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Investments - Summary of Investments in CLO Fund Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Summary of Investment Holdings [Line Items] |  |  |  |
Cost/Amortized Cost |  | $ 652,217 |  | $ 605,365
Fair Value |  | 576,478 |  | 549,985
CLO Fund Securities |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Cost/Amortized Cost |  | 34,649 |  | 51,561
Fair Value |  | $ 20,453 | [1] | 31,632
CLO Fund Securities | Subordinated Notes | Catamaran CLO 2013- 1 Ltd. |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Cost/Amortized Cost |  |  |  | 4,198
Fair Value |  |  |  | 1,779
CLO Fund Securities | Subordinated Notes | Catamaran CLO 2014-1 Ltd. |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of class held | [2] | 22.00% |  |
Cost/Amortized Cost |  | $ 4,216 |  | 9,679
Fair Value |  | $ 3,232 |  | 4,278
CLO Fund Securities | Subordinated Notes | Catamaran CLO 2014-2 Ltd. |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of class held | [2] | 25.00% |  |
Cost/Amortized Cost |  | $ 6,066 |  | 6,066
CLO Fund Securities | Subordinated Notes | Catamaran CLO 2015-1 Ltd. |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of class held | [2] | 10.00% |  |
Cost/Amortized Cost |  | $ 2,534 |  | 2,549
CLO Fund Securities | Subordinated Notes | Catamaran CLO 2018-1 Ltd. |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of class held | [2] | 25.00% |  |
Cost/Amortized Cost |  | $ 6,338 |  | 8,694
Fair Value |  | $ 4,753 |  | 6,314
CLO Fund Securities | Subordinated Notes | Dryden 30 Senior Loan Fund |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of class held | [2] | 7.00% |  |
Cost/Amortized Cost |  | $ 868 |  | 1,147
Fair Value |  | $ 868 |  | 1,258
CLO Fund Securities | Subordinated Notes | JMP CLO IV Junior Sub Note |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of class held | [2] | 57.00% |  |
Cost/Amortized Cost |  | $ 4,020 |  | 8,530
Fair Value |  | $ 4,020 |  | 8,105
CLO Fund Securities | Subordinated Notes | JMP CLO V Junior Sub Note |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of class held | [2] | 57.00% |  |
Cost/Amortized Cost |  | $ 10,607 |  | 10,698
Fair Value |  | $ 7,580 |  | $ 9,898
[1] | Reflects the fair market value of all investments as of December 31, 2022 as determined by the Company’s Board of Directors.
[2] | Represents percentage of class held as of December 31, 2022.

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