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Investments and Fair Value Measurements - Schedule of Marketable Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | $ 572,462 | $ 434,628
Short-Term Marketable Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost | 574,111 | 436,928
Gross Unrealized Gains | 11 | 37
Gross Unrealized Losses | (1,660) | (3,222)
Fair Value | 572,462 | 433,743
Long-term Marketable Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost |  | 885
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 0
Fair Value |  | 885
Certificates of deposit |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 1,206 | 734
Certificates of deposit | Short-Term Marketable Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost | 1,206 | 747
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | (13)
Fair Value | 1,206 | 734
U.S. treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 263,086 | 185,402
U.S. treasury securities | Short-Term Marketable Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost | 263,979 | 186,776
Gross Unrealized Gains | 10 | 8
Gross Unrealized Losses | (903) | (1,382)
Fair Value | 263,086 | 185,402
U.S. agency securities | Short-Term Marketable Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost | 267,458 | 197,597
Gross Unrealized Gains | 0 | 29
Gross Unrealized Losses | (659) | (1,660)
Fair Value | 266,799 | 195,966
U.S. agency securities | Long-term Marketable Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost |  | 885
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 0
Fair Value |  | 885
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 31,403 | 25,386
Commercial paper | Short-Term Marketable Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost | 31,412 | 25,386
Gross Unrealized Gains | 1 | 0
Gross Unrealized Losses | (10) | 0
Fair Value | 31,403 | 25,386
Municipal bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value |  | 22,619
Municipal bonds | Short-Term Marketable Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost |  | 22,764
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | (145)
Fair Value |  | 22,619
Corporate bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 9,968 | 3,636
Corporate bonds | Short-Term Marketable Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost | 10,056 | 3,658
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (88) | (22)
Fair Value | $ 9,968 | $ 3,636

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