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Cash and Cash Equivalents, Investments and Fair Value Measurements - Schedule of Available For Sale Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023
--- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |
Cash | $ 152,073 | $ 135,757 | $ 94,419
Adjusted Cost | 575,480 |  |
Fair Value | 578,714 |  |
Cash |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cash | 52,523 | 45,050 |
Short-term investments: |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Adjusted Cost | 208,991 | 194,787 |
Unrealized Gain | 85 | 0 |
Unrealized Loss | (73) | (530) |
Fair Value | 209,003 | 194,257 |
Long-term investments: |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Adjusted Cost | 266,939 | 248,754 |
Unrealized Gain | 3,230 | 1,063 |
Unrealized Loss | (8) | (270) |
Fair Value | 270,161 | 249,547 |
Level 1 | Money market funds |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cash | 99,550 | 90,707 |
Corporate debt securities | Level 2 | Short-term investments: |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Adjusted Cost | 118,386 | 69,548 |
Unrealized Gain | 53 | 0 |
Unrealized Loss | (47) | (170) |
Fair Value | 118,392 | 69,378 |
Corporate debt securities | Level 2 | Long-term investments: |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Adjusted Cost | 214,391 | 191,467 |
Unrealized Gain | 2,482 | 898 |
Unrealized Loss | (8) | (213) |
Fair Value | 216,865 | 192,152 |
U.S. treasury securities | Level 1 | Short-term investments: |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Adjusted Cost | 65,596 | 25,734 |
Unrealized Gain | 32 | 0 |
Unrealized Loss | (13) | (114) |
Fair Value | 65,615 | 25,620 |
U.S. treasury securities | Level 1 | Long-term investments: |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Adjusted Cost | 52,548 | 57,287 |
Unrealized Gain | 748 | 165 |
Unrealized Loss | 0 | (57) |
Fair Value | 53,296 | 57,395 |
Agency bonds | Level 2 | Short-term investments: |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Adjusted Cost | 25,009 | 99,505 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | (13) | (246) |
Fair Value | $ 24,996 | $ 99,259 |

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