Quarterly report pursuant to Section 13 or 15(d)

Debt - Components of Interest Expense, Related Fees and Cash Paid for Interest Expense for Debt (Details)

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Debt - Components of Interest Expense, Related Fees and Cash Paid for Interest Expense for Debt (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Debt Instrument [Line Items]    
Interest expense $ 17,624 $ 16,625
Amortization of debt issuance cost (loan fees) 1,542 1,509
Unused facility and other fees (loan fees) 855 820
Total interest expense and fees 20,021 18,954
Cash paid for interest expense 24,084 23,840
SBA Debentures    
Debt Instrument [Line Items]    
Interest expense 1,137 1,125
Amortization of debt issuance cost (loan fees) 146 144
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 1,283 1,269
Cash paid for interest expense 2,275 2,262
July 2024 Notes    
Debt Instrument [Line Items]    
Interest expense 1,252 1,252
Amortization of debt issuance cost (loan fees) 74 74
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 1,326 1,326
Cash paid for interest expense 2,504 2,504
February 2025 Notes    
Debt Instrument [Line Items]    
Interest expense 535 535
Amortization of debt issuance cost (loan fees) 29 29
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 564 564
Cash paid for interest expense 1,070 1,070
June 2025 Notes    
Debt Instrument [Line Items]    
Interest expense 754 754
Amortization of debt issuance cost (loan fees) 40 40
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 794 794
Cash paid for interest expense 0 0
June 2025 3-Year Notes    
Debt Instrument [Line Items]    
Interest expense 750 750
Amortization of debt issuance cost (loan fees) 39 39
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 789 789
Cash paid for interest expense 0 0
March 2026 A Notes    
Debt Instrument [Line Items]    
Interest expense 563 563
Amortization of debt issuance cost (loan fees) 24 24
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 587 587
Cash paid for interest expense 1,125 1,125
March 2026 B Notes    
Debt Instrument [Line Items]    
Interest expense 569 569
Amortization of debt issuance cost (loan fees) 26 26
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 595 595
Cash paid for interest expense 1,138 1,139
September 2026 Notes    
Debt Instrument [Line Items]    
Interest expense 2,175 2,174
Amortization of debt issuance cost (loan fees) 203 204
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 2,378 2,378
Cash paid for interest expense 4,265 4,266
Amortization of original issue discounts 42 42
January 2027 Notes    
Debt Instrument [Line Items]    
Interest expense 3,079 3,079
Amortization of debt issuance cost (loan fees) 207 207
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 3,286 3,286
Cash paid for interest expense 5,906 5,906
Amortization of original issue discounts 126 126
2031 Asset-Backed Notes    
Debt Instrument [Line Items]    
Interest expense 1,903 1,903
Amortization of debt issuance cost (loan fees) 100 100
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 2,003 2,003
Cash paid for interest expense 1,856 1,856
Amortization of original issue discounts 47 47
2033 Notes    
Debt Instrument [Line Items]    
Interest expense 625 625
Amortization of debt issuance cost (loan fees) 27 27
Unused facility and other fees (loan fees) 0 0
Total interest expense and fees 652 652
Cash paid for interest expense 625 625
MUFG Bank Facility    
Debt Instrument [Line Items]    
Interest expense 1,933 1,713
Amortization of debt issuance cost (loan fees) 447 442
Unused facility and other fees (loan fees) 609 617
Total interest expense and fees 2,989 2,772
Cash paid for interest expense 1,566 1,837
SMBC Facility    
Debt Instrument [Line Items]    
Interest expense 2,349 1,583
Amortization of debt issuance cost (loan fees) 180 153
Unused facility and other fees (loan fees) 246 203
Total interest expense and fees 2,775 1,939
Cash paid for interest expense $ 1,754 $ 1,250