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Cash, Cash Equivalents and Investments - Schedule of Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Cash | $ 878,921 | $ 94,919
Amortized Cost | 2,413,316 | 878,105
Gross Unrealized Gains | 31,527 | 108,312
Gross Unrealized Losses | (7) | (68)
Fair Value | 2,444,836 | 986,349
Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Cash | 878,921 | 94,919
Fair Value | 1,423,871 | 454,844
Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Cash | 0 | 0
Fair Value | 68,179 | 198,270
Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Cash | 0 | 0
Fair Value | 952,786 | 333,235
Level 1: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 616,834 | 504,295
Gross Unrealized Gains | 31,458 | 108,302
Gross Unrealized Losses | 0 | (5)
Fair Value | 648,292 | 612,592
Level 1: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 485,611 | 322,874
Level 1: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 68,179 | 198,270
Level 1: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 94,502 | 91,448
Level 2: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 917,561 | 278,891
Gross Unrealized Gains | 69 | 10
Gross Unrealized Losses | (7) | (63)
Fair Value | 917,623 | 278,838
Level 2: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 59,339 | 37,051
Level 2: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
Level 2: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 858,284 | 241,787
Money market funds | Level 1: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 334,128 | 322,874
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 334,128 | 322,874
Money market funds | Level 1: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 334,128 | 322,874
Money market funds | Level 1: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
Money market funds | Level 1: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
U.S. Treasury bills | Level 1: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 213,516 | 14,431
Gross Unrealized Gains | 69 | 25
Gross Unrealized Losses | 0 | 0
Fair Value | 213,585 | 14,456
U.S. Treasury bills | Level 1: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 151,483 | 0
U.S. Treasury bills | Level 1: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
U.S. Treasury bills | Level 1: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 62,102 | 14,456
Marketable securities | Level 1: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 36,794 | 90,000
Gross Unrealized Gains | 31,385 | 108,270
Gross Unrealized Losses | 0 | 0
Fair Value | 68,179 | 198,270
Marketable securities | Level 1: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
Marketable securities | Level 1: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 68,179 | 198,270
Marketable securities | Level 1: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
Agency bonds | Level 1: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 25,911 | 996
Gross Unrealized Gains | 4 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 25,915 | 996
Agency bonds | Level 1: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
Agency bonds | Level 1: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
Agency bonds | Level 1: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 25,915 | 996
U.S. Government bonds | Level 1: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 6,485 | 75,994
Gross Unrealized Gains | 0 | 7
Gross Unrealized Losses | 0 | (5)
Fair Value | 6,485 | 75,996
U.S. Government bonds | Level 1: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
U.S. Government bonds | Level 1: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
U.S. Government bonds | Level 1: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 6,485 | 75,996
Term deposits | Level 2: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 749,618 | 136,480
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 749,618 | 136,480
Term deposits | Level 2: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 59,339 | 11,480
Term deposits | Level 2: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
Term deposits | Level 2: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 690,279 | 125,000
Corporate bonds | Level 2: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 125,936 | 122,018
Gross Unrealized Gains | 68 | 10
Gross Unrealized Losses | (7) | (63)
Fair Value | 125,997 | 121,965
Corporate bonds | Level 2: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 24,075
Corporate bonds | Level 2: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
Corporate bonds | Level 2: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 125,997 | 97,890
Commercial paper | Level 2: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 40,507 | 20,393
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 40,507 | 20,393
Commercial paper | Level 2: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 1,496
Commercial paper | Level 2: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 | 0
Commercial paper | Level 2: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 40,507 | $ 18,897
Certificates of deposit | Level 2: |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Amortized Cost | 1,500 |
Gross Unrealized Gains | 1 |
Gross Unrealized Losses | 0 |
Fair Value | 1,501 |
Certificates of deposit | Level 2: | Cash and Cash Equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 |
Certificates of deposit | Level 2: | Marketable Securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | 0 |
Certificates of deposit | Level 2: | Short-Term Investments |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Fair Value | $ 1,501 |

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