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Debt - Changes to the notes (Details) - USD ($) | Sep. 30, 2021 | Mar. 09, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Line Of Credit Facility |  |  |
Less: unamortized debt discount and debt issuance costs | $ (6,965,000) |  |
Convertible senior notes due 2026, net | 592,335,000 |  | $ 0
Convertible Senior Notes Due 2026 | Senior Notes |  |  |
Line Of Credit Facility |  |  |
Convertible Senior Notes | 600,000,000 | $ 600,000,000 |
Less: unamortized debt discount and debt issuance costs | (7,665,000) |  |
Convertible senior notes due 2026, net | $ 592,335,000 |  |

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