 0 | 0
Cash equivalents, fair value | 74,155 | 185,990
US Treasury Securities [Member] |  |
Marketable Securities [Line Items] |  |
Cash equivalents, amortized cost |  | 5,731
Cash equivalents, gross unrealized gains |  | 0
Cash equivalents, gross unrealized losses |  | 0
Cash equivalents, fair value |  | 5,731
Marketable securities, amortized cost | 5,936 | 22,963
Marketable securities, gross unrealized gains | 2 | 45
Marketable securities, gross unrealized losses | 0 | 0
Marketable securities, fair value | 5,938 | 23,008
Corporate Debt Securities [Member] |  |
Marketable Securities [Line Items] |  |
Cash equivalents, amortized cost | 882 |
Cash equivalents, gross unrealized gains | 0 |
Cash equivalents, gross unrealized losses | 0 |
Cash equivalents, fair value | 882 |
Marketable securities, amortized cost | 1,136,255 | 883,550
Marketable securities, gross unrealized gains | 3,442 | 3,367
Marketable securities, gross unrealized losses | (1,592) | (1,559)
Marketable securities, fair value | 1,138,105 | 885,358
Certificates of Deposit [Member] |  |
Marketable Securities [Line Items] |  |
Marketable securities, amortized cost | 52,372 | 47,282
Marketable securities, gross unrealized gains | 0 | 0
Marketable securities, gross unrealized losses | 0 | 0
Marketable securities, fair value | 52,372 | 47,282
Government-sponsored Enterprise Securities [Member] |  |
Marketable Securities [Line Items] |  |
Marketable securities, amortized cost | 266,877 | 195,106
Marketable securities, gross unrealized gains | 482 | 377
Marketable securities, gross unrealized losses | (497) | (352)
Marketable securities, fair value | 266,862 | 195,131
Commercial Paper [Member] |  |
Marketable Securities [Line Items] |  |
Cash equivalents, amortized cost | 29,271 |
Cash equivalents, gross unrealized gains | 0 |
Cash equivalents, gross unrealized losses | (9) |
Cash equivalents, fair value | 29,262 |
Marketable securities, amortized cost | 127,805 | 155,403
Marketable securities, gross unrealized gains | 34 | 32
Marketable securities, gross unrealized losses | (39) | (26)
Marketable securities, fair value | 127,800 | $ 155,409
Corporate Equity Securities [Member] |  |
Marketable Securities [Line Items] |  |
Total marketable securities, amortized cost | 10,387 |
Total marketable securities, gross unrealized gains | 4,600 |
Total marketable securities, gross unrealized losses | (495) |
Total marketable securities, fair value | $ 14,492 |

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