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Fair Value of Financial Instruments - Schedule of Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Fair value of financial instruments |  |  |
Long term equity investments | $ 17,463 | $ 18,814 | [1]
Fair Value, Recurring | Estimate of Fair Value Measurement |  |  |
Fair value of financial instruments |  |  |
Cash and cash equivalents | 1,941,722 | 1,687,829 |
Debt securities (government) | 466,936 | 470,263 |
Long term equity investments | 17,463 | 18,814 |
Total assets | 2,426,121 | 2,176,906 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring |  |  |
Fair value of financial instruments |  |  |
Cash and cash equivalents | 1,941,722 | 1,687,829 |
Debt securities (government) | 0 | 0 |
Long term equity investments | 17,463 | 18,814 |
Total assets | 1,959,185 | 1,706,643 |
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring |  |  |
Fair value of financial instruments |  |  |
Cash and cash equivalents | 0 | 0 |
Debt securities (government) | 466,936 | 470,263 |
Long term equity investments | 0 | 0 |
Total assets | 466,936 | 470,263 |
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring |  |  |
Fair value of financial instruments |  |  |
Cash and cash equivalents | 0 | 0 |
Debt securities (government) | 0 | 0 |
Long term equity investments | 0 | 0 |
Total assets | $ 0 | $ 0 |
[1] | The condensed consolidated balance sheet at December 31, 2024 has been derived from the audited consolidated financial statements at that date.

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