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Marketable Securities - Marketable Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost |  |
Total available-for-sale securities | $ 370,323 | $ 284,172
Unrealized Gains (Losses) |  |
Unrealized Gains | 980 | 265
Unrealized Losses | (8) | (70)
Fair Value |  |
Marketable securities | 371,295 | 284,367
One Year or Less |  |
Amortized Cost |  |
Total securities with a maturity of one year or less | 309,228 | 260,966
Unrealized Gains (Losses) |  |
Unrealized Gains | 700 | 127
Unrealized Losses | (8) | (70)
Fair Value |  |
Total securities with a maturity of one year or less | 309,920 | 261,023
One to Two Years |  |
Amortized Cost |  |
Total securities with a maturity of more than one year | 61,095 | 23,206
Unrealized Gains (Losses) |  |
Unrealized Gains | 280 | 138
Unrealized Losses | 0 | 0
Fair Value |  |
Total securities with a maturity of more than one year | 61,375 | 23,344
U.S. government agency securities and treasuries | One Year or Less |  |
Amortized Cost |  |
Total securities with a maturity of one year or less | 248,221 | 235,500
Unrealized Gains (Losses) |  |
Unrealized Gains | 490 | 127
Unrealized Losses | 0 | (41)
Fair Value |  |
Total securities with a maturity of one year or less | 248,711 | 235,586
U.S. government agency securities and treasuries | One to Two Years |  |
Amortized Cost |  |
Total securities with a maturity of more than one year | 50,497 | 15,537
Unrealized Gains (Losses) |  |
Unrealized Gains | 157 | 45
Unrealized Losses | 0 | 0
Fair Value |  |
Total securities with a maturity of more than one year | 50,654 | 15,582
Corporate debt securities | One Year or Less |  |
Amortized Cost |  |
Total securities with a maturity of one year or less | 61,007 | 25,466
Unrealized Gains (Losses) |  |
Unrealized Gains | 210 | 0
Unrealized Losses | (8) | (29)
Fair Value |  |
Total securities with a maturity of one year or less | 61,209 | 25,437
Corporate debt securities | One to Two Years |  |
Amortized Cost |  |
Total securities with a maturity of more than one year | 10,598 | 7,669
Unrealized Gains (Losses) |  |
Unrealized Gains | 123 | 93
Unrealized Losses | 0 | 0
Fair Value |  |
Total securities with a maturity of more than one year | $ 10,721 | $ 7,762

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