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INVESTMENTS - Waccamaw River LLC (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
USD ($)
loan
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
loan
Jun. 30, 2023
USD ($)
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 $ 11,734,000 $ 10,250,000 $ 20,210,000 $ 18,124,000            
Fair Value 2,395,660,000   2,395,660,000   $ 2,488,715,000          
Waccamaw River, LLC                    
Schedule of Investments [Line Items]                    
Total dividend income 2,600,000 700,000 2,600,000 1,500,000            
Distributions of realized gains by investment companies $ 300,000   $ 300,000              
Investment owned, outstanding loans | loan 9,819   9,819   21,435          
Average loan amount $ 9,064   $ 9,064   $ 10,338          
Investment company, weighted average interest rate     11.80%   12.70%          
Investment company, remaining average life to maturity     3 years 2 months   40 months          
Waccamaw River, LLC | Consumer Loan                    
Schedule of Investments [Line Items]                    
Fair Value 65,600,000   $ 65,600,000   $ 182,300,000          
Waccamaw River, LLC | Cash and Cash Equivalents                    
Schedule of Investments [Line Items]                    
Fair Value 7,200,000   7,200,000   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 14,900,000 $ 3,700,000 14,900,000 $ 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 12,300,000   12,300,000   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] 7,086,000   7,086,000              
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 9,763,000 [4],[8]   9,763,000 [4],[8]   11,688,000 [7],[9]          
Investment, Identifier [Axis]: AD Bidco, Inc., Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] 9,921,000   9,921,000              
Investment, Identifier [Axis]: AD Bidco, Inc., Technology, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] (79,000)   (79,000)              
Investment, Identifier [Axis]: AD Bidco, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] (29,000)   (29,000)              
Investment, Identifier [Axis]: ADB Safegate, Aerospace & Defense, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,070,000 [3],[4],[8],[11]   6,070,000 [3],[4],[8],[11]   5,392,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Transportation Services, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 551,000 [4],[13]   551,000 [4],[13]   537,000 [7],[14]          
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 [3],[4],[15]   6,460,000 [3],[4],[15]   6,402,000 [6],[7],[16]          
Investment, Identifier [Axis]: AMMC CLO 22, Limited Series 2018-22A, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value [8],[17] 2,640,000   2,640,000              
Investment, Identifier [Axis]: AMMC CLO 23, Ltd. Series 2020-23A, Multi-Sector Holdings, Subordinated Structured Notes 1                    
Schedule of Investments [Line Items]                    
Fair Value [9],[14],[18]         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 1,421,000 [8],[17]   1,421,000 [8],[17]   1,476,000 [9],[18]          
Investment, Identifier [Axis]: APC1 Holding, Diversified Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,441,000 [3],[4],[8],[19]   2,441,000 [3],[4],[8],[19]   2,505,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: APOG Bidco Pty Ltd, Healthcare, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,062,000 [3],[4],[8],[21]   2,062,000 [3],[4],[8],[21]   2,086,000 [6],[7],[9],[22]          
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 [3],[4],[11]   20,000,000 [3],[4],[11]   19,938,000 [6],[7],[12]          
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 785,000 [4]   785,000 [4]   703,000 [7]          
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,088,000 [3],[4],[15]   8,088,000 [3],[4],[15]   9,035,000 [6],[7],[16]          
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[15]   0 [3],[4],[10],[15]   (9,000) [6],[7],[16],[23]          
Investment, Identifier [Axis]: ATL II MRO Holdings Inc, Transportation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,209,000 [3],[4],[11]   8,209,000 [3],[4],[11]   8,250,000 [6],[7],[12]          
Investment, Identifier [Axis]: ATL II MRO Holdings Inc, Transportation, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (17,000) [3],[4],[10],[11]   (17,000) [3],[4],[10],[11]   0 [6],[7],[12],[23]          
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,944,000   6,944,000              
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[11] 10,000   10,000              
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[11] 1,000   1,000              
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 6,098,000 [4],[13]   6,098,000 [4],[13]   5,858,000 [7],[14]          
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class B Convertible Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value 2,111,000 [4],[13]   2,111,000 [4],[13]   1,950,000 [7],[14]          
Investment, Identifier [Axis]: Acclime Holdings HK Limited, Business services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,438,000 [2],[3],[4],[8]   2,438,000 [2],[3],[4],[8]   2,461,000 [5],[6],[7],[9]          
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 319,000 [4],[13]   319,000 [4],[13]   512,000 [7],[14]          
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,817,000 [3],[4],[11]   11,817,000 [3],[4],[11]   11,768,000 [6],[7],[12]          
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,795,000 [3],[4],[10],[11]   1,795,000 [3],[4],[10],[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 6,981,000 [3],[4],[8],[24]   6,981,000 [3],[4],[8],[24]   7,226,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Adhefin International, Industrial Other, First Lien Senior Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,770,000 [3],[4],[8],[10],[19]   1,770,000 [3],[4],[8],[10],[19]   1,778,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Adhefin International, Industrial Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 336,000 [3],[4],[8],[19]   336,000 [3],[4],[8],[19]   300,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A1 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 679,000 [4],[13]   679,000 [4],[13]   697,000 [7],[14]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 175,000 [4],[13]   175,000 [4],[13]   180,000 [7],[14]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class B1 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13]   0 [4],[13]   0 [7],[14]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class B2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13]   0 [4],[13]   0 [7],[14]          
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 3,014,000   3,014,000   3,587,000          
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                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 7,619,000   7,619,000              
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Aerospace & Defense, First Lien Senior Secured Term Loan, 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,286,000 [3],[4],[11]   1,286,000 [3],[4],[11]   1,296,000 [6],[7],[12]          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc,Diversified Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,296,000 [2],[3],[4],[10]   3,296,000 [2],[3],[4],[10]   3,226,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc,Diversified Manufacturing,Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 203,000 [2],[3],[4],[10]   203,000 [2],[3],[4],[10]   (12,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: AlliA Insurance Brokers NV, Insurance, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,837,000 [3],[4],[8],[10],[19]   3,837,000 [3],[4],[8],[10],[19]   3,443,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Alpine SG, LLC, High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 22,792,000 [3],[4],[15],[17]   22,792,000 [3],[4],[15],[17]   22,792,000 [6],[7],[12],[18]          
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Class B Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,178,000 [4],[8],[13]   1,178,000 [4],[8],[13]   1,188,000 [7],[9],[14]          
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Subordinated Loan Notes                    
Schedule of Investments [Line Items]                    
Fair Value 5,206,000 [4],[8]   5,206,000 [4],[8]   4,824,000 [7],[9]          
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Warrant                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[14]         529,000          
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[13] 750,000   750,000              
Investment, Identifier [Axis]: Americo Chemicals Products, LLC, Chemicals, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 100,000 [4],[13]   100,000 [4],[13]   89,000 [7],[14]          
Investment, Identifier [Axis]: Americo Chemicals Products, LLC, Chemicals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,773,000 [3],[4],[15]   1,773,000 [3],[4],[15]   1,920,000 [6],[7],[16]          
Investment, Identifier [Axis]: Americo Chemicals Products, LLC, Chemicals, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[15]   0 [3],[4],[10],[15]   (4,000) [6],[7],[16],[23]          
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 3,092,000 [3],[4],[8],[19]   3,092,000 [3],[4],[8],[19]   3,173,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 933,000 [3],[4],[8],[19]   933,000 [3],[4],[8],[19]   958,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,644,000 [3],[4],[8],[19]   1,644,000 [3],[4],[8],[19]   1,678,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 1,006,000 [3],[4],[8],[11]   1,006,000 [3],[4],[8],[11]   1,002,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: Anju Software, Inc. Application Software, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[25]         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]: Anju Software, Inc., Application Software, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[26] 892,000   892,000              
Investment, Identifier [Axis]: Anju Software, Inc., Application Software, Super Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10] 889,000   889,000              
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,842,000 [3],[4],[8],[27]   1,842,000 [3],[4],[8],[27]   1,858,000 [6],[7],[9],[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],[8],[27] 1,388,000   1,388,000              
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, First Lien Senior Secured Term Loan1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[9],[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 296,000 [4],[8]   296,000 [4],[8]   285,000 [7],[9]          
Investment, Identifier [Axis]: Apidos CLO XXIV, Series 2016-24A, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 4,854,000 [8],[17]   4,854,000 [8],[17]   5,885,000 [9],[18]          
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[14]         0          
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[13] 0   0              
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,041,000 [3],[4],[8],[24]   2,041,000 [3],[4],[8],[24]   1,982,000 [6],[7],[9],[29]          
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[14]         4,000          
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[13] 10,000   10,000              
Investment, Identifier [Axis]: Apus Bidco Limited, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,641,000 [3],[4],[8],[30]   3,641,000 [3],[4],[8],[30]   3,621,000 [6],[7],[9],[28]          
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,021,000 [3],[4],[8],[10],[30]   6,021,000 [3],[4],[8],[10],[30]   5,839,000 [6],[7],[9],[23],[31]          
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,896,000 [3],[4],[8],[30]   1,896,000 [3],[4],[8],[30]   1,706,000 [6],[7],[9],[31]          
Investment, Identifier [Axis]: Arc Education, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,698,000 [3],[4],[8],[10],[19]   3,698,000 [3],[4],[8],[10],[19]   3,791,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Arch Global Precision LLC, Industrial Machinery, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,788,000 [3],[4],[11]   8,788,000 [3],[4],[11]   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 6,089,000 [3],[4],[8],[19]   6,089,000 [3],[4],[8],[19]   6,304,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[8],[13]   0 [4],[8],[13]   0 [7],[9],[14]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Equity Loan Notes                    
Schedule of Investments [Line Items]                    
Fair Value 44,000 [4],[8]   44,000 [4],[8]   42,000 [7],[9]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,551,000 [3],[4],[8],[19]   1,551,000 [3],[4],[8],[19]   125,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 301,000 [3],[4],[8],[19]   301,000 [3],[4],[8],[19]   307,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 128,000 [3],[4],[8],[11]   128,000 [3],[4],[8],[11]   1,408,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 4                    
Schedule of Investments [Line Items]                    
Fair Value 1,624,000 [3],[4],[8],[10],[27]   1,624,000 [3],[4],[8],[10],[27]   1,632,000 [6],[7],[9],[28]          
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],[9],[23],[28]         (28,000)          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 44,000 [4],[8]   44,000 [4],[8]   42,000 [7],[9]          
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Second Lien Term Loan Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 769,000 [4],[8]   769,000 [4],[8]   734,000 [7],[9]          
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 2,538,000 [2],[3],[4]   2,538,000 [2],[3],[4]   3,790,000 [6],[7],[12]          
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 3,163,000 [2],[3],[4]   3,163,000 [2],[3],[4]   4,709,000 [6],[7],[12]          
Investment, Identifier [Axis]: Astra Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[9],[23],[28]         2,380,000          
Investment, Identifier [Axis]: Astra Bidco Limited, Healthcare, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[10],[27] 2,358,000   2,358,000              
Investment, Identifier [Axis]: Astra Bidco Limited, Healthcare, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[19] 309,000   309,000              
Investment, Identifier [Axis]: Auxi International, Commercial Finance, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,401,000 [3],[4],[8],[24]   1,401,000 [3],[4],[8],[24]   1,427,000 [6],[7],[9],[29]          
Investment, Identifier [Axis]: Auxi International, Commercial Finance, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 791,000 [3],[4],[8],[30]   791,000 [3],[4],[8],[30]   788,000 [6],[7],[9],[31]          
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,180,000 [3],[4],[8],[10],[32]   2,180,000 [3],[4],[8],[10],[32]   2,190,000 [6],[7],[9],[23],[33]          
Investment, Identifier [Axis]: Aviation Technical Services, Inc., Aerospace & Defense, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 28,102,000 [3],[4],[15],[17]   28,102,000 [3],[4],[15],[17]   29,162,000 [6],[7],[16],[18]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[14]         288,000          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 273,000   273,000              
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,808,000 [3],[4],[10],[15]   4,808,000 [3],[4],[10],[15]   4,809,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[15]   0 [3],[4],[10],[15]   (3,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,693,000 [4]   1,693,000 [4]   1,529,000 [7]          
Investment, Identifier [Axis]: BNI Global, LLC, Other Industrial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[34] 9,615,000   9,615,000              
Investment, Identifier [Axis]: BPG Holdings IV Corp, Capital Goods, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,011,000 [3],[4],[11]   13,011,000 [3],[4],[11]   13,401,000 [6],[7],[12]          
Investment, Identifier [Axis]: BVI Medical, Inc., Healthcare, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,734,000 [3],[4],[19]   9,734,000 [3],[4],[19]   9,541,000 [6],[7],[20]          
Investment, Identifier [Axis]: Bariacum S.A, Consumer Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,209,000 [3],[4],[8],[24]   3,209,000 [3],[4],[8],[24]   3,314,000 [6],[7],[9],[29]          
Investment, Identifier [Axis]: Benify (Bennevis AB), High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 891,000 [3],[4],[8],[35]   891,000 [3],[4],[8],[35]   1,096,000 [6],[7],[9],[36]          
Investment, Identifier [Axis]: Beyond Risk Management, Inc., Other Financial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,150,000 [3],[4],[10],[11]   5,150,000 [3],[4],[10],[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 7,397,000 [3],[4],[8],[24]   7,397,000 [3],[4],[8],[24]   7,672,000 [6],[7],[9],[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],[9]         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],[9],[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],[9],[28]         801,000          
Investment, Identifier [Axis]: Biolam Group, Consumer Non-cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,943,000 [3],[4],[8],[10],[24]   1,943,000 [3],[4],[8],[10],[24]   2,266,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [37] 7,736,000   7,736,000   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 [37] 1,889,000   1,889,000   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],[17],[26] 1,889,000   1,889,000              
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 7,736,000 [3],[4],[15],[17]   7,736,000 [3],[4],[15],[17]   7,166,000 [6],[7],[16],[18]          
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],[18],[25]         4,869,000          
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[14],[18]         0          
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13],[17] 0   0              
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [37] 0   0   0 0        
Investment, Identifier [Axis]: Bounteous, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,085,000 [3],[4],[11]   4,085,000 [3],[4],[11]   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 27,953,000   27,953,000   28,802,000          
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Environmental Industries, Preferred Stock- Series A                    
Schedule of Investments [Line Items]                    
Fair Value 14,706,000 [4]   14,706,000 [4]   15,003,000 [7]          
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,681,000 [3],[4],[11]   4,681,000 [3],[4],[11]   4,540,000 [6],[7],[12]          
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, LLC units                    
Schedule of Investments [Line Items]                    
Fair Value 1,141,000 [4]   1,141,000 [4]   930,000 [7],[14]          
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,063,000 [3],[4],[10],[11]   1,063,000 [3],[4],[10],[11]   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 2,156,000 [3],[4],[8],[10],[19]   2,156,000 [3],[4],[8],[10],[19]   2,250,000 [6],[7],[9],[20],[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 565,000   565,000              
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, Commercial Services & Supplies, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,494,000 [3],[4],[8],[30]   14,494,000 [3],[4],[8],[30]   14,403,000 [6],[7],[9],[31]          
Investment, Identifier [Axis]: Brook & Whittle Holding Corp., Containers, Packaging & Glass, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,544,000 [3],[11],[17]   2,544,000 [3],[11],[17]   2,596,000 [6],[7],[12],[18]          
Investment, Identifier [Axis]: Brown Machine Group Holdings, LLC, Industrial Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,929,000 [3],[4],[15]   5,929,000 [3],[4],[15]   5,954,000 [6],[7],[16]          
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Auto Parts & Equipment, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 433,000 [4],[13]   433,000 [4],[13]   462,000 [7],[14]          
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],[15]   4,545,000 [3],[4],[15]   4,368,000 [6],[7],[16]          
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 11,056,000 [3],[4],[11]   11,056,000 [3],[4],[11]   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 1,333,000 [3],[4],[11]   1,333,000 [3],[4],[11]   1,275,000 [6],[7],[12]          
Investment, Identifier [Axis]: CAi Software, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (44,000) [3],[4],[10],[11]   (44,000) [3],[4],[10],[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],[10] 3,710,000   3,710,000              
Investment, Identifier [Axis]: CCFF Buyer, LLC, Food & Beverage, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 233,000   233,000              
Investment, Identifier [Axis]: CCFF Buyer, LLC, Food & Beverage, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4],[10] (19,000)   (19,000)              
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 12,993,000 [3],[4],[11]   12,993,000 [3],[4],[11]   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 1,364,000 [3],[4],[11]   1,364,000 [3],[4],[11]   1,344,000 [6],[7],[12]          
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,378,000 [4],[13]   1,378,000 [4],[13]   1,190,000 [7],[14]          
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[11]   0 [3],[4],[10],[11]   (33,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., Internet & Direct Marketing, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 13,131,000 [3],[4],[11]   13,131,000 [3],[4],[11]   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 [6],[7],[16]         3,742,000          
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 3,551,000   3,551,000              
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 578,000 [3],[4],[11]   578,000 [3],[4],[11]   609,000 [6],[7],[16]          
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, Incremental Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 0   0              
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13]   0 [4],[13]   59,000 [7],[14]          
Investment, Identifier [Axis]: CSL DualCom, Tele-communications, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,034,000 [3],[4],[8],[10],[38]   2,034,000 [3],[4],[8],[10],[38]   2,052,000 [6],[7],[9],[23],[39]          
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[16],[18]         4,684,000          
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, 2024 LIFO Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 3,896,000   3,896,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, First Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 737,000   737,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, Second Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 555,000   555,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, 2024 First Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 1,920,000   1,920,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 579,000   579,000              
Investment, Identifier [Axis]: CW Group Holdings, LLC, High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,746,000 [3],[4],[11]   2,746,000 [3],[4],[11]   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 300,000 [4]   300,000 [4]   289,000 [7],[14]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class A Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[14]         0          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class A Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[13] 0   0              
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class C - Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[14]         0          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class C - Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[13] 0   0              
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class X Equity                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[13] 0   0              
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 451,000 [3],[4],[8],[26],[40]   451,000 [3],[4],[8],[26],[40]   1,322,000 [6],[7],[9],[41]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Super Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[10] 28,000   28,000              
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,271,000 [3],[4],[8],[11]   4,271,000 [3],[4],[8],[11]   4,240,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 948,000 [4],[8],[13]   948,000 [4],[8],[13]   982,000 [7],[9],[14]          
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, LLC Units - Class X Equity                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[14]         0          
Investment, Identifier [Axis]: Cascade Residential Services LLC, Electric, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 61,000 [3],[4],[10],[11]   61,000 [3],[4],[10],[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 3,187,000 [3],[4],[10],[11]   3,187,000 [3],[4],[10],[11]   2,567,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Catawba River Limited, Finance Companies, Structured - Junior Note                    
Schedule of Investments [Line Items]                    
Fair Value 3,353,000 [4],[8]   3,353,000 [4],[8]   943,000 [7],[9],[23]          
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 [4],[11]   6,214,000 [4],[11]   6,214,000 [7],[12]          
Investment, Identifier [Axis]: Celebration Bidco, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [1] 13,773,000   13,773,000   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],[8],[19] 751,000   751,000              
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 2,312,000 [3],[4],[8],[19]   2,312,000 [3],[4],[8],[19]   3,144,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Ceres Pharma NV, Pharma-ceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,236,000 [3],[4],[8],[24]   3,236,000 [3],[4],[8],[24]   3,307,000 [6],[7],[9],[29]          
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 13,773,000 [4],[13]   13,773,000 [4],[13]   12,177,000 [7],[14]          
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,243,000 [4]   7,243,000 [4]   6,868,000 [7]          
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure, Subordinated Term Loan2                    
Schedule of Investments [Line Items]                    
Fair Value 15,710,000 [4]   15,710,000 [4]   15,649,000 [7]          
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [1] 16,086,000 [4],[13]   16,086,000 [4],[13]   12,160,000 [7],[14] 0        
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [1] 15,710,000   15,710,000   15,649,000 0        
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [1] 7,243,000   7,243,000   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 [3],[4],[8],[11]   1,303,000 [3],[4],[8],[11]   1,294,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: Coherus Biosciences, Inc., Biotechnology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 3,871,000   3,871,000              
Investment, Identifier [Axis]: Coherus Biosciences, Inc., Biotechnology, Royalty Rights                    
Schedule of Investments [Line Items]                    
Fair Value [4] 3,871,000   3,871,000              
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, Class B Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 178,000 [4],[13]   178,000 [4],[13]   176,000 [7],[14]          
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],[16]         13,345,000          
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 148,000 [4],[13]   148,000 [4],[13]   142,000 [7],[14]          
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 623,000 [4]   623,000 [4]   622,000 [7]          
Investment, Identifier [Axis]: Comply365, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,562,000 [3],[4],[11]   5,562,000 [3],[4],[11]   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 13,084,000 [3],[4],[11]   13,084,000 [3],[4],[11]   12,997,000 [6],[7],[12]          
Investment, Identifier [Axis]: Comply365, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (7,000) [3],[4],[10],[11]   (7,000) [3],[4],[10],[11]   (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 4,990,000 [3],[4],[8],[19]   4,990,000 [3],[4],[8],[19]   5,103,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [9],[14]         133,000          
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, Equipment Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[25]         22,976,000          
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 209,000 [4],[8],[13]   209,000 [4],[8],[13]   211,000 [7],[9],[14]          
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class B Units                    
Schedule of Investments [Line Items]                    
Fair Value 382,000 [4],[8],[13]   382,000 [4],[8],[13]   505,000 [7],[9],[14]          
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,615,000 [3],[4],[8],[10],[19]   4,615,000 [3],[4],[8],[10],[19]   4,659,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,888,000 [3],[4],[10],[15]   6,888,000 [3],[4],[10],[15]   5,944,000 [6],[7],[16],[23]          
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (6,000) [3],[4],[10],[15]   (6,000) [3],[4],[10],[15]   90,000 [6],[7],[16],[23]          
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] 0   0              
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,876,000 [3],[4],[11]   1,876,000 [3],[4],[11]   1,873,000 [6],[7],[12]          
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 103,000 [4],[13]   103,000 [4],[13]   96,000 [7],[14]          
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (7,000)          
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],[8],[27] 1,264,000   1,264,000              
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 29,000   29,000              
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 37,000 [4],[13]   37,000 [4],[13]   41,000 [7],[14]          
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,587,000 [3],[4],[15]   1,587,000 [3],[4],[15]   1,638,000 [6],[7],[16]          
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 340,000 [3],[4],[10],[15]   340,000 [3],[4],[10],[15]   (9,000) [6],[7],[16],[23]          
Investment, Identifier [Axis]: Distinct Holdings, Inc., Systems Software, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,540,000 [3],[4],[11]   6,540,000 [3],[4],[11]   6,416,000 [6],[7],[12]          
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC, Containers, Packaging & Glass, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 277,000   277,000              
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC, Containers, Packaging & Glass, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4] 709,000   709,000              
Investment, Identifier [Axis]: Dragon Bidco, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,679,000 [3],[4],[8],[24]   2,679,000 [3],[4],[8],[24]   2,734,000 [6],[7],[9],[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 2,279,000 [3],[4],[8],[19]   2,279,000 [3],[4],[8],[19]   2,349,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Dryden 43 Senior Loan Fund, Series 2016-43A, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 1,451,000 [8],[17]   1,451,000 [8],[17]   1,647,000 [9],[18]          
Investment, Identifier [Axis]: Dryden 49 Senior Loan Fund, Series 2017-49A, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 1,149,000 [8],[13],[17]   1,149,000 [8],[13],[17]   3,319,000 [9],[14],[18]          
Investment, Identifier [Axis]: Dune Group, Health Care Equipment, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 103,000 [3],[4],[8],[10],[19]   103,000 [3],[4],[8],[10],[19]   115,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Dune Group, Health Care Equipment, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,380,000 [3],[4],[8],[11]   1,380,000 [3],[4],[8],[11]   1,401,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: Dunlipharder B.V., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 995,000 [3],[4],[8],[15]   995,000 [3],[4],[8],[15]   993,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: Dwyer Instruments, Inc., Electric, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,702,000 [3],[4],[11]   14,702,000 [3],[4],[11]   14,479,000 [6],[7],[12]          
Investment, Identifier [Axis]: EFC International, Automotive, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 373,000 [4],[13]   373,000 [4],[13]   301,000 [7],[14]          
Investment, Identifier [Axis]: EFC International, Automotive, Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 778,000 [4]   778,000 [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 11,789,000 [3],[4],[11]   11,789,000 [3],[4],[11]   11,155,000 [6],[7],[12]          
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Diversified Manufacturing, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 80,000 [3],[4],[10],[11]   80,000 [3],[4],[10],[11]   2,233,000 [6],[7],[12],[23]          
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 379,000 [4],[13]   379,000 [4],[13]   491,000 [7],[14]          
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Air Transportation, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,308,000 [3],[4],[11]   9,308,000 [3],[4],[11]   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 8,400,000   8,400,000   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 137,749,000 [4]   137,749,000 [4]   145,799,000 [7]          
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 8,364,000 [4],[10],[15]   8,364,000 [4],[10],[15]   5,545,000 [7],[16],[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] 137,749,000   137,749,000   145,799,000 135,066,000        
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [1] 8,364,000   8,364,000   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],[10],[15] 10,440,000   10,440,000              
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 &Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 4,246,000   4,246,000              
Investment, Identifier [Axis]: Entact Environmental Services, Inc., Environmental Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,750,000 [3],[4],[11]   6,750,000 [3],[4],[11]   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],[8],[19],[26] 953,000   953,000              
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 (1,025,000) [3],[4],[8],[10],[19],[26]   (1,025,000) [3],[4],[8],[10],[19],[26]   1,047,000 [6],[7],[9],[20],[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 490,000 [3],[4],[8],[11],[26]   490,000 [3],[4],[8],[11],[26]   700,000 [6],[7],[9],[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 1,454,000 [3],[4],[8],[26],[27]   1,454,000 [3],[4],[8],[26],[27]   2,096,000 [6],[7],[9],[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],[8],[26]   0 [4],[8],[26]   543,000 [7],[9]          
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,537,000 [3],[4],[8],[10],[21]   1,537,000 [3],[4],[8],[10],[21]   1,535,000 [6],[7],[9],[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],[9],[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 6,306,000 [3],[4],[11]   6,306,000 [3],[4],[11]   6,324,000 [6],[7],[12]          
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Consumer Cyclical, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 137,000 [3],[4],[10],[11]   137,000 [3],[4],[10],[11]   138,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: F24 (Stairway BidCo Gmbh), Software Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,909,000 [3],[4],[8],[19]   1,909,000 [3],[4],[8],[19]   1,933,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,765,000 [3],[4],[11]   4,765,000 [3],[4],[11]   4,768,000 [6],[7],[12]          
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, LP Interest                    
Schedule of Investments [Line Items]                    
Fair Value 15,000 [4],[13]   15,000 [4],[13]   16,000 [7],[14]          
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 68,000 [4],[13]   68,000 [4],[13]   72,000 [7],[14]          
Investment, Identifier [Axis]: Faraday, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,595,000 [3],[4],[8],[10],[19]   1,595,000 [3],[4],[8],[10],[19]   1,632,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Ferrellgas L.P., Oil & Gas Equipment & Services, Opco Preferred Units                    
Schedule of Investments [Line Items]                    
Fair Value 2,742,000 [4]   2,742,000 [4]   2,670,000 [7]          
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings Inc., Business Equipment & Services, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 5,705,000 [4]   5,705,000 [4]   5,266,000 [7]          
Investment, Identifier [Axis]: Finaxy Holding, Banking, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,959,000 [4],[8]   1,959,000 [4],[8]   2,009,000 [7],[9]          
Investment, Identifier [Axis]: Finaxy Holding,Banking,First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,327,000 [3],[4],[8],[19]   4,327,000 [3],[4],[8],[19]   4,431,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Fineline Technologies, Inc, Consumer Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,263,000 [3],[4],[11]   1,263,000 [3],[4],[11]   1,275,000 [6],[7],[12]          
Investment, Identifier [Axis]: Finexvet, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[9],[23],[29]         4,230,000          
Investment, Identifier [Axis]: Finexvet, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[24] 4,733,000   4,733,000              
Investment, Identifier [Axis]: FitzMark Buyer, LLC, Cargo & Transportation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,085,000 [3],[4],[15]   4,085,000 [3],[4],[15]   4,073,000 [6],[7],[16]          
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 502,000 [4],[13]   502,000 [4],[13]   855,000 [7],[14]          
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,364,000 [3],[4],[11]   12,364,000 [3],[4],[11]   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 14,661,000   14,661,000   13,187,000          
Investment, Identifier [Axis]: Flywheel Re Segregated Portfolio 2022-4, Investment Funds, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 3,535,000 [4],[8],[13]   3,535,000 [4],[8],[13]   3,196,000 [7],[9],[14]          
Investment, Identifier [Axis]: Footco 40 Limited, Media & Entertainment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 221,000 [3],[4],[8],[10],[27]   221,000 [3],[4],[8],[10],[27]   1,808,000 [6],[7],[9],[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],[8],[10],[27] 1,572,000   1,572,000              
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, Class A LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 149,000   149,000              
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, Class B LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 33,000   33,000              
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] (11,000)   (11,000)              
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 1,551,000   1,551,000              
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] (7,000)   (7,000)              
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Other Financial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,525,000 [3],[4],[10],[11]   8,525,000 [3],[4],[10],[11]   2,480,000 [6],[7],[12]          
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Other Financial, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] (11,000)   (11,000)              
Investment, Identifier [Axis]: FragilePak LLC, Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,416,000 [3],[4],[11]   4,416,000 [3],[4],[11]   4,384,000 [6],[7],[12]          
Investment, Identifier [Axis]: FragilePak LLC, Transportation Services, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 575,000 [4],[13]   575,000 [4],[13]   632,000 [7],[14]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,610,000 [3],[4],[11]   10,610,000 [3],[4],[11]   10,573,000 [6],[7],[12]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,338,000 [4],[13]   1,338,000 [4],[13]   880,000 [7],[14]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[11]   0 [3],[4],[10],[11]   (15,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[13] 0   0              
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[14]         0          
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[10],[26],[34] 132,000   132,000              
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 212,000 [3],[4],[8],[10],[34]   212,000 [3],[4],[8],[10],[34]   265,000 [6],[7],[9],[42]          
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[23]         124,000          
Investment, Identifier [Axis]: Global Academic Group Limited, Industrial Other, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,437,000 [3],[4],[8],[32]   2,437,000 [3],[4],[8],[32]   2,478,000 [6],[7],[9],[43]          
Investment, Identifier [Axis]: Global Academic Group Limited, Industrial Other, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 4,157,000 [3],[4],[8],[10],[44]   4,157,000 [3],[4],[8],[10],[44]   4,295,000 [6],[7],[9],[23],[45]          
Investment, Identifier [Axis]: Gojo Industries, Inc. ,Industrial Other,First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,737,000 [3],[4],[11]   12,737,000 [3],[4],[11]   12,359,000 [6],[7],[12]          
Investment, Identifier [Axis]: Graphpad Software, LLC, Internet Software & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] 9,244,000   9,244,000              
Investment, Identifier [Axis]: Graphpad Software, LLC, Internet Software & Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[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 936,000 [3],[4],[8],[10],[19]   936,000 [3],[4],[8],[10],[19]   894,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Groupe Guemas,Brokerage, Asset Managers & Exchanges ,First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,895,000 [3],[4],[8],[24]   4,895,000 [3],[4],[8],[24]   5,006,000 [6],[7],[9],[29]          
Investment, Identifier [Axis]: Groupe Product Life, Consumer Non-cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 782,000 [3],[4],[8],[10],[19]   782,000 [3],[4],[8],[10],[19]   1,059,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Gulf Finance, LLC, Oil & Gas Exploration & Production, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 372,000 [3],[11]   372,000 [3],[11]   570,000 [6],[12]          
Investment, Identifier [Axis]: Gusto Aus BidCo Pty Ltd., Consumer Non-Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,169,000 [3],[4],[8],[10],[32]   2,169,000 [3],[4],[8],[10],[32]   2,235,000 [6],[7],[9],[23],[43]          
Investment, Identifier [Axis]: HEKA Invest, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,020,000 [3],[4],[8],[10],[19]   5,020,000 [3],[4],[8],[10],[19]   5,080,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,526,000 [3],[4],[10],[11]   10,526,000 [3],[4],[10],[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 (59,000) [3],[4],[10],[11]   (59,000) [3],[4],[10],[11]   (7,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Advertising, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 11,072,000 [3],[4],[11]   11,072,000 [3],[4],[11]   10,816,000 [6],[7],[12]          
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 647,000 [3],[4],[8],[10],[32]   647,000 [3],[4],[8],[10],[32]   674,000 [6],[7],[9],[23],[43]          
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Healthcare, Subordinated Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 11,667,000 [4]   11,667,000 [4]   11,012,000 [7]          
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,243,000 [3],[4],[15]   7,243,000 [3],[4],[15]   7,295,000 [6],[7],[16]          
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (5,000) [3],[4],[10],[15]   (5,000) [3],[4],[10],[15]   0 [6],[7],[16],[23]          
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 3,139,000 [3],[4],[8],[34]   3,139,000 [3],[4],[8],[34]   3,155,000 [6],[7],[9],[29]          
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 110,000 [4],[13]   110,000 [4],[13]   101,000 [7],[14]          
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,238,000 [3],[4],[11]   7,238,000 [3],[4],[11]   7,101,000 [6],[7],[12]          
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (7,000) [3],[4],[10],[11]   (7,000) [3],[4],[10],[11]   342,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Herbalife Ltd., Food Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[15] 3,270,000   3,270,000              
Investment, Identifier [Axis]: Home Care Assistance, LLC, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,507,000 [3],[4],[11]   3,507,000 [3],[4],[11]   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 1,370,000 [3],[4],[10],[15]   1,370,000 [3],[4],[10],[15]   1,274,000 [6],[7],[16],[23]          
Investment, Identifier [Axis]: HomeX Services Group LLC, Home Construction, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[15]   0 [3],[4],[10],[15]   (7,000) [6],[7],[16],[23]          
Investment, Identifier [Axis]: Honour Lane Logistics Holdings Limited, Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,500,000 [3],[4],[8],[15]   6,500,000 [3],[4],[8],[15]   6,160,000 [6],[7],[9],[16]          
Investment, Identifier [Axis]: Hygie 31 Holding, Pharma-ceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,558,000 [3],[4],[8],[24]   1,558,000 [3],[4],[8],[24]   1,739,000 [6],[7],[9],[29]          
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],[14]         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 2,606,000 [3],[4],[8],[19]   2,606,000 [3],[4],[8],[19]   2,713,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: INOS 19-090 GmbH, Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,968,000 [3],[4],[8],[19]   4,968,000 [3],[4],[8],[19]   5,711,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Healthcare First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,769,000 [3],[4],[11]   6,769,000 [3],[4],[11]   6,616,000 [6],[7],[12]          
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Healthcare, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[11]   0 [3],[4],[10],[11]   (18,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 583,000 [4],[13]   583,000 [4],[13]   715,000 [7],[14]          
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 783,000 [3],[4],[15]   783,000 [3],[4],[15]   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],[15] 11,885,000   11,885,000              
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 191,000 [3],[4],[10],[15]   191,000 [3],[4],[10],[15]   67,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Ice House America, L.L.C., Consumer Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] 4,055,000   4,055,000              
Investment, Identifier [Axis]: Ice House America, L.L.C., Consumer Products, LLC Units (2,703 units)                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 305,000   305,000              
Investment, Identifier [Axis]: Ice House America, L.L.C., Consumer Products, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] 232,000   232,000              
Investment, Identifier [Axis]: Infoniqa Holdings GmbH, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,817,000 [3],[4],[8],[24]   2,817,000 [3],[4],[8],[24]   2,879,000 [6],[7],[9],[29]          
Investment, Identifier [Axis]: Innovad Group II BV, Beverage, Food & Tobacco, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 6,441,000 [3],[4],[8],[10],[24]   6,441,000 [3],[4],[8],[10],[24]   6,203,000 [6],[7],[9],[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 995,000 [3],[4],[8],[46]   995,000 [3],[4],[8],[46]   1,035,000 [6],[7],[9],[47]          
Investment, Identifier [Axis]: Innovative XCessories & Services, LLC, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,790,000 [2],[3],[17]   2,790,000 [2],[3],[17]   2,469,000 [5],[6],[18]          
Investment, Identifier [Axis]: Interstellar Group B.V., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 63,000 [3],[4],[8],[19]   63,000 [3],[4],[8],[19]   1,676,000 [6],[7],[9],[20],[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],[8],[10],[19] 1,537,000   1,537,000              
Investment, Identifier [Axis]: InvoCare Limited, Consumer Cyclical Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,022,000 [3],[4],[8],[10],[32]   2,022,000 [3],[4],[8],[10],[32]   2,051,000 [6],[7],[9],[23],[43]          
Investment, Identifier [Axis]: Iqor US Inc., Services: Business, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[16],[18]         2,622,000          
Investment, Identifier [Axis]: Isagenix International, LLC, Wholesale, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13]   0 [4],[13]   0 [7],[14]          
Investment, Identifier [Axis]: Isagenix International, LLC, Wholesale, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 749,000 [3],[4],[11],[17]   749,000 [3],[4],[11],[17]   718,000 [6],[12],[18]          
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), Trading Companies & Distributors, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,116,000 [3],[4],[8],[10],[19]   5,116,000 [3],[4],[8],[10],[19]   4,778,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Ivanti Software, Inc., High Tech Industries, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,818,000 [3],[11],[17]   3,818,000 [3],[11],[17]   4,800,000 [6],[12],[18]          
Investment, Identifier [Axis]: JF Acquisition, LLC, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,633,000 [3],[4],[11]   3,633,000 [3],[4],[11]   3,598,000 [6],[7],[12]          
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,152,000 [3],[4],[8],[24]   1,152,000 [3],[4],[8],[24]   1,176,000 [6],[7],[9],[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 6,714,000 [2],[3],[4],[8]   6,714,000 [2],[3],[4],[8]   6,648,000 [5],[6],[7],[9]          
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 2,808,000   2,808,000   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 41,182,000 [8],[10]   41,182,000 [8],[10]   41,053,000 [9],[23]          
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 41,182,000   41,182,000   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 3,754,000 [3],[4],[8],[10],[44]   3,754,000 [3],[4],[8],[10],[44]   3,844,000 [6],[7],[9],[23],[45]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,733,000 [3],[4],[11]   2,733,000 [3],[4],[11]   3,414,000 [6],[7],[12]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 683,000   683,000              
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 234,000 [4]   234,000 [4]   228,000 [7]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (8,000) [3],[4],[10],[11]   (8,000) [3],[4],[10],[11]   (8,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: Kano Laboratories LLC, Chemicals, Plastics & Rubber, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,520,000 [3],[4],[11]   8,520,000 [3],[4],[11]   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 207,000 [4],[13]   207,000 [4],[13]   224,000 [7],[14]          
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]: Kid Distro Holdings, LLC, Media & Entertainment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,074,000 [3],[4],[11]   9,074,000 [3],[4],[11]   9,116,000 [6],[7],[12]          
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, Media & Entertainment, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 644,000 [4],[13]   644,000 [4],[13]   599,000 [7],[14]          
Investment, Identifier [Axis]: Kona Buyer, LLC, High Tech Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,300,000 [3],[4],[11]   8,300,000 [3],[4],[11]   8,413,000 [6],[7],[12]          
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,837,000 [3],[4],[8],[10],[24]   1,837,000 [3],[4],[8],[10],[24]   1,854,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,666,000 [4],[8]   1,666,000 [4],[8]   1,587,000 [7],[9]          
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 699,000 [2],[3],[4],[8],[10]   699,000 [2],[3],[4],[8],[10]   659,000 [5],[6],[7],[9],[23]          
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 34,000 [2],[3],[4],[8],[10]   34,000 [2],[3],[4],[8],[10]   16,000 [5],[6],[7],[9],[23]          
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,070,000 [3],[4],[11]   10,070,000 [3],[4],[11]   10,096,000 [6],[7],[12]          
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 189,000 [4]   189,000 [4]   239,000 [7]          
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (17,000) [3],[4],[10],[11]   (17,000) [3],[4],[10],[11]   400,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Learfield Communications, LLC, Broadcasting, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 5,505,000 [3],[15]   5,505,000 [3],[15]   5,311,000 [6],[16]          
Investment, Identifier [Axis]: Learfield Communications, LLC, Broadcasting, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 6,139,000 [4],[13]   6,139,000 [4],[13]   4,037,000 [7],[14]          
Investment, Identifier [Axis]: Legal Solutions Holdings, Business Services, Senior Subordinated Loan                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[26],[48]   0 [4],[26],[48]   0 [7],[25],[49]          
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Consumer Goods: Durable, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,705,000 [3],[4],[11],[17]   2,705,000 [3],[4],[11],[17]   2,675,000 [6],[7],[12],[18]          
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Consumer Goods: Durable, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[18],[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],[16],[18]         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 7,646,000 [3],[4],[15]   7,646,000 [3],[4],[15]   6,308,000 [6],[7],[16]          
Investment, Identifier [Axis]: MB Purchaser, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] 1,952,000   1,952,000              
Investment, Identifier [Axis]: MB Purchaser, LLC, Technology, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 63,000   63,000              
Investment, Identifier [Axis]: MB Purchaser, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] (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 [3],[4],[10],[11]   5,019,000 [3],[4],[10],[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],[10],[11] 4,096,000   4,096,000              
Investment, Identifier [Axis]: MC Group Ventures Corporation, Business Services, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[14]         778,000          
Investment, Identifier [Axis]: MC Group Ventures Corporation, Business Services, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 939,000   939,000              
Investment, Identifier [Axis]: MNS Buyer, Inc., Construction and Building, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 898,000 [3],[4],[15]   898,000 [3],[4],[15]   901,000 [6],[7],[16]          
Investment, Identifier [Axis]: MNS Buyer, Inc., Construction and Building, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 102,000 [4],[13]   102,000 [4],[13]   82,000 [7],[14]          
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value [37] 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 [37] 9,575,000   9,575,000   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],[8],[48]   9,762,000 [4],[8],[48]   9,762,000 [7],[9],[49]          
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive, Common Equity interest                    
Schedule of Investments [Line Items]                    
Fair Value 9,575,000 [4],[8],[13],[48]   9,575,000 [4],[8],[13],[48]   15,430,000 [7],[9],[14],[49]          
Investment, Identifier [Axis]: MVC Private Equity Fund LP, General Partnership Interest                    
Schedule of Investments [Line Items]                    
Fair Value 12,000   12,000   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 12,000 [8],[13],[48]   12,000 [8],[13],[48]   24,000 [9],[14],[49]          
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Investment Funds & Vehicles, Limited Partnership Interest                    
Schedule of Investments [Line Items]                    
Fair Value 501,000 [8],[13],[48]   501,000 [8],[13],[48]   981,000 [9],[14],[49]          
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Limited Partnership Interest                    
Schedule of Investments [Line Items]                    
Fair Value 501,000   501,000   981,000 1,793,000        
Investment, Identifier [Axis]: Magnetite XIX, Limited, Multi-Sector Holdings, Subordinated Notes                    
Schedule of Investments [Line Items]                    
Fair Value 5,230,000 [8],[11],[17]   5,230,000 [8],[11],[17]   5,067,000 [9],[12],[18]          
Investment, Identifier [Axis]: Magnetite XIX, Limited, Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 7,844,000 [8],[17]   7,844,000 [8],[17]   8,181,000 [9],[18]          
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[10],[19],[26] (39,000)   (39,000)              
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, Super Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[19],[26] 182,000   182,000              
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 158,000 [3],[4],[8],[10],[19],[26]   158,000 [3],[4],[8],[10],[19],[26]   1,777,000 [6],[7],[9],[20],[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],[8],[19],[26] 908,000   908,000              
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[9],[20],[23]         6,000          
Investment, Identifier [Axis]: Marshall Excelsior Co., Capital Goods, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,752,000 [3],[4],[15]   10,752,000 [3],[4],[15]   10,462,000 [6],[7],[12]          
Investment, Identifier [Axis]: Marshall Excelsior Co., Capital Goods, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 2,150,000 [3],[4],[10],[11]   2,150,000 [3],[4],[10],[11]   1,914,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Containers, Packaging & Glass, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,779,000 [3],[4],[11]   2,779,000 [3],[4],[11]   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 3,911,000 [3],[4],[27]   3,911,000 [3],[4],[27]   3,946,000 [6],[7],[28]          
Investment, Identifier [Axis]: Median B.V., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,833,000 [3],[8],[30]   8,833,000 [3],[8],[30]   8,595,000 [6],[9],[31]          
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc., Healthcare, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,999,000 [3],[11]   2,999,000 [3],[11]   3,708,000 [6],[12]          
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 0   0              
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 4,117,000   4,117,000              
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 173,000   173,000              
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] 128,000   128,000              
Investment, Identifier [Axis]: Mercell Holding AS, Technology, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 127,000 [4],[8],[13]   127,000 [4],[8],[13]   128,000 [7],[9],[14]          
Investment, Identifier [Axis]: Mercell Holding AS, Technology, Class B Units                    
Schedule of Investments [Line Items]                    
Fair Value 42,000 [4],[8],[13]   42,000 [4],[8],[13]   51,000 [7],[9],[14]          
Investment, Identifier [Axis]: Mercell Holding AS, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,917,000 [3],[4],[8],[10],[50]   2,917,000 [3],[4],[8],[10],[50]   3,041,000 [6],[7],[9],[23],[51]          
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 7,687,000 [3],[4],[8],[10],[21]   7,687,000 [3],[4],[8],[10],[21]   7,784,000 [6],[7],[9],[23],[33]          
Investment, Identifier [Axis]: Moonlight Bidco Limited, Healthcare, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 176,000 [4],[8],[13]   176,000 [4],[8],[13]   1,380,000 [7],[9],[14]          
Investment, Identifier [Axis]: Moonlight Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,844,000 [3],[4],[8],[10],[27]   1,844,000 [3],[4],[8],[10],[27]   1,832,000 [6],[7],[9],[23],[28]          
Investment, Identifier [Axis]: Murphy Midco Limited, Media, Diversified & Production, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 778,000 [3],[4],[8],[30]   778,000 [3],[4],[8],[30]   1,670,000 [6],[7],[9],[31]          
Investment, Identifier [Axis]: Murphy Midco Limited, Media, Diversified & Production, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[30] 878,000   878,000              
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 397,000 [4],[13]   397,000 [4],[13]   473,000 [7],[14]          
Investment, Identifier [Axis]: NAW Buyer LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,622,000 [3],[4],[10],[11]   11,622,000 [3],[4],[10],[11]   11,446,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: NAW Buyer LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (15,000) [3],[4],[10],[11]   (15,000) [3],[4],[10],[11]   335,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,239,000 [3],[4],[15]   6,239,000 [3],[4],[15]   6,204,000 [6],[7],[12]          
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 646,000 [4],[13]   646,000 [4],[13]   633,000 [7],[14]          
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 429,000 [3],[4],[10],[15]   429,000 [3],[4],[10],[15]   417,000 [6],[7],[12],[23]          
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],[16]         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 2,122,000 [3],[4],[8],[10],[19]   2,122,000 [3],[4],[8],[10],[19]   2,175,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Napa Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 18,450,000 [3],[4],[8],[32]   18,450,000 [3],[4],[8],[32]   18,321,000 [6],[7],[9],[43]          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Class A Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 556,000 [4],[13]   556,000 [4],[13]   535,000 [7],[14]          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Class B Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 186,000 [4],[13]   186,000 [4],[13]   229,000 [7],[14]          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,113,000 [3],[4],[11]   5,113,000 [3],[4],[11]   5,562,000 [6],[7],[12]          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[11]   0 [3],[4],[10],[11]   (8,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[15] 2,310,000   2,310,000              
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[15] 329,000   329,000              
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[15] 2,930,000   2,930,000              
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[16]         2,918,000          
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],[16]         2,620,000          
Investment, Identifier [Axis]: NeoxCo, Internet Software & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,081,000 [3],[4],[8],[10],[24]   2,081,000 [3],[4],[8],[10],[24]   2,090,000 [6],[7],[9],[23],[29]          
Investment, Identifier [Axis]: Next Holdco, LLC,Technology,First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,357,000 [3],[4],[10],[15]   7,357,000 [3],[4],[10],[15]   7,236,000 [6],[7],[16],[23]          
Investment, Identifier [Axis]: Next Holdco, LLC,Technology,Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[15]   0 [3],[4],[10],[15]   (11,000) [6],[7],[16],[23]          
Investment, Identifier [Axis]: Northstar Recycling, LLC, Environmental Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,438,000 [3],[4],[11]   2,438,000 [3],[4],[11]   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 (10,000) [2],[3],[4],[8]   (10,000) [2],[3],[4],[8]   3,984,000 [5],[6],[7],[9],[23]          
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,295,000 [3],[4],[15]   8,295,000 [3],[4],[15]   5,485,000 [6],[7],[16]          
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 491,000 [4]   491,000 [4]   276,000 [7],[14]          
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 104,000 [3],[4],[10],[15]   104,000 [3],[4],[10],[15]   (12,000) [6],[7],[16],[23]          
Investment, Identifier [Axis]: OAC Holdings I Corp, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,549,000 [3],[4],[11]   3,549,000 [3],[4],[11]   3,454,000 [6],[7],[12]          
Investment, Identifier [Axis]: OAC Holdings I Corp, Automotive, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 306,000 [3],[4],[10],[11]   306,000 [3],[4],[10],[11]   (47,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: OG III B.V., Containers & Glass Products, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,326,000 [3],[4],[8],[19]   3,326,000 [3],[4],[8],[19]   3,390,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: ORTEC INTERNATIONAL NEWCO B.V. Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 960,000 [3],[4],[8],[19]   960,000 [3],[4],[8],[19]   985,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 12,924,000 [3],[4],[11]   12,924,000 [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 835,000 [3],[4],[10],[11]   835,000 [3],[4],[10],[11]   (107,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value (18,000) [3],[4],[10],[11]   (18,000) [3],[4],[10],[11]   (22,000) [6],[7],[12],[23]          
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]: Ocelot Holdco LLC, Construction Machinery, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13]   0 [4],[13]   0 [7],[14]          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 2,179,000 [4]   2,179,000 [4]   2,085,000 [7]          
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 2,933,000 [3],[4]   2,933,000 [3],[4]   2,933,000 [7]          
Investment, Identifier [Axis]: Ocular Therapeutix, Inc., Pharma-ceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,802,000 [3],[4],[8],[15]   4,802,000 [3],[4],[8],[15]   3,812,000 [6],[7],[9],[16]          
Investment, Identifier [Axis]: Offen Inc., Transportation: Cargo, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,704,000 [2],[4],[17]   3,704,000 [2],[4],[17]   3,691,000 [5],[7],[18]          
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 2,251,000 [2],[3],[4],[8]   2,251,000 [2],[3],[4],[8]   2,249,000 [5],[6],[7],[9]          
Investment, Identifier [Axis]: Oracle Vision Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,893,000 [3],[4],[8],[30]   2,893,000 [3],[4],[8],[30]   2,918,000 [6],[7],[9],[31]          
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 317,000 [3],[4],[8],[19]   317,000 [3],[4],[8],[19]   326,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 533,000 [3],[4],[8],[11]   533,000 [3],[4],[8],[11]   531,000 [6],[7],[9],[12]          
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 (28.8 units)                    
Schedule of Investments [Line Items]                    
Fair Value [4] 47,000   47,000              
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[11]   0 [3],[4],[10],[11]   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 3,015,000 [3],[4],[11]   3,015,000 [3],[4],[11]   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 [15] 4,457,000   4,457,000              
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[15] 7,357,000   7,357,000              
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 851,000 [3],[4],[8],[10],[19]   851,000 [3],[4],[8],[10],[19]   820,000 [6],[7],[9],[23],[42]          
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, Technology, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,378,000 [3],[4],[8],[11]   1,378,000 [3],[4],[8],[11]   1,305,000 [6],[7],[9],[16]          
Investment, Identifier [Axis]: Panoche Energy Center LLC, Electric, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,907,000   3,907,000   4,224,000 [7]          
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 2,772,000 [3],[4],[8],[24]   2,772,000 [3],[4],[8],[24]   2,804,000 [6],[7],[9],[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 1,500,000 [3],[4],[8],[11]   1,500,000 [3],[4],[8],[11]   1,482,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         605,000          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Healthcare, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 610,000   610,000              
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Healthcare, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 243,000 [4],[13]   243,000 [4],[13]   298,000 [7],[14]          
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 2,082,000 [3],[4],[8],[19]   2,082,000 [3],[4],[8],[19]   2,327,000 [6],[7],[9],[20]          
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 2,586,000 [3],[4],[8],[11]   2,586,000 [3],[4],[8],[11]   2,804,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class A                    
Schedule of Investments [Line Items]                    
Fair Value 177,000 [4],[8]   177,000 [4],[8]   172,000 [7],[9]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 178,000 [4],[8]   178,000 [4],[8]   173,000 [7],[9]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class C                    
Schedule of Investments [Line Items]                    
Fair Value 177,000 [4],[8]   177,000 [4],[8]   167,000 [7],[9]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class D                    
Schedule of Investments [Line Items]                    
Fair Value 176,000 [4],[8]   176,000 [4],[8]   166,000 [7],[9]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class E                    
Schedule of Investments [Line Items]                    
Fair Value 8,980,000 [4],[8]   8,980,000 [4],[8]   8,503,000 [7],[9]          
Investment, Identifier [Axis]: Permaconn BidCo Pty Ltd, Tele-communications, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,654,000 [3],[4],[8],[32]   2,654,000 [3],[4],[8],[32]   2,743,000 [6],[7],[9],[43]          
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,038,000 [3],[4],[11]   1,038,000 [3],[4],[11]   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 1,225,000 [4]   1,225,000 [4]   1,285,000 [7]          
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[11]   0 [3],[4],[10],[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 51,703,000 [3],[4],[11]   51,703,000 [3],[4],[11]   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 1,304,000 [4],[13]   1,304,000 [4],[13]   1,297,000 [7],[14]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 440,000 [4],[13]   440,000 [4],[13]   438,000 [7],[14]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class CC                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13]   0 [4],[13]   0 [7],[14]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class D                    
Schedule of Investments [Line Items]                    
Fair Value 126,000 [4],[13]   126,000 [4],[13]   125,000 [7],[14]          
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, Chemicals, Plastics & Rubber, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13]   0 [4],[13]   0 [7],[14]          
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, Chemicals, Plastics & Rubber, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 794,000 [3],[4],[15],[17]   794,000 [3],[4],[15],[17]   936,000 [6],[7],[16],[18]          
Investment, Identifier [Axis]: Premium Franchise Brands, LLC, Research & Consulting Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,945,000 [3],[4],[11]   9,945,000 [3],[4],[11]   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 8,885,000 [3],[4],[8],[10],[24]   8,885,000 [3],[4],[8],[10],[24]   9,031,000 [6],[7],[9],[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 2,772,000 [2],[3],[4],[8]   2,772,000 [2],[3],[4],[8]   2,778,000 [5],[6],[7],[9]          
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 5,260,000 [3],[4],[11]   5,260,000 [3],[4],[11]   5,462,000 [6],[7],[12]          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[14]         340,000          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 300,000   300,000              
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[11]   0 [3],[4],[10],[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 [3],[4],[11] 5,304,000   5,304,000              
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 304,000 [3],[4],[10],[11]   304,000 [3],[4],[10],[11]   (6,000) [6],[7],[12],[23]          
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 [2],[3],[4]   1,621,000 [2],[3],[4]   1,635,000 [5],[6],[7]          
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 194,000 [4],[13]   194,000 [4],[13]   220,000 [7],[14]          
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 363,000 [2],[3],[4],[10]   363,000 [2],[3],[4],[10]   274,000 [5],[6],[7],[23]          
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Second Lien Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 73,000 [4]   73,000 [4]   73,000 [7]          
Investment, Identifier [Axis]: Proppants Holding, LLC, Energy: Oil & Gas, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[17]   0 [4],[17]   0 [7],[18]          
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,751,000 [3],[4],[8],[10],[24]   1,751,000 [3],[4],[8],[10],[24]   1,630,000 [6],[7],[9],[23],[29]          
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 2,099,000 [3],[4],[8],[24]   2,099,000 [3],[4],[8],[24]   2,110,000 [6],[7],[9],[29]          
Investment, Identifier [Axis]: QPE7 SPV1 BidCo Pty Ltd, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,826,000 [3],[4],[8],[52]   1,826,000 [3],[4],[8],[52]   1,852,000 [6],[7],[9],[22]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 91,000 [4],[13]   91,000 [4],[13]   64,000 [7],[14]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 597,000 [3],[4],[11]   597,000 [3],[4],[11]   592,000 [6],[7],[12]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 167,000 [4],[13]   167,000 [4],[13]   159,000 [7],[14]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[11]   0 [3],[4],[10],[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 7,051,000 [3],[4],[8],[11]   7,051,000 [3],[4],[8],[11]   6,732,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,126,000 [2],[3],[4],[10]   6,126,000 [2],[3],[4],[10]   6,001,000 [5],[6],[7],[23]          
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 122,000 [2],[3],[4],[10]   122,000 [2],[3],[4],[10]   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 12,723,000 [3],[4],[15],[17]   12,723,000 [3],[4],[15],[17]   12,723,000 [6],[7],[12],[18]          
Investment, Identifier [Axis]: RA Outdoors, LLC, High Tech Industries, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,216,000 [3],[4],[15],[17]   1,216,000 [3],[4],[15],[17]   778,000 [6],[7],[12],[18],[23]          
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],[19] 6,690,000   6,690,000              
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 1,408,000 [3],[4],[11]   1,408,000 [3],[4],[11]   9,498,000 [6],[7],[20]          
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, First-Out Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] (4,000)   (4,000)              
Investment, Identifier [Axis]: RPX Corporation, Research & Consulting Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,394,000 [3],[4],[11]   4,394,000 [3],[4],[11]   4,732,000 [6],[7],[12]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class A Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13],[17]   0 [4],[13],[17]   0 [7],[14],[18]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class B Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13],[17]   0 [4],[13],[17]   0 [7],[14],[18]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class C Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 66,000 [4],[13],[17]   66,000 [4],[13],[17]   73,000 [7],[14],[18]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13],[17]   0 [4],[13],[17]   0 [7],[14],[18]          
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],[18]         8,717,000          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[18],[23]         524,000          
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 627,000 [2],[3],[4],[10]   627,000 [2],[3],[4],[10]   9,890,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[4] 10,061,000   10,061,000              
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 549,000 [4],[13]   549,000 [4],[13]   570,000 [7],[14]          
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 350,000 [3],[4],[10],[11]   350,000 [3],[4],[10],[11]   505,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,353,000 [3],[4],[11]   11,353,000 [3],[4],[11]   11,442,000 [6],[7],[12]          
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Technology, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 90,000 [4],[13]   90,000 [4],[13]   103,000 [7],[14]          
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Home Furnishings, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,250,000 [3],[4],[11]   4,250,000 [3],[4],[11]   4,167,000 [6],[7],[12]          
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Home Furnishings, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 65,000 [4],[13]   65,000 [4],[13]   67,000 [7],[14]          
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 0 [4],[13],[17]   0 [4],[13],[17]   762,000 [6],[7],[12],[18]          
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]: Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] (52,000)   (52,000)              
Investment, Identifier [Axis]: Rhondda Financing No. 1 DAC, Finance Companies, Structured - Junior Note                    
Schedule of Investments [Line Items]                    
Fair Value 28,944,000 [4],[8],[10]   28,944,000 [4],[8],[10]   29,586,000 [7],[9],[23]          
Investment, Identifier [Axis]: Riedel Beheer B.V., Food & Beverage, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,011,000 [3],[4],[8],[19]   2,011,000 [3],[4],[8],[19]   2,078,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Rocade Holdings LLC, Common LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [1] 1,959,000   1,959,000   844,000 0        
Investment, Identifier [Axis]: Rocade Holdings LLC, Other Financial, Common LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,959,000 [4],[13]   1,959,000 [4],[13]   844,000 [7],[14]          
Investment, Identifier [Axis]: Rocade Holdings LLC, Other Financial, Preferred LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 77,298,000 [4],[10],[11]   77,298,000 [4],[10],[11]   73,113,000 [7],[12],[23]          
Investment, Identifier [Axis]: Rocade Holdings LLC, Preferred LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [1] 77,298,000   77,298,000   73,113,000 0        
Investment, Identifier [Axis]: Rock Labor LLC, Media: Diversified & Production, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,408,000 [4],[13]   1,408,000 [4],[13]   1,534,000 [7],[14]          
Investment, Identifier [Axis]: Rock Labor LLC, Media: Diversified & Production, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,505,000 [2],[3],[4]   6,505,000 [2],[3],[4]   6,422,000 [6],[7],[16]          
Investment, Identifier [Axis]: Rock Labor LLC, Media: Diversified & Production, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (11,000) [2],[3],[4],[10]   (11,000) [2],[3],[4],[10]   (30,000) [6],[7],[16],[23]          
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,730,000 [3],[4],[10],[11]   7,730,000 [3],[4],[10],[11]   7,164,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (21,000) [3],[4],[10],[11]   (21,000) [3],[4],[10],[11]   388,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, Media Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,660,000 [3],[4],[11]   8,660,000 [3],[4],[11]   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 [3],[4],[11] 504,000   504,000              
Investment, Identifier [Axis]: SBP Holdings LP, Industrial Other, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,773,000 [3],[4],[11]   13,773,000 [3],[4],[11]   13,442,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: SBP Holdings LP, Industrial Other, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 284,000 [3],[4],[10],[11]   284,000 [3],[4],[10],[11]   (19,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: SISU ACQUISITIONCO., INC., Aerospace & Defense, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,889,000 [3],[4],[10],[15]   6,889,000 [3],[4],[10],[15]   6,463,000 [6],[7],[16],[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]: SSCP Pegasus Midco Limited, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,041,000 [3],[4],[8],[10],[27]   4,041,000 [3],[4],[8],[10],[27]   3,416,000 [6],[7],[9],[23],[28]          
Investment, Identifier [Axis]: SSCP Spring Bidco 3 Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 945,000 [3],[4],[8],[30]   945,000 [3],[4],[8],[30]   947,000 [6],[7],[9],[31]          
Investment, Identifier [Axis]: SVI International LLC, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[15] 631,000   631,000              
Investment, Identifier [Axis]: SVI International LLC, Automotive, LLC Units ($207,921 units)                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 200,000   200,000              
Investment, Identifier [Axis]: SVI International LLC, Automotive, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[15] (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 11,693,000 [3],[4],[11]   11,693,000 [3],[4],[11]   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 488,000 [4],[13]   488,000 [4],[13]   468,000 [7],[14]          
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],[8],[46] 1,759,000   1,759,000              
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,894,000 [3],[4],[8],[10],[19]   1,894,000 [3],[4],[8],[10],[19]   2,585,000 [6],[7],[9],[20],[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 494,000 [3],[4],[8],[19]   494,000 [3],[4],[8],[19]   3,357,000 [6],[7],[9],[47]          
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],[8],[19] 1,487,000   1,487,000              
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 4                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[46] 236,000   236,000              
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 5                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[46] 544,000   544,000              
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 6                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[46] 47,000   47,000              
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 7                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[46] 285,000   285,000              
Investment, Identifier [Axis]: Scaled Agile, Inc., Research & Consulting Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,639,000 [3],[4],[11]   1,639,000 [3],[4],[11]   1,759,000 [6],[7],[12]          
Investment, Identifier [Axis]: Scaled Agile, Inc., Research & Consulting Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 128,000 [3],[4],[10],[11]   128,000 [3],[4],[10],[11]   48,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 3,362,000 [3],[4],[8],[19]   3,362,000 [3],[4],[8],[19]   3,480,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 435,000 [3],[4],[8],[11]   435,000 [3],[4],[8],[11]   437,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 395,000 [3],[4],[8],[10],[19]   395,000 [3],[4],[8],[10],[19]   410,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan, 2023 Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [37] 3,751,000   3,751,000   3,866,000 0        
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan, Controlled                    
Schedule of Investments [Line Items]                    
Fair Value [37] 6,488,000   6,488,000   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 [37] 393,000   393,000   311,000 575,000        
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series B, Controlled                    
Schedule of Investments [Line Items]                    
Fair Value [37] 36,739,000   36,739,000   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 [37] 11,039,000   11,039,000   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 [37] 2,268,000   2,268,000   2,236,000 2,015,000        
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,488,000 [4],[8],[48]   6,488,000 [4],[8],[48]   6,328,000 [7],[9],[49]          
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series A                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[14],[49]         311,000          
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series A                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[13],[48] 393,000   393,000              
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series B                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[14],[49]         29,080,000          
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series B                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[13],[48] 36,739,000   36,739,000              
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 3,751,000 [4],[8],[10],[48]   3,751,000 [4],[8],[10],[48]   3,866,000 [7],[9],[23],[49]          
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,039,000 [4],[8],[48]   11,039,000 [4],[8],[48]   10,867,000 [7],[9],[49]          
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8],[10],[48] 2,268,000   2,268,000              
Investment, Identifier [Axis]: Security Holdings B.V.,Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9],[23],[49]         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],[8],[24] 481,000   481,000              
Investment, Identifier [Axis]: Sereni Capital NV, Consumer Cyclical, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 458,000 [3],[4],[8],[24]   458,000 [3],[4],[8],[24]   2,522,000 [6],[7],[9],[29]          
Investment, Identifier [Axis]: Sereni Capital NV, Consumer Cyclical, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[24] 1,574,000   1,574,000              
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Home Furnishings, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 709,000 [4],[13]   709,000 [4],[13]   791,000 [7],[14]          
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 2,952,000 [4],[8],[13]   2,952,000 [4],[8],[13]   1,548,000 [7],[9],[14]          
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 35,230,000 [3],[4],[8],[11]   35,230,000 [3],[4],[8],[11]   34,019,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Joint Venture, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 41,538,000 [8],[17]   41,538,000 [8],[17]   39,172,000 [9],[18]          
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 41,538,000   41,538,000   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 1,778,000 [3],[4],[8],[10],[19]   1,778,000 [3],[4],[8],[10],[19]   1,822,000 [6],[7],[9],[23],[29]          
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 409,000 [4],[13]   409,000 [4],[13]   288,000 [7],[14]          
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,561,000 [3],[4],[10],[11]   9,561,000 [3],[4],[10],[11]   9,332,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[11]   0 [3],[4],[10],[11]   (38,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: Smartling, Inc., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,491,000 [3],[4],[15]   10,491,000 [3],[4],[15]   10,466,000 [6],[7],[16]          
Investment, Identifier [Axis]: Smartling, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[15]   0 [3],[4],[10],[15]   (12,000) [6],[7],[16],[23]          
Investment, Identifier [Axis]: Smile Brands Group Inc., Health Care Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 4,075,000 [3],[4],[11]   4,075,000 [3],[4],[11]   4,533,000 [6],[7],[12]          
Investment, Identifier [Axis]: Smile Brands Group Inc., Health Care Services, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 554,000   554,000              
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],[9]         8,175,000          
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 15,319,000 [3],[4],[11]   15,319,000 [3],[4],[11]   15,140,000 [6],[7],[12]          
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 516,000 [4],[13]   516,000 [4],[13]   382,000 [7],[14]          
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 387,000 [3],[4],[10],[11]   387,000 [3],[4],[10],[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 238,000 [8],[13],[17]   238,000 [8],[13],[17]   579,000 [9],[14],[18]          
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 1,612,000 [3],[4],[10],[11]   1,612,000 [3],[4],[10],[11]   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],[11] 415,000   415,000              
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (3,000) [3],[4],[10],[11]   (3,000) [3],[4],[10],[11]   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 11,459,000 [3],[4],[10],[15]   11,459,000 [3],[4],[10],[15]   11,461,000 [6],[7],[16],[23]          
Investment, Identifier [Axis]: Spatial Business Systems LLC, Electric, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (15,000) [3],[4],[10],[15]   (15,000) [3],[4],[10],[15]   (21,000) [6],[7],[16],[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 [2],[3],[4],[8]   2,500,000 [2],[3],[4],[8]   2,490,000 [5],[6],[7],[9]          
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 17,062,000 [3],[4],[10],[11]   17,062,000 [3],[4],[10],[11]   12,825,000 [6],[7],[12]          
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (49,000) [3],[4],[10],[11]   (49,000) [3],[4],[10],[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 9,318,000 [4]   9,318,000 [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],[9],[16],[23]         1,997,000          
Investment, Identifier [Axis]: Syntax Systems Ltd, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[9],[16],[23]         620,000          
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Technology, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 77,000 [4],[13]   77,000 [4],[13]   73,000 [7],[14]          
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Technology, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,569,000 [4]   2,569,000 [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 2,066,000 [3],[4],[10],[11]   2,066,000 [3],[4],[10],[11]   810,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, First Lien Senior Secured Term Loan1                    
Schedule of Investments [Line Items]                    
Fair Value 623,000 [3],[4],[10],[11]   623,000 [3],[4],[10],[11]   584,000 [6],[7],[12]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 12,000 [4],[13]   12,000 [4],[13]   9,000 [7],[14]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[4],[10],[11]   0 [3],[4],[10],[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 7,830,000 [3],[4],[15]   7,830,000 [3],[4],[15]   7,915,000 [6],[7],[16]          
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,533,000 [3],[4],[10],[15]   2,533,000 [3],[4],[10],[15]   2,430,000 [6],[7],[16],[23]          
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (12,000) [3],[4],[10],[15]   (12,000) [3],[4],[10],[15]   223,000 [6],[7],[16],[23]          
Investment, Identifier [Axis]: Tanqueray Bidco Limited, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[10],[27] 0   0              
Investment, Identifier [Axis]: Tanqueray Bidco Limited, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[27] 1,715,000   1,715,000              
Investment, Identifier [Axis]: Tanqueray Bidco Limited, Technology. First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[9],[23],[28]         1,730,000          
Investment, Identifier [Axis]: Team Air Distributing, LLC, Consumer Cyclical, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 416,000 [4],[13]   416,000 [4],[13]   420,000 [7],[14]          
Investment, Identifier [Axis]: Team Air Distributing, LLC, Consumer Cyclical, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 593,000 [4]   593,000 [4]   590,000 [7]          
Investment, Identifier [Axis]: Team Car Care, LLC, Automotive, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[18]         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],[18]         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],[18]         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],[8],[10],[21] (7,000)   (7,000)              
Investment, Identifier [Axis]: Technology Service Stream BidCo Pty Ltd, Technology, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[10],[21] 732,000   732,000              
Investment, Identifier [Axis]: Techone B.V., Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,709,000 [3],[4],[8],[19]   3,709,000 [3],[4],[8],[19]   3,814,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Techone B.V., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (8,000) [3],[4],[8],[10],[19]   (8,000) [3],[4],[8],[10],[19]   201,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,344,000 [3],[4],[11]   8,344,000 [3],[4],[11]   6,226,000 [6],[7],[12]          
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (29,000) [3],[4],[10],[11]   (29,000) [3],[4],[10],[11]   (6,000) [6],[7],[12],[23]          
Investment, Identifier [Axis]: Terrybear, Inc., Consumer Products, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 139,000 [4],[13]   139,000 [4],[13]   115,000 [7],[14]          
Investment, Identifier [Axis]: Terrybear, Inc., Consumer Products, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 262,000 [4]   262,000 [4]   260,000 [7]          
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[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 [2],[3],[4] 3,715,000   3,715,000              
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 [3],[4],[11]   1,825,000 [3],[4],[11]   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 [3],[4],[11] 826,000   826,000              
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, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[7]         3,578,000          
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],[16]         12,680,000          
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Capital Equipment, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[16],[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 11,394,000 [3],[4],[10],[15]   11,394,000 [3],[4],[10],[15]   11,317,000 [6],[7],[16],[23]          
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 2,247,000 [4]   2,247,000 [4]   2,152,000 [7],[14]          
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,611,000 [3],[11]   3,611,000 [3],[11]   4,240,000 [6],[7],[12]          
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                    
Schedule of Investments [Line Items]                    
Fair Value [13] 9,570,000   9,570,000              
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value [14]         13,365,000          
Investment, Identifier [Axis]: Thompson Rivers LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 9,570,000   9,570,000   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],[16]         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],[16]         3,717,000          
Investment, Identifier [Axis]: Trader Corporation, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,454,000 [3],[4],[8],[53]   4,454,000 [3],[4],[8],[53]   4,617,000 [6],[7],[9],[54]          
Investment, Identifier [Axis]: Trader Corporation, Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (3,000) [3],[4],[8],[10],[53]   (3,000) [3],[4],[8],[10],[53]   (6,000) [6],[7],[9],[23],[54]          
Investment, Identifier [Axis]: Transit Technologies LLC, Software, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,250,000 [3],[4],[11]   9,250,000 [3],[4],[11]   6,035,000 [6],[7],[12]          
Investment, Identifier [Axis]: Transportation Insight, LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,452,000 [2],[3],[4]   9,452,000 [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 15,002,000 [3],[4],[11]   15,002,000 [3],[4],[11]   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 6,769,000 [3],[4],[15]   6,769,000 [3],[4],[15]   6,790,000 [6],[7],[16]          
Investment, Identifier [Axis]: Trintech, Inc., Technology, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 141,000 [3],[4],[10],[15]   141,000 [3],[4],[10],[15]   140,000 [6],[7],[16],[23]          
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 0 [4],[13],[17]   0 [4],[13],[17]   0 [7],[14],[18]          
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Preferred Unit                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13],[17]   0 [4],[13],[17]   0 [7],[14],[18]          
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, Class A LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 954,000 [4]   954,000 [4]   1,323,000 [7]          
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 15,930,000 [3],[4],[11]   15,930,000 [3],[4],[11]   6,739,000 [6],[7],[12]          
Investment, Identifier [Axis]: Turbo Buyer, Inc., Finance Companies, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,921,000 [3],[4],[11]   7,921,000 [3],[4],[11]   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 4,899,000 [3],[4],[11]   4,899,000 [3],[4],[11]   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 1,466,000 [3],[4],[8],[10],[35]   1,466,000 [3],[4],[8],[10],[35]   1,529,000 [6],[7],[9],[23],[36]          
Investment, Identifier [Axis]: UBC Ledgers Holding AB, Financial Other, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (5,000) [3],[4],[8],[10],[35]   (5,000) [3],[4],[8],[10],[35]   0 [6],[7],[9],[23],[36]          
Investment, Identifier [Axis]: UKFast Leaders Limited, Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,026,000 [3],[4],[8],[27]   11,026,000 [3],[4],[8],[27]   10,762,000 [6],[7],[9],[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 10,063,000 [3],[4],[10],[15]   10,063,000 [3],[4],[10],[15]   9,883,000 [6],[7],[16],[23]          
Investment, Identifier [Axis]: Union Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 920,000 [3],[4],[8],[10],[27]   920,000 [3],[4],[8],[10],[27]   877,000 [6],[7],[9],[23],[28]          
Investment, Identifier [Axis]: United Therapy Holding III GmbH, Healthcare, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,345,000 [3],[4],[8],[10],[24]   1,345,000 [3],[4],[8],[10],[24]   1,312,000 [6],[7],[9],[23],[29]          
Investment, Identifier [Axis]: Unither (Uniholding), Pharma-ceuticals, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,989,000 [3],[4],[8],[10],[19]   1,989,000 [3],[4],[8],[10],[19]   2,037,000 [6],[7],[9],[20],[23]          
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[8],[19] 1,531,000   1,531,000              
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 924,000 [3],[4],[8],[11]   924,000 [3],[4],[8],[11]   1,559,000 [6],[7],[9],[20]          
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,426,000 [3],[4],[8],[11]   2,426,000 [3],[4],[8],[11]   3,353,000 [6],[7],[9],[12]          
Investment, Identifier [Axis]: VOYA CLO 2015-2, LTD., Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 22,000 [8],[13],[17]   22,000 [8],[13],[17]   91,000 [9],[14],[18]          
Investment, Identifier [Axis]: VOYA CLO 2016-2, LTD., Multi-Sector Holdings, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 1,090,000 [8],[13],[17]   1,090,000 [8],[13],[17]   943,000 [9],[14],[18]          
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],[15]   4,783,000 [3],[4],[15]   4,783,000 [6],[7],[16]          
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 3,000 [4],[13],[17]   3,000 [4],[13],[17]   2,000 [7],[14],[18]          
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value 2,000 [4],[13],[17]   2,000 [4],[13],[17]   3,000 [7],[14],[18]          
Investment, Identifier [Axis]: Victoria Bidco Limited, Industrial Machinery, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 3,523,000 [3],[4],[8],[27]   3,523,000 [3],[4],[8],[27]   3,573,000 [6],[7],[9],[28]          
Investment, Identifier [Axis]: Vision Solutions Inc., Business Equipment & Services, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,216,000 [3],[11],[17]   6,216,000 [3],[11],[17]   5,908,000 [6],[12],[18]          
Investment, Identifier [Axis]: VistaJet Pass Through Trust 2021-1B, Airlines, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 3,516,000 [4]   3,516,000 [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 7,408,000 [3],[4],[11]   7,408,000 [3],[4],[11]   7,526,000 [6],[7],[12]          
Investment, Identifier [Axis]: Vital Buyer, LLC, Technology, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 304,000 [4]   304,000 [4]   434,000 [7],[14]          
Investment, Identifier [Axis]: W2O Holdings, Inc., Healthcare Technology, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,756,000 [4],[11]   5,756,000 [4],[11]   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 [3],[4],[11] 2,700,000   2,700,000              
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, Insurance, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] 2,482,000   2,482,000              
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, Insurance, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[11] 0   0              
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 2,148,000 [3],[4],[11]   2,148,000 [3],[4],[11]   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 [3],[4],[11] 9,876,000   9,876,000              
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]: 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                    
Schedule of Investments [Line Items]                    
Fair Value [8] 12,691,000   12,691,000              
Investment, Identifier [Axis]: Waccamaw River LLC, Investment Funds & Vehicles, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value [9],[14]         15,470,000          
Investment, Identifier [Axis]: Waccamaw River LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 12,691,000   12,691,000   15,470,000 $ 20,212,000        
Investment, Identifier [Axis]: Watermill-QMC Midco, Inc., Automotive, Equity                    
Schedule of Investments [Line Items]                    
Fair Value 0 [4],[13],[17]   0 [4],[13],[17]   0 [7],[14],[18]          
Investment, Identifier [Axis]: Wheels Up Experience Inc, Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,744,000 [4]   8,744,000 [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 593,000 [3],[4],[10],[11]   593,000 [3],[4],[10],[11]   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 [3],[4],[10],[11] 8,590,000   8,590,000              
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [7],[14]         804,000          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 821,000   821,000              
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,144,000 [3],[4],[10],[15]   1,144,000 [3],[4],[10],[15]   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 1,701,000 [3],[4],[8],[10],[11]   1,701,000 [3],[4],[8],[10],[11]   1,687,000 [6],[7],[9],[12],[23]          
Investment, Identifier [Axis]: Wok Holdings Inc., Retail, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 47,000 [3],[11],[17]   47,000 [3],[11],[17]   47,000 [6],[12],[18]          
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[14]         1,012,000          
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4],[13] 1,029,000   1,029,000              
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,082,000 [3],[4],[11]   6,082,000 [3],[4],[11]   4,946,000 [6],[7],[12]          
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [4] 386,000   386,000              
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,132,000 [3],[4],[10],[11]   1,132,000 [3],[4],[10],[11]   1,378,000 [6],[7],[12],[23]          
Investment, Identifier [Axis]: World 50, Inc., Professional Services, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 18,634,000 [3],[4],[11]   18,634,000 [3],[4],[11]   2,414,000 [6],[7],[12]          
Investment, Identifier [Axis]: World 50, Inc., Professional Services, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value (18,000) [3],[4],[11]   (18,000) [3],[4],[11]   8,760,000 [6],[7],[12]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[8] 3,433,000   3,433,000              
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 577,000 [4],[8],[13]   577,000 [4],[8],[13]   582,000 [7],[9],[14]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 293,000 [3],[4],[8],[27]   293,000 [3],[4],[8],[27]   6,448,000 [6],[7],[9],[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],[8],[10],[27] 7,113,000   7,113,000              
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[9]         3,241,000          
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [4] 220,000   220,000              
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[10],[11] 255,000   255,000              
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,636,000 [3],[4],[10],[11]   8,636,000 [3],[4],[10],[11]   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, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [6],[7],[12],[23]         (6,000)          
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Services: Business, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,760,000 [3],[4],[8],[27]   4,760,000 [3],[4],[8],[27]   5,718,000 [6],[7],[9],[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],[8],[27] 604,000   604,000              
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,469,000 [3],[4],[15]   3,469,000 [3],[4],[15]   3,473,000 [6],[7],[16]          
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value $ 0 [3],[4],[10],[15]   $ 0 [3],[4],[10],[15]   $ 0 [6],[7],[16],[23]          
[1]
(d)    The fair value of the investment was determined using significant unobservable inputs.
[2] The interest rate on these loans is subject to 6 Month SOFR, which as of June 30, 2024 was 5.25471%.
[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] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 28.2% of total investments at fair value as of June 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).
[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 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).
[10] Position or portion thereof is an unfunded loan or equity commitment.
[11] The interest rate on these loans is subject to 3 Month SOFR, which as of June 30, 2024 was 5.32460%.
[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 June 30, 2024 was 5.33717%.
[16] The interest rate on these loans is subject to 1 Month SOFR, which as of December 31, 2023 was 5.35472%.
[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] 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.
[19] The interest rate on these loans is subject to 3 Month EURIBOR, which as of June 30, 2024 was 3.71100%.
[20] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2023 was 3.90900%.
[21] The interest rate on these loans is subject to 6 Month BBSY, which as of June 30, 2024 was 4.73600%.
[22] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2023 was 4.31000%.
[23] Position or portion thereof is an unfunded loan or equity commitment.
[24] The interest rate on these loans is subject to 6 Month EURIBOR, which as of June 30, 2024 was 3.68200%.
[25] Non-accrual investment.
[26] Non-accrual investment.
[27] The interest rate on these loans is subject to 3 Month SONIA, which as of June 30, 2024 was 5.12780%.
[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 June 30, 2024 was 5.06220%.
[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 June 30, 2024 was 4.44530%.
[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 June 30, 2024 was 3.63200%.
[35] The interest rate on these loans is subject to 3 Month STIBOR, which as of June 30, 2024 was 3.70700%.
[36] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2023 was 4.05200%.
[37]
(d)    The fair value of the investment was determined using significant unobservable inputs.
[38] The interest rate on these loans is subject to 1 Month SONIA, which as of June 30, 2024 was 5.21250%.
[39] The interest rate on these loans is subject to 1 Month SONIA, which as of December 31, 2023 was 5.19920%.
[40] The interest rate on these loans is subject to 3 Month CORRA, which as of June 30, 2024 was 4.67875%.
[41] The interest rate on these loans is subject to 3 Month CDOR, which as of December 31, 2023 was 5.44750%.
[42] The interest rate on these loans is subject to 1 Month EURIBOR, which as of December 31, 2023 was 3.84500%.
[43] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2023 was 4.35750%.
[44] The interest rate on these loans is subject to 3 Month BKBM, which as of June 30, 2024 was 5.62000%.
[45] The interest rate on these loans is subject to 3 Month BKBM, which as of December 31, 2023 was 5.63000%.
[46] The interest rate on these loans is subject to 6 Month SARON, which as of June 30, 2024 was 1.21579%.
[47] The interest rate on these loans is subject to 6 Month SARON, which as of December 31, 2023 was 1.69524%.
[48] 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.
[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] The interest rate on these loans is subject to 1 Month NIBOR, which as of June 30, 2024 was 4.61000%.
[51] The interest rate on these loans is subject to 1 Month NIBOR, which as of December 31, 2023 was 4.59000%.
[52] The interest rate on these loans is subject to 1 Month BBSY, which as of June 30, 2024 was 4.30450%.
[53] The interest rate on these loans is subject to 1 Month CORRA, which as of June 30, 2024 was 4.74437%.
[54] The interest rate on these loans is subject to 1 Month CDOR, which as of December 31, 2023 was 5.45500%.