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Commitments and Contingencies - Schedule of Contractual Obligations (Parenthetical) (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Commitments And Contingencies [Line Items] |  |
Principal | $ 1,542,000 | $ 1,250,425
SMBC Facility |  |
Commitments And Contingencies [Line Items] |  |
Principal | 25,000 | 29,900
MUFG Bank Facility |  |
Commitments And Contingencies [Line Items] |  |
Principal | 102,000 | 0
SBA Debentures |  |
Commitments And Contingencies [Line Items] |  |
Principal | 175,000 | 150,500
2022 Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 0 | 150,000
July 2024 Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 105,000 | 105,000
February 2025 Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 50,000 | 50,000
June 2025 Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 70,000 | 70,000
June 2025 3-Year Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 50,000 | 0
March 2026 A Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 50,000 | 50,000
March 2026 B Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 50,000 | 50,000
2031 Asset-Backed Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 150,000 | 0
2033 Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 40,000 | 40,000
September 2026 Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 325,000 | 325,000
January 2027 Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | 350,000 | 0
2022 Convertible Notes |  |
Commitments And Contingencies [Line Items] |  |
Principal | $ 0 | $ 230,000

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