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Debt (Tables) | 9 Months Ended
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Sep. 30, 2023
Debt Disclosure [Abstract] |
Schedule of Balances and Availability of 2026 Notes and 2020 Revolving Credit Facility | The following table summarizes the balances and availability of our 2026 Notes and 2020 Revolving Credit Facility:
| Outstanding (1) |  | Unutilized Amount |  | Interest Rate |  | Maturity Date
| September 30, 2023 |  | December 31, 2022 |  | September 30, 2023 |  | December 31, 2022 | September 30, 2023 |  | December 31, 2022 |
| (in thousands) |  |  |  |  |  |  |  |
2026 Notes | $ | 366,374 |  |  | $ | 364,505 |  |  | N/A |  | N/A |  | 0.125% |  |  | 0.125% |  |  | Sept. 1, 2026
2020 Revolving Credit Facility | 1,037 |  |  | 1,037 |  |  | $ | 148,963 |  |  | $ | 148,963 |  |  | 1.25% | (2) |  | 1.25% | (2) |  | July 27, 2025
(1) Represents the net carrying amount of our 2026 Notes and outstanding letters of credit under the 2020 Revolving Credit Facility. (2) Represents the rate on the outstanding letters of credit under the 2020 Revolving Credit Facility. See further discussion on the interest rate applicable to borrowings under the 2020 Revolving Credit Facility below.
Schedule of Interest Expense | The following table sets forth the interest expense related to the 2026 Notes for the periods presented:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
| (in thousands)
Contractual interest expense | $ | 116 |  |  | $ | 116 |  |  | $ | 350 |  |  | $ | 350 |
Amortization of issuance costs | 624 |  |  | 620 |  |  | 1,869 |  |  | 1,854 |

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