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 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Debt Instrument [Line Items]        
Interest expense $ 20,370 $ 16,428 $ 57,156 $ 50,237
Amortization of debt issuance cost (loan fees) 1,490 1,539 4,565 4,585
Unused facility and other fees (loan fees) 503 985 2,171 2,732
Total interest expense and fees 22,363 18,952 63,892 57,554
Cash paid for interest expense 28,685 23,747 64,221 57,410
SBA Debentures        
Debt Instrument [Line Items]        
Interest expense 1,149 1,150 3,424 3,412
Amortization of debt issuance cost (loan fees) 147 146 439 436
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 1,296 1,296 3,863 3,848
Cash paid for interest expense 2,300 2,300 4,575 4,562
July 2024 Notes        
Debt Instrument [Line Items]        
Interest expense 202 1,252 2,706 3,756
Amortization of debt issuance cost (loan fees) 24 74 172 222
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 226 1,326 2,878 3,978
Cash paid for interest expense 2,504 2,505 5,008 5,009
February 2025 Notes        
Debt Instrument [Line Items]        
Interest expense 535 535 1,605 1,605
Amortization of debt issuance cost (loan fees) 29 29 86 86
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 564 564 1,691 1,691
Cash paid for interest expense 1,070 1,070 2,140 2,140
June 2025 Notes        
Debt Instrument [Line Items]        
Interest expense 755 754 2,263 2,263
Amortization of debt issuance cost (loan fees) 40 40 121 121
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 795 794 2,384 2,384
Cash paid for interest expense 0 0 1,508 1,509
June 2025 3-Year Notes        
Debt Instrument [Line Items]        
Interest expense 750 750 2,250 2,250
Amortization of debt issuance cost (loan fees) 38 39 116 117
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 788 789 2,366 2,367
Cash paid for interest expense 0 0 1,500 1,500
March 2026 A Notes        
Debt Instrument [Line Items]        
Interest expense 563 563 1,688 1,688
Amortization of debt issuance cost (loan fees) 24 24 71 71
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 587 587 1,759 1,759
Cash paid for interest expense 1,125 1,125 2,250 2,250
March 2026 B Notes        
Debt Instrument [Line Items]        
Interest expense 568 569 1,706 1,706
Amortization of debt issuance cost (loan fees) 25 26 77 78
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 593 595 1,783 1,784
Cash paid for interest expense 1,138 1,138 2,276 2,275
September 2026 Notes        
Debt Instrument [Line Items]        
Interest expense 2,174 2,174 6,523 6,523
Amortization of debt issuance cost (loan fees) 205 203 612 611
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 2,379 2,377 7,135 7,134
Cash paid for interest expense 4,266 4,266 8,531 8,532
Amortization of original issue discounts 42 42 125 125
January 2027 Notes        
Debt Instrument [Line Items]        
Interest expense 3,080 3,079 9,236 9,236
Amortization of debt issuance cost (loan fees) 208 207 622 621
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 3,288 3,286 9,858 9,857
Cash paid for interest expense 5,906 5,906 11,812 11,812
Amortization of original issue discounts 126 126 377 377
2031 Asset-Backed Notes        
Debt Instrument [Line Items]        
Interest expense 1,903 1,902 5,710 5,709
Amortization of debt issuance cost (loan fees) 100 101 300 301
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 2,003 2,003 6,010 6,010
Cash paid for interest expense 1,856 1,857 5,568 5,570
Amortization of original issue discounts 47 47 141 141
2033 Notes        
Debt Instrument [Line Items]        
Interest expense 625 625 1,875 1,875
Amortization of debt issuance cost (loan fees) 27 27 81 81
Unused facility and other fees (loan fees) 0 0 0 0
Total interest expense and fees 652 652 1,956 1,956
Cash paid for interest expense 625 625 1,875 1,875
MUFG Bank Facility        
Debt Instrument [Line Items]        
Interest expense 4,105 1,247 8,181 4,323
Amortization of debt issuance cost (loan fees) 443 443 1,328 1,327
Unused facility and other fees (loan fees) 329 709 1,572 2,017
Total interest expense and fees 4,877 2,399 11,081 7,667
Cash paid for interest expense 3,875 1,240 7,596 4,673
SMBC Facility        
Debt Instrument [Line Items]        
Interest expense 3,961 1,828 9,989 5,891
Amortization of debt issuance cost (loan fees) 180 180 540 513
Unused facility and other fees (loan fees) 174 276 599 715
Total interest expense and fees 4,315 2,284 11,128 7,119
Cash paid for interest expense $ 4,020 $ 1,715 $ 9,582 $ 5,703