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Borrowings - Components of Interest Expense and Related Fees (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Series A Notes |  |  |
Line Of Credit Facility [Line Items] |  |  |
Stated interest expense | $ 1,861 |  |
Amortization of deferred financing costs | 81 |  |
Total interest and amortization of deferred financing costs | $ 1,942 |  |
Weighted average effective interest rate | 7.90% |  |
Weighted average outstanding balance | $ 24,529 |  |
2025 Notes |  |  |
Line Of Credit Facility [Line Items] |  |  |
Stated interest expense | 11,468 | $ 12,775 | $ 10,527
Amortization of deferred financing costs | 1,948 | 1,990 | 1,584
Total interest and amortization of deferred financing costs | $ 13,416 | $ 14,765 | $ 12,111
Weighted average effective interest rate | 8.20% | 8.10% | 8.00%
Weighted average outstanding balance | $ 163,730 | $ 182,500 | $ 150,575
6.00% Convertible Notes due 2025 |  |  |
Line Of Credit Facility [Line Items] |  |  |
Stated interest expense | 3,000 | 3,000 | 3,000
Amortization of deferred financing costs | $ 645 | $ 639 | $ 639
Weighted average effective interest rate | 7.30% | 7.30% | 7.30%
Weighted average outstanding balance | $ 50,000 | $ 50,000 | $ 50,000
Total interest and amortization of deferred financing costs and original issue discount | 3,645 | 3,639 | 3,639
August 2026 Notes |  |  |
Line Of Credit Facility [Line Items] |  |  |
Stated interest expense | 5,469 | 5,469 | 5,453
Amortization of deferred financing costs | 582 | 577 | 577
Total interest and amortization of deferred financing costs | $ 6,051 | $ 6,046 | $ 6,030
Weighted average effective interest rate | 4.80% | 4.80% | 4.80%
Weighted average outstanding balance | $ 125,000 | $ 125,000 | $ 125,000
December 2026 Notes |  |  |
Line Of Credit Facility [Line Items] |  |  |
Stated interest expense | 3,188 | 3,188 | 3,188
Amortization of deferred financing costs | 379 | 373 | 372
Total interest and amortization of deferred financing costs | $ 3,567 | $ 3,561 | $ 3,560
Weighted average effective interest rate | 4.80% | 4.70% | 4.70%
Weighted average outstanding balance | $ 75,000 | $ 75,000 | $ 75,000
March 2029 Notes |  |  |
Line Of Credit Facility [Line Items] |  |  |
Stated interest expense | 6,868 |  |
Amortization of deferred financing costs | 511 |  |
Total interest and amortization of deferred financing costs | $ 7,379 |  |
Weighted average effective interest rate | 8.40% |  |
Weighted average outstanding balance | $ 87,350 |  |
September 2029 Notes |  |  |
Line Of Credit Facility [Line Items] |  |  |
Stated interest expense | 4,075 |  |
Amortization of deferred financing costs | 320 |  |
Total interest and amortization of deferred financing costs | $ 4,395 |  |
Weighted average effective interest rate | 8.50% |  |
Weighted average outstanding balance | $ 51,844 |  |
KeyBank Credit Facility |  |  |
Line Of Credit Facility [Line Items] |  |  |
Stated interest expense | 20,492 | 15,468 | 8,033
Amortization of deferred financing costs | 1,061 | 817 | 766
Total interest and amortization of deferred financing costs | $ 21,553 | $ 16,285 | $ 8,799
Weighted average effective interest rate | 9.10% | 9.00% | 5.90%
Weighted average outstanding balance | $ 235,705 | $ 180,399 | $ 149,911

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