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Debt (Tables) | 12 Months Ended
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Dec. 31, 2023
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Instruments | The following table summarizes information about the net carrying amounts of long-term debt as of December 31, 2023:
(in thousands) |  |  | 2026 Notes |  | 2027 Notes |  | Total
Principal amount of notes outstanding |  |  | $ | 120,000 |  |  | $ | 265,000 |  |  | $ | 385,000 |
Unamortized debt issuance cost |  |  | (1,811) |  |  | (5,542) |  |  | (7,353) |
Total notes payable |  |  | $ | 118,189 |  |  | $ | 259,458 |  |  | $ | 377,647 |
The following table summarizes information about the net carrying amounts of long-term debt as of December 31, 2022:
(in thousands) | 2024 Notes |  | 2026 Notes |  | 2027 Notes |  | Total
Principal amount of notes outstanding | $ | 13,750 |  |  | $ | 120,000 |  |  | $ | 265,000 |  |  | $ | 398,750 |
Unamortized debt issuance cost | (257) |  |  | (2,511) |  |  | (6,790) |  |  | (9,558) |
Total notes payable | $ | 13,493 |  |  | $ | 117,489 |  |  | $ | 258,210 |  |  | $ | 389,192 |
Summary of Equity and Liability Components of the Notes | The following table summarizes interest expense recognized on the 2024 Notes and Senior Notes:
| Year Ended December 31,
(in thousands) | 2023 |  | 2022 |  | 2021
Contractual interest expense | $ | 7,627 |  |  | $ | 8,036 |  |  | $ | 9,420 |
Accretion of debt in interest expense | 2,205 |  |  | 1,997 |  |  | 8,726 |
Total interest expense | $ | 9,832 |  |  | $ | 10,033 |  |  | $ | 18,146 |
Schedule of Maturities of Long-term Debt | The following table summarizes the future principal payments for the Senior Notes as of December 31, 2023 (in thousands):
2024 | $ | — |
2025 | — |
2026 | 120,000 |
2027 | 265,000 |
2028 | — |
Thereafter | — |
Total | $ | 385,000 |

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69E Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-2 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-1A Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-3 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482949/835-30-55-8 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480848/942-470-50-3 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-8 Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-6 Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-7 + Details
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