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Convertible Senior Notes (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2024
Debt Instrument [Line Items] |
Carrying Value of Convertible Senior Notes | The carrying value of the Company's convertible senior notes is as follows:
|  | March 31, 2024 |  |  | December 31, 2023 |
|  | (Amounts in thousands, except percentage data) |
1.00% Convertible Senior Notes due 2028: |  |  |  |  |  |
Principal amount |  | $ | 600,000 |  |  | $ | 600,000 |
Unamortized debt discount |  | $ | (78,132 | ) |  | $ | (81,457 | )
Unamortized debt issuance costs |  |  | (7,950 | ) |  |  | (8,400 | )
Carrying amount - Convertible Senior Notes due 2028, net |  | $ | 513,918 |  |  | $ | 510,143 |
0.375% Convertible Senior Notes due 2024: |  |  |  |  |  |
Principal amount |  | $ | 69,616 |  |  | $ | 69,700 |
Unamortized debt issuance costs |  |  | (136 | ) |  |  | (248 | )
Carrying amount - Convertible Senior Notes due 2024, net |  | $ | 69,480 |  |  | $ | 69,452 |
2023 Notes |
Debt Instrument [Line Items] |
Schedule of convertiable note interest expense | The following table sets forth total interest expense recognized related to the 2023 Notes for the three months ended March 31, 2024 for which there were no comparable amounts for the same period of 2023 (amounts in thousands, except percentage data):
|  | Three Months Ended March 31, |
|  | 2024 |
Contractual interest expense – 2023 Notes |  | $ | 1,500 |
Amortization of debt discount – 2023 Notes |  |  | 3,326 |
Amortization of debt issuance costs – 2023 Notes |  |  | 371 |
Total |  | $ | 5,197 |
Effective interest rate of the liability component |  |  | 4.39 | %
2019 Notes |
Debt Instrument [Line Items] |
Schedule of convertiable note interest expense | The following table sets forth total interest expense recognized related to the 2019 Notes:
|  | Three Months Ended March 31, |
|  | 2024 |  |  | 2023 |
|  | (Amounts in thousands, except percentage data) |
Contractual interest expense – 2019 Notes |  | $ | 65 |  |  | $ | 270 |
Amortization of debt issuance costs – 2019 Notes |  |  | 112 |  |  |  | 457 |
Total |  | $ | 177 |  |  | $ | 727 |
Effective interest rate of the liability component |  |  | 1.00 | % |  |  | 1.00 | %

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