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Convertible Senior Notes (Tables) | 6 Months Ended
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Jun. 30, 2023
Debt Instrument [Line Items] |
Carrying Value of Convertible Senior Notes | The net carrying value of the liability component of the 2019 Notes is as follows:
|  | June 30, 2023 |  |  | December 31, 2022 |
|  | (Amounts in thousands) |
0.375% Convertible Senior Notes due 2024: |  |  |  |  |  |
Principal amount |  | $ | 287,461 |  |  | $ | 287,470 |
Unamortized debt issuance costs |  |  | (1,940 | ) |  |  | (2,855 | )
Net carrying amount |  | $ | 285,521 |  |  | $ | 284,615 |
2019 Notes |
Debt Instrument [Line Items] |
Schedule of convertible note interest expense | The following table sets forth total interest expense recognized related to the 2019 Notes:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
|  | (Amounts in thousands) |
Contractual interest expense |  | $ | 269 |  |  | $ | 269 |  |  | $ | 539 |  |  | $ | 539 |
Amortization of debt issuance costs |  |  | 457 |  |  |  | 453 |  |  |  | 914 |  |  |  | 905 |
Total |  | $ | 726 |  |  | $ | 722 |  |  | $ | 1,453 |  |  | $ | 1,444 |
Effective interest rate of the liability component |  |  | 1 | % |  |  | 1 | % |  |  | 1 | % |  |  | 1 | %

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