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Fair Value Measurements (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024
--- | --- | --- | ---
Fair Value Measurements [Abstract] |  |  |  |  |
Available-for-sale securities | $ 2,047,955 |  | $ 2,056,008 |  |
1.75% Notes [Member] |  |  |  |  |
Fair Value Measurements [Abstract] |  |  |  |  |
Interest rate on convertible senior notes | 1.75% |  | 1.75% |  | 1.75%
0% Notes [Member] |  |  |  |  |
Fair Value Measurements [Abstract] |  |  |  |  |
Interest rate on convertible senior notes | 0.00% |  | 0.00% |  | 0.00%
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | 1.75% Notes [Member] |  |  |  |  |
Fair Value Measurements [Abstract] |  |  |  |  |
Convertible notes | $ 604,200 |  | $ 569,300 |  |
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | 0% Notes [Member] |  |  |  |  |
Fair Value Measurements [Abstract] |  |  |  |  |
Convertible notes | 640,700 |  | 612,800 |  |
Recurring Basis [Member] | Corporate Debt Securities [Member] |  |  |  |  |
Fair Value Measurements [Abstract] |  |  |  |  |
Available-for-sale securities | 1,066,386 | [1] | 1,032,066 | [2] |
Recurring Basis [Member] | Corporate Debt Securities [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |  |  |  |
Fair Value Measurements [Abstract] |  |  |  |  |
Available-for-sale securities | 1,066,386 | [1] | 1,032,066 | [2] |
Recurring Basis [Member] | US Treasury Securities [Member] |  |  |  |  |
Fair Value Measurements [Abstract] |  |  |  |  |
Available-for-sale securities | 777,981 | [3] | 806,724 | [2] |
Recurring Basis [Member] | US Treasury Securities [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |  |  |  |
Fair Value Measurements [Abstract] |  |  |  |  |
Available-for-sale securities | 0 | [3] | $ 0 | [2] |
Cash and Cash Equivalents [Member] | Recurring Basis [Member] | Corporate Debt Securities [Member] |  |  |  |  |
Fair Value Measurements [Abstract] |  |  |  |  |
Available-for-sale securities | 29,900 |  |  |  |
Cash and Cash Equivalents [Member] | Recurring Basis [Member] | US Treasury Securities [Member] |  |  |  |  |
Fair Value Measurements [Abstract] |  |  |  |  |
Available-for-sale securities | $ 24,400 |  |  |  |
[1] | $29.9 million was included in cash and cash equivalents, with the difference included in short-term investments.
[2] | Included in short-term investments.
[3] | $24.4 million was included in cash and cash equivalents, with the difference included in short-term investments.

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