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Significant Accounting Policies - Convertible Senior Notes (Details) - Senior Notes - USD ($) $ in Thousands | 1 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2020 | Apr. 30, 2019 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
2026 Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Face value | $ 1,000,000 |  | $ 500,000 | $ 1,000,000 |  |
Interest rate, stated percentage | 0.00% |  |  |  |  |
Principal amount | $ 1,000,000 |  |  |  |  |
0.125 Percent Convertible Senior Notes Due 2025 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Face value |  |  | $ 699,979 | $ 699,982 | $ 700,000 | $ 700,000
Interest rate, stated percentage |  |  |  |  | 0.125% | 0.125%
Option to purchase additional notes |  | $ 100,000 |  |  |  |
Principal amount |  | $ 800,000 |  |  |  |

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