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Financial Instruments (Details) $ in Thousands | Jun. 30, 2025 USD ($) position | Dec. 31, 2024 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
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Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract] |  |  |  |
Amortized Cost | $ 1,016,021 | $ 968,606 |  |
Gross Unrealized Loss | (25) | (330) |  |
Estimated Fair Value | 1,015,996 | 968,276 |  |
Cash, cash equivalents and restricted cash | 1,000,021 | 945,587 | $ 796,798 | $ 642,095
Short-term investments | $ 15,975 | 22,689 |  |
Number of investments, unrealized loss position | position | 3 |  |  |
Credit loss reserve | $ 0 |  |  |
Fair value | 11,975 |  |  |
Unrealized loss | (25) |  |  |
Cash, cash equivalents, and restricted cash |  |  |  |
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract] |  |  |  |
Amortized Cost | 1,000,021 | 945,587 |  |
Estimated Fair Value | 1,000,021 | 945,587 |  |
Municipal securities |  |  |  |
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract] |  |  |  |
Amortized Cost | 16,000 | 23,019 |  |
Gross Unrealized Loss | (25) | (330) |  |
Estimated Fair Value | 15,975 | $ 22,689 |  |
Fair value | 11,975 |  |  |
Unrealized loss | $ (25) |  |  |

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