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INVESTMENTS - Waccamaw River LLC (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
loan
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
loan
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
loan
Dec. 31, 2023
USD ($)
Aug. 12, 2022
USD ($)
Jul. 08, 2021
USD ($)
Feb. 08, 2021
USD ($)
May 13, 2020
USD ($)
Schedule of Investments [Line Items]                    
Total dividend income $ 14,593,000 $ 11,734,000 $ 25,335,000 $ 20,210,000            
Fair Value 2,623,882,000   2,623,882,000   $ 2,449,272,000          
Waccamaw River LLC                    
Schedule of Investments [Line Items]                    
Total dividend income 200,000 2,600,000 500,000 2,600,000            
Distributions recognized as a return of capital $ 1,600,000 300,000 $ 3,300,000 300,000            
Investment owned, outstanding loans | loan 5,823   5,823   8,095          
Average loan amount $ 7,474   $ 7,474   $ 7,791          
Investment company, remaining average life to maturity     33 months 12 days   35 months 15 days          
Investment owned, weighted average yield rate 12.40%   12.40%   12.00%          
Waccamaw River LLC | Consumer Loan                    
Schedule of Investments [Line Items]                    
Fair Value $ 43,500,000   $ 43,500,000   $ 45,500,000          
Waccamaw River LLC | Cash and Cash Equivalents                    
Schedule of Investments [Line Items]                    
Fair Value 3,000,000   3,000,000   4,300,000          
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 9,100,000 $ 14,900,000 19,400,000 $ 14,900,000            
Investment, Identifier [Axis]: 1WorldSync, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,030,000 [1],[2],[3]   7,030,000 [1],[2],[3]   7,049,000 [4],[5],[6]          
Investment, Identifier [Axis]: A.T. Holdings II LTD, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,902,000 [3],[7],[8]   7,902,000 [3],[7],[8]   8,479,000 [6],[9],[10]          
Investment, Identifier [Axis]: AD Bidco, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,029,000 [1],[2],[3],[11]   13,029,000 [1],[2],[3],[11]   10,099,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: AD Bidco, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (14,000) [1],[2],[3],[11]   (14,000) [1],[2],[3],[11]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: ADB Safegate, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[10]         6,523,000          
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 600,000 [3],[13]   600,000 [3],[13]   550,000 [6],[14]          
Investment, Identifier [Axis]: AMMC CLO 22, Limited Series 2018-22A, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 469,000 [3],[8],[13],[15]   469,000 [3],[8],[13],[15]   1,733,000 [6],[10],[16]          
Investment, Identifier [Axis]: APC1 Holding, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,700,000 [2],[3],[8],[17]   2,700,000 [2],[3],[8],[17]   2,370,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: APOG Bidco Pty Ltd, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[19]         864,000          
Investment, Identifier [Axis]: ASC Communications, LLC, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 954,000 [3],[13]   954,000 [3],[13]   869,000 [6]          
Investment, Identifier [Axis]: ASC Communications, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,136,000 [1],[2],[3]   6,136,000 [1],[2],[3]   7,344,000 [5],[6],[20]          
Investment, Identifier [Axis]: ASC Communications, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [1],[2],[3],[11]   0 [1],[2],[3],[11]   0 [5],[6],[12],[20]          
Investment, Identifier [Axis]: ATL II MRO Holdings Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 18,987,000 [2],[3],[21]   18,987,000 [2],[3],[21]   19,021,000 [4],[5],[6]          
Investment, Identifier [Axis]: ATL II MRO Holdings Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (39,000) [2],[3],[11],[21]   (39,000) [2],[3],[11],[21]   (49,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: AVSC Holding Corp., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [5],[20]         148,000          
Investment, Identifier [Axis]: AVSC Holding Corp., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [5],[20]         2,000          
Investment, Identifier [Axis]: Accelerant Holdings, Class A Convertible Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value 6,601,000 [3],[13]   6,601,000 [3],[13]   6,347,000 [6],[14]          
Investment, Identifier [Axis]: Accelerant Holdings, Class B Convertible Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value 2,470,000 [3],[13]   2,470,000 [3],[13]   2,285,000 [6],[14]          
Investment, Identifier [Axis]: Accelerant Holdings, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 8,543,000 [3],[13]   8,543,000 [3],[13]   7,840,000 [6],[14]          
Investment, Identifier [Axis]: Accelevation LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] 3,044,000   3,044,000              
Investment, Identifier [Axis]: Accelevation LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] 331,000   331,000              
Investment, Identifier [Axis]: Acclime Holdings HK Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,453,000 [2],[3],[8],[22]   2,453,000 [2],[3],[8],[22]   2,438,000 [5],[6],[10],[23]          
Investment, Identifier [Axis]: Acclime Holdings HK Limited, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8] 229,000   229,000              
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   0 [6],[14]          
Investment, Identifier [Axis]: Accurus Aerospace Corporation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,958,000 [1],[2],[3]   12,958,000 [1],[2],[3]   11,612,000 [4],[5],[6]          
Investment, Identifier [Axis]: Accurus Aerospace Corporation, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 0   0              
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,291,000 [2],[3],[11],[21]   1,291,000 [2],[3],[11],[21]   1,768,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Acogroup, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,701,000 [2],[3],[8],[17],[24]   3,701,000 [2],[3],[8],[17],[24]   5,412,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Adhefin International, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,946,000 [2],[3],[8],[11],[17]   1,946,000 [2],[3],[8],[11],[17]   1,716,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Adhefin International, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 429,000 [2],[3],[8],[17]   429,000 [2],[3],[8],[17]   326,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class A1 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 534,000 [3],[13]   534,000 [3],[13]   593,000 [6],[14]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class A2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 138,000 [3],[13]   138,000 [3],[13]   153,000 [6],[14]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class B1 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   0 [6],[14]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class B2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   0 [6],[14]          
Investment, Identifier [Axis]: Aegros Holdco 2 Ltd, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 12,000   12,000              
Investment, Identifier [Axis]: Aegros Holdco 2 Ltd, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8] 6,165,000   6,165,000              
Investment, Identifier [Axis]: Air Canada 2020-2 Class B Pass Through Trust, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 1,812,000   1,812,000   2,411,000          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 3,224,000 [2],[3],[21]   3,224,000 [2],[3],[21]   2,710,000 [4],[5],[6]          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 3,244,000 [2],[3],[11],[21]   3,244,000 [2],[3],[11],[21]   3,828,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (5,000) [2],[3],[11],[21]   (5,000) [2],[3],[11],[21]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Aldinger Company, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[11] 1,343,000   1,343,000              
Investment, Identifier [Axis]: AlliA Insurance Brokers NV, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,447,000 [2],[3],[8],[11],[17]   5,447,000 [2],[3],[8],[11],[17]   4,569,000 [5],[6],[10],[12],[25]          
Investment, Identifier [Axis]: Alpine SG, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,775,000 [2],[3],[15],[21]   12,775,000 [2],[3],[15],[21]   22,949,000 [4],[5],[6],[16]          
Investment, Identifier [Axis]: Amalfi Midco, Class B Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 2,711,000 [3],[8],[13]   2,711,000 [3],[8],[13]   1,239,000 [6],[10],[14]          
Investment, Identifier [Axis]: Amalfi Midco, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 341,000 [3],[8]   341,000 [3],[8]   290,000 [6],[10]          
Investment, Identifier [Axis]: Amalfi Midco, Subordinated Loan Notes                    
Schedule of Investments [Line Items]                    
Fair Value 6,350,000 [3],[8]   6,350,000 [3],[8]   5,492,000 [6],[10]          
Investment, Identifier [Axis]: Amalfi Midco, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value 1,084,000 [3],[8],[13]   1,084,000 [3],[8],[13]   919,000 [6],[10],[14]          
Investment, Identifier [Axis]: Americo Chemical Products, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 115,000 [3],[13]   115,000 [3],[13]   119,000 [6],[14]          
Investment, Identifier [Axis]: Americo Chemical Products, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,544,000 [1],[2],[3]   2,544,000 [1],[2],[3]   2,611,000 [5],[6],[20]          
Investment, Identifier [Axis]: Americo Chemical Products, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (6,000) [1],[2],[3],[11]   (6,000) [1],[2],[3],[11]   (7,000) [5],[6],[12],[20]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 3,412,000 [2],[3],[8],[17]   3,412,000 [2],[3],[8],[17]   2,995,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,821,000 [2],[3],[8],[26]   2,821,000 [2],[3],[8],[26]   1,576,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 1,013,000 [2],[3],[8],[21]   1,013,000 [2],[3],[8],[21]   904,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 4                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[10]         1,008,000          
Investment, Identifier [Axis]: Apex Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,400,000 [2],[3],[8],[27]   3,400,000 [2],[3],[8],[27]   3,180,000 [5],[6],[10],[28]          
Investment, Identifier [Axis]: Apex Bidco Limited, Subordinated Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 341,000 [3],[8]   341,000 [3],[8]   297,000 [6],[10]          
Investment, Identifier [Axis]: Apidos CLO XXIV, Series 2016-24A, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 2,455,000 [8],[15]   2,455,000 [8],[15]   3,272,000 [10],[16]          
Investment, Identifier [Axis]: Application Boot Camp LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 235,000   235,000              
Investment, Identifier [Axis]: Application Boot Camp LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 1,613,000   1,613,000              
Investment, Identifier [Axis]: Application Boot Camp LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] (5,000)   (5,000)              
Investment, Identifier [Axis]: Application Boot Camp LLC, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3] 82,000   82,000              
Investment, Identifier [Axis]: Aptus 1829. GmbH, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[8],[13]   0 [3],[8],[13]   0 [6],[10],[14]          
Investment, Identifier [Axis]: Aptus 1829. GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[25]         1,994,000          
Investment, Identifier [Axis]: Aptus 1829. GmbH, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[26] 2,333,000   2,333,000              
Investment, Identifier [Axis]: Aptus 1829. GmbH, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[17] 1,238,000   1,238,000              
Investment, Identifier [Axis]: Aptus 1829. GmbH, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 69,000 [3],[8],[13]   69,000 [3],[8],[13]   40,000 [6],[10],[14]          
Investment, Identifier [Axis]: Apus Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,948,000 [2],[3],[8],[29]   3,948,000 [2],[3],[8],[29]   3,608,000 [5],[6],[10],[30]          
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,908,000 [2],[3],[8],[29]   6,908,000 [2],[3],[8],[29]   6,314,000 [5],[6],[10],[12],[28]          
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,496,000 [2],[3],[8],[29]   2,496,000 [2],[3],[8],[29]   2,119,000 [5],[6],[10],[28]          
Investment, Identifier [Axis]: Arc Education, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,339,000 [2],[3],[8],[11],[26]   4,339,000 [2],[3],[8],[11],[26]   3,807,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Arch Global Precision LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,786,000 [2],[3],[21]   8,786,000 [2],[3],[21]   8,769,000 [4],[5],[6]          
Investment, Identifier [Axis]: Archimede, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,503,000 [2],[3],[8],[17]   6,503,000 [2],[3],[8],[17]   5,676,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Argus Bidco Limited, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[8],[13]   0 [3],[8],[13]   0 [6],[10],[14]          
Investment, Identifier [Axis]: Argus Bidco Limited, Equity Loan Notes                    
Schedule of Investments [Line Items]                    
Fair Value 33,000 [3],[8]   33,000 [3],[8]   33,000 [6],[10]          
Investment, Identifier [Axis]: Argus Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,036,000 [2],[3],[8],[26]   2,036,000 [2],[3],[8],[26]   1,773,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Argus Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 129,000 [2],[3],[8],[22]   129,000 [2],[3],[8],[22]   127,000 [4],[5],[6],[10]          
Investment, Identifier [Axis]: Argus Bidco Limited, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 1,752,000 [2],[3],[8],[11],[29]   1,752,000 [2],[3],[8],[11],[29]   1,584,000 [5],[6],[10],[12],[28]          
Investment, Identifier [Axis]: Argus Bidco Limited, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 33,000 [3],[8]   33,000 [3],[8]   33,000 [6],[10]          
Investment, Identifier [Axis]: Argus Bidco Limited, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 889,000 [3],[8]   889,000 [3],[8]   777,000 [6],[10]          
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,780,000 [2],[3],[22]   5,780,000 [2],[3],[22]   5,637,000 [4],[5],[6]          
Investment, Identifier [Axis]: Artemis Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 468,000 [2],[3],[8],[11],[17]   468,000 [2],[3],[8],[11],[17]   256,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Astra Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 449,000 [2],[3],[8],[17]   449,000 [2],[3],[8],[17]   396,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Astra Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,653,000 [2],[3],[8],[29]   2,653,000 [2],[3],[8],[29]   2,365,000 [5],[6],[10],[12],[30]          
Investment, Identifier [Axis]: Auxi International, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,550,000 [2],[3],[8],[17]   1,550,000 [2],[3],[8],[17]   1,351,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Auxi International, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 866,000 [2],[3],[8],[29]   866,000 [2],[3],[8],[29]   782,000 [5],[6],[10],[30]          
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,581,000 [2],[3],[8],[11],[31]   1,581,000 [2],[3],[8],[11],[31]   1,967,000 [5],[6],[10],[12],[32]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 310,000 [3],[13]   310,000 [3],[13]   288,000 [6],[14]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,761,000 [1],[2],[3]   4,761,000 [1],[2],[3]   4,785,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [1],[2],[3],[11]   0 [1],[2],[3],[11]   0 [5],[6],[12],[20]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,924,000 [3]   1,924,000 [3]   1,805,000 [6]          
Investment, Identifier [Axis]: BKF Buyer, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,095,000 [3],[13]   1,095,000 [3],[13]   1,045,000 [6],[14]          
Investment, Identifier [Axis]: BKF Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,001,000 [1],[2],[3]   8,001,000 [1],[2],[3]   8,015,000 [5],[6],[20]          
Investment, Identifier [Axis]: BKF Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (42,000) [1],[2],[3],[11]   (42,000) [1],[2],[3],[11]   (52,000) [5],[6],[12],[20]          
Investment, Identifier [Axis]: BNI Global, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,567,000 [2],[3],[33]   10,567,000 [2],[3],[33]   9,302,000 [5],[6],[34]          
Investment, Identifier [Axis]: BPG Holdings IV Corp, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,285,000 [2],[3],[21]   12,285,000 [2],[3],[21]   12,560,000 [4],[5],[6]          
Investment, Identifier [Axis]: BVI Medical, Inc., Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[18]         9,482,000          
Investment, Identifier [Axis]: Bariacum S.A, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,381,000 [2],[3],[8],[26]   3,381,000 [2],[3],[8],[26]   3,107,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Basin Innovation Group, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,924,000 [2],[3],[11],[22]   13,924,000 [2],[3],[11],[22]   13,949,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: Basin Innovation Group, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (23,000) [2],[3],[11],[22]   (23,000) [2],[3],[11],[22]   (28,000) [5],[6],[12],[20]          
Investment, Identifier [Axis]: Benify (Bennevis AB), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[35]         854,000          
Investment, Identifier [Axis]: Beyond Risk Management, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,295,000 [2],[3],[11],[21]   5,295,000 [2],[3],[11],[21]   5,322,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Bidwax, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,118,000 [2],[3],[8],[26]   8,118,000 [2],[3],[8],[26]   7,088,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Biolam Group, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Biolam Group, Convertible Bonds                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Biolam Group, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,437,000 [2],[3],[8],[11],[24],[26]   1,437,000 [2],[3],[8],[11],[24],[26]   1,406,000 [5],[6],[10],[12],[25],[36]          
Investment, Identifier [Axis]: Biolam Group, Ordinary Shares                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock A                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock A2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock B                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock C                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock O1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock O2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Biolam Group, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Biolam, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: Biolam, Convertible Bonds                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: Biolam, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [37] 1,437,000   1,437,000   0          
Investment, Identifier [Axis]: Biolam, Ordinary Shares                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: Biolam, Preferred Stock A                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: Biolam, Preferred Stock A2                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: Biolam, Preferred Stock B                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: Biolam, Preferred Stock C                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: Biolam, Preferred Stock O1                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: Biolam, Preferred Stock O2                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: Biolam, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 0 [38],[39]   0 [38],[39]   0 [6],[16],[36],[38],[39] $ 4,869,000 [40],[41]        
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 0 [38],[39]   0 [38],[39]   2,744,000 [5],[6],[16],[20],[36],[38],[39] 7,166,000 [40],[41]        
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [6],[14],[16]         0          
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [39]   0 [39]   0 [39] 0 [41]        
Investment, Identifier [Axis]: Bounteous, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,056,000 [1],[2],[3]   4,056,000 [1],[2],[3]   4,081,000 [4],[5],[6]          
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Municipal Revenue Bond                    
Schedule of Investments [Line Items]                    
Fair Value 28,013,000   28,013,000   27,859,000          
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Preferred Stock- Series C                    
Schedule of Investments [Line Items]                    
Fair Value 14,982,000 [3]   14,982,000 [3]   14,618,000 [6]          
Investment, Identifier [Axis]: BrightSign LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,998,000 [1],[2],[3]   4,998,000 [1],[2],[3]   4,657,000 [5],[6],[20]          
Investment, Identifier [Axis]: BrightSign LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 1,207,000   1,207,000              
Investment, Identifier [Axis]: BrightSign LLC, LLC units                    
Schedule of Investments [Line Items]                    
Fair Value [6]         1,174,000          
Investment, Identifier [Axis]: BrightSign LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 806,000 [1],[2],[3],[11]   806,000 [1],[2],[3],[11]   1,085,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: Brightpay Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,424,000 [2],[3],[8],[17]   2,424,000 [2],[3],[8],[17]   386,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Brightpay Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[25]         1,720,000          
Investment, Identifier [Axis]: British Airways 2020-1 Class B Pass Through Trust, First Lien Senior Secured Bond                    
Schedule of Investments [Line Items]                    
Fair Value 456,000   456,000   507,000          
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 15,321,000 [2],[3],[8],[29]   15,321,000 [2],[3],[8],[29]   14,454,000 [5],[6],[10],[30]          
Investment, Identifier [Axis]: Broadstone Group UK LTD, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[11],[29] 3,325,000   3,325,000              
Investment, Identifier [Axis]: Brook & Whittle Holding Corp., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,957,000 [2],[15],[22]   1,957,000 [2],[15],[22]   2,461,000 [4],[5],[16]          
Investment, Identifier [Axis]: Brown Machine Group Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,619,000 [2],[3],[21]   5,619,000 [2],[3],[21]   5,716,000 [5],[6],[20]          
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 439,000 [3],[13]   439,000 [3],[13]   450,000 [6],[14]          
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,241,000 [2],[3],[21]   4,241,000 [2],[3],[21]   4,364,000 [5],[6],[23]          
Investment, Identifier [Axis]: CAi Software, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,466,000 [2],[3],[21]   12,466,000 [2],[3],[21]   12,455,000 [4],[5],[6]          
Investment, Identifier [Axis]: CAi Software, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,261,000 [2],[3],[11],[21]   1,261,000 [2],[3],[11],[21]   1,246,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: CCFF Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,819,000 [2],[3],[11],[22]   5,819,000 [2],[3],[11],[22]   5,809,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: CCFF Buyer, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 239,000 [3]   239,000 [3]   235,000 [6]          
Investment, Identifier [Axis]: CCFF Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (12,000) [2],[3],[11],[22]   (12,000) [2],[3],[11],[22]   (15,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: CGI Parent, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,933,000 [2],[3],[21]   13,933,000 [2],[3],[21]   14,008,000 [4],[5],[6]          
Investment, Identifier [Axis]: CGI Parent, LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,893,000 [3],[13]   1,893,000 [3],[13]   1,710,000 [6],[14]          
Investment, Identifier [Axis]: CGI Parent, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[11],[21]   0 [2],[3],[11],[21]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: CH Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3] 861,000   861,000              
Investment, Identifier [Axis]: CH Buyer, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 69,000   69,000              
Investment, Identifier [Axis]: CH Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] (1,000)   (1,000)              
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6]         12,140,000          
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 10,097,000 [2],[3],[22]   10,097,000 [2],[3],[22]   1,523,000 [4],[5],[6]          
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 3,760,000   3,760,000              
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,095,000 [2],[3],[21]   4,095,000 [2],[3],[21]   3,381,000 [4],[5],[6]          
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   0 [6],[14]          
Investment, Identifier [Axis]: CSL DualCom, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,367,000 [2],[3],[8],[42]   2,367,000 [2],[3],[8],[42]   2,016,000 [5],[6],[10],[12],[43]          
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, 2024 LIFO Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,527,000 [2],[3],[21]   4,527,000 [2],[3],[21]   4,211,000 [4],[5],[6]          
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 934,000 [3],[13]   934,000 [3],[13]   695,000 [6],[14]          
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 11,376,000   11,376,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, First Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6]         2,860,000          
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, First Out Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 832,000   832,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, First Out Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 2,232,000   2,232,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Second Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 639,000 [2],[3],[21]   639,000 [2],[3],[21]   597,000 [4],[5],[6]          
Investment, Identifier [Axis]: CW Group Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,073,000 [2],[3],[11],[21]   5,073,000 [2],[3],[11],[21]   2,732,000 [4],[5],[6]          
Investment, Identifier [Axis]: CW Group Holdings, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 460,000 [3]   460,000 [3]   371,000 [6]          
Investment, Identifier [Axis]: Caldwell & Gregory LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,212,000 [2],[3],[11],[21]   13,212,000 [2],[3],[11],[21]   18,833,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Caldwell & Gregory LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (28,000) [2],[3],[11],[21]   (28,000) [2],[3],[11],[21]   (34,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Class A Equity                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[8],[13]   0 [3],[8],[13]   0 [6],[10],[14]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Class C - Warrants                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[8],[13]   0 [3],[8],[13]   0 [6],[10],[14]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Class X Equity                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[8],[13]   0 [3],[8],[13]   0 [6],[10],[14]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[8],[13]   0 [3],[8],[13]   0 [6],[10],[14]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 242,000 [2],[3],[8],[24],[44]   242,000 [2],[3],[8],[24],[44]   360,000 [5],[6],[10],[36],[45]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Super Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 253,000 [3],[8],[11]   253,000 [3],[8],[11]   185,000 [6],[10],[12]          
Investment, Identifier [Axis]: Caribou Holding Company, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[10]         4,236,000          
Investment, Identifier [Axis]: Caribou Holding Company, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [6],[10],[14]         682,000          
Investment, Identifier [Axis]: Cascade Residential Services LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,405,000 [2],[3],[11],[21]   4,405,000 [2],[3],[11],[21]   3,742,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Cascade Residential Services LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 306,000 [2],[3],[11],[21]   306,000 [2],[3],[11],[21]   312,000 [4],[5],[6]          
Investment, Identifier [Axis]: Catawba River Limited, Structured - Junior Note                    
Schedule of Investments [Line Items]                    
Fair Value 2,207,000 [3],[8],[13]   2,207,000 [3],[8],[13]   2,365,000 [6],[10]          
Investment, Identifier [Axis]: Celebration Bidco, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 7,446,000 [3],[13]   7,446,000 [3],[13]   11,262,000 [6],[14]          
Investment, Identifier [Axis]: Celebration Bidco, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 7,446,000   7,446,000   11,262,000 [46] 12,177,000 [46]        
Investment, Identifier [Axis]: Celebration Bidco, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,824,000 [3],[21]   7,824,000 [3],[21]   6,414,000 [4],[6]          
Investment, Identifier [Axis]: Celebration Bidco, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,824,000   7,824,000   6,414,000 [46] 6,214,000 [46]        
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[18]         2,996,000          
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[17] 3,396,000   3,396,000              
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[17] 1,821,000   1,821,000              
Investment, Identifier [Axis]: Ceres Pharma NV, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[25]         3,167,000          
Investment, Identifier [Axis]: Ceres Pharma NV, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[26] 3,565,000   3,565,000              
Investment, Identifier [Axis]: Ceres Pharma NV, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[11],[17] 160,000   160,000              
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 19,807,000 [3],[13]   19,807,000 [3],[13]   16,852,000 [6],[14],[46] 12,160,000 [46]        
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3] 23,131,000   23,131,000              
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 15,832,000   15,832,000   15,770,000 [6],[46] 15,649,000 [46]        
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 7,299,000   7,299,000   7,271,000 [6],[46] 6,868,000 [46]        
Investment, Identifier [Axis]: Cobham Slip Rings SAS, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,272,000 [2],[3],[8],[21]   1,272,000 [2],[3],[8],[21]   1,303,000 [5],[6],[10],[23]          
Investment, Identifier [Axis]: Coherus Biosciences, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,907,000 [2],[3],[21]   3,907,000 [2],[3],[21]   3,903,000 [4],[5],[6]          
Investment, Identifier [Axis]: Coherus Biosciences, Inc., Royalty Rights                    
Schedule of Investments [Line Items]                    
Fair Value 1,542,000 [3]   1,542,000 [3]   5,834,000 [6]          
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Class B Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 152,000 [3],[13]   152,000 [3],[13]   175,000 [6],[14]          
Investment, Identifier [Axis]: Compass Precision, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 299,000 [3],[13]   299,000 [3],[13]   299,000 [6],[14]          
Investment, Identifier [Axis]: Compass Precision, LLC, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 650,000 [3]   650,000 [3]   640,000 [6]          
Investment, Identifier [Axis]: Comply365, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,600,000 [2],[3],[21]   10,600,000 [2],[3],[21]   18,663,000 [5],[6],[20]          
Investment, Identifier [Axis]: Comply365, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (24,000) [2],[3],[11],[21]   (24,000) [2],[3],[11],[21]   0 [5],[6],[12],[20]          
Investment, Identifier [Axis]: Contabo Finco S.À.R.L, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[18]         4,822,000          
Investment, Identifier [Axis]: Contabo FincoS.À R.L, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[17] 5,466,000   5,466,000              
Investment, Identifier [Axis]: Coyo Uprising GmbH, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 239,000 [3],[8],[13]   239,000 [3],[8],[13]   206,000 [6],[10],[14]          
Investment, Identifier [Axis]: Coyo Uprising GmbH, Class B Units                    
Schedule of Investments [Line Items]                    
Fair Value 446,000 [3],[8],[13]   446,000 [3],[8],[13]   381,000 [6],[10],[14]          
Investment, Identifier [Axis]: Coyo Uprising GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,354,000 [2],[3],[8],[11],[26]   5,354,000 [2],[3],[8],[11],[26]   4,590,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: DAWGS Intermediate Holdings Co., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 6,742,000   6,742,000              
Investment, Identifier [Axis]: DAWGS Intermediate Holdings Co., LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 384,000   384,000              
Investment, Identifier [Axis]: DAWGS Intermediate Holdings Co., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 238,000   238,000              
Investment, Identifier [Axis]: DISA Holdings Corp., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,915,000 [2],[3],[21]   6,915,000 [2],[3],[21]   6,950,000 [4],[5],[6]          
Investment, Identifier [Axis]: DISA Holdings Corp., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 86,000 [2],[3],[11],[21]   86,000 [2],[3],[11],[21]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: DataServ Integrations, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[23]         1,871,000          
Investment, Identifier [Axis]: DataServ Integrations, LLC, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [6],[14]         103,000          
Investment, Identifier [Axis]: DataServ Integrations, LLC, Preferred Units                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 200,000   200,000              
Investment, Identifier [Axis]: DataServ Integrations, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[12],[23]         0          
Investment, Identifier [Axis]: David Wood Baking UK Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 890,000 [2],[3],[8],[29]   890,000 [2],[3],[8],[29]   818,000 [5],[6],[10],[30]          
Investment, Identifier [Axis]: DecksDirect, LLC, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   0 [6],[14]          
Investment, Identifier [Axis]: DecksDirect, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   0 [6],[14]          
Investment, Identifier [Axis]: DecksDirect, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,167,000 [2],[3],[21]   1,167,000 [2],[3],[21]   1,383,000 [4],[5],[6]          
Investment, Identifier [Axis]: DecksDirect, LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [3] 0   0              
Investment, Identifier [Axis]: DecksDirect, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (69,000) [2],[3],[11],[21]   (69,000) [2],[3],[11],[21]   301,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Discovery Buyer, L.P., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 12,293,000   12,293,000              
Investment, Identifier [Axis]: Discovery Buyer, L.P., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] (20,000)   (20,000)              
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 366,000 [3]   366,000 [3]   333,000 [6],[14]          
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 798,000 [3]   798,000 [3]   717,000 [6]          
Investment, Identifier [Axis]: Dragon Bidco, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[18]         2,585,000          
Investment, Identifier [Axis]: DreamStart Bidco SAS (d/b/a SmartTrade), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[18]         2,202,000          
Investment, Identifier [Axis]: Dryden 49 Senior Loan Fund, Series 2017-49A, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 218,000 [8],[13],[15]   218,000 [8],[13],[15]   437,000 [10],[14],[16]          
Investment, Identifier [Axis]: Dune Group, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[12],[18]         91,000          
Investment, Identifier [Axis]: Dune Group, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[10]         193,000          
Investment, Identifier [Axis]: Dune Group, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[10]         1,164,000          
Investment, Identifier [Axis]: Dunlipharder B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,000,000 [2],[3],[8],[21]   1,000,000 [2],[3],[8],[21]   998,000 [4],[5],[6],[10]          
Investment, Identifier [Axis]: Dwyer Instruments, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,459,000 [2],[3],[21]   14,459,000 [2],[3],[21]   14,433,000 [4],[5],[6]          
Investment, Identifier [Axis]: EB Development, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,005,000 [2],[3],[8],[11],[17]   2,005,000 [2],[3],[8],[11],[17]   1,971,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: EFC International, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 278,000 [3],[13]   278,000 [3],[13]   380,000 [6],[14]          
Investment, Identifier [Axis]: EFC International, Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 811,000 [3]   811,000 [3]   797,000 [6]          
Investment, Identifier [Axis]: EMI Porta Holdco LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,285,000 [2],[3],[21]   11,285,000 [2],[3],[21]   11,696,000 [4],[5],[6]          
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (80,000) [1],[2],[3],[11]   (80,000) [1],[2],[3],[11]   543,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: EZ SMBO Bidco, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8] 672,000   672,000              
Investment, Identifier [Axis]: EZ SMBO Bidco, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[44] 255,000   255,000              
Investment, Identifier [Axis]: EZ SMBO Bidco, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[17] 546,000   546,000              
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 276,000 [3],[13]   276,000 [3],[13]   417,000 [6],[14]          
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,958,000 [1],[2],[3]   8,958,000 [1],[2],[3]   9,450,000 [5],[6],[20]          
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 9,800,000   9,800,000   10,100,000          
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 units                    
Schedule of Investments [Line Items]                    
Fair Value 139,539,000   139,539,000   136,855,000 [46] 145,799,000 [46]        
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 139,539,000 [3]   139,539,000 [3]   136,855,000 [6]          
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 9,818,000 [1],[3],[11]   9,818,000 [1],[3],[11]   10,091,000 [6],[12],[20]          
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 9,818,000   9,818,000   10,091,000 [46] 5,545,000 [46]        
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,545,000 [3]   4,545,000 [3]   4,545,000 [6]          
Investment, Identifier [Axis]: Eclipse Business Capital, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,545,000   4,545,000   4,545,000 [46] 4,545,000 [46]        
Investment, Identifier [Axis]: Electric Equipment & Engineering Co., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 313,000 [3]   313,000 [3]   307,000 [6]          
Investment, Identifier [Axis]: Electric Equipment & Engineering Co., LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 276,000 [3],[13]   276,000 [3],[13]   188,000 [6],[14]          
Investment, Identifier [Axis]: Electrical Components International, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,380,000 [2],[3],[11],[21]   10,380,000 [2],[3],[11],[21]   10,410,000 [5],[6],[12],[23]          
Investment, Identifier [Axis]: Ellkay, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6]         4,348,000          
Investment, Identifier [Axis]: Entact Environmental Services, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,369,000 [2],[3],[21]   6,369,000 [2],[3],[21]   6,624,000 [4],[5],[6]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 742,000 [2],[3],[8],[24],[26]   742,000 [2],[3],[8],[24],[26]   831,000 [5],[6],[10],[25],[36]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 358,000 [2],[3],[8],[21],[24]   358,000 [2],[3],[8],[21],[24]   453,000 [4],[5],[6],[10],[36]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 1,148,000 [2],[3],[8],[24],[29]   1,148,000 [2],[3],[8],[24],[29]   1,165,000 [5],[6],[10],[30],[36]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[8],[24]   0 [3],[8],[24]   0 [6],[10],[36]          
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,416,000 [2],[3],[8],[11],[31]   1,416,000 [2],[3],[8],[11],[31]   1,336,000 [5],[6],[10],[12],[32]          
Investment, Identifier [Axis]: Expert Institute Group Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 2,552,000   2,552,000              
Investment, Identifier [Axis]: Expert Institute Group Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] (12,000)   (12,000)              
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,245,000 [2],[3],[21]   3,245,000 [2],[3],[21]   5,955,000 [4],[5],[6]          
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (2,000) [2],[3],[11],[21]   (2,000) [2],[3],[11],[21]   124,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: FL Hawk Intermediate Holdings, Inc. (f.k.a. Fineline Technologies, Inc.), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,968,000 [2],[3],[21]   11,968,000 [2],[3],[21]   11,950,000 [4],[5],[6]          
Investment, Identifier [Axis]: FSS Buyer LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,384,000 [2],[3],[21]   9,384,000 [2],[3],[21]   4,740,000 [5],[6],[20]          
Investment, Identifier [Axis]: FSS Buyer LLC, LP Interest                    
Schedule of Investments [Line Items]                    
Fair Value 17,000 [3]   17,000 [3]   17,000 [6]          
Investment, Identifier [Axis]: FSS Buyer LLC, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 74,000 [3],[13]   74,000 [3],[13]   74,000 [6],[14]          
Investment, Identifier [Axis]: Faraday, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,778,000 [2],[3],[8],[17]   1,778,000 [2],[3],[8],[17]   1,552,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Featherstone Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[27] 6,984,000   6,984,000              
Investment, Identifier [Axis]: Ferrellgas L.P., Opco Preferred Units                    
Schedule of Investments [Line Items]                    
Fair Value 2,799,000 [3]   2,799,000 [3]   2,799,000 [6]          
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings Inc., Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 6,717,000 [3]   6,717,000 [3]   5,608,000 [6]          
Investment, Identifier [Axis]: Finaxy Holding, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,347,000 [2],[3],[8],[26]   4,347,000 [2],[3],[8],[26]   3,872,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Finexvet, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,998,000 [2],[3],[8],[26]   4,998,000 [2],[3],[8],[26]   4,613,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: FitzMark Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,994,000 [1],[2],[3]   3,994,000 [1],[2],[3]   4,128,000 [5],[6],[20]          
Investment, Identifier [Axis]: Five Star Holding LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 756,000 [3],[13]   756,000 [3],[13]   564,000 [6],[14]          
Investment, Identifier [Axis]: Five Star Holding LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,595,000 [2],[3],[21]   13,595,000 [2],[3],[21]   13,198,000 [4],[5],[6]          
Investment, Identifier [Axis]: Flexential Issuer, LLC, Structured Secured Note - Class C                    
Schedule of Investments [Line Items]                    
Fair Value 10,805,000   10,805,000   15,339,000          
Investment, Identifier [Axis]: Flywheel Holdings Segregated Portfolio 2025-2, LP Interest                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 2,777,000   2,777,000              
Investment, Identifier [Axis]: Flywheel Re Segregated Portfolio 2022-4, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 4,808,000 [3],[8],[13]   4,808,000 [3],[8],[13]   3,875,000 [6],[10],[14]          
Investment, Identifier [Axis]: Footco 40 Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 246,000 [2],[3],[8],[17]   246,000 [2],[3],[8],[17]   217,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Footco 40 Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,741,000 [2],[3],[8],[11],[27]   1,741,000 [2],[3],[8],[11],[27]   1,588,000 [5],[6],[10],[12],[28]          
Investment, Identifier [Axis]: Forest Buyer, LLC, Class A LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 135,000 [3]   135,000 [3]   130,000 [6],[14]          
Investment, Identifier [Axis]: Forest Buyer, LLC, Class B LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 141,000 [3],[13]   141,000 [3],[13]   124,000 [6],[14]          
Investment, Identifier [Axis]: Forest Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,060,000 [2],[3],[21]   6,060,000 [2],[3],[21]   6,091,000 [4],[5],[6]          
Investment, Identifier [Axis]: Forest Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (2,000) [2],[3],[11],[21]   (2,000) [2],[3],[11],[21]   (2,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[12]         8,815,000          
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[12]         (9,000)          
Investment, Identifier [Axis]: FragilePak LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,520,000 [2],[3],[21]   4,520,000 [2],[3],[21]   4,544,000 [4],[5],[6]          
Investment, Identifier [Axis]: FragilePak LLC, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 752,000 [3],[13]   752,000 [3],[13]   767,000 [6],[14]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,108,000 [2],[3],[11],[21]   9,108,000 [2],[3],[11],[21]   9,129,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,490,000 [3]   1,490,000 [3]   1,350,000 [6]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 852,000 [2],[3],[11],[21]   852,000 [2],[3],[11],[21]   (23,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: GCDL LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 326,000 [3],[13]   326,000 [3],[13]   243,000 [6],[14]          
Investment, Identifier [Axis]: GCDL LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 528,000 [2],[3],[11],[21]   528,000 [2],[3],[11],[21]   529,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: GCDL LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (1,000) [2],[3],[11],[21]   (1,000) [2],[3],[11],[21]   (2,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: GPNZ II GmbH, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[8],[13]   0 [3],[8],[13]   0 [6],[10],[14]          
Investment, Identifier [Axis]: GPNZ II GmbH, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 380,000 [3],[8],[11]   380,000 [3],[8],[11]   271,000 [6],[10]          
Investment, Identifier [Axis]: GPNZ II GmbH, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 98,000 [3],[8]   98,000 [3],[8]   33,000 [5],[6],[10],[12]          
Investment, Identifier [Axis]: GPNZ II GmbH, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 81,000 [2],[3],[8],[24],[33]   81,000 [2],[3],[8],[24],[33]   189,000 [5],[6],[10],[34],[36]          
Investment, Identifier [Axis]: Global Academic Group Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,650,000 [2],[3],[8],[31]   2,650,000 [2],[3],[8],[31]   2,284,000 [5],[6],[10],[32]          
Investment, Identifier [Axis]: Global Academic Group Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 4,334,000 [2],[3],[8],[11],[47]   4,334,000 [2],[3],[8],[11],[47]   4,000,000 [5],[6],[10],[12],[48]          
Investment, Identifier [Axis]: Gojo Industries, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,676,000 [1],[2],[3]   12,676,000 [1],[2],[3]   12,883,000 [4],[5],[6]          
Investment, Identifier [Axis]: Graphpad Software, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,463,000 [2],[3],[11],[21]   9,463,000 [2],[3],[11],[21]   9,499,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Graphpad Software, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[11],[21]   0 [2],[3],[11],[21]   (1,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Greenhill II BV, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,093,000 [2],[3],[8],[17]   1,093,000 [2],[3],[8],[17]   936,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Groupe Guemas, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,406,000 [2],[3],[8],[26]   5,406,000 [2],[3],[8],[26]   4,747,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Groupe Product Life, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[12],[18]         871,000          
Investment, Identifier [Axis]: Groupe Product Life, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[11],[17] 128,000   128,000              
Investment, Identifier [Axis]: Groupe Product Life, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[11],[17] 866,000   866,000              
Investment, Identifier [Axis]: HEKA Invest, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,498,000 [2],[3],[8],[11],[17]   5,498,000 [2],[3],[8],[11],[17]   4,850,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: HS Advisory Buyer LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 1,935,000   1,935,000              
Investment, Identifier [Axis]: HS Advisory Buyer LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] (8,000)   (8,000)              
Investment, Identifier [Axis]: HSL Compliance, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[11],[27] 2,712,000   2,712,000              
Investment, Identifier [Axis]: HTI Technology & Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,197,000 [2],[3],[11],[22]   10,197,000 [2],[3],[11],[22]   10,421,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: HTI Technology & Industries, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (93,000) [2],[3],[11],[22]   (93,000) [2],[3],[11],[22]   (70,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,831,000 [2],[3],[21]   10,831,000 [2],[3],[21]   11,081,000 [4],[5],[6]          
Investment, Identifier [Axis]: Haystack Holdings LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[22] 6,529,000   6,529,000              
Investment, Identifier [Axis]: Haystack Holdings LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[22] (12,000)   (12,000)              
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 623,000 [2],[3],[8],[11],[31]   623,000 [2],[3],[8],[11],[31]   602,000 [5],[6],[10],[32]          
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,675,000 [3]   13,675,000 [3]   12,865,000 [6]          
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,184,000 [2],[3],[21]   7,184,000 [2],[3],[21]   7,221,000 [4],[5],[6]          
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[11],[21]   0 [2],[3],[11],[21]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Heilbron (f/k/a Sucsez (Bolt Bidco B.V.)), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,555,000 [2],[3],[8],[33]   3,555,000 [2],[3],[8],[33]   3,042,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: HemaSource, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 130,000 [3],[13]   130,000 [3],[13]   124,000 [6],[14]          
Investment, Identifier [Axis]: HemaSource, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,739,000 [1],[2],[3]   6,739,000 [1],[2],[3]   7,267,000 [5],[6],[20]          
Investment, Identifier [Axis]: HemaSource, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [1],[2],[3],[11]   0 [1],[2],[3],[11]   0 [5],[6],[12],[20]          
Investment, Identifier [Axis]: Herbalife Ltd., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,285,000 [1],[2],[8]   3,285,000 [1],[2],[8]   3,294,000 [5],[10],[20]          
Investment, Identifier [Axis]: Home Care Assistance, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,330,000 [2],[3],[21]   3,330,000 [2],[3],[21]   3,524,000 [4],[5],[6]          
Investment, Identifier [Axis]: HomeX Services Group LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,702,000 [2],[3],[11],[21]   1,702,000 [2],[3],[11],[21]   1,477,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: HomeX Services Group LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (2,000) [2],[3],[11],[21]   (2,000) [2],[3],[11],[21]   (3,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Honour Lane Logistics Holdings Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,667,000 [2],[3],[8],[22]   6,667,000 [2],[3],[8],[22]   6,645,000 [5],[6],[10],[23]          
Investment, Identifier [Axis]: Hydratech Holdings, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[12]         7,413,000          
Investment, Identifier [Axis]: Hydratech Holdings, Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 4,725,000   4,725,000              
Investment, Identifier [Axis]: Hydratech Holdings, Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 4,234,000   4,234,000              
Investment, Identifier [Axis]: Hydratech Holdings, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 429,000 [2],[3],[11],[21]   429,000 [2],[3],[11],[21]   265,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Hygie 31 Holding, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[25]         1,502,000          
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [46]         0 2,013,000        
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [46]         0 3,917,000        
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [46]         0 4,519,000        
Investment, Identifier [Axis]: ICREDITWORKS LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [3] 10,422,000   10,422,000              
Investment, Identifier [Axis]: ICREDITWORKS LLC, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 0   0              
Investment, Identifier [Axis]: IM Square, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,884,000 [2],[3],[8],[17]   2,884,000 [2],[3],[8],[17]   2,533,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: ISTO Technologies II, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,664,000 [2],[3],[21]   6,664,000 [2],[3],[21]   6,706,000 [5],[6],[23]          
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (2,000) [2],[3],[11],[21]   (2,000) [2],[3],[11],[21]   (2,000) [5],[6],[12],[23]          
Investment, Identifier [Axis]: ITI Intermodal, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 975,000 [3],[13]   975,000 [3],[13]   915,000 [6],[14]          
Investment, Identifier [Axis]: ITI Intermodal, Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 797,000 [2],[3],[21]   797,000 [2],[3],[21]   800,000 [5],[6],[23]          
Investment, Identifier [Axis]: ITI Intermodal, Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 12,017,000 [2],[3],[21]   12,017,000 [2],[3],[21]   12,079,000 [5],[6],[23]          
Investment, Identifier [Axis]: ITI Intermodal, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 226,000 [2],[3],[11],[21]   226,000 [2],[3],[11],[21]   225,000 [5],[6],[12],[23]          
Investment, Identifier [Axis]: Ice House America, L.L.C., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,399,000 [2],[3],[11],[21]   4,399,000 [2],[3],[11],[21]   4,482,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Ice House America, L.L.C., LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 237,000 [3],[13]   237,000 [3],[13]   316,000 [6],[14]          
Investment, Identifier [Axis]: Ice House America, L.L.C., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 373,000 [2],[3],[11],[21]   373,000 [2],[3],[11],[21]   186,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Infoniqa Holdings GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,085,000 [2],[3],[8],[17]   3,085,000 [2],[3],[8],[17]   2,721,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Innovad Group II BV, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 7,235,000 [2],[3],[8],[17]   7,235,000 [2],[3],[8],[17]   6,383,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Innovad Group II BV, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,152,000 [2],[3],[8],[49]   1,152,000 [2],[3],[8],[49]   1,012,000 [5],[6],[10],[50]          
Investment, Identifier [Axis]: Innovative XCessories & Services, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[16]         2,746,000          
Investment, Identifier [Axis]: Interstellar Group B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,742,000 [2],[3],[8],[11],[17]   1,742,000 [2],[3],[8],[11],[17]   1,509,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: InvoCare Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,088,000 [2],[3],[8],[11],[31]   2,088,000 [2],[3],[8],[11],[31]   1,963,000 [5],[6],[10],[12],[32]          
Investment, Identifier [Axis]: Isagenix International, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13],[15]   0 [3],[13],[15]   0 [6],[14],[16]          
Investment, Identifier [Axis]: Isagenix International, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 118,000 [2],[3],[15],[21]   118,000 [2],[3],[15],[21]   160,000 [4],[5],[6],[16]          
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,772,000 [2],[3],[8],[17]   5,772,000 [2],[3],[8],[17]   5,075,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Ivanti Software Inc, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[15],[21] 939,000   939,000              
Investment, Identifier [Axis]: Ivanti Software Inc, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[15],[21] 3,636,000   3,636,000              
Investment, Identifier [Axis]: Ivanti Software, Inc., Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[16]         3,285,000          
Investment, Identifier [Axis]: JF Acquisition, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6]         3,736,000          
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,262,000 [2],[3],[8],[26]   1,262,000 [2],[3],[8],[26]   1,112,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 6,526,000 [2],[3],[8],[22]   6,526,000 [2],[3],[8],[22]   6,579,000 [5],[6],[10],[23]          
Investment, Identifier [Axis]: JetBlue 2019-1 Class B Pass Through Trust, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 2,200,000   2,200,000   2,520,000          
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, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value [10],[12],[51]         40,761,000          
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 39,265,000 [8],[11],[52]   39,265,000 [8],[11],[52]   40,761,000 41,053,000        
Investment, Identifier [Axis]: Jon Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,031,000 [2],[3],[8],[11],[47]   4,031,000 [2],[3],[8],[11],[47]   3,720,000 [5],[6],[10],[12],[48]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,455,000 [2],[3],[22]   4,455,000 [2],[3],[22]   3,481,000 [4],[5],[6]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 476,000 [3],[13]   476,000 [3],[13]   372,000 [6]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (4,000) [2],[3],[11],[22]   (4,000) [2],[3],[11],[22]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Keystone Bidco B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 915,000 [2],[3],[8],[11],[26]   915,000 [2],[3],[8],[11],[26]   677,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Keystone Bidco B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 10,000 [2],[3],[8],[11],[26]   10,000 [2],[3],[8],[11],[26]   18,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,088,000 [2],[3],[21]   13,088,000 [2],[3],[21]   13,156,000 [4],[5],[6]          
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 797,000 [3],[13]   797,000 [3],[13]   772,000 [6],[14]          
Investment, Identifier [Axis]: Kline Hill Partners LP, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 47,000   47,000              
Investment, Identifier [Axis]: Kline Hill Partners LP, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 2,022,000   2,022,000              
Investment, Identifier [Axis]: Kline Hill Partners LP, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] (9,000)   (9,000)              
Investment, Identifier [Axis]: Kline Hill Partners LP, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[11] 2,217,000   2,217,000              
Investment, Identifier [Axis]: Lambir Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,295,000 [2],[3],[8],[11],[26]   2,295,000 [2],[3],[8],[11],[26]   1,952,000 [5],[6],[10],[12],[25]          
Investment, Identifier [Axis]: Lambir Bidco Limited, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,050,000 [3],[8]   2,050,000 [3],[8]   1,721,000 [6],[10]          
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[12],[23]         687,000          
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[11],[21] 738,000   738,000              
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[29] 158,000   158,000              
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 35,000 [2],[3],[8],[21]   35,000 [2],[3],[8],[21]   (1,000) [5],[6],[10],[12],[23]          
Investment, Identifier [Axis]: LeadsOnline, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,986,000 [2],[3],[21]   9,986,000 [2],[3],[21]   10,029,000 [4],[5],[6]          
Investment, Identifier [Axis]: LeadsOnline, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 202,000 [3],[13]   202,000 [3],[13]   180,000 [6]          
Investment, Identifier [Axis]: LeadsOnline, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (8,000) [2],[3],[11],[21]   (8,000) [2],[3],[11],[21]   (10,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Learfield Communications, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [6],[14]         4,085,000          
Investment, Identifier [Axis]: Learfield Communications, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,480,000 [1],[2]   5,480,000 [1],[2]   5,520,000 [5],[20]          
Investment, Identifier [Axis]: Legal Solutions Holdings, Senior Subordinated Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6],[36],[53]         0          
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 0   0              
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,721,000 [2],[3],[15],[21]   2,721,000 [2],[3],[15],[21]   2,812,000 [4],[5],[6],[16]          
Investment, Identifier [Axis]: Lockmasters Security Intermediate, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 9,342,000   9,342,000              
Investment, Identifier [Axis]: Lockmasters Security Intermediate, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] 80,000   80,000              
Investment, Identifier [Axis]: Long Term Care Group, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,327,000 [2],[3],[21]   8,327,000 [2],[3],[21]   7,839,000 [4],[5],[6]          
Investment, Identifier [Axis]: M-Personal Protection Management GMBH (f.k.a INOS 19-090 GmbH), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[18]         10,829,000          
Investment, Identifier [Axis]: M-Personal Protection Management GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[17] 12,590,000   12,590,000              
Investment, Identifier [Axis]: MB Purchaser, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,255,000 [2],[3],[11],[21]   3,255,000 [2],[3],[11],[21]   2,591,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: MB Purchaser, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 89,000 [3],[13]   89,000 [3],[13]   82,000 [6],[14]          
Investment, Identifier [Axis]: MB Purchaser, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (1,000) [2],[3],[11],[21]   (1,000) [2],[3],[11],[21]   (2,000) [5],[6],[12],[20]          
Investment, Identifier [Axis]: MC Group Ventures Corporation, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 4,785,000 [2],[3],[11],[21]   4,785,000 [2],[3],[11],[21]   4,899,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: MC Group Ventures Corporation, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 3,967,000 [2],[3],[11],[21]   3,967,000 [2],[3],[11],[21]   4,036,000 [5],[6],[12],[23]          
Investment, Identifier [Axis]: MC Group Ventures Corporation, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 526,000 [3],[13]   526,000 [3],[13]   681,000 [6],[14]          
Investment, Identifier [Axis]: MI OpCo Holdings, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[20]         6,320,000          
Investment, Identifier [Axis]: MNS Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 581,000 [1],[2],[3]   581,000 [1],[2],[3]   662,000 [4],[5],[6]          
Investment, Identifier [Axis]: MNS Buyer, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 112,000 [3],[13]   112,000 [3],[13]   106,000 [6],[14]          
Investment, Identifier [Axis]: MSI Express Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 5,478,000   5,478,000              
Investment, Identifier [Axis]: MSI Express Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 627,000   627,000              
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value [41]         0 9,762,000        
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Common Equity Interest                    
Schedule of Investments [Line Items]                    
Fair Value [6],[10],[14],[53]         13,741,000          
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Common Equity Interest                    
Schedule of Investments [Line Items]                    
Fair Value 11,995,000 [39]   11,995,000 [39]   13,741,000 [41] 15,430,000 [41]        
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Common Equity Interest                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13],[54] 11,995,000   11,995,000              
Investment, Identifier [Axis]: MVC Private Equity Fund LP, General Partnership Interest                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0 [10],[14],[53] 24,000        
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Limited Partnership Interest                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   11,000 [10],[14],[53] 981,000        
Investment, Identifier [Axis]: Magnetite XIX, Limited, Subordinated Notes                    
Schedule of Investments [Line Items]                    
Fair Value 5,128,000 [2],[8],[21]   5,128,000 [2],[8],[21]   10,500,000 [4],[6],[10],[16]          
Investment, Identifier [Axis]: Marmoutier Holding B.V., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [3],[8],[13] 0   0              
Investment, Identifier [Axis]: Marmoutier Holding B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 41,000 [2],[3],[8],[11],[17]   41,000 [2],[3],[8],[11],[17]   146,000 [5],[6],[10],[12],[25],[36]          
Investment, Identifier [Axis]: Marmoutier Holding B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 150,000 [2],[3],[8],[26]   150,000 [2],[3],[8],[26]   (53,000) [5],[6],[10],[12],[25],[36]          
Investment, Identifier [Axis]: Marmoutier Holding B.V., Super Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 164,000 [2],[3],[8],[26]   164,000 [2],[3],[8],[26]   185,000 [5],[6],[10],[36]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,751,000 [2],[3],[21]   1,751,000 [2],[3],[21]   1,747,000 [4],[5],[6]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 3,720,000 [2],[3],[42]   3,720,000 [2],[3],[42]   3,775,000 [5],[6],[43]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Revolver 1                    
Schedule of Investments [Line Items]                    
Fair Value 237,000 [2],[3],[11],[21]   237,000 [2],[3],[11],[21]   (9,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Revolver 2                    
Schedule of Investments [Line Items]                    
Fair Value (9,000) [2],[3],[11],[42]   (9,000) [2],[3],[11],[42]   (10,000) [5],[6],[12],[43]          
Investment, Identifier [Axis]: Median B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,910,000 [2],[8],[27]   9,910,000 [2],[8],[27]   8,966,000 [5],[10],[30]          
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc., Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,864,000 [2],[21]   1,864,000 [2],[21]   2,211,000 [4],[5]          
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   0 [6],[14]          
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,882,000 [2],[3],[21]   3,882,000 [2],[3],[21]   3,648,000 [4],[5],[6]          
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 96,000 [3],[13]   96,000 [3],[13]   46,000 [6],[14]          
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 132,000 [2],[3],[11],[21]   132,000 [2],[3],[11],[21]   108,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Mercell Holding AS, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 146,000 [3],[8],[13]   146,000 [3],[8],[13]   125,000 [6],[10],[14]          
Investment, Identifier [Axis]: Mercell Holding AS, Class B Units                    
Schedule of Investments [Line Items]                    
Fair Value 9,000 [3],[8],[13]   9,000 [3],[8],[13]   21,000 [6],[10],[14]          
Investment, Identifier [Axis]: Mercell Holding AS, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,102,000 [2],[3],[8],[11],[55]   3,102,000 [2],[3],[8],[11],[55]   2,750,000 [5],[6],[10],[12],[56]          
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[11],[57] 7,292,000   7,292,000              
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[12],[58]         7,008,000          
Investment, Identifier [Axis]: Momentum Textiles, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 7,243,000   7,243,000              
Investment, Identifier [Axis]: Momentum Textiles, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] (8,000)   (8,000)              
Investment, Identifier [Axis]: Moonlight Bidco Limited, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 209,000 [3],[8],[13]   209,000 [3],[8],[13]   182,000 [6],[10],[14]          
Investment, Identifier [Axis]: Moonlight Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,036,000 [2],[3],[8],[11],[27]   2,036,000 [2],[3],[8],[11],[27]   1,841,000 [5],[6],[10],[12],[28]          
Investment, Identifier [Axis]: Murphy Midco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,730,000 [2],[3],[8],[29]   1,730,000 [2],[3],[8],[29]   1,641,000 [5],[6],[10],[30]          
Investment, Identifier [Axis]: Music Reports, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,750,000 [2],[3],[21]   6,750,000 [2],[3],[21]   6,618,000 [4],[5],[6]          
Investment, Identifier [Axis]: NAW Buyer LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,790,000 [2],[3],[11],[21]   11,790,000 [2],[3],[11],[21]   11,850,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: NAW Buyer LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 515,000 [3]   515,000 [3]   524,000 [6]          
Investment, Identifier [Axis]: NAW Buyer LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[11],[21]   0 [2],[3],[11],[21]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: NF Holdco, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,151,000 [2],[3],[21]   6,151,000 [2],[3],[21]   6,283,000 [4],[5],[6]          
Investment, Identifier [Axis]: NF Holdco, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 377,000 [3],[13]   377,000 [3],[13]   563,000 [6],[14]          
Investment, Identifier [Axis]: NF Holdco, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 457,000 [2],[3],[11],[21]   457,000 [2],[3],[11],[21]   276,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: NPM Investments 28 B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,131,000 [2],[3],[8],[11],[17]   2,131,000 [2],[3],[8],[11],[17]   1,869,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Napa Bidco Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,187,000 [2],[3],[8],[31]   13,187,000 [2],[3],[8],[31]   12,459,000 [5],[6],[10],[32]          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Class A Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [6],[14]         578,000          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Class B Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [6],[14]         743,000          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[20]         5,074,000          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[12],[20]         0          
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,543,000 [1],[2],[3]   5,543,000 [1],[2],[3]   5,572,000 [5],[6],[20]          
Investment, Identifier [Axis]: NeoxCo, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,807,000 [2],[3],[8],[26]   2,807,000 [2],[3],[8],[26]   2,456,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Next Holdco, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 22,098,000 [2],[3],[11],[21]   22,098,000 [2],[3],[11],[21]   7,320,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Next Holdco, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (5,000) [2],[3],[11],[21]   (5,000) [2],[3],[11],[21]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Northstar Recycling, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,237,000 [2],[3],[11],[21]   8,237,000 [2],[3],[11],[21]   16,910,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Northstar Recycling, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (35,000) [2],[3],[11],[21]   (35,000) [2],[3],[11],[21]   (44,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: OA Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[20]         8,268,000          
Investment, Identifier [Axis]: OA Buyer, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [6]         783,000          
Investment, Identifier [Axis]: OA Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[12],[20]         (5,000)          
Investment, Identifier [Axis]: OAC Holdings I Corp, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,303,000 [2],[3],[21]   3,303,000 [2],[3],[21]   3,539,000 [5],[6],[20]          
Investment, Identifier [Axis]: OAC Holdings I Corp, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 724,000 [2],[3],[11],[21]   724,000 [2],[3],[11],[21]   0 [5],[6],[12],[20]          
Investment, Identifier [Axis]: OG III B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[18]         3,241,000          
Investment, Identifier [Axis]: OG III B.V., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[17] 2,233,000   2,233,000              
Investment, Identifier [Axis]: OG III B.V., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[17] 1,373,000   1,373,000              
Investment, Identifier [Axis]: ORS Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 4,916,000   4,916,000              
Investment, Identifier [Axis]: ORTEC INTERNATIONAL NEWCO B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,073,000 [2],[3],[8],[17]   1,073,000 [2],[3],[8],[17]   931,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 15,291,000 [2],[3],[11],[21]   15,291,000 [2],[3],[11],[21]   13,901,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 189,000 [3]   189,000 [3]   151,000 [6]          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 654,000 [2],[3],[11],[21]   654,000 [2],[3],[11],[21]   430,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,538,000 [3],[13]   1,538,000 [3],[13]   742,000 [6],[14]          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 3,054,000 [3]   3,054,000 [3]   2,873,000 [6]          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Super Senior Takeback Loan                    
Schedule of Investments [Line Items]                    
Fair Value 549,000 [3]   549,000 [3]   549,000 [5],[6]          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Takeback Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,933,000 [3]   2,933,000 [3]   2,933,000 [5],[6]          
Investment, Identifier [Axis]: Ocular Therapeutix, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,798,000 [1],[2],[3],[8]   4,798,000 [1],[2],[3],[8]   4,849,000 [5],[6],[10],[20]          
Investment, Identifier [Axis]: Offen Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,694,000 [1],[3],[15]   3,694,000 [1],[3],[15]   3,681,000 [6],[16],[20]          
Investment, Identifier [Axis]: Oracle Vision Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,083,000 [2],[3],[8],[29]   3,083,000 [2],[3],[8],[29]   2,802,000 [5],[6],[10],[30]          
Investment, Identifier [Axis]: Origin Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 342,000 [2],[3],[8],[17]   342,000 [2],[3],[8],[17]   301,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Origin Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 525,000 [2],[3],[8],[21]   525,000 [2],[3],[8],[21]   522,000 [4],[5],[6],[10]          
Investment, Identifier [Axis]: Owl Intermediate Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 7,751,000   7,751,000              
Investment, Identifier [Axis]: Owl Intermediate Holdings, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 38,000   38,000              
Investment, Identifier [Axis]: PDQ.Com Corporation, Class A-2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 32,000 [3]   32,000 [3]   42,000 [6],[14]          
Investment, Identifier [Axis]: PDQ.Com Corporation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,731,000 [2],[3],[11],[21]   14,731,000 [2],[3],[11],[21]   14,514,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 943,000 [2],[3],[8],[17]   943,000 [2],[3],[8],[17]   844,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,391,000 [2],[3],[8],[21]   1,391,000 [2],[3],[8],[21]   1,408,000 [4],[5],[6],[10]          
Investment, Identifier [Axis]: Panoche Energy Center LLC, First Lien Senior Secured Bond                    
Schedule of Investments [Line Items]                    
Fair Value 3,354,000 [3]   3,354,000 [3]   3,695,000 [6]          
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,898,000 [2],[3],[8],[17]   2,898,000 [2],[3],[8],[17]   2,688,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,500,000 [2],[3],[8],[21]   1,500,000 [2],[3],[8],[21]   1,500,000 [4],[5],[6],[10]          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[12],[20]         609,000          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3] 29,000   29,000              
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3] 593,000   593,000              
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 261,000 [3],[13]   261,000 [3],[13]   263,000 [6],[14]          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [3] 37,000   37,000              
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,114,000 [2],[3],[8],[17]   2,114,000 [2],[3],[8],[17]   2,045,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,397,000 [2],[3],[8],[21]   2,397,000 [2],[3],[8],[21]   2,628,000 [4],[5],[6],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class A                    
Schedule of Investments [Line Items]                    
Fair Value 180,000 [3],[8]   180,000 [3],[8]   177,000 [6],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 181,000 [3],[8]   181,000 [3],[8]   178,000 [6],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class C                    
Schedule of Investments [Line Items]                    
Fair Value 182,000 [3],[8]   182,000 [3],[8]   180,000 [6],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class D                    
Schedule of Investments [Line Items]                    
Fair Value 183,000 [3],[8]   183,000 [3],[8]   178,000 [6],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class E                    
Schedule of Investments [Line Items]                    
Fair Value 9,292,000 [3],[8]   9,292,000 [3],[8]   8,904,000 [6],[10]          
Investment, Identifier [Axis]: Permaconn BidCo Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,685,000 [2],[3],[8],[31]   2,685,000 [2],[3],[8],[31]   2,537,000 [5],[6],[10],[32]          
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 951,000 [1],[2],[3]   951,000 [1],[2],[3]   957,000 [4],[5],[6]          
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,741,000 [3]   1,741,000 [3]   1,229,000 [6]          
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 545,000 [1],[2],[3],[11]   545,000 [1],[2],[3],[11]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Policy Services Company, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 51,912,000 [2],[3],[21]   51,912,000 [2],[3],[21]   52,940,000 [4],[5],[6]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class A                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   1,262,000 [6],[14]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   426,000 [6],[14]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class CC                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   0 [6],[14]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class D                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   122,000 [6],[14]          
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   0 [6],[14]          
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 421,000 [1],[2],[3],[15],[24]   421,000 [1],[2],[3],[15],[24]   554,000 [5],[6],[16],[20],[36]          
Investment, Identifier [Axis]: PowerGEM Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,909,000 [2],[3],[11],[21]   8,909,000 [2],[3],[11],[21]   6,710,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: PowerGEM Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (20,000) [2],[3],[11],[21]   (20,000) [2],[3],[11],[21]   (26,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Premium Franchise Brands, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 7,353,000 [2],[3],[21]   7,353,000 [2],[3],[21]   7,377,000 [4],[5],[6]          
Investment, Identifier [Axis]: Premium Franchise Brands, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,710,000 [2],[3],[21]   2,710,000 [2],[3],[21]   2,694,000 [4],[5],[6]          
Investment, Identifier [Axis]: Premium Invest, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,849,000 [2],[3],[8],[11],[17]   9,849,000 [2],[3],[8],[11],[17]   8,750,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Preqin MC Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[23]         2,789,000          
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,642,000 [1],[2],[3]   7,642,000 [1],[2],[3]   7,662,000 [4],[5],[6]          
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 236,000 [3],[13]   236,000 [3],[13]   249,000 [6],[14]          
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 226,000 [1],[2],[3],[11]   226,000 [1],[2],[3],[11]   (28,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Process Equipment, Inc. (ProcessBarron), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,177,000 [2],[3],[22]   5,177,000 [2],[3],[22]   5,338,000 [5],[6],[23]          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 147,000 [3],[13]   147,000 [3],[13]   237,000 [6],[14]          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,285,000 [2],[3],[11],[21]   5,285,000 [2],[3],[11],[21]   5,134,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 506,000 [2],[3],[11],[21]   506,000 [2],[3],[11],[21]   889,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: ProfitOptics, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,604,000 [1],[2],[3]   1,604,000 [1],[2],[3]   1,613,000 [5],[6],[20]          
Investment, Identifier [Axis]: ProfitOptics, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 380,000 [3],[13]   380,000 [3],[13]   198,000 [6],[14]          
Investment, Identifier [Axis]: ProfitOptics, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 177,000 [1],[2],[3],[11]   177,000 [1],[2],[3],[11]   242,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: ProfitOptics, LLC, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 77,000 [3]   77,000 [3]   76,000 [6]          
Investment, Identifier [Axis]: Proppants Holding, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [6],[16]         0          
Investment, Identifier [Axis]: Protego Bidco B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,917,000 [2],[3],[8],[26]   1,917,000 [2],[3],[8],[26]   1,646,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Protego Bidco B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 2,299,000 [2],[3],[8],[26]   2,299,000 [2],[3],[8],[26]   1,974,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: QPE7 SPV1 BidCo Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,794,000 [2],[3],[8],[57]   1,794,000 [2],[3],[8],[57]   1,694,000 [5],[6],[10],[58]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 76,000 [3],[13]   76,000 [3],[13]   61,000 [6],[14]          
Investment, Identifier [Axis]: Qualified Industries, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,590,000 [2],[3],[21]   2,590,000 [2],[3],[21]   2,567,000 [5],[6],[23]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 184,000 [3],[13]   184,000 [3],[13]   175,000 [6],[14]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (1,000) [2],[3],[11],[21]   (1,000) [2],[3],[11],[21]   (5,000) [5],[6],[12],[23]          
Investment, Identifier [Axis]: Questel Unite, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[10]         7,059,000          
Investment, Identifier [Axis]: R1 Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,104,000 [2],[3],[22]   6,104,000 [2],[3],[22]   6,135,000 [5],[6],[20]          
Investment, Identifier [Axis]: R1 Holdings, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,854,000 [2],[3],[11],[22]   1,854,000 [2],[3],[11],[22]   472,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: RA Outdoors, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,799,000 [2],[3],[15],[22]   8,799,000 [2],[3],[15],[22]   12,732,000 [4],[5],[6],[16]          
Investment, Identifier [Axis]: RA Outdoors, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 841,000 [2],[3],[15],[22]   841,000 [2],[3],[15],[22]   1,217,000 [4],[5],[6],[16]          
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 3,118,000 [3],[13]   3,118,000 [3],[13]   4,595,000 [6],[14]          
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,610,000 [2],[3],[21]   2,610,000 [2],[3],[21]   1,015,000 [4],[5],[6]          
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, First Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,036,000 [2],[3],[21]   1,036,000 [2],[3],[21]   2,577,000 [4],[5],[6]          
Investment, Identifier [Axis]: RKD Group, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 12,068,000   12,068,000              
Investment, Identifier [Axis]: RKD Group, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] (12,000)   (12,000)              
Investment, Identifier [Axis]: ROI Solutions LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 17,978,000 [2],[3],[11],[22]   17,978,000 [2],[3],[11],[22]   17,973,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: ROI Solutions LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (41,000) [2],[3],[11],[22]   (41,000) [2],[3],[11],[22]   (55,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: RPX Corporation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 21,582,000 [1],[2],[3]   21,582,000 [1],[2],[3]   21,638,000 [4],[5],[6]          
Investment, Identifier [Axis]: RPX Corporation, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (32,000) [1],[2],[3],[11]   (32,000) [1],[2],[3],[11]   (39,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Class A Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13],[15]   0 [3],[13],[15]   0 [6],[14],[16]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Class B Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13],[15]   0 [3],[13],[15]   0 [6],[14],[16]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Class C Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 47,000 [3],[13],[15]   47,000 [3],[13],[15]   57,000 [6],[14],[16]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13],[15]   0 [3],[13],[15]   0 [6],[14],[16]          
Investment, Identifier [Axis]: Randys Holdings, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 677,000   677,000              
Investment, Identifier [Axis]: Randys Holdings, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,007,000 [2],[3],[11],[21]   12,007,000 [2],[3],[11],[21]   10,873,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Randys Holdings, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [6],[14]         622,000          
Investment, Identifier [Axis]: Randys Holdings, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,140,000 [2],[3],[11],[21]   1,140,000 [2],[3],[11],[21]   613,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Rapid Buyer LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,342,000 [2],[3],[11],[21]   5,342,000 [2],[3],[11],[21]   5,313,000 [5],[6],[12],[23]          
Investment, Identifier [Axis]: Rapid Buyer LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 486,000 [3],[13]   486,000 [3],[13]   533,000 [6],[14]          
Investment, Identifier [Axis]: Rapid Buyer LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (17,000) [2],[3],[11],[21]   (17,000) [2],[3],[11],[21]   (22,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Real Chemistry Intermediate III, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] 8,684,000   8,684,000              
Investment, Identifier [Axis]: Real Chemistry Intermediate III, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] (12,000)   (12,000)              
Investment, Identifier [Axis]: Recovery Point Systems, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,235,000 [2],[3],[21]   11,235,000 [2],[3],[21]   11,294,000 [4],[5],[6]          
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 88,000 [3],[13]   88,000 [3],[13]   81,000 [6],[14]          
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,389,000 [2],[3],[21]   4,389,000 [2],[3],[21]   4,308,000 [4],[5],[6]          
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 95,000 [3],[13]   95,000 [3],[13]   85,000 [6],[14]          
Investment, Identifier [Axis]: Resolute Investment Managers, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13],[15]   0 [3],[13],[15]   98,000 [6],[14],[16]          
Investment, Identifier [Axis]: Rhondda Financing No. 1 DAC, Structured - Junior Note                    
Schedule of Investments [Line Items]                    
Fair Value [6],[10],[12]         26,044,000          
Investment, Identifier [Axis]: Riedel Beheer B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,086,000 [2],[3],[8],[17]   2,086,000 [2],[3],[8],[17]   1,963,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Rocade Holdings LLC, Common LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,019,000 [3]   1,019,000 [3]   243,000 [6],[14],[46] 844,000 [46]        
Investment, Identifier [Axis]: Rocade Holdings LLC, Preferred LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 87,292,000 [3],[11],[21]   87,292,000 [3],[11],[21]   83,000,000 [4],[6],[12],[46] 73,113,000 [46]        
Investment, Identifier [Axis]: Rock Labor LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,426,000 [1],[2],[3]   6,426,000 [1],[2],[3]   6,426,000 [4],[5],[6]          
Investment, Identifier [Axis]: Rock Labor LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,062,000 [3]   1,062,000 [3]   1,127,000 [6]          
Investment, Identifier [Axis]: Rock Labor LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (13,000) [2],[3],[11],[21]   (13,000) [2],[3],[11],[21]   (19,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Royal Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,063,000 [2],[3],[21]   8,063,000 [2],[3],[21]   8,098,000 [4],[5],[6]          
Investment, Identifier [Axis]: Royal Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 117,000 [2],[3],[11],[21]   117,000 [2],[3],[11],[21]   (2,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6]         6,792,000          
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21],[24] 3,113,000   3,113,000              
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3] 6,000   6,000              
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] 331,000   331,000              
Investment, Identifier [Axis]: Russell Investments US Institutional Holdco, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 511,000 [2],[3],[21]   511,000 [2],[3],[21]   508,000 [4],[5],[6]          
Investment, Identifier [Axis]: SBP Holdings LP, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,631,000 [1],[2],[3],[11]   8,631,000 [1],[2],[3],[11]   8,648,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: SBP Holdings LP, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (8,000) [1],[2],[3],[11]   (8,000) [1],[2],[3],[11]   (13,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: SCP Medical Products, LLC., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 4,483,000   4,483,000              
Investment, Identifier [Axis]: SCP Medical Products, LLC., LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 53,000   53,000              
Investment, Identifier [Axis]: SCP Medical Products, LLC., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] (5,000)   (5,000)              
Investment, Identifier [Axis]: SISU ACQUISITIONCO., INC., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,702,000 [2],[3],[21]   6,702,000 [2],[3],[21]   6,591,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 258,000 [3],[13]   258,000 [3],[13]   280,000 [6],[14]          
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,064,000 [2],[3],[11],[21]   7,064,000 [2],[3],[11],[21]   6,990,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (16,000) [2],[3],[11],[21]   (16,000) [2],[3],[11],[21]   (18,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: SSCP Pegasus Midco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,673,000 [2],[3],[8],[11],[27]   6,673,000 [2],[3],[8],[11],[27]   4,368,000 [5],[6],[10],[12],[28]          
Investment, Identifier [Axis]: SSCP Spring Bidco 3 Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,035,000 [2],[3],[8],[29]   1,035,000 [2],[3],[8],[29]   941,000 [5],[6],[10],[30]          
Investment, Identifier [Axis]: SVI International LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 643,000 [2],[3],[11],[21]   643,000 [2],[3],[11],[21]   583,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: SVI International LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 316,000 [3]   316,000 [3]   277,000 [6]          
Investment, Identifier [Axis]: SVI International LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 40,000 [2],[3],[11],[21]   40,000 [2],[3],[11],[21]   (1,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Saab Purchaser, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,789,000 [2],[3],[11],[21]   8,789,000 [2],[3],[11],[21]   17,592,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Saab Purchaser, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 513,000 [2],[3],[11],[21]   513,000 [2],[3],[11],[21]   (24,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Safety Products Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,735,000 [2],[3],[21]   14,735,000 [2],[3],[21]   14,812,000 [4],[5],[6]          
Investment, Identifier [Axis]: Safety Products Holdings, LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 491,000 [3],[13]   491,000 [3],[13]   537,000 [6],[14]          
Investment, Identifier [Axis]: Sanoptis S.A.R.L., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 4,235,000 [2],[3],[8],[11],[26]   4,235,000 [2],[3],[8],[11],[26]   3,692,000 [5],[6],[10],[12],[25]          
Investment, Identifier [Axis]: Sanoptis S.A.R.L., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 3,250,000 [2],[3],[8],[59]   3,250,000 [2],[3],[8],[59]   2,788,000 [5],[6],[10],[50]          
Investment, Identifier [Axis]: Sanoptis S.A.R.L., First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[50]         46,000          
Investment, Identifier [Axis]: Sansidor BV, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 937,000 [2],[3],[8],[11],[17]   937,000 [2],[3],[8],[11],[17]   534,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Scaled Agile, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,542,000 [2],[3],[21]   1,542,000 [2],[3],[21]   1,605,000 [4],[5],[6]          
Investment, Identifier [Axis]: Scaled Agile, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 289,000 [2],[3],[21]   289,000 [2],[3],[21]   302,000 [4],[5],[6]          
Investment, Identifier [Axis]: Scout Bidco B.V., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 3,563,000 [2],[3],[8],[26]   3,563,000 [2],[3],[8],[26]   3,297,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Scout Bidco B.V., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 421,000 [2],[3],[8],[22]   421,000 [2],[3],[8],[22]   442,000 [4],[5],[6],[10]          
Investment, Identifier [Axis]: Scout Bidco B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 397,000 [2],[3],[8],[11],[26]   397,000 [2],[3],[8],[11],[26]   (14,000) [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Screenvision, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 5,106,000   5,106,000              
Investment, Identifier [Axis]: Screenvision, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] (12,000)   (12,000)              
Investment, Identifier [Axis]: Screenvision, LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 32,512,000   32,512,000              
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,823,000 [39]   6,823,000 [39]   6,655,000 [41] 6,328,000 [41]        
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series A                    
Schedule of Investments [Line Items]                    
Fair Value 491,000 [39]   491,000 [39]   399,000 [39] 311,000 [41]        
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series B                    
Schedule of Investments [Line Items]                    
Fair Value 45,928,000 [39]   45,928,000 [39]   37,296,000 [39] 29,080,000 [41]        
Investment, Identifier [Axis]: Security Holdings B.V, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 6,221,000 [39]   6,221,000 [39]   5,333,000 [39] 3,866,000 [41]        
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,387,000 [39]   11,387,000 [39]   11,191,000 [39] 10,867,000 [41]        
Investment, Identifier [Axis]: Security Holdings B.V, Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,778,000 [39]   2,778,000 [39]   2,293,000 [39] 2,236,000 [41]        
Investment, Identifier [Axis]: Security Holdings B.V., Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,823,000 [3],[8],[54]   6,823,000 [3],[8],[54]   6,655,000 [6],[10],[53]          
Investment, Identifier [Axis]: Security Holdings B.V., Common Stock Series A                    
Schedule of Investments [Line Items]                    
Fair Value 491,000 [3],[8],[13],[54]   491,000 [3],[8],[13],[54]   399,000 [6],[10],[14],[53]          
Investment, Identifier [Axis]: Security Holdings B.V., Common Stock Series B                    
Schedule of Investments [Line Items]                    
Fair Value 45,928,000 [3],[8],[54]   45,928,000 [3],[8],[54]   37,296,000 [6],[10],[14],[53]          
Investment, Identifier [Axis]: Security Holdings B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 6,221,000 [3],[8],[11],[54]   6,221,000 [3],[8],[11],[54]   5,333,000 [6],[10],[12],[53]          
Investment, Identifier [Axis]: Security Holdings B.V., Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,387,000 [3],[8],[54]   11,387,000 [3],[8],[54]   11,191,000 [6],[10],[53]          
Investment, Identifier [Axis]: Security Holdings B.V., Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,778,000 [3],[8],[54]   2,778,000 [3],[8],[54]   2,293,000 [6],[10],[53]          
Investment, Identifier [Axis]: Selenium Designated Activity Company, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[26] 3,159,000   3,159,000              
Investment, Identifier [Axis]: Sereni Capital NV, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[25]         903,000          
Investment, Identifier [Axis]: Sereni Capital NV, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[10],[25]         1,524,000          
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 884,000 [13]   884,000 [13]   655,000 [14]          
Investment, Identifier [Axis]: Shelf Bidco Ltd, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 4,572,000 [3],[8]   4,572,000 [3],[8]   4,668,000 [6],[10]          
Investment, Identifier [Axis]: Shelf Bidco Ltd, Second Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,098,000 [2],[3],[8],[21]   12,098,000 [2],[3],[8],[21]   12,153,000 [4],[5],[6],[10]          
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value [10],[16],[51]         41,453,000          
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 39,555,000 [8],[15],[52]   39,555,000 [8],[15],[52]   41,453,000 39,172,000        
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, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,139,000 [2],[3],[8],[11],[17]   2,139,000 [2],[3],[8],[11],[17]   1,858,000 [5],[6],[10],[12],[25]          
Investment, Identifier [Axis]: Skyvault Holdings LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,320,000 [3],[11]   12,320,000 [3],[11]   3,586,000 [6],[12]          
Investment, Identifier [Axis]: Skyvault Holdings LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,320,000   12,320,000   3,586,000 [46] 0 [46]        
Investment, Identifier [Axis]: Skyvault Holdings LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 4,046,000 [3],[13]   4,046,000 [3],[13]   1,195,000 [6],[14]          
Investment, Identifier [Axis]: Skyvault Holdings LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 4,046,000   4,046,000   1,195,000 [46] 0 [46]        
Investment, Identifier [Axis]: SmartShift Group, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 581,000 [3],[13]   581,000 [3],[13]   483,000 [6],[14]          
Investment, Identifier [Axis]: SmartShift Group, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,879,000 [2],[3],[22]   12,879,000 [2],[3],[22]   12,944,000 [4],[5],[6]          
Investment, Identifier [Axis]: SmartShift Group, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[11],[22]   0 [2],[3],[11],[22]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Smartling, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,383,000 [2],[3],[22]   10,383,000 [2],[3],[22]   10,437,000 [4],[5],[6]          
Investment, Identifier [Axis]: Smartling, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[11],[22]   0 [2],[3],[11],[22]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Smile Brands Group Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 4,558,000   4,558,000              
Investment, Identifier [Axis]: Smile Brands Group Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6]         1,230,000          
Investment, Identifier [Axis]: Smile Brands Group Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6]         3,477,000          
Investment, Identifier [Axis]: Solo Buyer, L.P., Common Equity                    
Schedule of Investments [Line Items]                    
Fair Value 310,000 [3],[13]   310,000 [3],[13]   325,000 [6],[14]          
Investment, Identifier [Axis]: Solo Buyer, L.P., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,782,000 [2],[3],[21]   14,782,000 [2],[3],[21]   14,826,000 [4],[5],[6]          
Investment, Identifier [Axis]: Solo Buyer, L.P., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 736,000 [2],[3],[11],[21]   736,000 [2],[3],[11],[21]   466,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Sonicwall US Holdings Inc, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[21] 2,836,000   2,836,000              
Investment, Identifier [Axis]: Sound Point CLO XX, Ltd., Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 19,000 [8],[13],[15]   19,000 [8],[13],[15]   61,000 [10],[14],[16]          
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,288,000 [2],[3],[21]   2,288,000 [2],[3],[21]   2,057,000 [5],[6],[12],[23]          
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[11],[21]   0 [2],[3],[11],[21]   (1,000) [5],[6],[12],[23]          
Investment, Identifier [Axis]: Spatial Business Systems LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,840,000 [1],[2],[3]   14,840,000 [1],[2],[3]   14,706,000 [4],[5],[6]          
Investment, Identifier [Axis]: Spatial Business Systems LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [1],[2],[3],[11]   0 [1],[2],[3],[11]   (21,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Starnmeer B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,469,000 [2],[3],[8],[22]   2,469,000 [2],[3],[8],[22]   2,500,000 [5],[6],[10],[23]          
Investment, Identifier [Axis]: Superjet Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[12]         17,712,000          
Investment, Identifier [Axis]: Superjet Buyer, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 13,431,000   13,431,000              
Investment, Identifier [Axis]: Superjet Buyer, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 4,557,000   4,557,000              
Investment, Identifier [Axis]: Superjet Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (30,000) [2],[3],[11],[21]   (30,000) [2],[3],[11],[21]   (38,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Swoop Intermediate III, Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] 7,662,000   7,662,000              
Investment, Identifier [Axis]: Swoop Intermediate III, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] (9,000)   (9,000)              
Investment, Identifier [Axis]: Syniverse Holdings, Inc., Series A Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value 10,758,000 [3]   10,758,000 [3]   10,076,000 [6]          
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 91,000 [3],[13]   91,000 [3],[13]   84,000 [6],[14]          
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,969,000 [3]   2,969,000 [3]   2,785,000 [6]          
Investment, Identifier [Axis]: TAPCO Buyer LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,585,000 [2],[3],[11],[21]   13,585,000 [2],[3],[11],[21]   13,517,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: TAPCO Buyer LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 302,000 [3],[13]   302,000 [3],[13]   252,000 [6],[14]          
Investment, Identifier [Axis]: TAPCO Buyer LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (35,000) [2],[3],[11],[21]   (35,000) [2],[3],[11],[21]   (44,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: THG Acquisition, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,820,000 [1],[2],[3],[11]   4,820,000 [1],[2],[3],[11]   10,187,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: THG Acquisition, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 101,000 [1],[2],[3],[11]   101,000 [1],[2],[3],[11]   97,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,572,000 [2],[3],[21]   2,572,000 [2],[3],[21]   2,572,000 [4],[5],[6]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,145,000 [2],[3],[21]   2,145,000 [2],[3],[21]   953,000 [4],[5],[6]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 9,307,000 [2],[3],[11],[21]   9,307,000 [2],[3],[11],[21]   1,192,000 [4],[5],[6]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 4                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[12]         7,837,000          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 29,000 [3]   29,000 [3]   26,000 [6]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (2,000) [2],[3],[11],[21]   (2,000) [2],[3],[11],[21]   (4,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Tank Holding Corp, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 7,787,000 [1],[2],[3]   7,787,000 [1],[2],[3]   7,792,000 [5],[6],[23]          
Investment, Identifier [Axis]: Tank Holding Corp, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,994,000 [1],[2],[3]   2,994,000 [1],[2],[3]   2,868,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: Tank Holding Corp, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (10,000) [1],[2],[3],[11]   (10,000) [1],[2],[3],[11]   (12,000) [5],[6],[12],[23]          
Investment, Identifier [Axis]: Tanqueray Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,802,000 [2],[3],[8],[11],[27]   1,802,000 [2],[3],[8],[11],[27]   1,643,000 [5],[6],[10],[12],[28]          
Investment, Identifier [Axis]: Team Air Distributing, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [6]         35,000          
Investment, Identifier [Axis]: Team Air Distributing, LLC, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 537,000 [3],[13]   537,000 [3],[13]   625,000 [6],[14]          
Investment, Identifier [Axis]: Team Air Distributing, LLC, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 740,000 [3]   740,000 [3]   702,000 [6]          
Investment, Identifier [Axis]: Technology Service Stream BidCo Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 775,000 [2],[3],[8],[11],[31]   775,000 [2],[3],[8],[11],[31]   677,000 [5],[6],[10],[12],[19]          
Investment, Identifier [Axis]: Techone B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,125,000 [2],[3],[8],[17]   4,125,000 [2],[3],[8],[17]   3,609,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Techone B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[8],[11],[17]   0 [2],[3],[8],[11],[17]   (4,000) [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,032,000 [2],[3],[11],[21]   14,032,000 [2],[3],[11],[21]   8,364,000 [4],[5],[6]          
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (26,000) [2],[3],[11],[21]   (26,000) [2],[3],[11],[21]   (18,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Terrybear, Inc., Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 0 [3],[13]   0 [3],[13]   120,000 [6],[14]          
Investment, Identifier [Axis]: Terrybear, Inc., Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 264,000 [3]   264,000 [3]   268,000 [6]          
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,689,000 [2],[3],[11],[21]   13,689,000 [2],[3],[11],[21]   2,647,000 [4],[5],[6]          
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (23,000) [2],[3],[11],[21]   (23,000) [2],[3],[11],[21]   0 [4],[5],[6],[12]          
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[23]         3,791,000          
Investment, Identifier [Axis]: The Octave Music Group, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,434,000 [2],[21]   3,434,000 [2],[21]   3,595,000 [4],[5]          
Investment, Identifier [Axis]: The Octave Music Group, Inc., Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 2,037,000 [3],[13]   2,037,000 [3],[13]   2,180,000 [6]          
Investment, Identifier [Axis]: Thompson Rivers LLC                    
Schedule of Investments [Line Items]                    
Total contributed capital                   $ 75,000,000
Investment, Identifier [Axis]: Thompson Rivers LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value [14],[51]         7,208,000          
Investment, Identifier [Axis]: Thompson Rivers LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 5,534,000 [13],[52]   5,534,000 [13],[52]   7,208,000 13,365,000        
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]: Transportation Insight, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,168,000 [2],[3],[21]   8,168,000 [2],[3],[21]   8,518,000 [4],[5],[6]          
Investment, Identifier [Axis]: Trident Maritime Systems, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,507,000 [2],[3],[21]   13,507,000 [2],[3],[21]   14,420,000 [4],[5],[6]          
Investment, Identifier [Axis]: Trintech, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,786,000 [1],[2],[3]   6,786,000 [1],[2],[3]   6,787,000 [5],[6],[20]          
Investment, Identifier [Axis]: Trintech, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 147,000 [1],[2],[3],[11]   147,000 [1],[2],[3],[11]   145,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: True Religion Apparel, Inc., Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value [6],[14],[16]         0          
Investment, Identifier [Axis]: Turbo Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,666,000 [2],[3],[21]   7,666,000 [2],[3],[21]   7,754,000 [4],[5],[6]          
Investment, Identifier [Axis]: Turnberry Solutions, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,849,000 [1],[2],[3]   4,849,000 [1],[2],[3]   4,874,000 [5],[6],[20]          
Investment, Identifier [Axis]: UBC Ledgers Holding AB, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 769,000 [2],[3],[8],[17]   769,000 [2],[3],[8],[17]   536,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: UBC Ledgers Holding AB, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,681,000 [2],[3],[8],[11],[60]   1,681,000 [2],[3],[8],[11],[60]   1,450,000 [5],[6],[10],[12],[35]          
Investment, Identifier [Axis]: UHY Advisors, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,811,000 [2],[3],[11],[21]   7,811,000 [2],[3],[11],[21]   12,982,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: UHY Advisors, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[11],[21]   0 [2],[3],[11],[21]   (35,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: UKFast Leaders Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,209,000 [2],[3],[8],[27]   12,209,000 [2],[3],[8],[27]   11,041,000 [5],[6],[10],[28]          
Investment, Identifier [Axis]: US Bank National Association Series 2025-1, Structured Note - Class R                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[8],[21] 6,560,000   6,560,000              
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 12,431,000 [2],[3],[21]   12,431,000 [2],[3],[21]   12,487,000 [4],[5],[6]          
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 5,389,000 [2],[3],[21]   5,389,000 [2],[3],[21]   5,411,000 [4],[5],[6]          
Investment, Identifier [Axis]: Union Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,087,000 [2],[3],[8],[11],[27]   1,087,000 [2],[3],[8],[11],[27]   930,000 [5],[6],[10],[12],[30]          
Investment, Identifier [Axis]: United Therapy Holding III GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,534,000 [2],[3],[8],[11],[26]   1,534,000 [2],[3],[8],[11],[26]   1,204,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Unither (Uniholding), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,225,000 [2],[3],[8],[11],[17]   2,225,000 [2],[3],[8],[11],[17]   1,962,000 [5],[6],[10],[12],[18]          
Investment, Identifier [Axis]: Unosquare, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] 6,039,000   6,039,000              
Investment, Identifier [Axis]: Unosquare, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 261,000   261,000              
Investment, Identifier [Axis]: Unosquare, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [1],[2],[3],[11] (20,000)   (20,000)              
Investment, Identifier [Axis]: Utac Ceram, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,792,000 [2],[3],[8],[17]   1,792,000 [2],[3],[8],[17]   1,500,000 [5],[6],[10],[18]          
Investment, Identifier [Axis]: Utac Ceram, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 3,558,000 [2],[3],[8],[21]   3,558,000 [2],[3],[8],[21]   2,471,000 [4],[5],[6],[10]          
Investment, Identifier [Axis]: Utac Ceram, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[10]         943,000          
Investment, Identifier [Axis]: VB Spine Intermediary II LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[21] 43,527,000   43,527,000              
Investment, Identifier [Axis]: VB Spine Intermediary II LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [3],[13] 0   0              
Investment, Identifier [Axis]: VOYA CLO 2015-2, LTD., Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 51,000 [8],[13],[15]   51,000 [8],[13],[15]   15,000 [10],[14],[16]          
Investment, Identifier [Axis]: VOYA CLO 2016-2, LTD., Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 7,000 [8],[13],[15]   7,000 [8],[13],[15]   1,072,000 [10],[14],[16]          
Investment, Identifier [Axis]: Validity, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[20]         4,783,000          
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 2,000 [3],[13],[15]   2,000 [3],[13],[15]   2,000 [6],[14],[16]          
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value 3,000 [3],[13],[15]   3,000 [3],[13],[15]   3,000 [6],[14],[16]          
Investment, Identifier [Axis]: Victoria Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,071,000 [2],[3],[8],[29]   4,071,000 [2],[3],[8],[29]   3,787,000 [5],[6],[10],[30]          
Investment, Identifier [Axis]: Vision Solutions Inc., Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,988,000 [2],[15],[21]   5,988,000 [2],[15],[21]   6,256,000 [4],[5],[16]          
Investment, Identifier [Axis]: Vista Global Holding Ltd, Structured Secured Note - Class C                    
Schedule of Investments [Line Items]                    
Fair Value 493,000 [8]   493,000 [8]   495,000 [6],[10]          
Investment, Identifier [Axis]: VistaJet Pass Through Trust 2021-1B, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 2,759,000   2,759,000   3,160,000 [6]          
Investment, Identifier [Axis]: Vital Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 17,814,000 [2],[3],[21]   17,814,000 [2],[3],[21]   7,241,000 [4],[5],[6]          
Investment, Identifier [Axis]: Vital Buyer, LLC, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 395,000 [3]   395,000 [3]   388,000 [6]          
Investment, Identifier [Axis]: W2O Holdings, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6]         11,772,000          
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 10,750,000   10,750,000              
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[12]         2,502,000          
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6]         5,959,000          
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6],[12]         1,816,000          
Investment, Identifier [Axis]: WWEC Holdings III Corp, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,003,000 [2],[3],[21]   12,003,000 [2],[3],[21]   12,050,000 [4],[5],[6]          
Investment, Identifier [Axis]: WWEC Holdings III Corp, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (32,000) [2],[3],[11],[21]   (32,000) [2],[3],[11],[21]   (35,000) [4],[5],[6],[12]          
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, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value [10],[51]         10,730,000          
Investment, Identifier [Axis]: Waccamaw River LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 7,128,000 [8],[52]   7,128,000 [8],[52]   10,730,000 $ 15,470,000        
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,966,000 [2],[3],[11],[21]   2,966,000 [2],[3],[11],[21]   1,802,000 [4],[5],[6]          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 8,482,000 [2],[3],[21]   8,482,000 [2],[3],[21]   (36,000) [4],[5],[6],[12]          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [5],[6],[20]         8,525,000          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 972,000 [3],[13]   972,000 [3],[13]   975,000 [6],[14]          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 352,000 [2],[3],[11],[21]   352,000 [2],[3],[11],[21]   993,000 [5],[6],[12],[20]          
Investment, Identifier [Axis]: White Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,742,000 [2],[3],[8],[11],[21]   1,742,000 [2],[3],[8],[11],[21]   1,747,000 [4],[5],[6],[10],[12]          
Investment, Identifier [Axis]: Woodland Foods, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,481,000 [3],[13]   1,481,000 [3],[13]   1,271,000 [6],[14]          
Investment, Identifier [Axis]: Woodland Foods, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 15,493,000 [2],[3],[11],[21]   15,493,000 [2],[3],[11],[21]   6,097,000 [4],[5],[6]          
Investment, Identifier [Axis]: Woodland Foods, LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [6]         427,000          
Investment, Identifier [Axis]: Woodland Foods, LLC, Preferred Stock 1                    
Schedule of Investments [Line Items]                    
Fair Value [3] 470,000   470,000              
Investment, Identifier [Axis]: Woodland Foods, LLC, Preferred Stock 2                    
Schedule of Investments [Line Items]                    
Fair Value [3] 130,000   130,000              
Investment, Identifier [Axis]: Woodland Foods, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 507,000 [2],[3],[11],[21]   507,000 [2],[3],[11],[21]   1,043,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: World 50, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,827,000 [2],[3],[21]   13,827,000 [2],[3],[21]   13,785,000 [5],[6],[20]          
Investment, Identifier [Axis]: World 50, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [2],[3],[11],[21]   0 [2],[3],[11],[21]   (8,000) [5],[6],[12],[20]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 626,000 [3],[8],[13]   626,000 [3],[8],[13]   572,000 [6],[10],[14]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 327,000 [2],[3],[8],[26]   327,000 [2],[3],[8],[26]   283,000 [5],[6],[10],[25]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 9,605,000 [2],[3],[8],[11],[29]   9,605,000 [2],[3],[8],[11],[29]   8,598,000 [5],[6],[10],[30]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,117,000 [3],[8]   4,117,000 [3],[8]   3,691,000 [6],[10]          
Investment, Identifier [Axis]: ZB Holdco LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[6]         9,053,000          
Investment, Identifier [Axis]: ZB Holdco LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] 9,428,000   9,428,000              
Investment, Identifier [Axis]: ZB Holdco LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [2],[3],[11],[21] (22,000)   (22,000)              
Investment, Identifier [Axis]: ZB Holdco LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 223,000 [3],[13]   223,000 [3],[13]   197,000 [6],[14]          
Investment, Identifier [Axis]: ZB Holdco LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 904,000 [2],[3],[11],[21]   904,000 [2],[3],[11],[21]   495,000 [4],[5],[6],[12]          
Investment, Identifier [Axis]: Zeppelin Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,613,000 [2],[3],[8],[24],[29]   2,613,000 [2],[3],[8],[24],[29]   4,691,000 [5],[6],[10],[30]          
Investment, Identifier [Axis]: eShipping, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,135,000 [1],[2],[3]   3,135,000 [1],[2],[3]   3,465,000 [5],[6],[20]          
Investment, Identifier [Axis]: eShipping, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value $ 0 [1],[2],[3],[11]   $ 0 [1],[2],[3],[11]   $ 0 [5],[6],[12],[20]          
[1] The interest rate on these loans is subject to 1 Month SOFR, which as of June 30, 2025 was 4.32229%.
[2] Debt investment includes interest rate floor feature.
[3] The fair value of the investment was determined using significant unobservable inputs.
[4] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2024 was 4.30510%.
[5] Debt investment includes interest rate floor feature.
[6] The fair value of the investment was determined using significant unobservable inputs.
[7] PIK non-accrual investment.
[8] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 24.4% of total investments at fair value as of June 30, 2025. 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] PIK non-accrual investment.
[10] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 26.1% of total investments at fair value as of December 31, 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).
[11] Position or portion thereof is an unfunded loan or equity commitment.
[12] Position or portion thereof is an unfunded loan or equity commitment.
[13] Investment is non-income producing.
[14] Investment is non-income producing.
[15] 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.
[16] Investment was purchased as part of the Sierra Merger and is part of the Sierra Reference Portfolio for purposes of the Sierra Credit Support Agreement.
[17] The interest rate on these loans is subject to 3 Month EURIBOR, which as of June 30, 2025 was 1.94400%.
[18] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2024 was 2.71400%.
[19] The interest rate on these loans is subject to 6 Month BBSY, which as of December 31, 2024 was 4.49250%.
[20] The interest rate on these loans is subject to 1 Month SOFR, which as of December 31, 2024 was 4.33249%.
[21] The interest rate on these loans is subject to 3 Month SOFR, which as of June 30, 2025 was 4.29235%.
[22] The interest rate on these loans is subject to 6 Month SOFR, which as of June 30, 2025 was 4.14656%.
[23] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2024 was 4.25001%.
[24] Non-accrual investment.
[25] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2024 was 2.56800%.
[26] The interest rate on these loans is subject to 6 Month EURIBOR, which as of June 30, 2025 was 2.04900%.
[27] The interest rate on these loans is subject to 3 Month SONIA, which as of June 30, 2025 was 4.10460%.
[28] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2024 was 4.62330%.
[29] The interest rate on these loans is subject to 6 Month SONIA, which as of June 30, 2025 was 3.99300%.
[30] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2024 was 4.56370%.
[31] The interest rate on these loans is subject to 3 Month BBSY, which as of June 30, 2025 was 3.60370%.
[32] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2024 was 4.41630%.
[33] The interest rate on these loans is subject to 1 Month EURIBOR, which as of June 30, 2025 was 1.93400%.
[34] The interest rate on these loans is subject to 1 Month EURIBOR, which as of December 31, 2024 was 2.84500%.
[35] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2024 was 2.54200%.
[36] Non-accrual investment.
[37] Non-accrual investment.
[38] Non-accrual investment.
[39] The fair value of the investment was determined using significant unobservable inputs.
[40] Non-accrual investment.
[41] The fair value of the investment was determined using significant unobservable inputs.
[42] The interest rate on these loans is subject to 1 Month SONIA, which as of June 30, 2025 was 4.22390%.
[43] The interest rate on these loans is subject to 1 Month SONIA, which as of December 31, 2024 was 4.71030%.
[44] The interest rate on these loans is subject to 3 Month CORRA, which as of June 30, 2025 was 2.75000%.
[45] The interest rate on these loans is subject to 3 Month CORRA, which as of December 31, 2024 was 3.15158%.
[46] The fair value of the investment was determined using significant unobservable inputs.
[47] The interest rate on these loans is subject to 3 Month BKBM, which as of June 30, 2025 was 3.30000%.
[48] The interest rate on these loans is subject to 3 Month BKBM, which as of December 31, 2024 was 4.27000%.
[49] The interest rate on these loans is subject to 3 Month SARON, which as of June 30, 2025 was 0.17170%
[50] The interest rate on these loans is subject to 6 Month SARON, which as of December 31, 2024 was 1.01720%.
[51] Portfolio company does not issue shares or units, member interest is based on commitments.
[52] Portfolio company does not issue shares or units, member interest is based on commitments.
[53] 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.
[54] Investment was purchased from MVC Capital, Inc. (“MVC”) in connection with the MVC Acquisition (as defined in “Note 2 - Agreements and Related Party Transactions”).
[55] The interest rate on these loans is subject to 1 Month NIBOR, which as of June 30, 2025 was 4.31000%.
[56] The interest rate on these loans is subject to 1 Month NIBOR, which as of December 31, 2024 was 4.61000%.
[57] The interest rate on these loans is subject to 1 Month BBSY, which as of June 30, 2025 was 3.61250%.
[58] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2024 was 4.32250%.
[59] The interest rate on these loans is subject to 6 Month SARON, which as of June 30, 2025 was -0.03173%.
[60] The interest rate on these loans is subject to 3 Month STIBOR, which as of June 30, 2025 was 2.12700%.