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Debt (Tables) | 6 Months Ended
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Jun. 30, 2022
Debt Disclosure [Abstract] |
Components of Debt Balance | The following table presents the carrying value of the Company's debt balance (in thousands):
| June 30, 2022 |  | December 31, 2021
Face value of outstanding convertible notes | $ | 800,000 |  |  | $ | 800,000 |
Debt issuance costs, unamortized | (16,023) |  |  | (11,539) |
Discount on debt | — |  |  | (221,873) |
Debt, long-term | $ | 783,977 |  |  | $ | 566,588 |
Schedule of Future Principal Repayments of Debt | As of June 30, 2022, future principal repayments of the notes for each of the years through maturity were as follows (in thousands):
Year Ending December 31: |
2022 | $ | — |
2023 | — |
2024 | — |
2025 | 225,000 |
2026 | — |
2027 and thereafter | 575,000 |
| $ | 800,000 |
Summary of Interest Expense | Interest expense related to debt and finance leases for the three and six months ended June 30, 2022 and 2021 is as follows (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Contractual interest expense | $ | 2,062 |  |  | $ | 2,052 |  |  | $ | 4,125 |  |  | $ | 4,021 |
Amortization of debt issuance costs | 821 |  |  | 457 |  |  | 1,643 |  |  | 807 |
Accretion of debt discount | — |  |  | 7,482 |  |  | — |  |  | 12,389 |
Total convertible debt interest expense | 2,883 |  |  | 9,991 |  |  | 5,768 |  |  | 17,217 |
Finance lease interest expense | 474 |  |  | 328 |  |  | 880 |  |  | 661 |
Interest expense | $ | 3,357 |  |  | $ | 10,319 |  |  | $ | 6,648 |  |  | $ | 17,878 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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