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Investments - Summary of Investments in CLO Fund Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 502,779 | $ 540,282
Fair Value |  | 428,978 | 467,865
CLO Fund Securities | Collateral Loan Obligations |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | 7,881 | 9,103
Fair Value |  | 6,786 | 8,968
CLO Fund Securities | Collateral Loan Obligations | Catamaran CLO 2014-1 Ltd. |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | 120 | 1,024
Fair Value |  | $ 120 | $ 904
Percentage Ownership | [1] | 22.20% | 22.20%
CLO Fund Securities | Collateral Loan Obligations | Catamaran CLO 2018-1 Ltd. |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 3,339 | $ 3,923
Fair Value |  | $ 2,832 | $ 3,923
Percentage Ownership | [1] | 24.80% | 24.80%
CLO Fund Securities | Collateral Loan Obligations | Dryden 30 Senior Loan Fund |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 170 | $ 424
Fair Value |  | $ 170 | $ 409
Percentage Ownership | [1] | 6.80% | 6.80%
CLO Fund Securities | Collateral Loan Obligations | JMP Credit Advisors CLO IV Ltd. |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 740 | $ 683
Fair Value |  | $ 698 | $ 683
Percentage Ownership | [1] | 57.20% | 57.20%
CLO Fund Securities | Collateral Loan Obligations | JMP Credit Advisors CLO V Ltd. |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 3,512 | $ 3,049
Fair Value |  | $ 2,966 | $ 3,049
Percentage Ownership | [1] | 57.20% | 57.20%
Equity Securities |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 29,493 | $ 31,280
Fair Value |  | $ 22,879 | $ 20,533
[1] | Represents percentage of class held at September 30, 2024 and December 31, 2023, respectively.

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