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Convertible Senior Notes (Tables) | 9 Months Ended
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Sep. 30, 2023
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Instruments | The total net proceeds from the notes are as follows (in thousands):
| 2026 Notes |  | 2025 Notes |  |
Principal amount | $ | 1,000,000 |  |  | $ | 800,000 |  |  |
Less initial purchasers’ discount | (15,000) |  |  | (18,998) |  |  |
Less other issuance costs | (904) |  |  | (822) |  |  |
Net proceeds | $ | 984,096 |  |  | $ | 780,180 |  |  |
Schedule of Debt | The net carrying amount of the notes is as follows (in thousands):
| September 30, 2023 |  |  |  | December 31, 2022
| 2026 Notes |  | 2025 Notes |  |  |  | 2026 Notes |  | 2025 Notes |  |
Principal | $ | 244,479 |  |  | $ | 358,914 |  |  |  |  | $ | 500,000 |  |  | $ | 699,979 |  |  |
Unamortized issuance costs | (1,883) |  |  | (2,219) |  |  |  |  | (4,837) |  |  | (6,549) |  |  |
Net carrying amount | $ | 242,596 |  |  | $ | 356,695 |  |  |  |  | $ | 495,163 |  |  | $ | 693,430 |  |  |
Schedule Of Interest Expense Recognized | The following table sets forth the total interest expense recognized related to the notes (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
2026 notes: |  |  |  |  |  |  |
Contractual interest expense | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Amortization of issuance costs | 238 |  |  | 556 |  |  | 873 |  |  | 1,863 |
Total 2026 notes interest expense | $ | 238 |  |  | $ | 556 |  |  | $ | 873 |  |  | $ | 1,863 |
2025 notes: |  |  |  |  |  |  |
Contractual interest expense | $ | 112 |  |  | $ | 220 |  |  | $ | 510 |  |  | $ | 654 |
Amortization of issuance costs | 384 |  |  | 749 |  |  | 1,737 |  |  | 2,221 |
Total 2025 notes interest expense | $ | 496 |  |  | $ | 969 |  |  | $ | 2,247 |  |  | $ | 2,875 |

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