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INVESTMENTS - Waccamaw River LLC (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
loan
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
loan
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
loan
Dec. 31, 2022
USD ($)
Aug. 12, 2022
USD ($)
Jul. 08, 2021
USD ($)
Feb. 08, 2021
USD ($)
May 13, 2020
USD ($)
Schedule of Investments [Line Items]                    
Total dividend income $ 9,841,000 $ 8,515,000 $ 30,051,000 $ 26,639,000            
Fair Value 2,416,714,000   2,416,714,000   $ 2,488,715,000          
Waccamaw River, LLC                    
Schedule of Investments [Line Items]                    
Total dividend income 500,000   3,100,000 1,500,000            
Distributions of realized gains by investment companies $ 0   $ 300,000              
Investment owned, outstanding loans | loan 8,766   8,766   21,435          
Average loan amount $ 8,605   $ 8,605   $ 10,338          
Investment company, remaining average life to maturity     3 years 24 days   40 months          
Investment company, weighted average interest rate     11.90%   12.70%          
Waccamaw River, LLC | Consumer Loan                    
Schedule of Investments [Line Items]                    
Fair Value 58,200,000   $ 58,200,000   $ 182,300,000          
Waccamaw River, LLC | Cash and Cash Equivalents                    
Schedule of Investments [Line Items]                    
Fair Value 4,000,000   4,000,000   6,600,000          
All Member Of Waccamaw River LLC                    
Schedule of Investments [Line Items]                    
Total contributed capital 125,000,000   125,000,000              
Waccamaw River, LLC                    
Schedule of Investments [Line Items]                    
Dividends 2,300,000 $ 0 17,100,000 $ 7,300,000            
Waccamaw River, LLC | JPMorgan Chase Bank N.A. Non-Recourse Loan | Secured Debt                    
Schedule of Investments [Line Items]                    
Long-term debt, gross         71,000,000.0          
Waccamaw River, LLC | Barclay Bank PLC Non-Recourse Loan | Secured Debt                    
Schedule of Investments [Line Items]                    
Long-term debt, gross         51,300,000          
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [1]         0 $ 0        
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [1]         0 1,263,000        
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [1]         0 0        
Investment, Identifier [Axis]: 1WorldSync, Inc., IT Consulting & Other Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 7,067,000   7,067,000              
Investment, Identifier [Axis]: 1WorldSync, Inc., IT Consulting & Other Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[7]         7,124,000          
Investment, Identifier [Axis]: A.T. Holdings II LTD, Other Financial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[9] 8,367,000   8,367,000              
Investment, Identifier [Axis]: A.T. Holdings II LTD, Other Financial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10]         11,688,000          
Investment, Identifier [Axis]: AD Bidco, Inc., Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 9,918,000   9,918,000              
Investment, Identifier [Axis]: AD Bidco, Inc., Technology, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] (72,000)   (72,000)              
Investment, Identifier [Axis]: AD Bidco, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (27,000)   (27,000)              
Investment, Identifier [Axis]: ADB Safegate, Aerospace & Defense, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,296,000 [2],[3],[4],[9]   6,296,000 [2],[3],[4],[9]   5,392,000 [6],[7],[10],[12]          
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Transportation Services, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         537,000          
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Transportation Services, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 510,000   510,000              
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Transportation Services, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,460,000 [2],[3],[4]   6,460,000 [2],[3],[4]   6,402,000 [6],[7],[15]          
Investment, Identifier [Axis]: AMMC CLO 22, Limited Series 2018-22A, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value [9],[16] 2,542,000   2,542,000              
Investment, Identifier [Axis]: AMMC CLO 23, Ltd. Series 2020-23A, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value [9],[16] 1,348,000   1,348,000              
Investment, Identifier [Axis]: AMMC CLO 23, Ltd. Series 2020-23A, Multi-Sector Holdings, Subordinated Structured Notes 1                    
Schedule of Investments [Line Items]                    
Fair Value [10],[13],[17]         2,468,000          
Investment, Identifier [Axis]: AMMC CLO 23, Ltd. Series 2020-23A, Multi-Sector Holdings, Subordinated Structured Notes 2                    
Schedule of Investments [Line Items]                    
Fair Value [10],[17]         1,476,000          
Investment, Identifier [Axis]: APC1 Holding, Diversified Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,548,000 [3],[4],[9],[18]   2,548,000 [3],[4],[9],[18]   2,505,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: APOG Bidco Pty Ltd, Healthcare, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 968,000 [3],[4],[9],[20]   968,000 [3],[4],[9],[20]   2,086,000 [6],[7],[10],[21]          
Investment, Identifier [Axis]: AQA Acquisition Holding, Inc., High Tech Industries, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 20,000,000 [2],[3],[4]   20,000,000 [2],[3],[4]   19,938,000 [6],[7],[12]          
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value [7]         703,000          
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 861,000   861,000              
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,530,000 [3],[4],[22]   7,530,000 [3],[4],[22]   9,035,000 [6],[7],[15]          
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] 0   0              
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         (9,000)          
Investment, Identifier [Axis]: ATL II MRO Holdings Inc, Transportation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         8,250,000          
Investment, Identifier [Axis]: ATL II MRO Holdings Inc, Transportation, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         0          
Investment, Identifier [Axis]: ATL II MRO Holdings Inc., Transportation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 8,196,000   8,196,000              
Investment, Identifier [Axis]: ATL II MRO Holdings Inc., Transportation, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (15,000)   (15,000)              
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,045,000   7,045,000              
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3] 1,000   1,000              
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3] 2,000   2,000              
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value         6,332,000          
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class A Convertible Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         5,858,000          
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class A Convertible Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 6,220,000   6,220,000              
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class B Convertible Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         1,950,000          
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class B Convertible Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 2,196,000   2,196,000              
Investment, Identifier [Axis]: Acclime Holdings HK Limited, Business Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[24] 2,447,000   2,447,000              
Investment, Identifier [Axis]: Acclime Holdings HK Limited, Business services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[7],[10]         2,461,000          
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         512,000          
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 411,000   411,000              
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,919,000 [2],[3],[4]   11,919,000 [2],[3],[4]   11,768,000 [6],[7],[12]          
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,821,000 [2],[3],[4],[11]   1,821,000 [2],[3],[4],[11]   1,602,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Acogroup, Business Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,414,000 [3],[4],[9],[25]   6,414,000 [3],[4],[9],[25]   7,226,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Adhefin International, Industrial Other, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] 1,444,000   1,444,000              
Investment, Identifier [Axis]: Adhefin International, Industrial Other, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 401,000   401,000              
Investment, Identifier [Axis]: Adhefin International, Industrial Other, First Lien Senior Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19],[23]         1,778,000          
Investment, Identifier [Axis]: Adhefin International, Industrial Other, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 350,000   350,000              
Investment, Identifier [Axis]: Adhefin International, Industrial Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19]         300,000          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A1 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         697,000          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A1 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 561,000   561,000              
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A1 Partnership Units Class A2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 145,000   145,000              
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A1 Partnership Units Class B1 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 0   0              
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A1 Partnership Units Class B2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 0   0              
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         180,000          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class B1 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         0          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class B2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         0          
Investment, Identifier [Axis]: Air Canada 2020-2 Class B Pass Through Trust, Airlines, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value         3,587,000          
Investment, Identifier [Axis]: Air Canada 2020-2 Class B Pass Through Trust, Structured Products, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 3,014,000   3,014,000              
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         7,633,000          
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Aerospace & Defense, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 7,606,000   7,606,000              
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Aerospace & Defense, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 1,283,000   1,283,000              
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Aerospace & Defense, First Lien Senior Secured Term Loan, 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         1,296,000          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc,Diversified Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         3,226,000          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc,Diversified Manufacturing,Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (12,000)          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., Diversified Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 2,710,000   2,710,000              
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., Diversified Manufacturing, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (37,000)   (37,000)              
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., Diversified Manufacturing, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 3,304,000   3,304,000              
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., Diversified Manufacturing, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] 0   0              
Investment, Identifier [Axis]: AlliA Insurance Brokers NV, Insurance, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,588,000 [3],[4],[9],[11],[25]   4,588,000 [3],[4],[9],[11],[25]   3,443,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: Alpine SG, LLC, High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 23,024,000 [2],[3],[4],[16]   23,024,000 [2],[3],[4],[16]   22,792,000 [6],[7],[12],[17]          
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Class B Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,327,000 [4],[9],[14]   1,327,000 [4],[9],[14]   1,188,000 [7],[10],[13]          
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9] 310,000   310,000              
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Subordinated Loan Notes                    
Schedule of Investments [Line Items]                    
Fair Value 5,536,000 [4],[9]   5,536,000 [4],[9]   4,824,000 [7],[10]          
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Warrant                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         529,000          
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 811,000   811,000              
Investment, Identifier [Axis]: Americo Chemical Products, LLC, Chemicals, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 113,000   113,000              
Investment, Identifier [Axis]: Americo Chemical Products, LLC, Chemicals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[22] 1,706,000   1,706,000              
Investment, Identifier [Axis]: Americo Chemical Products, LLC, Chemicals, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] 0   0              
Investment, Identifier [Axis]: Americo Chemicals Products, LLC, Chemicals, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         89,000          
Investment, Identifier [Axis]: Americo Chemicals Products, LLC, Chemicals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15]         1,920,000          
Investment, Identifier [Axis]: Americo Chemicals Products, LLC, Chemicals, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         (4,000)          
Investment, Identifier [Axis]: Amtech LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         2,988,000          
Investment, Identifier [Axis]: Amtech LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         242,000          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,219,000 [3],[4],[9],[18]   3,219,000 [3],[4],[9],[18]   3,173,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 972,000 [3],[4],[9],[18]   972,000 [3],[4],[9],[18]   958,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,705,000 [3],[4],[9],[18]   1,705,000 [3],[4],[9],[18]   1,678,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 1,006,000 [2],[3],[4],[9]   1,006,000 [2],[3],[4],[9]   1,002,000 [6],[7],[10],[12]          
Investment, Identifier [Axis]: Anju Software, Inc. Application Software, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[26]         9,404,000          
Investment, Identifier [Axis]: Anju Software, Inc. Application Software, Super Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[23]         817,000          
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,947,000 [3],[4],[9],[27]   1,947,000 [3],[4],[9],[27]   1,858,000 [6],[7],[10],[28]          
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[27] 1,473,000   1,473,000              
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, First Lien Senior Secured Term Loan1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[28]         1,358,000          
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, Subordinated Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 321,000 [4],[9]   321,000 [4],[9]   285,000 [7],[10]          
Investment, Identifier [Axis]: Apidos CLO XXIV, Series 2016-24A, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 3,953,000 [9],[16]   3,953,000 [9],[16]   5,885,000 [10],[17]          
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         0          
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 16,000   16,000              
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,043,000 [3],[4],[9],[25]   2,043,000 [3],[4],[9],[25]   1,982,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         4,000          
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 0   0              
Investment, Identifier [Axis]: Apus Bidco Limited, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,864,000 [3],[4],[9],[30]   3,864,000 [3],[4],[9],[30]   3,621,000 [6],[7],[10],[28]          
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,426,000 [3],[4],[9],[11],[30]   6,426,000 [3],[4],[9],[11],[30]   5,839,000 [6],[7],[10],[23],[31]          
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[31]         1,706,000          
Investment, Identifier [Axis]: Arc Education, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,865,000 [3],[4],[9],[11],[18]   3,865,000 [3],[4],[9],[11],[18]   3,791,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: Arch Global Precision LLC, Industrial Machinery, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,720,000 [2],[3],[4]   8,720,000 [2],[3],[4]   8,993,000 [6],[7],[12]          
Investment, Identifier [Axis]: Archimede, Consumer Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,170,000 [3],[4],[9],[18]   6,170,000 [3],[4],[9],[18]   6,304,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[9],[14]   0 [4],[9],[14]   0 [7],[10],[13]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Equity Loan Notes                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10]         42,000          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Equity Loan Notes                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9] 40,000   40,000              
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 1,905,000   1,905,000              
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 127,000 [2],[3],[4],[9]   127,000 [2],[3],[4],[9]   125,000 [6],[7],[10],[12]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,698,000 [3],[4],[9],[11],[27]   1,698,000 [3],[4],[9],[11],[27]   307,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19]         1,408,000          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 4                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[28]         1,632,000          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 5                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[23],[28]         (28,000)          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10]         42,000          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9] 40,000   40,000              
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9] 789,000   789,000              
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Second Lien Term Loan Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10]         734,000          
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC ), Air Freight & Logistics, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         3,790,000          
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC ), Air Freight & Logistics, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         4,709,000          
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC), Air Freight & Logistics, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 2,546,000   2,546,000              
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC), Air Freight & Logistics, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 3,172,000   3,172,000              
Investment, Identifier [Axis]: Astra Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,596,000 [3],[4],[9],[11],[27]   2,596,000 [3],[4],[9],[11],[27]   2,380,000 [6],[7],[10],[23],[28]          
Investment, Identifier [Axis]: Astra Bidco Limited, Healthcare, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] 239,000   239,000              
Investment, Identifier [Axis]: Astra Bidco Limited, Healthcare, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 85,000   85,000              
Investment, Identifier [Axis]: Auxi International, Commercial Finance, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25] 1,466,000   1,466,000              
Investment, Identifier [Axis]: Auxi International, Commercial Finance, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 843,000 [3],[4],[9],[30]   843,000 [3],[4],[9],[30]   1,427,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: Auxi International, Commercial Finance, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[31]         788,000          
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,199,000 [3],[4],[9],[11],[32]   2,199,000 [3],[4],[9],[11],[32]   2,190,000 [6],[7],[10],[23],[33]          
Investment, Identifier [Axis]: Aviation Technical Services, Inc., Aerospace & Defense, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[17]         29,162,000          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         288,000          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 254,000   254,000              
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,796,000 [2],[3],[4],[11]   4,796,000 [2],[3],[4],[11]   4,809,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[4],[11]   0 [2],[3],[4],[11]   (3,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,749,000 [4]   1,749,000 [4]   1,529,000 [7]          
Investment, Identifier [Axis]: BKF Buyer, Inc., Construction and Building, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4] 1,004,000   1,004,000              
Investment, Identifier [Axis]: BKF Buyer, Inc., Construction and Building, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[22] 8,015,000   8,015,000              
Investment, Identifier [Axis]: BKF Buyer, Inc., Construction and Building, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[22] (59,000)   (59,000)              
Investment, Identifier [Axis]: BNI Global, LLC, Other Industrial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[34] 10,008,000   10,008,000              
Investment, Identifier [Axis]: BPG Holdings IV Corp, Capital Goods, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         13,401,000          
Investment, Identifier [Axis]: BPG Holdings IV Corp, Diversified Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 12,978,000   12,978,000              
Investment, Identifier [Axis]: BVI Medical, Inc., Healthcare, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,395,000 [3],[4],[18]   10,395,000 [3],[4],[18]   9,541,000 [6],[7],[19]          
Investment, Identifier [Axis]: Bariacum S.A, Consumer Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,348,000 [3],[4],[9],[25]   3,348,000 [3],[4],[9],[25]   3,314,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: Benify (Bennevis AB), High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 931,000 [3],[4],[9],[35]   931,000 [3],[4],[9],[35]   1,096,000 [6],[7],[10],[36]          
Investment, Identifier [Axis]: Beyond Risk Management, Inc., Other Financial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,176,000 [2],[3],[4],[11]   5,176,000 [2],[3],[4],[11]   2,944,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Bidwax, Non-durable Consumer Goods, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,621,000 [3],[4],[9],[25]   7,621,000 [3],[4],[9],[25]   7,672,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[7],[10]         2,020,000          
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[12]         353,000          
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[28]         801,000          
Investment, Identifier [Axis]: Biolam Group, Consumer Non-cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19],[23]         2,266,000          
Investment, Identifier [Axis]: Biolam Group, ConsumerNon-cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[25],[37] 1,656,000   1,656,000              
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [38] 8,092,000   8,092,000   7,166,000 5,647,000        
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [38] 1,381,000   1,381,000   4,869,000 9,147,000        
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[16],[37] 1,381,000   1,381,000              
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 8,092,000 [4],[16]   8,092,000 [4],[16]   7,166,000 [6],[7],[15],[17]          
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[17],[26]         4,869,000          
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13],[17]         0          
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14],[16] 0   0              
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [38] 0   0   0 0        
Investment, Identifier [Axis]: Bounteous, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,116,000 [2],[3],[4]   4,116,000 [2],[3],[4]   1,605,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Environmental Industries, Municipal Revenue Bond                    
Schedule of Investments [Line Items]                    
Fair Value 28,347,000 [4]   28,347,000 [4]   28,802,000          
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Environmental Industries, Preferred Stock- Series A                    
Schedule of Investments [Line Items]                    
Fair Value [7]         15,003,000          
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Environmental Industries, Preferred Stock- Series A                    
Schedule of Investments [Line Items]                    
Fair Value 14,431,000   14,431,000              
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,669,000 [3],[4],[22]   4,669,000 [3],[4],[22]   4,540,000 [6],[7],[12]          
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, LLC units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         930,000          
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, LLC units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 1,174,000   1,174,000              
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,019,000 [3],[4],[11],[22]   1,019,000 [3],[4],[11],[22]   839,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Brightline Trains Florida LLC, Transportation, Senior Secured Note                    
Schedule of Investments [Line Items]                    
Fair Value [7]         4,750,000          
Investment, Identifier [Axis]: Brightpay Limited, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,284,000 [3],[4],[9],[11],[25]   2,284,000 [3],[4],[9],[11],[25]   2,250,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: British Airways 2020-1 Class B Pass Through Trust, Airlines, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value         610,000          
Investment, Identifier [Axis]: British Airways 2020-1 Class B Pass Through Trust, Structured Products, First Lien Senior Secured Bond                    
Schedule of Investments [Line Items]                    
Fair Value 539,000   539,000              
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, Commercial Services & Supplies, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 15,670,000 [3],[4],[9],[30]   15,670,000 [3],[4],[9],[30]   14,403,000 [6],[7],[10],[31]          
Investment, Identifier [Axis]: Brook & Whittle Holding Corp., Containers, Packaging & Glass, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,542,000 [2],[3],[16]   2,542,000 [2],[3],[16]   2,596,000 [6],[7],[12],[17]          
Investment, Identifier [Axis]: Brown Machine Group Holdings, LLC, Industrial Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,747,000 [2],[3],[4]   5,747,000 [2],[3],[4]   5,954,000 [6],[7],[15]          
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Auto Parts & Equipment, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 441,000 [4],[14]   441,000 [4],[14]   462,000 [7],[13]          
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Auto Parts & Equipment, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,545,000 [3],[4],[24]   4,545,000 [3],[4],[24]   4,368,000 [6],[7],[15]          
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 11,032,000   11,032,000              
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,331,000 [2],[3],[4]   1,331,000 [2],[3],[4]   4,636,000 [6],[7],[12]          
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         1,275,000          
Investment, Identifier [Axis]: CAi Software, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,222,000 [2],[3],[4],[11]   1,222,000 [2],[3],[4],[11]   (61,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: CCFF Buyer, LLC, Food & Beverage, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 3,766,000   3,766,000              
Investment, Identifier [Axis]: CCFF Buyer, LLC, Food & Beverage, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 287,000   287,000              
Investment, Identifier [Axis]: CCFF Buyer, LLC, Food & Beverage, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (10,000)   (10,000)              
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 12,822,000   12,822,000              
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,361,000 [2],[3],[4]   1,361,000 [2],[3],[4]   12,968,000 [6],[7],[12]          
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         1,344,000          
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         1,190,000          
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 1,546,000   1,546,000              
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[4],[11]   0 [2],[3],[4],[11]   (33,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., Internet & Direct Marketing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 9,777,000   9,777,000              
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., Internet & Direct Marketing, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 3,641,000 [2],[3],[4]   3,641,000 [2],[3],[4]   13,399,000 [6],[7],[12]          
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,797,000 [2],[3],[4]   3,797,000 [2],[3],[4]   3,742,000 [6],[7],[15]          
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15]         609,000          
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         59,000          
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 0   0              
Investment, Identifier [Axis]: CSL DualCom, Tele-communications, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,159,000 [3],[4],[9],[11],[39]   2,159,000 [3],[4],[9],[11],[39]   2,052,000 [6],[7],[10],[23],[40]          
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[15],[17]         4,684,000          
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, 2024 LIFO Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 4,051,000   4,051,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 581,000   581,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, First Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 2,758,000   2,758,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, Second Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 576,000   576,000              
Investment, Identifier [Axis]: CW Group Holdings, LLC, High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,739,000 [2],[3],[4]   2,739,000 [2],[3],[4]   2,759,000 [6],[7],[12]          
Investment, Identifier [Axis]: CW Group Holdings, LLC, High Tech Industries, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         289,000          
Investment, Identifier [Axis]: CW Group Holdings, LLC, High Tech Industries, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 303,000   303,000              
Investment, Identifier [Axis]: Caldwell & Gregory LLC, Services: Business, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 18,413,000   18,413,000              
Investment, Identifier [Axis]: Caldwell & Gregory LLC, Services: Business, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (38,000)   (38,000)              
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class A Equity                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[9],[14]   0 [4],[9],[14]   0 [7],[10],[13]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class C - Warrants                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[9],[14]   0 [4],[9],[14]   0 [7],[10],[13]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class X Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 0   0              
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9] 0   0              
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 332,000 [3],[4],[9],[37],[41]   332,000 [3],[4],[9],[37],[41]   1,322,000 [6],[7],[10],[42]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Super Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[11] 157,000   157,000              
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 770,000   770,000              
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,266,000 [2],[3],[4],[9]   4,266,000 [2],[3],[4],[9]   4,240,000 [6],[7],[10],[12]          
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         982,000          
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, LLC Units - Class X Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         0          
Investment, Identifier [Axis]: Cascade Residential Services LLC, Electric, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 3,941,000   3,941,000              
Investment, Identifier [Axis]: Cascade Residential Services LLC, Electric, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 61,000 [2],[3],[4],[11]   61,000 [2],[3],[4],[11]   (8,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: Cascade Residential Services LLC,Electric,First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         2,567,000          
Investment, Identifier [Axis]: Catawba River Limited, Finance Companies, Structured - Junior Note                    
Schedule of Investments [Line Items]                    
Fair Value 2,977,000 [4],[9]   2,977,000 [4],[9]   943,000 [7],[10],[23]          
Investment, Identifier [Axis]: Celebration Bidco, LLC, Chemicals, Plastics, & Rubber, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 12,692,000   12,692,000              
Investment, Identifier [Axis]: Celebration Bidco, LLC, Chemicals, Plastics, & Rubber, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,214,000 [2],[4]   6,214,000 [2],[4]   6,214,000 [7],[12]          
Investment, Identifier [Axis]: Celebration Bidco, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [1] 12,692,000   12,692,000   12,177,000 0        
Investment, Identifier [Axis]: Celebration Bidco, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [1] 6,214,000   6,214,000   6,214,000 0        
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Diversified Financial Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 3,177,000   3,177,000              
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Diversified Financial Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19]         3,144,000          
Investment, Identifier [Axis]: Ceres Pharma NV, Pharma-ceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[29]         3,307,000          
Investment, Identifier [Axis]: Ceres Pharma NV, Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25] 3,379,000   3,379,000              
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Auto Collision Repair Centers, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         6,602,000          
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Auto Collision Repair Centers, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         599,000          
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure ,LLC Units, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         12,177,000          
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 15,678,000   15,678,000              
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,444,000 [4]   7,444,000 [4]   6,868,000 [7]          
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure, Subordinated Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [4] 15,741,000   15,741,000              
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure, Subordinated Term Loan2                    
Schedule of Investments [Line Items]                    
Fair Value [7]         15,649,000          
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [1] 15,678,000   15,678,000   12,160,000 [7],[13] 0        
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [1] 15,741,000   15,741,000   15,649,000 0        
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [1] 7,444,000   7,444,000   6,868,000 0        
Investment, Identifier [Axis]: Cobham Slip Rings SAS, Diversified Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,303,000 [2],[3],[4],[9]   1,303,000 [2],[3],[4],[9]   1,294,000 [6],[7],[10],[12]          
Investment, Identifier [Axis]: Coherus Biosciences, Inc., Biotechnology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 3,895,000   3,895,000              
Investment, Identifier [Axis]: Coherus Biosciences, Inc., Biotechnology, Royalty Rights                    
Schedule of Investments [Line Items]                    
Fair Value [4] 3,819,000   3,819,000              
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, Class B Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         176,000          
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, Class B Partnership Units (33,324.69 units)                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 190,000   190,000              
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15]         13,345,000          
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 146,000 [4],[14]   146,000 [4],[14]   142,000 [7],[13]          
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 637,000 [4]   637,000 [4]   622,000 [7]          
Investment, Identifier [Axis]: Comply365, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,129,000 [3],[4],[22]   13,129,000 [3],[4],[22]   5,525,000 [6],[7],[12]          
Investment, Identifier [Axis]: Comply365, LLC, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 5,581,000 [3],[4],[22]   5,581,000 [3],[4],[22]   12,997,000 [6],[7],[12]          
Investment, Identifier [Axis]: Comply365, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[11],[22]   0 [3],[4],[11],[22]   (22,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: Contabo Finco S.À R.L, Internet Software & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,150,000 [3],[4],[9],[18]   5,150,000 [3],[4],[9],[18]   5,103,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [10],[13]         133,000          
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, Equipment Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[26]         22,976,000          
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         211,000          
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 220,000   220,000              
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class B Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         505,000          
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class B Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 400,000   400,000              
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,810,000 [3],[4],[9],[11],[18]   4,810,000 [3],[4],[9],[11],[18]   4,659,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,968,000 [2],[3],[4]   6,968,000 [2],[3],[4]   5,944,000 [6],[7],[15],[23]          
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         90,000          
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 0   0              
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,866,000 [3],[4],[22]   1,866,000 [3],[4],[22]   1,873,000 [6],[7],[12]          
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 113,000 [4],[14]   113,000 [4],[14]   96,000 [7],[13]          
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (7,000)          
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] 0   0              
Investment, Identifier [Axis]: David Wood Baking UK Ltd, Food Products, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[27] 1,491,000   1,491,000              
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 18,000   18,000              
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         41,000          
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 22,000   22,000              
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,539,000 [2],[3],[4]   1,539,000 [2],[3],[4]   1,638,000 [6],[7],[15]          
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         (9,000)          
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 332,000   332,000              
Investment, Identifier [Axis]: Distinct Holdings, Inc., Systems Software, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         6,416,000          
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC, Business Equipment & Services, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 285,000   285,000              
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC, Business Equipment & Services, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4] 713,000   713,000              
Investment, Identifier [Axis]: Dragon Bidco, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,790,000 [3],[4],[9],[18]   2,790,000 [3],[4],[9],[18]   2,734,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: DreamStart Bidco SAS (d/b/a SmartTrade), Diversified Financial Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,373,000 [3],[4],[9],[18]   2,373,000 [3],[4],[9],[18]   2,349,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Dryden 43 Senior Loan Fund, Series 2016-43A, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 1,411,000 [9],[16]   1,411,000 [9],[16]   1,647,000 [10],[17]          
Investment, Identifier [Axis]: Dryden 49 Senior Loan Fund, Series 2017-49A, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 984,000 [9],[14],[16]   984,000 [9],[14],[16]   3,319,000 [10],[13],[17]          
Investment, Identifier [Axis]: Dune Group, Health Care Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] 85,000   85,000              
Investment, Identifier [Axis]: Dune Group, Health Care Equipment, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,324,000 [2],[3],[4],[9]   1,324,000 [2],[3],[4],[9]   115,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: Dune Group, Health Care Equipment, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[12]         1,401,000          
Investment, Identifier [Axis]: Dunlipharder B.V., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 997,000 [2],[3],[4],[9]   997,000 [2],[3],[4],[9]   993,000 [6],[7],[10],[12]          
Investment, Identifier [Axis]: Dwyer Instruments, Inc., Electric, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,627,000 [2],[3],[4]   14,627,000 [2],[3],[4]   14,479,000 [6],[7],[12]          
Investment, Identifier [Axis]: EFC International, Automotive, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 396,000 [4],[14]   396,000 [4],[14]   301,000 [7],[13]          
Investment, Identifier [Axis]: EFC International, Automotive, Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 784,000 [4]   784,000 [4]   764,000 [7]          
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Diversified Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,597,000 [2],[3],[4]   11,597,000 [2],[3],[4]   11,155,000 [6],[7],[12]          
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Diversified Manufacturing, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         2,233,000          
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Diversified Manufacturing, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 160,000   160,000              
Investment, Identifier [Axis]: EPS NASS Parent, Inc., Electrical Components & Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         5,740,000          
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Air Transportation, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         491,000          
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Air Transportation, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 376,000   376,000              
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Air Transportation, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,461,000 [3],[4],[22]   9,461,000 [3],[4],[22]   8,844,000 [6],[7],[12]          
Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value               $ 4,500,000    
Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC, Revolver, Funded                    
Schedule of Investments [Line Items]                    
Fair Value 6,800,000   6,800,000   5,500,000          
Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC, Revolver, Unfunded                    
Schedule of Investments [Line Items]                    
Fair Value             $ 22,700,000 13,600,000    
Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC, Second Lien Senior Secured Loan                    
Schedule of Investments [Line Items]                    
Fair Value               $ 89,800,000    
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7]         145,799,000          
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 136,854,000   136,854,000              
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 6,818,000 [4],[11],[22]   6,818,000 [4],[11],[22]   5,545,000 [7],[15],[23]          
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,545,000 [4]   4,545,000 [4]   4,545,000 [7]          
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, LLC units                    
Schedule of Investments [Line Items]                    
Fair Value [1] 136,854,000   136,854,000   145,799,000 135,066,000        
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [1] 6,818,000   6,818,000   5,545,000 5,273,000        
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [1] 4,545,000   4,545,000   4,545,000 4,545,000        
Investment, Identifier [Axis]: Electrical Components International, Inc., Electrical Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[24] 10,451,000   10,451,000              
Investment, Identifier [Axis]: Ellkay, LLC, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         4,430,000          
Investment, Identifier [Axis]: Ellkay, LLC, Healthcare and Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[24] 4,277,000   4,277,000              
Investment, Identifier [Axis]: Entact Environmental Services, Inc., Environmental Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,618,000 [2],[3],[4]   6,618,000 [2],[3],[4]   7,245,000 [6],[7],[12]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25],[37] 791,000   791,000              
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value (1,410,000) [3],[4],[9],[11],[25],[37]   (1,410,000) [3],[4],[9],[11],[25],[37]   1,047,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 391,000 [2],[3],[4],[9],[37]   391,000 [2],[3],[4],[9],[37]   700,000 [6],[7],[10],[12]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 1,231,000 [3],[4],[9],[30],[37]   1,231,000 [3],[4],[9],[30],[37]   2,096,000 [6],[7],[10],[28]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[9],[37]   0 [4],[9],[37]   543,000 [7],[10]          
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,550,000 [3],[4],[9],[11],[32]   1,550,000 [3],[4],[9],[11],[32]   1,535,000 [6],[7],[10],[23],[33]          
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, Technology, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[33]         20,000          
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 6,092,000   6,092,000              
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         6,324,000          
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Consumer Cyclical, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         138,000          
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Consumer Cyclical, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 129,000   129,000              
Investment, Identifier [Axis]: F24 (Stairway BidCo Gmbh), Software Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,988,000 [3],[4],[9],[34]   1,988,000 [3],[4],[9],[34]   1,933,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,752,000 [3],[4],[22]   4,752,000 [3],[4],[22]   4,768,000 [6],[7],[12]          
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, LP Interest                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         16,000          
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, LP Interest                    
Schedule of Investments [Line Items]                    
Fair Value [4] 15,000   15,000              
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         72,000          
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 65,000   65,000              
Investment, Identifier [Axis]: Faraday, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,667,000 [3],[4],[9],[11],[18]   1,667,000 [3],[4],[9],[11],[18]   1,632,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: Ferrellgas L.P., Oil & Gas Equipment & Services, Opco Preferred Units                    
Schedule of Investments [Line Items]                    
Fair Value [7]         2,670,000          
Investment, Identifier [Axis]: Ferrellgas L.P., Oil & Gas Equipment & Services, Opco Preferred Units (2,886 units)                    
Schedule of Investments [Line Items]                    
Fair Value [4] 2,857,000   2,857,000              
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings Inc., Business Equipment & Services, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7]         5,266,000          
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings Inc., Business Equipment & Services, Preferred Stock (6,582.7 shares)                    
Schedule of Investments [Line Items]                    
Fair Value [4] 4,805,000   4,805,000              
Investment, Identifier [Axis]: Finaxy Holding, Banking, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25] 4,564,000   4,564,000              
Investment, Identifier [Axis]: Finaxy Holding, Banking, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9] 2,071,000   2,071,000              
Investment, Identifier [Axis]: Finaxy Holding, Banking, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10]         2,009,000          
Investment, Identifier [Axis]: Finaxy Holding,Banking,First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19]         4,431,000          
Investment, Identifier [Axis]: Fineline Technologies, Inc, Consumer Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         1,275,000          
Investment, Identifier [Axis]: Fineline Technologies, Inc., Consumer Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 1,263,000   1,263,000              
Investment, Identifier [Axis]: Finexvet, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,934,000 [3],[4],[9],[25]   4,934,000 [3],[4],[9],[25]   4,230,000 [6],[7],[10],[23],[29]          
Investment, Identifier [Axis]: FitzMark Buyer, LLC, Cargo & Transportation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,132,000 [3],[4],[22]   4,132,000 [3],[4],[22]   4,073,000 [6],[7],[15]          
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         855,000          
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 551,000   551,000              
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,761,000 [2],[3],[4]   12,761,000 [2],[3],[4]   13,404,000 [6],[7],[12]          
Investment, Identifier [Axis]: Flexential Issuer, LLC, Information Technology, Structured Secured Note - Class C                    
Schedule of Investments [Line Items]                    
Fair Value 15,337,000   15,337,000   13,187,000          
Investment, Identifier [Axis]: Flywheel Re Segregated Portfolio 2022-4, Investment Funds, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         3,196,000          
Investment, Identifier [Axis]: Flywheel Re Segregated Portfolio 2022-4, Investment Funds, Preferred Stock (2,828,286 shares)                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 3,648,000   3,648,000              
Investment, Identifier [Axis]: Footco 40 Limited, Media & Entertainment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 230,000 [3],[4],[9],[11],[18]   230,000 [3],[4],[9],[11],[18]   1,808,000 [6],[7],[10],[23],[28]          
Investment, Identifier [Axis]: Footco 40 Limited, Media & Entertainment, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[27] 1,665,000   1,665,000              
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, Class A LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 127,000   127,000              
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, Class B LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 97,000   97,000              
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 491,000   491,000              
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 5,609,000   5,609,000              
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 0   0              
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Other Financial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,727,000 [2],[3],[4],[11]   8,727,000 [2],[3],[4],[11]   2,480,000 [6],[7],[12]          
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Other Financial, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (10,000)   (10,000)              
Investment, Identifier [Axis]: FragilePak LLC, Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,510,000 [2],[3],[4]   4,510,000 [2],[3],[4]   4,384,000 [6],[7],[12]          
Investment, Identifier [Axis]: FragilePak LLC, Transportation Services, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         632,000          
Investment, Identifier [Axis]: FragilePak LLC, Transportation Services, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 673,000   673,000              
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,450,000 [2],[3],[4]   10,450,000 [2],[3],[4]   10,573,000 [6],[7],[12]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,222,000 [4],[14]   1,222,000 [4],[14]   880,000 [7],[13]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (15,000)          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (26,000)   (26,000)              
Investment, Identifier [Axis]: GCDL LLC, Healthcare, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4] 243,000   243,000              
Investment, Identifier [Axis]: GCDL LLC, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 529,000   529,000              
Investment, Identifier [Axis]: GCDL LLC, Healthcare, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] (2,000)   (2,000)              
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[9],[14]   0 [4],[9],[14]   0 [7],[10],[13]          
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[34],[37] 141,000   141,000              
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 272,000 [4],[9],[11]   272,000 [4],[9],[11]   265,000 [6],[7],[10],[43]          
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[23]         124,000          
Investment, Identifier [Axis]: Global Academic Group Limited, Industrial Other, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[32] 2,538,000   2,538,000              
Investment, Identifier [Axis]: Global Academic Group Limited, Industrial Other, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 4,352,000 [3],[4],[9],[11],[44]   4,352,000 [3],[4],[9],[11],[44]   2,478,000 [6],[7],[10],[45]          
Investment, Identifier [Axis]: Global Academic Group Limited, Industrial Other, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[23],[46]         4,295,000          
Investment, Identifier [Axis]: Gojo Industries, Inc. ,Industrial Other,First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         12,359,000          
Investment, Identifier [Axis]: Gojo Industries, Inc., Industrial Other, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[22] 12,997,000   12,997,000              
Investment, Identifier [Axis]: Graphpad Software, LLC, Internet Software & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 9,481,000   9,481,000              
Investment, Identifier [Axis]: Graphpad Software, LLC, Internet Software & Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (4,000)   (4,000)              
Investment, Identifier [Axis]: Greenhill II BV, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] 1,009,000   1,009,000              
Investment, Identifier [Axis]: Greenhill II BV, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19],[23]         894,000          
Investment, Identifier [Axis]: Groupe Guemas, Brokerage, Asset Managers & Exchanges, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25] 5,107,000   5,107,000              
Investment, Identifier [Axis]: Groupe Guemas,Brokerage, Asset Managers & Exchanges ,First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[29]         5,006,000          
Investment, Identifier [Axis]: Groupe Product Life, Consumer Non-cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19]         1,059,000          
Investment, Identifier [Axis]: Groupe Product Life, ConsumerNon-cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] 932,000   932,000              
Investment, Identifier [Axis]: Gulf Finance, LLC, Oil & Gas Exploration & Production, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[12]         570,000          
Investment, Identifier [Axis]: Gusto Aus BidCo Pty Ltd, ConsumerNon-Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[32] 2,316,000   2,316,000              
Investment, Identifier [Axis]: Gusto Aus BidCo Pty Ltd., Consumer Non-Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[23],[45]         2,235,000          
Investment, Identifier [Axis]: HEKA Invest, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] 5,227,000   5,227,000              
Investment, Identifier [Axis]: HEKA Invest, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19],[23]         5,080,000          
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,434,000 [2],[3],[4],[11]   10,434,000 [2],[3],[4],[11]   11,355,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (7,000)          
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (68,000)   (68,000)              
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Advertising, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 11,059,000   11,059,000              
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Advertising, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         10,816,000          
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[32] 642,000   642,000              
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[23],[45]         674,000          
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Healthcare, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4] 12,371,000   12,371,000              
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Healthcare, Subordinated Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [7]         11,012,000          
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,239,000 [2],[3],[4]   7,239,000 [2],[3],[4]   7,295,000 [6],[7],[15]          
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         0          
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 0   0              
Investment, Identifier [Axis]: Heilbron (f/k/a Sucsez (Bolt Bidco B.V.)), Insurance, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,265,000 [3],[4],[9],[25]   3,265,000 [3],[4],[9],[25]   3,155,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 118,000   118,000              
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[22] 7,238,000   7,238,000              
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] (7,000)   (7,000)              
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         101,000          
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         7,101,000          
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         342,000          
Investment, Identifier [Axis]: Herbalife Ltd., Food Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[9],[22] 3,188,000   3,188,000              
Investment, Identifier [Axis]: Home Care Assistance, LLC, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,520,000 [2],[3],[4]   3,520,000 [2],[3],[4]   3,428,000 [6],[7],[12]          
Investment, Identifier [Axis]: HomeX Services Group LLC, Home Construction, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,502,000 [2],[3],[4],[11]   1,502,000 [2],[3],[4],[11]   1,274,000 [6],[7],[15],[23]          
Investment, Identifier [Axis]: HomeX Services Group LLC, Home Construction, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         (7,000)          
Investment, Identifier [Axis]: HomeX Services Group LLC, Home Construction, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 0   0              
Investment, Identifier [Axis]: Honour Lane Logistics Holdings Limited, Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,629,000 [3],[4],[9],[24]   6,629,000 [3],[4],[9],[24]   6,160,000 [6],[7],[10],[15]          
Investment, Identifier [Axis]: Hydratech Holdings, Inc., Distributors, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 4,175,000   4,175,000              
Investment, Identifier [Axis]: Hydratech Holdings, Inc., Distributors, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 62,000   62,000              
Investment, Identifier [Axis]: Hygie 31 Holding, Pharma-ceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[29]         1,739,000          
Investment, Identifier [Axis]: Hygie 31 Holding, Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25] 1,615,000   1,615,000              
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [1] 0   0   2,013,000 4,496,000        
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Construction & Building, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         2,013,000          
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Construction & Building, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         3,917,000          
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Construction & Building, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [1] 0   0   4,519,000 [6],[7],[12] 4,098,000        
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [1] 0   0   3,917,000 3,917,000        
Investment, Identifier [Axis]: IM Square, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,723,000 [3],[4],[9],[18]   2,723,000 [3],[4],[9],[18]   2,713,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: INOS 19-090 GmbH, Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,173,000 [3],[4],[9],[18]   5,173,000 [3],[4],[9],[18]   5,711,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Healthcare First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         6,616,000          
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[24] 6,735,000   6,735,000              
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Healthcare, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (18,000)          
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Healthcare, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[24] 0   0              
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         715,000          
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 727,000   727,000              
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 785,000 [3],[4],[24]   785,000 [3],[4],[24]   12,757,000 [6],[7],[12]          
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[24] 11,915,000   11,915,000              
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         67,000          
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[24] 197,000   197,000              
Investment, Identifier [Axis]: Ice House America, L.L.C., Consumer Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 4,049,000   4,049,000              
Investment, Identifier [Axis]: Ice House America, L.L.C., Consumer Products, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 287,000   287,000              
Investment, Identifier [Axis]: Ice House America, L.L.C., Consumer Products, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 142,000   142,000              
Investment, Identifier [Axis]: Infoniqa Holdings GmbH, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,933,000 [3],[4],[9],[25]   2,933,000 [3],[4],[9],[25]   2,879,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: Innovad Group II BV, Beverage, Food & Tobacco, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25] 6,783,000   6,783,000              
Investment, Identifier [Axis]: Innovad Group II BV, Beverage, Food & Tobacco, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,072,000 [3],[4],[9],[47]   1,072,000 [3],[4],[9],[47]   6,203,000 [6],[7],[10],[23],[29]          
Investment, Identifier [Axis]: Innovad Group II BV, Beverage, Food & Tobacco, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[48]         1,035,000          
Investment, Identifier [Axis]: Innovative XCessories & Services, LLC, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,789,000 [2],[3],[16]   2,789,000 [2],[3],[16]   2,469,000 [5],[6],[17]          
Investment, Identifier [Axis]: Interstellar Group B.V., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 64,000 [3],[4],[9],[18]   64,000 [3],[4],[9],[18]   1,676,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: Interstellar Group B.V., Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] 1,549,000   1,549,000              
Investment, Identifier [Axis]: InvoCare Limited, Consumer Cyclical Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,108,000 [3],[4],[9],[11],[32]   2,108,000 [3],[4],[9],[11],[32]   2,051,000 [6],[7],[10],[23],[45]          
Investment, Identifier [Axis]: Iqor US Inc., Services: Business, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[15],[17]         2,622,000          
Investment, Identifier [Axis]: Isagenix International, LLC, Wholesale, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[14],[16]   0 [4],[14],[16]   0 [7],[13]          
Investment, Identifier [Axis]: Isagenix International, LLC, Wholesale, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 223,000 [2],[3],[4],[16]   223,000 [2],[3],[4],[16]   718,000 [6],[12],[17]          
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), Trading Companies & Distributors, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,459,000 [3],[4],[9],[18]   5,459,000 [3],[4],[9],[18]   4,778,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: Ivanti Software, Inc., High Tech Industries, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,740,000 [2],[3],[16]   3,740,000 [2],[3],[16]   4,800,000 [6],[12],[17]          
Investment, Identifier [Axis]: JF Acquisition, LLC, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,712,000 [2],[3],[4]   3,712,000 [2],[3],[4]   3,598,000 [6],[7],[12]          
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25] 1,200,000   1,200,000              
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,957,000 [3],[4],[9],[24]   1,957,000 [3],[4],[9],[24]   1,176,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 4,632,000 [3],[4],[9],[24]   4,632,000 [3],[4],[9],[24]   6,648,000 [5],[6],[7],[10]          
Investment, Identifier [Axis]: JetBlue 2019-1 Class B Pass Through Trust, Structured Products, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 2,825,000   2,825,000   3,026,000          
Investment, Identifier [Axis]: Jocassee Partners LLC                    
Schedule of Investments [Line Items]                    
Total contributed capital 35,000,000   35,000,000   35,000,000          
Investment, Identifier [Axis]: Jocassee Partners LLC, Investment Funds & Vehicles, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 40,871,000 [9],[11]   40,871,000 [9],[11]   41,053,000 [10],[23]          
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 40,871,000   40,871,000   41,053,000 [1] 40,088,000 [1]        
Investment, Identifier [Axis]: Jon Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,920,000 [3],[4],[9],[11],[44]   3,920,000 [3],[4],[9],[11],[44]   3,844,000 [6],[7],[10],[23],[46]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,481,000 [2],[3],[4]   3,481,000 [2],[3],[4]   3,414,000 [6],[7],[12]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7]         228,000          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 278,000   278,000              
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (8,000)          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 0   0              
Investment, Identifier [Axis]: Kano Laboratories LLC, Chemicals, Plastics & Rubber, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,388,000 [2],[3],[4]   8,388,000 [2],[3],[4]   5,545,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Kano Laboratories LLC, Chemicals, Plastics & Rubber, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         224,000          
Investment, Identifier [Axis]: Kano Laboratories LLC, Chemicals, Plastics & Rubber, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 211,000   211,000              
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [1]         0 1,181,000        
Investment, Identifier [Axis]: Kemmerer Operations, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [1]         0 1,565,000        
Investment, Identifier [Axis]: Kene Acquisition, Inc. (En Engineering), Oil & Gas Equipment & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         7,031,000          
Investment, Identifier [Axis]: Keystone Bidco B.V., Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 732,000   732,000              
Investment, Identifier [Axis]: Keystone Bidco B.V., Pharmaceuticals, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] (4,000)   (4,000)              
Investment, Identifier [Axis]: Keystone Bidco B.V., Pharmaceuticals, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[9] 0   0              
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, Media & Entertainment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,190,000 [2],[3],[4]   13,190,000 [2],[3],[4]   9,116,000 [6],[7],[12]          
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, Media & Entertainment, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         599,000          
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, Media & Entertainment, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 721,000   721,000              
Investment, Identifier [Axis]: Kona Buyer, LLC, High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         8,413,000          
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,891,000 [3],[4],[9],[11],[25]   1,891,000 [3],[4],[9],[11],[25]   1,854,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,718,000 [4],[9]   1,718,000 [4],[9]   1,587,000 [7],[10]          
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 703,000 [3],[4],[9],[11],[24]   703,000 [3],[4],[9],[11],[24]   659,000 [5],[6],[7],[10],[23]          
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[7],[10],[23]         16,000          
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[24] 35,000   35,000              
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,050,000 [2],[3],[4]   10,050,000 [2],[3],[4]   10,096,000 [6],[7],[12]          
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7]         239,000          
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 179,000   179,000              
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         400,000          
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (11,000)   (11,000)              
Investment, Identifier [Axis]: Learfield Communications, LLC, Broadcasting, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [14] 3,712,000   3,712,000              
Investment, Identifier [Axis]: Learfield Communications, LLC, Broadcasting, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[22] 5,456,000   5,456,000              
Investment, Identifier [Axis]: Learfield Communications, LLC, Broadcasting, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[15]         5,311,000          
Investment, Identifier [Axis]: Learfield Communications, LLC, Broadcasting, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         4,037,000          
Investment, Identifier [Axis]: Legal Solutions Holdings, Business Services, Senior Subordinated Loan                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[37],[49]   0 [4],[37],[49]   0 [7],[26],[50]          
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Consumer Goods: Durable, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,765,000 [2],[3],[4],[16]   2,765,000 [2],[3],[4],[16]   2,675,000 [6],[7],[12],[17]          
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Consumer Goods: Durable, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[17],[23]         (275,000)          
Investment, Identifier [Axis]: LivTech Purchaser, Inc., Business Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 862,000 [2],[3],[4]   862,000 [2],[3],[4]   860,000 [6],[7],[12]          
Investment, Identifier [Axis]: LogMeIn, Inc., High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[15],[17]         1,274,000          
Investment, Identifier [Axis]: Long Term Care Group, Inc., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,572,000 [2],[3],[4]   7,572,000 [2],[3],[4]   6,308,000 [6],[7],[15]          
Investment, Identifier [Axis]: MB Purchaser, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] 2,196,000   2,196,000              
Investment, Identifier [Axis]: MB Purchaser, LLC, Technology, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 68,000   68,000              
Investment, Identifier [Axis]: MB Purchaser, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] (5,000)   (5,000)              
Investment, Identifier [Axis]: MC Group Ventures Corporation, Business Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,019,000 [2],[3],[4],[11]   5,019,000 [2],[3],[4],[11]   4,133,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: MC Group Ventures Corporation, Business Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[24] 4,094,000   4,094,000              
Investment, Identifier [Axis]: MC Group Ventures Corporation, Business Services, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 835,000 [4],[14]   835,000 [4],[14]   778,000 [7],[13]          
Investment, Identifier [Axis]: MI OpCo Holdings, Inc., Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[22] 6,243,000   6,243,000              
Investment, Identifier [Axis]: MNS Buyer, Inc., Construction and Building, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 895,000 [3],[4],[22]   895,000 [3],[4],[22]   901,000 [6],[7],[15]          
Investment, Identifier [Axis]: MNS Buyer, Inc., Construction and Building, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 104,000 [4],[14]   104,000 [4],[14]   82,000 [7],[13]          
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value [38] 9,762,000   9,762,000   9,762,000 7,149,000        
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Common Equity Interest                    
Schedule of Investments [Line Items]                    
Fair Value [38] 7,034,000   7,034,000   15,430,000 9,675,000        
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive, Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,762,000 [4],[9],[49]   9,762,000 [4],[9],[49]   9,762,000 [7],[10],[50]          
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive, Common Equity interest                    
Schedule of Investments [Line Items]                    
Fair Value 7,034,000 [4],[9],[14],[49]   7,034,000 [4],[9],[14],[49]   15,430,000 [7],[10],[13],[50]          
Investment, Identifier [Axis]: MVC Private Equity Fund LP, General Partnership Interest                    
Schedule of Investments [Line Items]                    
Fair Value 14,000   14,000   24,000 45,000        
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Investment Funds & Vehicles, General Partnership Interest                    
Schedule of Investments [Line Items]                    
Fair Value 14,000 [4],[9],[14],[49]   14,000 [4],[9],[14],[49]   24,000 [10],[13],[50]          
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Investment Funds & Vehicles, Limited Partnership Interest                    
Schedule of Investments [Line Items]                    
Fair Value 556,000 [4],[9],[14],[49]   556,000 [4],[9],[14],[49]   981,000 [10],[13],[50]          
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Limited Partnership Interest                    
Schedule of Investments [Line Items]                    
Fair Value 556,000   556,000   981,000 1,793,000        
Investment, Identifier [Axis]: Magnetite XIX, Limited, Multi-Sector Holdings, Subordinated Notes                    
Schedule of Investments [Line Items]                    
Fair Value 5,083,000 [2],[9],[16]   5,083,000 [2],[9],[16]   5,067,000 [10],[12],[17]          
Investment, Identifier [Axis]: Magnetite XIX, Limited, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 7,363,000 [9],[16]   7,363,000 [9],[16]   8,181,000 [10],[17]          
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 58,000 [3],[4],[9],[25],[37]   58,000 [3],[4],[9],[25],[37]   1,777,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25],[37] 413,000   413,000              
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19],[23]         6,000          
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25],[37] (80,000)   (80,000)              
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, Super Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[37] 190,000   190,000              
Investment, Identifier [Axis]: Marshall Excelsior Co., Capital Goods, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         10,462,000          
Investment, Identifier [Axis]: Marshall Excelsior Co., Capital Goods, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         1,914,000          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Containers, Packaging & Glass, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 4,037,000 [3],[4],[39]   4,037,000 [3],[4],[39]   2,764,000 [6],[7],[12]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Containers, Packaging & Glass, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,803,000 [2],[3],[4]   1,803,000 [2],[3],[4]   3,946,000 [6],[7],[28]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Containers, Packaging & Glass, Revolver 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[39] (12,000)   (12,000)              
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Containers, Packaging & Glass, Revolver 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (10,000)   (10,000)              
Investment, Identifier [Axis]: Median B.V., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,581,000 [3],[9],[30]   9,581,000 [3],[9],[30]   8,595,000 [6],[10],[31]          
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc., Healthcare, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,874,000 [2],[3]   2,874,000 [2],[3]   3,708,000 [6],[12]          
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 0   0              
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 3,899,000   3,899,000              
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 87,000   87,000              
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 30,000   30,000              
Investment, Identifier [Axis]: Mercell Holding AS, Technology, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 132,000 [4],[9],[14]   132,000 [4],[9],[14]   128,000 [7],[10],[13]          
Investment, Identifier [Axis]: Mercell Holding AS, Technology, Class B Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         51,000          
Investment, Identifier [Axis]: Mercell Holding AS, Technology, Class B Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 25,000   25,000              
Investment, Identifier [Axis]: Mercell Holding AS, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,957,000 [3],[4],[9],[11],[51]   2,957,000 [3],[4],[9],[11],[51]   3,041,000 [6],[7],[10],[23],[52]          
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited., Non-durable Consumer Goods, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,985,000 [3],[4],[9],[11],[32]   7,985,000 [3],[4],[9],[11],[32]   7,784,000 [6],[7],[10],[23],[33]          
Investment, Identifier [Axis]: Moonlight Bidco Limited, Healthcare, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         1,380,000          
Investment, Identifier [Axis]: Moonlight Bidco Limited, Healthcare, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 197,000   197,000              
Investment, Identifier [Axis]: Moonlight Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,987,000 [3],[4],[9],[11],[27]   1,987,000 [3],[4],[9],[11],[27]   1,832,000 [6],[7],[10],[23],[28]          
Investment, Identifier [Axis]: Murphy Midco Limited, Media, Diversified & Production, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,757,000 [3],[4],[9],[30]   1,757,000 [3],[4],[9],[30]   1,670,000 [6],[7],[10],[31]          
Investment, Identifier [Axis]: Music Reports, Inc., Media & Entertainment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,500,000 [2],[3],[4]   6,500,000 [2],[3],[4]   6,884,000 [6],[7],[12]          
Investment, Identifier [Axis]: NAW Buyer LLC, Technology, Equity Co Invest                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         473,000          
Investment, Identifier [Axis]: NAW Buyer LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,880,000 [2],[3],[4],[11]   11,880,000 [2],[3],[4],[11]   11,446,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: NAW Buyer LLC, Technology, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 463,000   463,000              
Investment, Identifier [Axis]: NAW Buyer LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         335,000          
Investment, Identifier [Axis]: NAW Buyer LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 0   0              
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,274,000 [2],[3],[4]   6,274,000 [2],[3],[4]   6,204,000 [6],[7],[12]          
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 569,000 [4],[14]   569,000 [4],[14]   633,000 [7],[13]          
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         417,000          
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 603,000   603,000              
Investment, Identifier [Axis]: NGS US Finco, LLC (f/k/a Dresser Natural Gas Solutions), Energy Equipment & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15]         4,655,000          
Investment, Identifier [Axis]: NPM Investments 28 B.V., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] 2,216,000   2,216,000              
Investment, Identifier [Axis]: NPM Investments 28 B.V., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19],[23]         2,175,000          
Investment, Identifier [Axis]: Napa Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 19,219,000 [3],[4],[9],[32]   19,219,000 [3],[4],[9],[32]   18,321,000 [6],[7],[10],[45]          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Class A Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         535,000          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Class A Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 567,000   567,000              
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Class B Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         229,000          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Class B Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 118,000   118,000              
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,087,000 [2],[3],[4]   5,087,000 [2],[3],[4]   5,562,000 [6],[7],[12]          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (8,000)          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 0   0              
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[22] 2,933,000   2,933,000              
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,639,000 [3],[4],[22]   2,639,000 [3],[4],[22]   2,918,000 [6],[7],[15]          
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15]         2,620,000          
Investment, Identifier [Axis]: NeoxCo, Internet Software & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,167,000 [3],[4],[9],[11],[25]   2,167,000 [3],[4],[9],[11],[25]   2,090,000 [6],[7],[10],[23],[29]          
Investment, Identifier [Axis]: Next Holdco, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 7,340,000   7,340,000              
Investment, Identifier [Axis]: Next Holdco, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 0   0              
Investment, Identifier [Axis]: Next Holdco, LLC,Technology,First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         7,236,000          
Investment, Identifier [Axis]: Next Holdco, LLC,Technology,Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         (11,000)          
Investment, Identifier [Axis]: Northstar Recycling, LLC, Environmental Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,431,000 [2],[3],[4]   2,431,000 [2],[3],[4]   2,434,000 [6],[7],[12]          
Investment, Identifier [Axis]: Novotech Aus Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[7],[10],[23]         3,984,000          
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,286,000 [3],[4],[22]   8,286,000 [3],[4],[22]   5,485,000 [6],[7],[15]          
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         276,000          
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 567,000   567,000              
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         (12,000)          
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] (6,000)   (6,000)              
Investment, Identifier [Axis]: OAC Holdings I Corp, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,548,000 [3],[4],[22]   3,548,000 [3],[4],[22]   3,454,000 [6],[7],[12]          
Investment, Identifier [Axis]: OAC Holdings I Corp, Automotive, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (47,000)          
Investment, Identifier [Axis]: OAC Holdings I Corp, Automotive, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] 0   0              
Investment, Identifier [Axis]: OG III B.V., Containers & Glass Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,475,000 [3],[4],[9],[18]   3,475,000 [3],[4],[9],[18]   3,390,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: ORTEC INTERNATIONAL NEWCO B.V. Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19]         985,000          
Investment, Identifier [Axis]: ORTEC INTERNATIONAL NEWCO B.V., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 1,001,000   1,001,000              
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 12,914,000   12,914,000              
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 994,000 [2],[3],[4],[11]   994,000 [2],[3],[4],[11]   12,934,000 [6],[7],[12]          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (107,000)          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (22,000)          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 162,000 [4]   162,000 [4]   174,000 [7]          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (16,000)   (16,000)              
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[14]   0 [4],[14]   0 [7],[13]          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7]         2,085,000          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4] 2,734,000   2,734,000              
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Super Senior Takeback Loan                    
Schedule of Investments [Line Items]                    
Fair Value 549,000 [3],[4]   549,000 [3],[4]   549,000 [7]          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Takeback Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7]         2,933,000          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Takeback Term loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4] 2,933,000   2,933,000              
Investment, Identifier [Axis]: Ocular Therapeutix, Inc., Pharma-ceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[15]         3,812,000          
Investment, Identifier [Axis]: Ocular Therapeutix, Inc., Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[22] 4,849,000   4,849,000              
Investment, Identifier [Axis]: Offen Inc., Transportation: Cargo, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,702,000 [4],[16],[22]   3,702,000 [4],[16],[22]   3,691,000 [5],[7],[17]          
Investment, Identifier [Axis]: Omni Intermediate Holdings, LLC, Transportation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         7,864,000          
Investment, Identifier [Axis]: Options Technology Ltd., Computer Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[7],[10]         2,249,000          
Investment, Identifier [Axis]: Oracle Vision Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,070,000 [3],[4],[9],[30]   3,070,000 [3],[4],[9],[30]   2,918,000 [6],[7],[10],[31]          
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 331,000   331,000              
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 533,000 [2],[3],[4],[9]   533,000 [2],[3],[4],[9]   326,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[12]         531,000          
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, Class A-2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7]         44,000          
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, Class A-2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 50,000   50,000              
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,940,000 [2],[3],[4]   2,940,000 [2],[3],[4]   10,319,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 4,341,000 [2],[3],[4]   4,341,000 [2],[3],[4]   2,930,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 7,238,000   7,238,000              
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] 890,000   890,000              
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,382,000 [2],[3],[4],[9]   1,382,000 [2],[3],[4],[9]   820,000 [6],[7],[10],[23],[43]          
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, Technology, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[15]         1,305,000          
Investment, Identifier [Axis]: Panoche Energy Center LLC, Electric, First Lien Senior Secured Bond                    
Schedule of Investments [Line Items]                    
Fair Value 3,404,000   3,404,000              
Investment, Identifier [Axis]: Panoche Energy Center LLC, Electric, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7]         4,224,000          
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 2,864,000   2,864,000              
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,497,000 [2],[3],[4],[9]   1,497,000 [2],[3],[4],[9]   2,804,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[12]         1,482,000          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 606,000 [3],[4],[22]   606,000 [3],[4],[22]   605,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Healthcare, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         298,000          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Healthcare, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 250,000   250,000              
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), Diversified Financial Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 2,168,000   2,168,000              
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), Diversified Financial Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,586,000 [2],[3],[4],[9]   2,586,000 [2],[3],[4],[9]   2,327,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), Diversified Financial Services, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[12]         2,804,000          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9] 181,000   181,000              
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class C                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9] 180,000   180,000              
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class D                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9] 180,000   180,000              
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class E                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9] 8,905,000   8,905,000              
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class A                    
Schedule of Investments [Line Items]                    
Fair Value 179,000 [4],[9]   179,000 [4],[9]   172,000 [7],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10]         173,000          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class C                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10]         167,000          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class D                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10]         166,000          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class E                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10]         8,503,000          
Investment, Identifier [Axis]: Permaconn BidCo Pty Ltd, Tele-communications, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[45]         2,743,000          
Investment, Identifier [Axis]: Permaconn BidCo Pty Ltd, Telecommunications, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[32] 2,837,000   2,837,000              
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 960,000 [2],[3],[4]   960,000 [2],[3],[4]   1,118,000 [6],[7],[12]          
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,116,000 [4]   1,116,000 [4]   1,285,000 [7]          
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[4],[11]   0 [2],[3],[4],[11]   0 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 52,315,000 [2],[3],[4]   52,315,000 [2],[3],[4]   50,498,000 [6],[7],[12]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class A                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         1,297,000          
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class A                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 1,245,000   1,245,000              
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class B                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         438,000          
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class B                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 420,000   420,000              
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class C                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 0   0              
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class CC                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         0          
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class D                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         125,000          
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class D                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 120,000   120,000              
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, Chemicals, Plastics & Rubber, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[14]   0 [4],[14]   0 [7],[13]          
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, Chemicals, Plastics & Rubber, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 568,000 [3],[4],[16],[22]   568,000 [3],[4],[16],[22]   936,000 [6],[7],[15],[17]          
Investment, Identifier [Axis]: Premium Franchise Brands, LLC, Research & Consulting Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,979,000 [2],[3],[4]   9,979,000 [2],[3],[4]   7,511,000 [6],[7],[12]          
Investment, Identifier [Axis]: Premium Invest, Brokerage, Asset Managers & Exchanges, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,320,000 [3],[4],[9],[11],[18]   9,320,000 [3],[4],[9],[11],[18]   9,031,000 [6],[7],[10],[23],[29]          
Investment, Identifier [Axis]: Preqin MC Limited, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,789,000 [3],[4],[9],[24]   2,789,000 [3],[4],[9],[24]   2,778,000 [5],[6],[7],[10]          
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 7,651,000   7,651,000              
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, High Tech Industries, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 236,000   236,000              
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, High Tech Industries, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] (31,000)   (31,000)              
Investment, Identifier [Axis]: Process Equipment, Inc. (ProcessBarron), Industrial Air & Material Handling Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,351,000 [3],[4],[24]   5,351,000 [3],[4],[24]   5,462,000 [6],[7],[12]          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         340,000          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 325,000   325,000              
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[4],[11]   0 [2],[3],[4],[11]   5,293,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 5,292,000   5,292,000              
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (6,000)          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 439,000   439,000              
Investment, Identifier [Axis]: Professional Datasolutions, Inc. (PDI), Application Software, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         1,783,000          
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,621,000 [3],[4],[22]   1,621,000 [3],[4],[22]   1,635,000 [5],[6],[7]          
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         220,000          
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 196,000   196,000              
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[7],[23]         274,000          
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] 315,000   315,000              
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Second Lien Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7]         73,000          
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4] 73,000   73,000              
Investment, Identifier [Axis]: Proppants Holding, LLC, Energy: Oil & Gas, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[17]         0          
Investment, Identifier [Axis]: Proppants Holding, LLC, Energy: Oil & Gas, LLC Units (1,506,254 units)                    
Schedule of Investments [Line Items]                    
Fair Value [4],[16] 0   0              
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,768,000 [3],[4],[9],[25]   1,768,000 [3],[4],[9],[25]   1,630,000 [6],[7],[10],[23],[29]          
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 2,115,000 [3],[4],[9],[25]   2,115,000 [3],[4],[9],[25]   2,110,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: QPE7 SPV1 BidCo Pty Ltd, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,902,000 [3],[4],[9],[53]   1,902,000 [3],[4],[9],[53]   1,852,000 [6],[7],[10],[21]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         64,000          
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 88,000   88,000              
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 704,000 [2],[3],[4]   704,000 [2],[3],[4]   592,000 [6],[7],[12]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         159,000          
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 171,000   171,000              
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (5,000) [2],[3],[4],[11]   (5,000) [2],[3],[4],[11]   (2,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: Questel Unite, Business Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,052,000 [2],[3],[4],[9]   7,052,000 [2],[3],[4],[9]   6,732,000 [6],[7],[10],[12]          
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,145,000 [3],[4],[22]   6,145,000 [3],[4],[22]   6,001,000 [5],[6],[7],[23]          
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 126,000 [3],[4],[11],[22]   126,000 [3],[4],[11],[22]   80,000 [5],[6],[7],[23]          
Investment, Identifier [Axis]: RA Outdoors, LLC, High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,715,000 [3],[4],[16],[22]   12,715,000 [3],[4],[16],[22]   12,723,000 [6],[7],[12],[17]          
Investment, Identifier [Axis]: RA Outdoors, LLC, High Tech Industries, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[17],[23]         778,000          
Investment, Identifier [Axis]: RA Outdoors, LLC, High Tech Industries, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[16],[22] 1,221,000   1,221,000              
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[18],[37] 6,428,000   6,428,000              
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,319,000 [2],[3],[4],[37]   1,319,000 [2],[3],[4],[37]   9,498,000 [6],[7],[19]          
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         1,949,000          
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Air Freight & Logistics, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 157,000   157,000              
Investment, Identifier [Axis]: RPX Corporation, Research & Consulting Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 26,504,000 [2],[3],[4]   26,504,000 [2],[3],[4]   4,732,000 [6],[7],[12]          
Investment, Identifier [Axis]: RPX Corporation, Research & Consulting Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] (45,000)   (45,000)              
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class A Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13],[17]         0          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class A Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14],[16] 0   0              
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class B Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[14],[16]   0 [4],[14],[16]   0 [7],[13],[17]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class C Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13],[17]         73,000          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class C Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14],[16] 61,000   61,000              
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13],[17]         0          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14],[16] 0   0              
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[17]         8,717,000          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[17],[23]         524,000          
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 11,035,000   11,035,000              
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 577,000   577,000              
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 431,000   431,000              
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         9,890,000          
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         570,000          
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         505,000          
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,324,000 [2],[3],[4]   11,324,000 [2],[3],[4]   11,442,000 [6],[7],[12]          
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Technology, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         103,000          
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Technology, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 67,000   67,000              
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Home Furnishings, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,239,000 [2],[3],[4]   4,239,000 [2],[3],[4]   4,167,000 [6],[7],[12]          
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Home Furnishings, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         67,000          
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Home Furnishings, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 69,000   69,000              
Investment, Identifier [Axis]: Resolute Investment Managers, Inc., Banking, Finance, Insurance & Real Estate, Common Stock ($38,571 shares)                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14],[16] 0   0              
Investment, Identifier [Axis]: Resolute Investment Managers, Inc., Banking, Finance, Insurance & Real Estate, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[17]         762,000          
Investment, Identifier [Axis]: Resonetics, LLC, Health Care Equipment, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         3,991,000          
Investment, Identifier [Axis]: Rhondda Financing No. 1 DAC, Finance Companies, Structured - Junior Note                    
Schedule of Investments [Line Items]                    
Fair Value 29,926,000 [4],[9]   29,926,000 [4],[9]   29,586,000 [7],[10],[23]          
Investment, Identifier [Axis]: Riedel Beheer B.V., Food & Beverage, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,111,000 [3],[4],[9],[18]   2,111,000 [3],[4],[9],[18]   2,078,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Rocade Holdings LLC, Common LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [1] 1,076,000   1,076,000   844,000 0        
Investment, Identifier [Axis]: Rocade Holdings LLC, Other Financial, Common LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         844,000          
Investment, Identifier [Axis]: Rocade Holdings LLC, Other Financial, Common LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 1,076,000   1,076,000              
Investment, Identifier [Axis]: Rocade Holdings LLC, Other Financial, Preferred LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[12],[23]         73,113,000          
Investment, Identifier [Axis]: Rocade Holdings LLC, Other Financial, Preferred LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [2],[4],[11] 79,504,000   79,504,000              
Investment, Identifier [Axis]: Rocade Holdings LLC, Preferred LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [1] 79,504,000   79,504,000   73,113,000 0        
Investment, Identifier [Axis]: Rock Labor LLC, Media: Diversified & Production, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         1,534,000          
Investment, Identifier [Axis]: Rock Labor LLC, Media: Diversified & Production, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,426,000 [2],[3],[4]   6,426,000 [2],[3],[4]   6,422,000 [6],[7],[15]          
Investment, Identifier [Axis]: Rock Labor LLC, Media: Diversified & Production, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 1,548,000   1,548,000              
Investment, Identifier [Axis]: Rock Labor LLC, Media: Diversified & Production, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         (30,000)          
Investment, Identifier [Axis]: Rock Labor LLC, Media: Diversified & Production, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (22,000)   (22,000)              
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,083,000 [2],[3],[4]   8,083,000 [2],[3],[4]   7,164,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         388,000          
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (9,000)   (9,000)              
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, Media Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,687,000 [2],[3],[4]   8,687,000 [2],[3],[4]   9,241,000 [6],[7],[12]          
Investment, Identifier [Axis]: Russell Investments US Institutional Holdco, Inc., Capital Markets, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 494,000   494,000              
Investment, Identifier [Axis]: SBP Holdings LP, Industrial Other, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,522,000 [3],[4],[11],[22]   13,522,000 [3],[4],[11],[22]   13,442,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: SBP Holdings LP, Industrial Other, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (19,000)          
Investment, Identifier [Axis]: SBP Holdings LP, Industrial Other, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 488,000   488,000              
Investment, Identifier [Axis]: SISU ACQUISITIONCO., INC., Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,604,000 [2],[3],[4],[11]   6,604,000 [2],[3],[4],[11]   6,463,000 [6],[7],[15],[23]          
Investment, Identifier [Axis]: SN BUYER, LLC, Health Care Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         10,592,000          
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, Automotive, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4] 274,000   274,000              
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 6,787,000   6,787,000              
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, Automotive, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (24,000)   (24,000)              
Investment, Identifier [Axis]: SSCP Pegasus Midco Limited, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,678,000 [3],[4],[9],[11],[27]   4,678,000 [3],[4],[9],[11],[27]   3,416,000 [6],[7],[10],[23],[28]          
Investment, Identifier [Axis]: SSCP Spring Bidco 3 Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,005,000 [3],[4],[9],[30]   1,005,000 [3],[4],[9],[30]   947,000 [6],[7],[10],[31]          
Investment, Identifier [Axis]: SVI International LLC, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 627,000   627,000              
Investment, Identifier [Axis]: SVI International LLC, Automotive, LLC Units ($207,921 units)                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 206,000   206,000              
Investment, Identifier [Axis]: SVI International LLC, Automotive, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (1,000)   (1,000)              
Investment, Identifier [Axis]: Safety Products Holdings, LLC, Non-durable Consumer Goods, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,703,000 [2],[3],[4]   14,703,000 [2],[3],[4]   11,567,000 [6],[7],[12]          
Investment, Identifier [Axis]: Safety Products Holdings, LLC, Non-durable Consumer Goods, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         468,000          
Investment, Identifier [Axis]: Safety Products Holdings, LLC, Non-durable Consumer Goods, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 500,000   500,000              
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 1,546,000   1,546,000              
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,411,000 [3],[4],[9],[11],[18]   2,411,000 [3],[4],[9],[11],[18]   2,585,000 [6],[7],[10],[19],[23]          
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,121,000 [3],[4],[9],[54]   2,121,000 [3],[4],[9],[54]   3,357,000 [6],[7],[10],[48]          
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[54] 913,000   913,000              
Investment, Identifier [Axis]: Sansidor BV, Services: Business, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[9] 573,000   573,000              
Investment, Identifier [Axis]: Scaled Agile, Inc., Research & Consulting Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,609,000 [2],[3],[4]   1,609,000 [2],[3],[4]   1,759,000 [6],[7],[12]          
Investment, Identifier [Axis]: Scaled Agile, Inc., Research & Consulting Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         48,000          
Investment, Identifier [Axis]: Scaled Agile, Inc., Research & Consulting Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 302,000   302,000              
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 3,509,000   3,509,000              
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 436,000 [2],[3],[4],[9]   436,000 [2],[3],[4],[9]   3,480,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[12]         437,000          
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19],[23]         410,000          
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] (22,000)   (22,000)              
Investment, Identifier [Axis]: Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[30] 2,012,000   2,012,000              
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan, 2023 Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [38] 3,906,000   3,906,000   3,866,000 0        
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan, Controlled                    
Schedule of Investments [Line Items]                    
Fair Value [38] 6,486,000   6,486,000   6,328,000 6,020,000        
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series A, Controlled                    
Schedule of Investments [Line Items]                    
Fair Value [38] 406,000   406,000   311,000 575,000        
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series B, Controlled                    
Schedule of Investments [Line Items]                    
Fair Value [38] 37,976,000   37,976,000   29,080,000 53,728,000        
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Term Loan, Controlled                    
Schedule of Investments [Line Items]                    
Fair Value [38] 11,191,000   11,191,000   10,867,000 10,534,000        
Investment, Identifier [Axis]: Security Holdings B.V, Senior Unsecured Term Loan, Controlled                    
Schedule of Investments [Line Items]                    
Fair Value [38] 2,471,000   2,471,000   2,236,000 2,015,000        
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,486,000 [4],[9],[49]   6,486,000 [4],[9],[49]   6,328,000 [7],[10],[50]          
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series A                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13],[50]         311,000          
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series A                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14],[49] 406,000   406,000              
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series B                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13],[50]         29,080,000          
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series B                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14],[49] 37,976,000   37,976,000              
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 3,906,000 [4],[9],[11],[49]   3,906,000 [4],[9],[11],[49]   3,866,000 [7],[10],[23],[50]          
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,191,000 [4],[9],[49]   11,191,000 [4],[9],[49]   10,867,000 [7],[10],[50]          
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[11],[49] 2,471,000   2,471,000              
Investment, Identifier [Axis]: Security Holdings B.V.,Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[23],[50]         2,236,000          
Investment, Identifier [Axis]: Sereni Capital NV, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[25] 978,000   978,000              
Investment, Identifier [Axis]: Sereni Capital NV, Consumer Cyclical, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,643,000 [3],[4],[9],[25]   1,643,000 [3],[4],[9],[25]   2,522,000 [6],[7],[10],[29]          
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Home Furnishings, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         791,000          
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Home Furnishings, Common Stock (109,127 shares)                    
Schedule of Investments [Line Items]                    
Fair Value [14] 611,000   611,000              
Investment, Identifier [Axis]: Shelf Bidco Ltd, Other Financial, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 5,448,000   5,448,000              
Investment, Identifier [Axis]: Shelf Bidco Ltd, Other Financial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[9] 34,710,000   34,710,000              
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         1,548,000          
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[12]         34,019,000          
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Joint Venture, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 41,297,000 [4],[9],[16]   41,297,000 [4],[9],[16]   39,172,000 [10],[17]          
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 41,297,000   41,297,000   39,172,000 37,950,000        
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV LLC (Sierra JV)                    
Schedule of Investments [Line Items]                    
Total contributed capital 110,100,000   110,100,000              
Investment, Identifier [Axis]: Sinari Invest, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,857,000 [3],[4],[9],[11],[25]   1,857,000 [3],[4],[9],[11],[25]   1,822,000 [6],[7],[10],[23],[29]          
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         288,000          
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 431,000   431,000              
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,537,000 [3],[4],[24]   9,537,000 [3],[4],[24]   9,332,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[24] 3,440,000   3,440,000              
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (38,000)          
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[24] 0   0              
Investment, Identifier [Axis]: Smartling, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,464,000 [3],[4],[22]   10,464,000 [3],[4],[22]   10,466,000 [6],[7],[15]          
Investment, Identifier [Axis]: Smartling, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         (12,000)          
Investment, Identifier [Axis]: Smartling, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] 0   0              
Investment, Identifier [Axis]: Smile Brands Group Inc., Health Care Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 4,126,000   4,126,000              
Investment, Identifier [Axis]: Smile Brands Group Inc., Health Care Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 558,000 [2],[3],[4]   558,000 [2],[3],[4]   4,533,000 [6],[7],[12]          
Investment, Identifier [Axis]: Soho Square III Debtco II SARL, Diversified Capital Markets, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10]         8,175,000          
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,727,000 [2],[3],[4]   14,727,000 [2],[3],[4]   15,140,000 [6],[7],[12]          
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         382,000          
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 325,000   325,000              
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 315,000 [2],[3],[4],[11]   315,000 [2],[3],[4],[11]   615,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Sound Point CLO XX, Ltd., Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 138,000 [9],[14],[16]   138,000 [9],[14],[16]   579,000 [10],[13],[17]          
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,625,000 [3],[4],[11],[24]   1,625,000 [3],[4],[11],[24]   1,858,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[24] 421,000   421,000              
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (2,000) [3],[4],[11],[24]   (2,000) [3],[4],[11],[24]   62,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Spatial Business Systems LLC, Electric, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,114,000 [2],[3],[4],[11]   11,114,000 [2],[3],[4],[11]   11,461,000 [6],[7],[15],[23]          
Investment, Identifier [Axis]: Spatial Business Systems LLC, Electric, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (48,000) [2],[3],[4],[11]   (48,000) [2],[3],[4],[11]   (21,000) [6],[7],[15],[23]          
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Enterprise Software & Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         13,719,000          
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Enterprise Software & Services, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         2,791,000          
Investment, Identifier [Axis]: Starnmeer B.V., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,500,000 [3],[4],[9],[24]   2,500,000 [3],[4],[9],[24]   2,490,000 [5],[6],[7],[10]          
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 17,720,000 [2],[3],[4],[11]   17,720,000 [2],[3],[4],[11]   12,825,000 [6],[7],[12]          
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 201,000 [2],[3],[4],[11]   201,000 [2],[3],[4],[11]   444,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Syniverse Holdings, Inc., Technology Distributors, Series A Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value 9,773,000 [4]   9,773,000 [4]   8,788,000 [7]          
Investment, Identifier [Axis]: Syntax Systems Ltd, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[15],[23]         1,997,000          
Investment, Identifier [Axis]: Syntax Systems Ltd, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[15],[23]         620,000          
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 83,000 [4],[14]   83,000 [4],[14]   73,000 [7],[13]          
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Technology, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,785,000 [4]   2,785,000 [4]   2,395,000 [7]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,036,000 [2],[3],[4],[11]   2,036,000 [2],[3],[4],[11]   810,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 590,000   590,000              
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, First Lien Senior Secured Term Loan1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         584,000          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         9,000          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 13,000   13,000              
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (7,000) [2],[3],[4],[11]   (7,000) [2],[3],[4],[11]   (10,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 7,792,000 [3],[4],[24]   7,792,000 [3],[4],[24]   7,915,000 [6],[7],[15]          
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,493,000 [3],[4],[11],[22]   2,493,000 [3],[4],[11],[22]   2,430,000 [6],[7],[15],[23]          
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 604,000 [3],[4],[11],[22]   604,000 [3],[4],[11],[22]   223,000 [6],[7],[15],[23]          
Investment, Identifier [Axis]: Tanqueray Bidco Limited, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[27] 1,820,000   1,820,000              
Investment, Identifier [Axis]: Tanqueray Bidco Limited, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[27] 0   0              
Investment, Identifier [Axis]: Tanqueray Bidco Limited, Technology. First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[23],[28]         1,730,000          
Investment, Identifier [Axis]: Team Air Distributing, LLC, Consumer Cyclical, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4] 78,000   78,000              
Investment, Identifier [Axis]: Team Air Distributing, LLC, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4] 702,000   702,000              
Investment, Identifier [Axis]: Team Air Distributing, LLC, Consumer Cyclical, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         420,000          
Investment, Identifier [Axis]: Team Air Distributing, LLC, Consumer Cyclical, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 392,000   392,000              
Investment, Identifier [Axis]: Team Air Distributing, LLC, Consumer Cyclical, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7]         590,000          
Investment, Identifier [Axis]: Team Car Care, LLC, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[17]         10,382,000          
Investment, Identifier [Axis]: Team Services Group, Services: Consumer, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[17]         9,646,000          
Investment, Identifier [Axis]: Team Services Group, Services: Consumer, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[7],[17]         4,694,000          
Investment, Identifier [Axis]: Technology Service Stream BidCo Pty Ltd, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[20] 756,000   756,000              
Investment, Identifier [Axis]: Techone B.V., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,875,000 [3],[4],[9],[18]   3,875,000 [3],[4],[9],[18]   3,814,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Techone B.V., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19],[23]         201,000          
Investment, Identifier [Axis]: Techone B.V., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] (6,000)   (6,000)              
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,340,000 [2],[3],[4]   8,340,000 [2],[3],[4]   6,226,000 [6],[7],[12]          
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (6,000)          
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (26,000)   (26,000)              
Investment, Identifier [Axis]: Terrybear, Inc., Consumer Products, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 137,000 [4],[14]   137,000 [4],[14]   115,000 [7],[13]          
Investment, Identifier [Axis]: Terrybear, Inc., Consumer Products, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 266,000 [4]   266,000 [4]   260,000 [7]          
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,825,000 [2],[3],[4]   1,825,000 [2],[3],[4]   830,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 824,000   824,000              
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         0          
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 0   0              
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[7]         3,578,000          
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[24] 3,704,000   3,704,000              
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Capital Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15]         12,680,000          
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Capital Equipment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         0          
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Capital Equipment, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7]         4,882,000          
Investment, Identifier [Axis]: The Hilb Group, LLC, Insurance Brokerage, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,390,000 [3],[4],[22]   11,390,000 [3],[4],[22]   11,317,000 [6],[7],[15],[23]          
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3] 3,595,000   3,595,000              
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         2,152,000          
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4] 2,342,000   2,342,000              
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         4,240,000          
Investment, Identifier [Axis]: Thompson Rivers LLC                    
Schedule of Investments [Line Items]                    
Total contributed capital                   $ 75,000,000
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 8,587,000 [4],[14]   8,587,000 [4],[14]   13,365,000 [13]          
Investment, Identifier [Axis]: Thompson Rivers LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 8,587,000   8,587,000   13,365,000 30,339,000        
Investment, Identifier [Axis]: Thompsonn Rivers LLC                    
Schedule of Investments [Line Items]                    
Total contributed capital 79,411,000   79,411,000   79,411,000          
Investment, Identifier [Axis]: Total Safety U.S. Inc., Diversified Support Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[15]         5,433,000          
Investment, Identifier [Axis]: Total Safety U.S. Inc., Diversified Support Services, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15]         3,717,000          
Investment, Identifier [Axis]: Trader Corporation, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,499,000 [3],[4],[9],[55]   4,499,000 [3],[4],[9],[55]   4,617,000 [6],[7],[10],[56]          
Investment, Identifier [Axis]: Trader Corporation, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[23],[56]         (6,000)          
Investment, Identifier [Axis]: Trader Corporation, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[55] (4,000)   (4,000)              
Investment, Identifier [Axis]: Transit Technologies LLC, Software, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         6,035,000          
Investment, Identifier [Axis]: Transportation Insight, LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,677,000 [2],[3],[4]   8,677,000 [2],[3],[4]   10,335,000 [5],[6],[7]          
Investment, Identifier [Axis]: Trident Maritime Systems, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,953,000 [2],[3],[4]   14,953,000 [2],[3],[4]   15,409,000 [6],[7],[12]          
Investment, Identifier [Axis]: Trintech, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,786,000 [3],[4],[22]   6,786,000 [3],[4],[22]   6,790,000 [6],[7],[15]          
Investment, Identifier [Axis]: Trintech, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         140,000          
Investment, Identifier [Axis]: Trintech, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] 143,000   143,000              
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Automotive Parts & Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         18,967,000          
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13],[17]         0          
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14],[16] 0   0              
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Preferred Unit                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13],[17]         0          
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Preferred Unit                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14],[16] 0   0              
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, Class A LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7]         1,323,000          
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         6,739,000          
Investment, Identifier [Axis]: Turbo Buyer, Inc., Finance Companies, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,857,000 [2],[3],[4]   7,857,000 [2],[3],[4]   7,939,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Turnberry Solutions, Inc., Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,887,000 [3],[4],[22]   4,887,000 [3],[4],[22]   4,898,000 [6],[7],[12]          
Investment, Identifier [Axis]: UBC Ledgers Holding AB, Financial Other, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,539,000 [3],[4],[9],[11],[35]   1,539,000 [3],[4],[9],[11],[35]   1,529,000 [6],[7],[10],[23],[36]          
Investment, Identifier [Axis]: UBC Ledgers Holding AB, Financial Other, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 564,000   564,000              
Investment, Identifier [Axis]: UBC Ledgers Holding AB, Financial Other, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[23],[36]         0          
Investment, Identifier [Axis]: UKFast Leaders Limited, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,737,000 [3],[4],[9],[27]   11,737,000 [3],[4],[9],[27]   10,762,000 [6],[7],[10],[28]          
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), Legal Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,324,000 [2],[3],[4],[11]   1,324,000 [2],[3],[4],[11]   9,883,000 [6],[7],[15],[23]          
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), Legal Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 8,655,000   8,655,000              
Investment, Identifier [Axis]: Union Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 995,000 [3],[4],[9],[11],[39]   995,000 [3],[4],[9],[11],[39]   877,000 [6],[7],[10],[23],[28]          
Investment, Identifier [Axis]: United Therapy Holding III GmbH, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,398,000 [3],[4],[9],[11],[18]   1,398,000 [3],[4],[9],[11],[18]   1,312,000 [6],[7],[10],[23],[29]          
Investment, Identifier [Axis]: Unither (Uniholding), Pharma-ceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[19],[23]         2,037,000          
Investment, Identifier [Axis]: Unither (Uniholding), Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[11],[18] 2,078,000   2,078,000              
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 1,607,000   1,607,000              
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 931,000 [2],[3],[4],[9]   931,000 [2],[3],[4],[9]   1,559,000 [6],[7],[10],[19]          
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,445,000 [2],[3],[4],[9]   2,445,000 [2],[3],[4],[9]   3,353,000 [6],[7],[10],[12]          
Investment, Identifier [Axis]: VOYA CLO 2015-2, LTD., Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 14,000 [9],[14],[16]   14,000 [9],[14],[16]   91,000 [10],[13],[17]          
Investment, Identifier [Axis]: VOYA CLO 2016-2, LTD., Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value [10],[13],[17]         943,000          
Investment, Identifier [Axis]: VOYA CLO 2016-2, LTD., Multi-Sector Holdings, Subordinated Structured Notes 1                    
Schedule of Investments [Line Items]                    
Fair Value [9],[14],[16] 1,261,000   1,261,000              
Investment, Identifier [Axis]: Validity, Inc., IT Consulting & Other Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,783,000 [3],[4],[22]   4,783,000 [3],[4],[22]   4,783,000 [6],[7],[15]          
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13],[17]         2,000          
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14],[16] 3,000   3,000              
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13],[17]         3,000          
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14],[16] 2,000   2,000              
Investment, Identifier [Axis]: Victoria Bidco Limited, Industrial Machinery, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[27] 3,784,000   3,784,000              
Investment, Identifier [Axis]: Victoria Bidco Limited, Industrial Machinery, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[10],[28]         3,573,000          
Investment, Identifier [Axis]: Vision Solutions Inc., Business Equipment & Services, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,053,000 [2],[3],[16]   6,053,000 [2],[3],[16]   5,908,000 [6],[12],[17]          
Investment, Identifier [Axis]: VistaJet Pass Through Trust 2021-1B, Airlines, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 3,154,000 [4]   3,154,000 [4]   3,262,000 [7]          
Investment, Identifier [Axis]: Vital Buyer, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,369,000 [2],[3],[4]   7,369,000 [2],[3],[4]   7,526,000 [6],[7],[12]          
Investment, Identifier [Axis]: Vital Buyer, LLC, Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         434,000          
Investment, Identifier [Axis]: Vital Buyer, LLC, Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 296,000   296,000              
Investment, Identifier [Axis]: W2O Holdings, Inc., Healthcare Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,798,000 [2],[4]   5,798,000 [2],[4]   5,785,000 [7],[12]          
Investment, Identifier [Axis]: W2O Holdings, Inc., Healthcare Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 2,720,000   2,720,000              
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, Insurance, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 52,000   52,000              
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, Insurance, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 2,475,000   2,475,000              
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC,Insurance, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         2,403,000          
Investment, Identifier [Axis]: WWEC Holdings III Corp, Capital Goods, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,158,000 [2],[3],[4]   2,158,000 [2],[3],[4]   12,346,000 [6],[7],[12]          
Investment, Identifier [Axis]: WWEC Holdings III Corp, Capital Goods, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 9,922,000   9,922,000              
Investment, Identifier [Axis]: WWEC Holdings III Corp, Capital Goods, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         466,000          
Investment, Identifier [Axis]: WWEC Holdings III Corp, Capital Goods, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] (35,000)   (35,000)              
Investment, Identifier [Axis]: Waccamaw River LLC                    
Schedule of Investments [Line Items]                    
Total contributed capital 30,280,000   30,280,000   30,280,000       $ 25,000,000  
Investment, Identifier [Axis]: Waccamaw River LLC, Investment Funds & Vehicles, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 12,918,000 [4],[9]   12,918,000 [4],[9]   15,470,000 [10],[13]          
Investment, Identifier [Axis]: Waccamaw River LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 12,918,000   12,918,000   15,470,000 $ 20,212,000        
Investment, Identifier [Axis]: Watermill-QMC Midco, Inc., Automotive, Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13],[17]         0          
Investment, Identifier [Axis]: Watermill-QMC Midco, Inc., Automotive, Equity (1.62% Partnership Interest)                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14],[16] 0   0              
Investment, Identifier [Axis]: Wheels Up Experience Inc, Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,847,000 [4]   7,847,000 [4]   9,884,000 [7]          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 735,000 [2],[3],[4]   735,000 [2],[3],[4]   8,345,000 [6],[7],[12]          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 845,000   845,000              
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 8,547,000   8,547,000              
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[13]         804,000          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[14] 852,000   852,000              
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 968,000 [3],[4],[11],[22]   968,000 [3],[4],[11],[22]   67,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: White Bidco Limited, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,742,000 [2],[3],[4],[9],[11]   1,742,000 [2],[3],[4],[9],[11]   1,687,000 [6],[7],[10],[12],[23]          
Investment, Identifier [Axis]: Wok Holdings Inc., Retail, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 46,000 [2],[3],[16]   46,000 [2],[3],[16]   47,000 [6],[12],[17]          
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,035,000 [4],[14]   1,035,000 [4],[14]   1,012,000 [7],[13]          
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,113,000 [2],[3],[4]   6,113,000 [2],[3],[4]   4,946,000 [6],[7],[12]          
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4] 401,000   401,000              
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         1,378,000          
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 1,155,000   1,155,000              
Investment, Identifier [Axis]: World 50, Inc., Professional Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 18,625,000   18,625,000              
Investment, Identifier [Axis]: World 50, Inc., Professional Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         2,414,000          
Investment, Identifier [Axis]: World 50, Inc., Professional Services, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12]         8,760,000          
Investment, Identifier [Axis]: World 50, Inc., Professional Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 130,000   130,000              
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[10],[13]         582,000          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[9],[14] 613,000   613,000              
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,180,000 [3],[4],[9],[11],[27]   9,180,000 [3],[4],[9],[11],[27]   6,448,000 [6],[7],[10],[23],[28]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[18] 304,000   304,000              
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,923,000 [4],[9]   3,923,000 [4],[9]   3,241,000 [7],[10]          
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,060,000 [2],[3],[4]   9,060,000 [2],[3],[4]   6,271,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7]         172,000          
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 188,000   188,000              
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (6,000)          
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[11] 459,000   459,000              
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Services: Business, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,654,000 [3],[4],[9],[27]   4,654,000 [3],[4],[9],[27]   5,718,000 [6],[7],[10],[23],[28]          
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Services: Business, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[9],[27] 591,000   591,000              
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,467,000 [3],[4],[22]   3,467,000 [3],[4],[22]   3,473,000 [6],[7],[15]          
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[15],[23]         $ 0          
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11],[22] $ 0   $ 0              
[1]
(d)    The fair value of the investment was determined using significant unobservable inputs.
[2] The interest rate on these loans is subject to 3 Month SOFR, which as of September 30, 2024 was 4.59211%.
[3] Debt investment includes interest rate floor feature.
[4] The fair value of the investment was determined using significant unobservable inputs.
[5] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2023 was 5.15772%.
[6] Debt investment includes interest rate floor feature.
[7] The fair value of the investment was determined using significant unobservable inputs.
[8] PIK non-accrual investment.
[9] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 28.8% of total investments at fair value as of September 30, 2024. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. If at any time qualifying assets do not represent at least 70% of the Company’s total assets, the Company will be precluded from acquiring any additional non-qualifying asset until such time as it complies with the requirements of Section 55(a).
[10] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 28.8% of total investments at fair value as of December 31, 2023. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. If at any time qualifying assets do not represent at least 70% of the Company’s total assets, the Company will be precluded from acquiring any additional non-qualifying asset until such time as it complies with the requirements of Section 55(a).
[11] Position or portion thereof is an unfunded loan or equity commitment.
[12] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2023 was 5.33140%.
[13] Investment is non-income producing.
[14] Investment is non-income producing.
[15] The interest rate on these loans is subject to 1 Month SOFR, which as of December 31, 2023 was 5.35472%.
[16] Investment was purchased as part of the Sierra Merger and is part of the Sierra Reference Portfolio for purposes of the Sierra Credit Support Agreement.
[17] Investment was purchased as part of the Sierra Merger and is part of the Sierra Reference Portfolio for purposes of the Sierra Credit Support Agreement.
[18] The interest rate on these loans is subject to 3 Month EURIBOR, which as of September 30, 2024 was 3.27900%.
[19] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2023 was 3.90900%.
[20] The interest rate on these loans is subject to 6 Month BBSY, which as of September 30, 2024 was 4.62210%.
[21] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2023 was 4.31000%.
[22] The interest rate on these loans is subject to 1 Month SOFR, which as of September 30, 2024 was 4.84570%.
[23] Position or portion thereof is an unfunded loan or equity commitment.
[24] The interest rate on these loans is subject to 6 Month SOFR, which as of September 30, 2024 was 4.25387%.
[25] The interest rate on these loans is subject to 6 Month EURIBOR, which as of September 30, 2024 was 3.10500%.
[26] Non-accrual investment.
[27] The interest rate on these loans is subject to 3 Month SONIA, which as of September 30, 2024 was 4.81560%.
[28] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2023 was 5.20530%.
[29] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2023 was 3.86100%.
[30] The interest rate on these loans is subject to 6 Month SONIA, which as of September 30, 2024 was 4.64880%.
[31] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2023 was 5.13220%.
[32] The interest rate on these loans is subject to 3 Month BBSY, which as of September 30, 2024 was 4.43410%.
[33] The interest rate on these loans is subject to 6 Month BBSY, which as of December 31, 2023 was 4.44500%.
[34] The interest rate on these loans is subject to 1 Month EURIBOR, which as of September 30, 2024 was 3.35300%.
[35] The interest rate on these loans is subject to 3 Month STIBOR, which as of September 30, 2024 was 3.08400%.
[36] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2023 was 4.05200%.
[37] Non-accrual investment.
[38]
(d)    The fair value of the investment was determined using significant unobservable inputs.
[39] The interest rate on these loans is subject to 1 Month SONIA, which as of September 30, 2024 was 4.96030%.
[40] The interest rate on these loans is subject to 1 Month SONIA, which as of December 31, 2023 was 5.19920%.
[41] The interest rate on these loans is subject to 3 Month CORRA, which as of September 30, 2024 was 3.91955%.
[42] The interest rate on these loans is subject to 3 Month CDOR, which as of December 31, 2023 was 5.44750%.
[43] The interest rate on these loans is subject to 1 Month EURIBOR, which as of December 31, 2023 was 3.84500%.
[44] The interest rate on these loans is subject to 3 Month BKBM, which as of September 30, 2024 was 5.05000%
[45] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2023 was 4.35750%.
[46] The interest rate on these loans is subject to 3 Month BKBM, which as of December 31, 2023 was 5.63000%.
[47] The interest rate on these loans is subject to 3 Month SARON, which as of September 30, 2024 was 1.19930%
[48] The interest rate on these loans is subject to 6 Month SARON, which as of December 31, 2023 was 1.69524%.
[49] Investment was purchased as part of the MVC Acquisition and is part of the MVC Reference Portfolio for purposes of the MVC Credit Support Agreement.
[50] Investment was purchased as part of the MVC Acquisition and is part of the MVC Reference Portfolio for purposes of the MVC Credit Support Agreement.
[51] The interest rate on these loans is subject to 1 Month NIBOR, which as of September 30, 2024 was 4.64000%.
[52] The interest rate on these loans is subject to 1 Month NIBOR, which as of December 31, 2023 was 4.59000%.
[53] The interest rate on these loans is subject to 1 Month BBSY, which as of September 30, 2024 was 4.30210%.
[54] The interest rate on these loans is subject to 6 Month SARON, which as of September 30, 2024 was 1.31390%.
[55] The interest rate on these loans is subject to 1 Month CORRA, which as of September 30, 2024 was 4.16088%.
[56] The interest rate on these loans is subject to 1 Month CDOR, which as of December 31, 2023 was 5.45500%.