Quarterly report pursuant to Section 13 or 15(d)

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

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Debt - Components of Interest Expense, Related Fees, Losses on Debt Extinguishment and Cash Paid for Interest Expense for Debt (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Debt Instrument [Line Items]    
Interest Expense, Total $ 18,954 $ 13,489
Amortization of debt issuance costs 1,509 1,210
Interest Expense Debt [1] 16,625 11,647
Cash paid for interest expense 23,840 19,010
Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 820 632
SBA Debentures    
Debt Instrument [Line Items]    
Interest Expense, Total 1,269 690
Amortization of debt issuance costs 144 140
Interest Expense Debt [1] 1,125 550
Cash paid for interest expense 2,262 749
SBA Debentures | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0 0
2022 Notes    
Debt Instrument [Line Items]    
Interest Expense, Total [2]   1,061
Amortization of debt issuance costs [2]   50
Interest Expense Debt [1],[2]   1,011
Cash paid for interest expense [2]   2,293
2022 Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) [2]   0
July 2024 Notes    
Debt Instrument [Line Items]    
Interest Expense, Total 1,326 1,326
Amortization of debt issuance costs 74 74
Interest Expense Debt [1] 1,252 1,252
Cash paid for interest expense 2,504 2,504
July 2024 Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0 0
February 2025 Notes    
Debt Instrument [Line Items]    
Interest Expense, Total 564 564
Amortization of debt issuance costs 29 29
Interest Expense Debt [1] 535 535
Cash paid for interest expense 1,070 1,070
February 2025 Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0 0
June 2025 Notes    
Debt Instrument [Line Items]    
Interest Expense, Total 794 794
Amortization of debt issuance costs 40 40
Interest Expense Debt [1] 754 754
Cash paid for interest expense 0 0
June 2025 Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0 0
June 2025 3-Year Notes    
Debt Instrument [Line Items]    
Interest Expense, Total 789  
Amortization of debt issuance costs 39  
Interest Expense Debt [3] 750  
Cash paid for interest expense 0  
June 2025 3-Year Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0  
March 2026 A Notes    
Debt Instrument [Line Items]    
Interest Expense, Total 587 587
Amortization of debt issuance costs 24 24
Interest Expense Debt [1] 563 563
Cash paid for interest expense 1,125 1,125
March 2026 A Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0 0
March 2026 B Notes    
Debt Instrument [Line Items]    
Interest Expense, Total 595 595
Amortization of debt issuance costs 26 26
Interest Expense Debt [1] 569 569
Cash paid for interest expense 1,139 1,138
March 2026 B Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0 0
September 2026 Notes    
Debt Instrument [Line Items]    
Interest Expense, Total 2,378 2,378
Amortization of debt issuance costs 204 204
Interest Expense Debt [1] 2,174 2,174
Cash paid for interest expense 4,266 4,266
September 2026 Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0 0
January 2027 Notes    
Debt Instrument [Line Items]    
Interest Expense, Total 3,286 2,556
Amortization of debt issuance costs 207 161
Interest Expense Debt [1] 3,079 2,395
Cash paid for interest expense 5,906
January 2027 Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0 0
2031 Asset-Backed Notes    
Debt Instrument [Line Items]    
Interest Expense, Total 2,003  
Amortization of debt issuance costs 100  
Interest Expense Debt [1] 1,903  
Cash paid for interest expense 1,856  
2031 Asset-Backed Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0  
2033 Notes    
Debt Instrument [Line Items]    
Interest Expense, Total 652 652
Amortization of debt issuance costs 27 27
Interest Expense Debt [1] 625 625
Cash paid for interest expense 625 625
2033 Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 0 0
2022 Convertible Notes    
Debt Instrument [Line Items]    
Interest Expense, Total [2]   1,072
Amortization of debt issuance costs [2]   149
Interest Expense Debt [1],[2]   923
Cash paid for interest expense [2]   5,004
2022 Convertible Notes | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) [2]   0
MUFG Bank Facility    
Debt Instrument [Line Items]    
Interest Expense, Total 2,772 [4] 918 [5]
Amortization of debt issuance costs 442 [4] 237 [5]
Interest Expense Debt [1] 1,713 [4] 114 [5]
Cash paid for interest expense 1,837 [4] 0 [5]
MUFG Bank Facility | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) 617 [4] 567 [5]
SMBC Facility    
Debt Instrument [Line Items]    
Interest Expense, Total 1,939 296
Amortization of debt issuance costs 153 49
Unused facility and other fees (loan fees)   65
Interest Expense Debt [1] 1,583 182
Cash paid for interest expense 1,250 $ 236
SMBC Facility | Unused Facility Other Fees [Member]    
Debt Instrument [Line Items]    
Unused facility and other fees (loan fees) $ 203  
[1] Interest expense includes amortization of original issue discounts for the three months ended March 31, 2022 of $23 thousand, $112 thousand, $42 thousand, and $98 thousand, related to the 2022 Notes, 2022 Convertible Notes, September 2026 Notes, and January 2027 Notes, respectively.
[2] In February 2022, the Company has fully repaid the aggregate outstanding principal balances and retired 2022 Notes and 2022 Convertible Notes.
[3] Interest expense includes amortization of original issue discounts for the three months ended March 31, 2023 of $42 thousand, $126 thousand, and $47 thousand related to the September 2026 Notes, January 2027 Notes, and 2031 Asset-Backed Notes, respectively.
[4] The June 2022 amendment of the MUFG Bank Facility replaced the Union Bank Facility via an amendment which changed the lead lender.
[5] The June 2022 amendment of the MUFG Bank Facility replaced the Union Bank Facility via an amendment which changed the lead lender.