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Investments - Company Portfolio by Security and Investment (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 476,432 | $ 540,282
Fair Value |  | $ 405,021 | $ 467,865
Fair Value Percentage of Total Portfolio |  | 100.00% | 100.00%
Joint Venture |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 66,747 | $ 71,415
Fair Value |  | $ 54,153 | $ 59,287
Fair Value Percentage of Total Portfolio |  | 13.40% | 12.70%
Services: Business |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 55,141 | $ 58,997
Fair Value |  | $ 51,776 | $ 57,168
Fair Value Percentage of Total Portfolio |  | 12.80% | 12.20%
High Tech Industries |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 55,932 | $ 84,676
Fair Value |  | $ 50,138 | $ 73,430
Fair Value Percentage of Total Portfolio |  | 12.40% | 15.70%
Banking, Finance, Insurance & Real Estate |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 44,191 | $ 51,486
Fair Value |  | $ 42,854 | $ 53,918
Fair Value Percentage of Total Portfolio |  | 10.60% | 11.50%
Healthcare & Pharmaceuticals |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 43,882 | $ 59,189
Fair Value |  | $ 41,872 | $ 57,224
Fair Value Percentage of Total Portfolio |  | 10.30% | 12.20%
Consumer goods: Durable |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 28,493 | $ 16,431
Fair Value |  | $ 27,028 | $ 13,898
Fair Value Percentage of Total Portfolio |  | 6.70% | 3.00%
Finance |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 14,815 | $ 18,884
Fair Value |  | $ 14,725 | $ 18,972
Fair Value Percentage of Total Portfolio |  | 3.60% | 4.10%
Machinery (Non-Agrclt/Constr/Electr) |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 11,705 | $ 9,836
Fair Value |  | $ 13,608 | $ 10,097
Fair Value Percentage of Total Portfolio |  | 3.40% | 2.20%
Media: Broadcasting & Subscription |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 19,095 | $ 16,665
Fair Value |  | $ 12,972 | $ 14,618
Fair Value Percentage of Total Portfolio |  | 3.20% | 3.10%
Beverage, Food and Tobacco |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 12,563 | $ 12,220
Fair Value |  | $ 11,612 | $ 11,444
Fair Value Percentage of Total Portfolio |  | 2.90% | 2.40%
Aerospace and Defense |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 11,403 | $ 11,130
Fair Value |  | $ 11,390 | $ 11,256
Fair Value Percentage of Total Portfolio |  | 2.80% | 2.40%
Chemicals, Plastics and Rubber |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 10,135 | $ 9,738
Fair Value |  | $ 9,628 | $ 9,836
Fair Value Percentage of Total Portfolio |  | 2.40% | 2.10%
Construction & Building |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 7,648 | $ 7,737
Fair Value |  | $ 7,596 | $ 7,441
Fair Value Percentage of Total Portfolio |  | 1.90% | 1.60%
Transportation: Consumer |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 7,410 | $ 7,465
Fair Value |  | $ 7,470 | $ 7,409
Fair Value Percentage of Total Portfolio |  | 1.80% | 1.60%
Retail |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 10,246 | $ 9,334
Fair Value |  | $ 6,853 | $ 8,732
Fair Value Percentage of Total Portfolio |  | 1.70% | 1.90%
Healthcare, Education and Childcare |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 6,114 | $ 6,175
Fair Value |  | $ 6,115 | $ 6,163
Fair Value Percentage of Total Portfolio |  | 1.50% | 1.30%
CLO Fund Securities |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 5,318 | $ 9,103
Fair Value |  | $ 5,193 | $ 8,968
Fair Value Percentage of Total Portfolio |  | 1.30% | 1.90%
Metals & Mining |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 9,950 | $ 9,000
Fair Value |  | $ 5,103 | $ 7,742
Fair Value Percentage of Total Portfolio |  | 1.30% | 1.70%
Transportation: Cargo |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 4,223 | $ 11,606
Fair Value |  | $ 3,782 | $ 10,303
Fair Value Percentage of Total Portfolio |  | 0.90% | 2.20%
Diversified Financial Services |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 3,058 |
Fair Value |  | $ 3,074 |
Fair Value Percentage of Total Portfolio |  | 0.80% | 0.00%
Containers, Packaging and Glass |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 2,728 | $ 2,734
Fair Value |  | $ 2,702 | $ 2,665
Fair Value Percentage of Total Portfolio |  | 0.70% | 0.60%
Energy: Electricity |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 2,696 | $ 671
Fair Value |  | $ 2,702 | $ 671
Fair Value Percentage of Total Portfolio |  | 0.70% | 0.10%
Interactive Media & Services |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 2,539 | $ 2,663
Fair Value |  | $ 2,559 | $ 2,662
Fair Value Percentage of Total Portfolio |  | 0.60% | 0.60%
Services: Consumer |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 2,699 |
Fair Value |  | $ 2,406 |
Fair Value Percentage of Total Portfolio |  | 0.60% | 0.00%
IT Consulting & Other Services |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 2,157 | $ 2,213
Fair Value |  | $ 2,243 | $ 2,259
Fair Value Percentage of Total Portfolio |  | 0.50% | 0.50%
Hotel, Gaming & Leisure |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 7,006 | $ 8,358
Fair Value |  | $ 2,205 | $ 3,948
Fair Value Percentage of Total Portfolio |  | 0.50% | 0.80%
Capital Equipment |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 8,016 | $ 10,684
Fair Value |  | $ 1,291 | $ 1,203
Fair Value Percentage of Total Portfolio |  | 0.30% | 0.30%
Application Software |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 1,165 |
Fair Value |  | $ 1,166 |
Fair Value Percentage of Total Portfolio |  | 0.20% | 0.00%
Telecommunications |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 1,541 | $ 5,268
Fair Value |  | $ 805 | $ 4,389
Fair Value Percentage of Total Portfolio |  | 0.20% | 0.90%
Alternative Carriers |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  |  | $ 971
Fair Value |  |  | $ 937
Fair Value Percentage of Total Portfolio |  | 0.00% | 0.20%
Asset Management Company |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost | [1] | $ 17,791 | $ 17,791
Fair Value Percentage of Total Portfolio | [1] | 0.00% | 0.00%
Energy: Oil & Gas |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 25 | $ 6,721
Fair Value |  |  | $ 100
Fair Value Percentage of Total Portfolio |  | 0.00% | 0.00%
Media: Diversified & Production |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  |  | $ 1,121
Fair Value |  |  | $ 1,125
Fair Value Percentage of Total Portfolio |  | 0.00% | 0.20%
First Lien Debt |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 311,673 | $ 351,858
Fair Value |  | $ 289,957 | $ 336,599
Fair Value Percentage of Total Portfolio |  | 71.60% | 71.90%
Second Lien Debt |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 34,892 | $ 50,814
Fair Value |  | $ 28,996 | $ 41,254
Fair Value Percentage of Total Portfolio |  | 7.20% | 8.80%
Subordinated Debt |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 8,059 | $ 7,990
Fair Value |  | $ 1,740 | $ 1,224
Fair Value Percentage of Total Portfolio |  | 0.40% | 0.30%
Collateral Loan Obligations |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 5,318 | $ 9,103
Fair Value |  | $ 5,193 | $ 8,968
Fair Value Percentage of Total Portfolio |  | 1.30% | 1.90%
Joint Ventures |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 66,747 | $ 71,415
Fair Value |  | $ 54,153 | $ 59,287
Fair Value Percentage of Total Portfolio |  | 13.40% | 12.70%
Equity |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | $ 31,921 | $ 31,280
Fair Value |  | $ 24,762 | $ 20,533
Fair Value Percentage of Total Portfolio |  | 6.10% | 4.40%
Asset Manager Affiliates |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost | [2] | $ 17,791 | $ 17,791
Derivatives |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Cost/Amortized Cost |  | 31 | $ 31
Fair Value |  | $ 220 |
Fair Value Percentage of Total Portfolio |  | 0.00% |
[1] | Represents the equity investment in the Asset Manager Affiliates.
[2] | Represents the equity investment in the Asset Manager Affiliates.

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