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INVESTMENTS - Thompson Rivers LLC (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2025
USD ($)
loan
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
loan
Sep. 30, 2024
USD ($)
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 $ 14,177,000 $ 9,841,000 $ 39,512,000 $ 30,051,000            
Fair Value 2,536,315,000 [1]   2,536,315,000 [1]   $ 2,449,272,000 [2]          
Thompson Rivers LLC                    
Schedule of Investments [Line Items]                    
Total dividend income 0 0 0 0            
Distributions recognized as a return of capital 800,000 1,100,000 2,400,000 4,700,000            
Fair Value $ 124,689,000   $ 124,689,000   $ 193,351,000          
Investment owned, outstanding loans | loan 782   782   1,243          
Investment owned, average unpaid balance $ 200,000   $ 200,000   $ 200,000          
Investment owned, weighted average yield rate 4.00%   4.00%   4.00%          
Thompson Rivers LLC | JPMorgan Chase Bank                    
Schedule of Investments [Line Items]                    
Repurchase agreement counterparty, amount at risk $ 30,900,000   $ 30,900,000   $ 43,500,000          
Thompson Rivers LLC | Bank of America N.A.,                    
Schedule of Investments [Line Items]                    
Repurchase agreement counterparty, amount at risk 77,100,000   77,100,000   90,300,000          
Thompson Rivers LLC | Barclays Bank                    
Schedule of Investments [Line Items]                    
Repurchase agreement counterparty, amount at risk         28,700,000          
Thompson Rivers LLC | Ginnie Mae Early Buyout Loans                    
Schedule of Investments [Line Items]                    
Fair Value 124,700,000   124,700,000   193,400,000          
Thompson Rivers LLC | Cash and Cash Equivalents                    
Schedule of Investments [Line Items]                    
Fair Value 9,000,000   9,000,000   7,100,000          
Thompson Rivers LLC                    
Schedule of Investments [Line Items]                    
Total contributed capital 450,000,000   450,000,000              
Dividends 5,000,000 $ 7,000,000 15,000,000.0 $ 29,500,000            
Investment, Identifier [Axis]: 1WorldSync, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         7,049,000          
Investment, Identifier [Axis]: A.T. Holdings II LTD, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,805,000 [6],[7],[8]   7,805,000 [6],[7],[8]   8,479,000 [5],[9],[10]          
Investment, Identifier [Axis]: AD Bidco, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,982,000 [8],[11],[12],[13]   12,982,000 [8],[11],[12],[13]   10,099,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: AD Bidco, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (16,000) [8],[11],[12],[13]   (16,000) [8],[11],[12],[13]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: ADB Safegate, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[10]         6,523,000          
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 665,000 [8],[15]   665,000 [8],[15]   550,000 [5],[16]          
Investment, Identifier [Axis]: AMMC CLO 22, Limited Series 2018-22A, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[15],[17]   0 [7],[8],[15],[17]   1,733,000 [5],[10],[18]          
Investment, Identifier [Axis]: APC1 Holding, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,702,000 [7],[8],[12],[19]   2,702,000 [7],[8],[12],[19]   2,370,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: APOG Bidco Pty Ltd, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[21]         864,000          
Investment, Identifier [Axis]: ASC Communications, LLC, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 848,000 [8]   848,000 [8]   869,000 [5]          
Investment, Identifier [Axis]: ASC Communications, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,444,000 [8],[12],[22]   5,444,000 [8],[12],[22]   7,344,000 [4],[5],[23]          
Investment, Identifier [Axis]: ASC Communications, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (8,000) [8],[12],[13],[22]   (8,000) [8],[12],[13],[22]   0 [4],[5],[14],[23]          
Investment, Identifier [Axis]: ATL II MRO Holdings Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 18,963,000 [8],[11],[12]   18,963,000 [8],[11],[12]   19,021,000 [3],[4],[5]          
Investment, Identifier [Axis]: ATL II MRO Holdings Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (35,000) [8],[11],[12],[13]   (35,000) [8],[11],[12],[13]   (49,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: AVSC Holding Corp., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [4],[23]         148,000          
Investment, Identifier [Axis]: AVSC Holding Corp., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [4],[23]         2,000          
Investment, Identifier [Axis]: Accelerant Holdings, Class A Convertible Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16]         6,347,000          
Investment, Identifier [Axis]: Accelerant Holdings, Class B Convertible Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16]         2,285,000          
Investment, Identifier [Axis]: Accelerant Holdings, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [15] 3,742,000   3,742,000              
Investment, Identifier [Axis]: Accelerant Holdings, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16]         7,840,000          
Investment, Identifier [Axis]: Accelevation LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] 595,000   595,000              
Investment, Identifier [Axis]: Accelevation LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] 159,000   159,000              
Investment, Identifier [Axis]: Acclime Holdings HK Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,884,000 [7],[8],[11],[12],[13]   5,884,000 [7],[8],[11],[12],[13]   2,438,000 [4],[5],[10],[24]          
Investment, Identifier [Axis]: Acclime Holdings HK Limited, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8] 230,000   230,000              
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   0 [5],[16]          
Investment, Identifier [Axis]: Accurus Aerospace Corporation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,930,000 [8],[11],[12]   12,930,000 [8],[11],[12]   11,612,000 [3],[4],[5]          
Investment, Identifier [Axis]: Accurus Aerospace Corporation, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 0   0              
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 606,000 [8],[11],[12],[13]   606,000 [8],[11],[12],[13]   1,768,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Acogroup, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,611,000 [7],[8],[12],[19],[25]   3,611,000 [7],[8],[12],[19],[25]   5,412,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Adhefin International, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,309,000 [7],[8],[12],[13],[19]   2,309,000 [7],[8],[12],[13],[19]   1,716,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Adhefin International, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[20]         326,000          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class A1 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 543,000 [8],[15]   543,000 [8],[15]   593,000 [5],[16]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class A2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 140,000 [8],[15]   140,000 [8],[15]   153,000 [5],[16]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class B1 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   0 [5],[16]          
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class B2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   0 [5],[16]          
Investment, Identifier [Axis]: Aegros Holdco 2 Ltd, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15] 587,000   587,000              
Investment, Identifier [Axis]: Aegros Holdco 2 Ltd, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[27] 5,309,000   5,309,000              
Investment, Identifier [Axis]: Air Canada 2020-2 Class B Pass Through Trust, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 1,799,000   1,799,000   2,411,000          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 3,194,000 [8],[11],[12]   3,194,000 [8],[11],[12]   2,710,000 [3],[4],[5]          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 3,211,000 [8],[11],[12],[13]   3,211,000 [8],[11],[12],[13]   3,828,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (7,000) [8],[11],[12],[13]   (7,000) [8],[11],[12],[13]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Aldinger Company, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8] 6,795,000   6,795,000              
Investment, Identifier [Axis]: AlliA Insurance Brokers NV, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,485,000 [7],[8],[12],[28]   5,485,000 [7],[8],[12],[28]   4,569,000 [4],[5],[10],[14],[26]          
Investment, Identifier [Axis]: Alpine SG, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,743,000 [8],[11],[12],[17]   12,743,000 [8],[11],[12],[17]   22,949,000 [3],[4],[5],[18]          
Investment, Identifier [Axis]: Amalfi Midco, Class B Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 2,663,000 [7],[8],[15]   2,663,000 [7],[8],[15]   1,239,000 [5],[10],[16]          
Investment, Identifier [Axis]: Amalfi Midco, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 348,000 [7],[8]   348,000 [7],[8]   290,000 [5],[10]          
Investment, Identifier [Axis]: Amalfi Midco, Subordinated Loan Notes                    
Schedule of Investments [Line Items]                    
Fair Value 6,411,000 [7],[8]   6,411,000 [7],[8]   5,492,000 [5],[10]          
Investment, Identifier [Axis]: Amalfi Midco, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value 1,065,000 [7],[8],[15]   1,065,000 [7],[8],[15]   919,000 [5],[10],[16]          
Investment, Identifier [Axis]: Americo Chemical Products, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 119,000 [8],[15]   119,000 [8],[15]   119,000 [5],[16]          
Investment, Identifier [Axis]: Americo Chemical Products, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,489,000 [8],[12],[22]   2,489,000 [8],[12],[22]   2,611,000 [4],[5],[23]          
Investment, Identifier [Axis]: Americo Chemical Products, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (5,000) [8],[12],[13],[22]   (5,000) [8],[12],[13],[22]   (7,000) [4],[5],[14],[23]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 6,227,000 [7],[8],[12],[19]   6,227,000 [7],[8],[12],[19]   2,995,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,012,000 [7],[8],[11],[12]   1,012,000 [7],[8],[11],[12]   1,576,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[26]         904,000          
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 4                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[10]         1,008,000          
Investment, Identifier [Axis]: Apex Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,358,000 [7],[8],[12],[29]   3,358,000 [7],[8],[12],[29]   3,180,000 [4],[5],[10],[30]          
Investment, Identifier [Axis]: Apex Bidco Limited, Subordinated Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 352,000 [7],[8]   352,000 [7],[8]   297,000 [5],[10]          
Investment, Identifier [Axis]: Apidos CLO XXIV, Series 2016-24A, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 2,896,000 [7],[17]   2,896,000 [7],[17]   3,272,000 [10],[18]          
Investment, Identifier [Axis]: Application Boot Camp LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [8] 256,000   256,000              
Investment, Identifier [Axis]: Application Boot Camp LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 1,199,000   1,199,000              
Investment, Identifier [Axis]: Application Boot Camp LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (7,000)   (7,000)              
Investment, Identifier [Axis]: Application Boot Camp LLC, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8] 82,000   82,000              
Investment, Identifier [Axis]: Aptus 1829. GmbH, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[15]   0 [7],[8],[15]   0 [5],[10],[16]          
Investment, Identifier [Axis]: Aptus 1829. GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,614,000 [7],[8],[12],[28]   3,614,000 [7],[8],[12],[28]   1,994,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Aptus 1829. GmbH, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 66,000 [7],[8],[15]   66,000 [7],[8],[15]   40,000 [5],[10],[16]          
Investment, Identifier [Axis]: Apus Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,878,000 [7],[8],[12],[31]   3,878,000 [7],[8],[12],[31]   3,608,000 [4],[5],[10],[32]          
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,787,000 [7],[8],[12],[31]   6,787,000 [7],[8],[12],[31]   6,314,000 [4],[5],[10],[14],[30]          
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,452,000 [7],[8],[12],[31]   2,452,000 [7],[8],[12],[31]   2,119,000 [4],[5],[10],[30]          
Investment, Identifier [Axis]: Arc Education, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,344,000 [7],[8],[12],[13],[28]   4,344,000 [7],[8],[12],[13],[28]   3,807,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Arch Global Precision LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,683,000 [8],[12],[22]   8,683,000 [8],[12],[22]   8,769,000 [3],[4],[5]          
Investment, Identifier [Axis]: Archimede, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,336,000 [7],[8],[12],[19]   6,336,000 [7],[8],[12],[19]   5,676,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: Argus Bidco Limited, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[15]   0 [7],[8],[15]   0 [5],[10],[16]          
Investment, Identifier [Axis]: Argus Bidco Limited, Equity Loan Notes                    
Schedule of Investments [Line Items]                    
Fair Value 30,000 [7],[8]   30,000 [7],[8]   33,000 [5],[10]          
Investment, Identifier [Axis]: Argus Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,033,000 [7],[8],[12],[28]   2,033,000 [7],[8],[12],[28]   1,773,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: Argus Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 129,000 [7],[8],[12],[33]   129,000 [7],[8],[12],[33]   127,000 [3],[4],[5],[10]          
Investment, Identifier [Axis]: Argus Bidco Limited, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 1,759,000 [7],[8],[12],[31]   1,759,000 [7],[8],[12],[31]   1,584,000 [4],[5],[10],[14],[30]          
Investment, Identifier [Axis]: Argus Bidco Limited, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 30,000 [7],[8]   30,000 [7],[8]   33,000 [5],[10]          
Investment, Identifier [Axis]: Argus Bidco Limited, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 914,000 [7],[8]   914,000 [7],[8]   777,000 [5],[10]          
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,433,000 [8],[12],[33]   6,433,000 [8],[12],[33]   5,637,000 [3],[4],[5]          
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC), Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[33] 1,000   1,000              
Investment, Identifier [Axis]: Artemis Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 472,000 [7],[8],[12],[13],[19]   472,000 [7],[8],[12],[13],[19]   256,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Astra Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 449,000 [7],[8],[12],[19]   449,000 [7],[8],[12],[19]   396,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: Astra Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,606,000 [7],[8],[12],[31]   2,606,000 [7],[8],[12],[31]   2,365,000 [4],[5],[10],[14],[32]          
Investment, Identifier [Axis]: Auxi International, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,569,000 [7],[8],[12],[19]   1,569,000 [7],[8],[12],[19]   1,351,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Auxi International, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 860,000 [7],[8],[12],[29]   860,000 [7],[8],[12],[29]   782,000 [4],[5],[10],[32]          
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,599,000 [7],[8],[12],[13],[34]   1,599,000 [7],[8],[12],[13],[34]   1,967,000 [4],[5],[10],[14],[35]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 319,000 [8],[15]   319,000 [8],[15]   288,000 [5],[16]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,750,000 [8],[12],[22]   4,750,000 [8],[12],[22]   4,785,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[12],[13],[22]   0 [8],[12],[13],[22]   0 [4],[5],[14],[23]          
Investment, Identifier [Axis]: Azalea Buyer, Inc., Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,982,000 [8]   1,982,000 [8]   1,805,000 [5]          
Investment, Identifier [Axis]: BKF Buyer, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,115,000 [8],[15]   1,115,000 [8],[15]   1,045,000 [5],[16]          
Investment, Identifier [Axis]: BKF Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,995,000 [8],[12],[22]   7,995,000 [8],[12],[22]   8,015,000 [4],[5],[23]          
Investment, Identifier [Axis]: BKF Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (37,000) [8],[12],[13],[22]   (37,000) [8],[12],[13],[22]   (52,000) [4],[5],[14],[23]          
Investment, Identifier [Axis]: BNI Global, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,607,000 [8],[12],[36]   10,607,000 [8],[12],[36]   9,302,000 [4],[5],[37]          
Investment, Identifier [Axis]: BPG Holdings IV Corp, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,699,000 [8],[11],[12]   11,699,000 [8],[11],[12]   12,560,000 [3],[4],[5]          
Investment, Identifier [Axis]: BVI Medical, Inc., Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[20]         9,482,000          
Investment, Identifier [Axis]: Bariacum S.A, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,458,000 [7],[8],[12],[19]   2,458,000 [7],[8],[12],[19]   3,107,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Basin Innovation Group, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,664,000 [8],[12],[13],[33]   7,664,000 [8],[12],[13],[33]   13,949,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: Basin Innovation Group, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[12],[13],[33]   0 [8],[12],[13],[33]   (28,000) [4],[5],[14],[23]          
Investment, Identifier [Axis]: Benify (Bennevis AB), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[38]         854,000          
Investment, Identifier [Axis]: Beyond Risk Management, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,282,000 [8],[12],[13],[22]   5,282,000 [8],[12],[13],[22]   5,322,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Bidwax, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,192,000 [7],[8],[12],[28]   8,192,000 [7],[8],[12],[28]   7,088,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Biolam Group, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 0   0              
Investment, Identifier [Axis]: Biolam Group, Convertible Bonds                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 0   0              
Investment, Identifier [Axis]: Biolam Group, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,699,000 [7],[8],[12],[13],[25],[28],[39]   1,699,000 [7],[8],[12],[13],[25],[28],[39]   1,406,000 [4],[5],[10],[14],[26],[40]          
Investment, Identifier [Axis]: Biolam Group, Ordinary Shares                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock A                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock A2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock B                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock C                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock O1                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 0   0              
Investment, Identifier [Axis]: Biolam Group, Preferred Stock O2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 0   0              
Investment, Identifier [Axis]: Biolam Group, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 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 1,699,000   1,699,000   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]: Bishop Street Underwriters, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] 2,854,000   2,854,000              
Investment, Identifier [Axis]: Bishop Street Underwriters, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 287,000   287,000              
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 0 [41]   0 [41]   0 [5],[18],[40],[41],[42],[43] $ 4,869,000 [43],[44]        
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 0 [41]   0 [41]   2,744,000 [4],[5],[18],[23],[40],[41],[42],[43] 7,166,000 [43],[44]        
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16],[18],[42]         0          
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0 [43] 0 [43]        
Investment, Identifier [Axis]: Bounteous, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,054,000 [8],[12],[22]   4,054,000 [8],[12],[22]   4,081,000 [3],[4],[5]          
Investment, Identifier [Axis]: Breeze Aviation Group Inc, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 7,496,000   7,496,000              
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Municipal Revenue Bond                    
Schedule of Investments [Line Items]                    
Fair Value 28,014,000   28,014,000   27,859,000          
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Preferred Stock- Series C                    
Schedule of Investments [Line Items]                    
Fair Value 15,716,000 [8]   15,716,000 [8]   14,618,000 [5]          
Investment, Identifier [Axis]: BrightSign LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,036,000 [8],[12],[22]   5,036,000 [8],[12],[22]   4,657,000 [4],[5],[23]          
Investment, Identifier [Axis]: BrightSign LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [8] 1,318,000   1,318,000              
Investment, Identifier [Axis]: BrightSign LLC, LLC units                    
Schedule of Investments [Line Items]                    
Fair Value [5]         1,174,000          
Investment, Identifier [Axis]: BrightSign LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 642,000 [8],[12],[13],[22]   642,000 [8],[12],[13],[22]   1,085,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: Brightpay Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,451,000 [7],[8],[12],[28]   2,451,000 [7],[8],[12],[28]   386,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Brightpay Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[26]         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 430,000   430,000   507,000          
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,763,000 [7],[8],[12],[31]   14,763,000 [7],[8],[12],[31]   14,454,000 [4],[5],[10],[32]          
Investment, Identifier [Axis]: Broadstone Group UK LTD, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[13],[31] 3,278,000   3,278,000              
Investment, Identifier [Axis]: Brook & Whittle Holding Corp., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,726,000 [11],[12],[17]   2,726,000 [11],[12],[17]   2,461,000 [3],[4],[18]          
Investment, Identifier [Axis]: Brown Machine Group Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,698,000 [8],[11],[12]   5,698,000 [8],[11],[12]   5,716,000 [4],[5],[23]          
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 414,000 [8],[15]   414,000 [8],[15]   450,000 [5],[16]          
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,100,000 [8],[11],[12]   4,100,000 [8],[11],[12]   4,364,000 [4],[5],[24]          
Investment, Identifier [Axis]: CAi Software, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         12,455,000          
Investment, Identifier [Axis]: CAi Software, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[14]         1,246,000          
Investment, Identifier [Axis]: CCFF Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,807,000 [8],[12],[13],[33]   5,807,000 [8],[12],[13],[33]   5,809,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: CCFF Buyer, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 249,000 [8]   249,000 [8]   235,000 [5]          
Investment, Identifier [Axis]: CCFF Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (10,000) [8],[12],[13],[33]   (10,000) [8],[12],[13],[33]   (15,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: CEC Entertainment, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 3,426,000   3,426,000              
Investment, Identifier [Axis]: CGI Parent, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,552,000 [8],[11],[12]   13,552,000 [8],[11],[12]   14,008,000 [3],[4],[5]          
Investment, Identifier [Axis]: CGI Parent, LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,909,000 [8],[15]   1,909,000 [8],[15]   1,710,000 [5],[16]          
Investment, Identifier [Axis]: CGI Parent, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[11],[12],[13]   0 [8],[11],[12],[13]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: CH Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 861,000   861,000              
Investment, Identifier [Axis]: CH Buyer, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 71,000   71,000              
Investment, Identifier [Axis]: CH Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (1,000)   (1,000)              
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,068,000 [8],[12],[33]   14,068,000 [8],[12],[33]   12,140,000 [3],[4],[5]          
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         1,523,000          
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,166,000 [8],[11],[12]   4,166,000 [8],[11],[12]   3,381,000 [3],[4],[5]          
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   0 [5],[16]          
Investment, Identifier [Axis]: CSL DualCom, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,325,000 [7],[8],[12],[27]   2,325,000 [7],[8],[12],[27]   2,016,000 [4],[5],[10],[14],[45]          
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, 2024 LIFO Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         4,211,000          
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,443,000 [8],[15]   1,443,000 [8],[15]   695,000 [5],[16]          
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 11,173,000   11,173,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, First Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         2,860,000          
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, First Out Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 856,000   856,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, First Out Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 2,315,000   2,315,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Last In First Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 4,696,000   4,696,000              
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Second Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 661,000 [8],[11],[12]   661,000 [8],[11],[12]   597,000 [3],[4],[5]          
Investment, Identifier [Axis]: CW Group Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,187,000 [8],[11],[12],[13]   5,187,000 [8],[11],[12],[13]   2,732,000 [3],[4],[5]          
Investment, Identifier [Axis]: CW Group Holdings, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 484,000 [8],[15]   484,000 [8],[15]   371,000 [5]          
Investment, Identifier [Axis]: Caldwell & Gregory LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,180,000 [8],[11],[12],[13]   14,180,000 [8],[11],[12],[13]   18,833,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Caldwell & Gregory LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[11],[12],[13]   0 [8],[11],[12],[13]   (34,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Class A Equity                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[15]   0 [7],[8],[15]   0 [5],[10],[16]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Class C - Warrants                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[15]   0 [7],[8],[15]   0 [5],[10],[16]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Class X Equity                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[15]   0 [7],[8],[15]   0 [5],[10],[16]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[15]   0 [7],[8],[15]   0 [5],[10],[16]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 228,000 [7],[8],[12],[25],[46]   228,000 [7],[8],[12],[25],[46]   360,000 [4],[5],[10],[40],[47]          
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Super Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 257,000 [7],[8],[13]   257,000 [7],[8],[13]   185,000 [5],[10],[14]          
Investment, Identifier [Axis]: Caribou Holding Company, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[10]         4,236,000          
Investment, Identifier [Axis]: Caribou Holding Company, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [5],[10],[16]         682,000          
Investment, Identifier [Axis]: Cascade Residential Services LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,543,000 [8],[11],[12]   4,543,000 [8],[11],[12]   3,742,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Cascade Residential Services LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (5,000) [8],[11],[12],[13]   (5,000) [8],[11],[12],[13]   312,000 [3],[4],[5]          
Investment, Identifier [Axis]: Catawba River Limited, Structured - Junior Note                    
Schedule of Investments [Line Items]                    
Fair Value 2,064,000 [7],[8],[15]   2,064,000 [7],[8],[15]   2,365,000 [5],[10]          
Investment, Identifier [Axis]: Celebration Bidco, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 7,745,000 [8],[15],[39]   7,745,000 [8],[15],[39]   11,262,000 [5],[16],[48]          
Investment, Identifier [Axis]: Celebration Bidco, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 7,745,000   7,745,000   11,262,000 [49] 12,177,000 [49]        
Investment, Identifier [Axis]: Celebration Bidco, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[5],[48]         6,414,000          
Investment, Identifier [Axis]: Celebration Bidco, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [49]         6,414,000 6,214,000        
Investment, Identifier [Axis]: Celebration Bidco, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 6,752,000 [8],[11],[39]   6,752,000 [8],[11],[39]   6,414,000          
Investment, Identifier [Axis]: Celebration Bidco, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,387,000 [8],[11],[39]   1,387,000 [8],[11],[39]   0          
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[20]         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 [7],[8],[12],[19] 4,389,000   4,389,000              
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[19] 833,000   833,000              
Investment, Identifier [Axis]: Ceres Pharma NV, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[26]         3,167,000          
Investment, Identifier [Axis]: Ceres Pharma NV, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[28] 3,572,000   3,572,000              
Investment, Identifier [Axis]: Ceres Pharma NV, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[13],[19] 399,000   399,000              
Investment, Identifier [Axis]: CloudOne Digital Corp., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 12,139,000   12,139,000              
Investment, Identifier [Axis]: CloudOne Digital Corp., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (34,000)   (34,000)              
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 19,983,000 [8],[15],[39]   19,983,000 [8],[15],[39]   16,852,000 [5],[16],[48],[49] 12,160,000 [49]        
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 15,861,000 [8],[39]   15,861,000 [8],[39]   15,770,000 [5],[48],[49] 15,649,000 [49]        
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 7,313,000 [8],[39]   7,313,000 [8],[39]   7,271,000 [5],[48],[49] 6,868,000 [49]        
Investment, Identifier [Axis]: Cobham Slip Rings SAS, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,292,000 [7],[8],[11],[12]   1,292,000 [7],[8],[11],[12]   1,303,000 [4],[5],[10],[24]          
Investment, Identifier [Axis]: Coherus Biosciences, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,963,000 [8],[11],[12]   3,963,000 [8],[11],[12]   3,903,000 [3],[4],[5]          
Investment, Identifier [Axis]: Coherus Biosciences, Inc., Royalty Rights                    
Schedule of Investments [Line Items]                    
Fair Value 1,581,000 [8]   1,581,000 [8]   5,834,000 [5]          
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Class B Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 170,000 [8],[15]   170,000 [8],[15]   175,000 [5],[16]          
Investment, Identifier [Axis]: Compass Precision, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 344,000 [8],[15]   344,000 [8],[15]   299,000 [5],[16]          
Investment, Identifier [Axis]: Compass Precision, LLC, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 653,000 [8]   653,000 [8]   640,000 [5]          
Investment, Identifier [Axis]: Comply365, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,811,000 [8],[11],[12]   10,811,000 [8],[11],[12]   18,663,000 [4],[5],[23]          
Investment, Identifier [Axis]: Comply365, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[11],[12],[13]   0 [8],[11],[12],[13]   0 [4],[5],[14],[23]          
Investment, Identifier [Axis]: Contabo Finco S.À.R.L, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[20]         4,822,000          
Investment, Identifier [Axis]: Contabo FincoS.À R.L, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[19] 5,471,000   5,471,000              
Investment, Identifier [Axis]: Coyo Uprising GmbH, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 241,000 [7],[8],[15]   241,000 [7],[8],[15]   206,000 [5],[10],[16]          
Investment, Identifier [Axis]: Coyo Uprising GmbH, Class B Units                    
Schedule of Investments [Line Items]                    
Fair Value 452,000 [7],[8],[15]   452,000 [7],[8],[15]   381,000 [5],[10],[16]          
Investment, Identifier [Axis]: Coyo Uprising GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,337,000 [7],[8],[12],[13],[28]   5,337,000 [7],[8],[12],[13],[28]   4,590,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: DAWGS Intermediate Holdings Co., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 1,784,000   1,784,000              
Investment, Identifier [Axis]: DAWGS Intermediate Holdings Co., LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 401,000   401,000              
Investment, Identifier [Axis]: DAWGS Intermediate Holdings Co., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 240,000   240,000              
Investment, Identifier [Axis]: DISA Holdings Corp., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,897,000 [8],[12],[22]   6,897,000 [8],[12],[22]   6,950,000 [3],[4],[5]          
Investment, Identifier [Axis]: DISA Holdings Corp., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 86,000 [8],[12],[13],[22]   86,000 [8],[12],[13],[22]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: DataServ Integrations, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[24]         1,871,000          
Investment, Identifier [Axis]: DataServ Integrations, LLC, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16]         103,000          
Investment, Identifier [Axis]: DataServ Integrations, LLC, Preferred Units                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 193,000   193,000              
Investment, Identifier [Axis]: DataServ Integrations, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[14],[24]         0          
Investment, Identifier [Axis]: David Wood Baking UK Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 871,000 [7],[8],[12],[31]   871,000 [7],[8],[12],[31]   818,000 [4],[5],[10],[32]          
Investment, Identifier [Axis]: DecksDirect, LLC, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   0 [5],[16]          
Investment, Identifier [Axis]: DecksDirect, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   0 [5],[16]          
Investment, Identifier [Axis]: DecksDirect, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,070,000 [8],[11],[12]   1,070,000 [8],[11],[12]   1,383,000 [3],[4],[5]          
Investment, Identifier [Axis]: DecksDirect, LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [8] 0   0              
Investment, Identifier [Axis]: DecksDirect, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (14,000) [8],[11],[12],[13]   (14,000) [8],[11],[12],[13]   301,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Discovery Buyer, L.P., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 12,315,000   12,315,000              
Investment, Identifier [Axis]: Discovery Buyer, L.P., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (18,000)   (18,000)              
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 436,000 [8]   436,000 [8]   333,000 [5],[16]          
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 802,000 [8]   802,000 [8]   717,000 [5]          
Investment, Identifier [Axis]: Dragon Bidco, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[20]         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 [4],[5],[10],[20]         2,202,000          
Investment, Identifier [Axis]: Dryden 49 Senior Loan Fund, Series 2017-49A, Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 9,000 [7],[15],[17]   9,000 [7],[15],[17]   437,000 [10],[16],[18]          
Investment, Identifier [Axis]: Dune Group, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[14],[20]         91,000          
Investment, Identifier [Axis]: Dune Group, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[10]         193,000          
Investment, Identifier [Axis]: Dune Group, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[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 [7],[8],[11],[12]   1,000,000 [7],[8],[11],[12]   998,000 [3],[4],[5],[10]          
Investment, Identifier [Axis]: Durare Bidco, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 1,389,000   1,389,000              
Investment, Identifier [Axis]: Durare Bidco, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (10,000)   (10,000)              
Investment, Identifier [Axis]: Dwyer Instruments, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,478,000 [8],[11],[12]   14,478,000 [8],[11],[12]   14,433,000 [3],[4],[5]          
Investment, Identifier [Axis]: EB Development, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,014,000 [7],[8],[12],[13],[19]   2,014,000 [7],[8],[12],[13],[19]   1,971,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: EFC International, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 254,000 [8],[15]   254,000 [8],[15]   380,000 [5],[16]          
Investment, Identifier [Axis]: EFC International, Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 818,000 [8]   818,000 [8]   797,000 [5]          
Investment, Identifier [Axis]: EMI Porta Holdco LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,147,000 [8],[11],[12]   11,147,000 [8],[11],[12]   11,696,000 [3],[4],[5]          
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 546,000 [8],[12],[13],[22]   546,000 [8],[12],[13],[22]   543,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: EZ SMBO Bidco, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8] 674,000   674,000              
Investment, Identifier [Axis]: EZ SMBO Bidco, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[46] 907,000   907,000              
Investment, Identifier [Axis]: EZ SMBO Bidco, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[13],[28] 568,000   568,000              
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 265,000 [8],[15]   265,000 [8],[15]   417,000 [5],[16]          
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,223,000 [8],[12],[22]   9,223,000 [8],[12],[22]   9,450,000 [4],[5],[23]          
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 7,000,000   7,000,000   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 139,538,000   139,538,000   136,855,000 [49] 145,799,000 [49]        
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 139,538,000 [8],[39]   139,538,000 [8],[39]   136,855,000 [5],[48]          
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 7,000,000 [8],[13],[22],[39]   7,000,000 [8],[13],[22],[39]   10,091,000 [5],[14],[23],[48]          
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 7,000,000   7,000,000   10,091,000 [49] 5,545,000 [49]        
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,545,000 [8],[39]   4,545,000 [8],[39]   4,545,000 [5],[48]          
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 [49] 4,545,000 [49]        
Investment, Identifier [Axis]: Electric Equipment & Engineering Co., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 316,000 [8]   316,000 [8]   307,000 [5]          
Investment, Identifier [Axis]: Electric Equipment & Engineering Co., LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 306,000 [8],[15]   306,000 [8],[15]   188,000 [5],[16]          
Investment, Identifier [Axis]: Electrical Components International, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[14],[24]         10,410,000          
Investment, Identifier [Axis]: Ellkay, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         4,348,000          
Investment, Identifier [Axis]: Entact Environmental Services, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,294,000 [8],[11],[12]   6,294,000 [8],[11],[12]   6,624,000 [3],[4],[5]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 617,000 [7],[8],[12],[25],[28]   617,000 [7],[8],[12],[25],[28]   831,000 [4],[5],[10],[26],[40]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 298,000 [7],[8],[11],[12],[25]   298,000 [7],[8],[11],[12],[25]   453,000 [3],[4],[5],[10],[40]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 938,000 [7],[8],[12],[25],[31]   938,000 [7],[8],[12],[25],[31]   1,165,000 [4],[5],[10],[32],[40]          
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[25]   0 [7],[8],[25]   0 [5],[10],[40]          
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,426,000 [7],[8],[12],[13],[34]   1,426,000 [7],[8],[12],[13],[34]   1,336,000 [4],[5],[10],[14],[35]          
Investment, Identifier [Axis]: Expert Institute Group Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 1,071,000   1,071,000              
Investment, Identifier [Axis]: Expert Institute Group Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (6,000)   (6,000)              
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,256,000 [8],[11],[12]   3,256,000 [8],[11],[12]   5,955,000 [3],[4],[5]          
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (1,000) [8],[11],[12],[13]   (1,000) [8],[11],[12],[13]   124,000 [3],[4],[5],[14]          
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 11,938,000 [8],[12],[22]   11,938,000 [8],[12],[22]   11,950,000 [3],[4],[5]          
Investment, Identifier [Axis]: FSS Buyer LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,360,000 [8],[12],[22]   9,360,000 [8],[12],[22]   4,740,000 [4],[5],[23]          
Investment, Identifier [Axis]: FSS Buyer LLC, LP Interest                    
Schedule of Investments [Line Items]                    
Fair Value 17,000 [8],[15]   17,000 [8],[15]   17,000 [5]          
Investment, Identifier [Axis]: FSS Buyer LLC, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 76,000 [8],[15]   76,000 [8],[15]   74,000 [5],[16]          
Investment, Identifier [Axis]: Faraday, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,784,000 [7],[8],[12],[19]   1,784,000 [7],[8],[12],[19]   1,552,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Featherstone Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[29] 2,268,000   2,268,000              
Investment, Identifier [Axis]: Ferrellgas L.P., Opco Preferred Units                    
Schedule of Investments [Line Items]                    
Fair Value 2,886,000 [8]   2,886,000 [8]   2,799,000 [5]          
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings Inc., Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 6,706,000 [8]   6,706,000 [8]   5,608,000 [5]          
Investment, Identifier [Axis]: Finaxy Holding, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,359,000 [7],[8],[12],[28]   4,359,000 [7],[8],[12],[28]   3,872,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Finexvet, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,907,000 [7],[8],[12],[28]   4,907,000 [7],[8],[12],[28]   4,613,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: FitzMark Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,994,000 [8],[12],[22]   3,994,000 [8],[12],[22]   4,128,000 [4],[5],[23]          
Investment, Identifier [Axis]: Five Star Holding LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 755,000 [8],[15]   755,000 [8],[15]   564,000 [5],[16]          
Investment, Identifier [Axis]: Five Star Holding LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,692,000 [8],[11],[12]   13,692,000 [8],[11],[12]   13,198,000 [3],[4],[5]          
Investment, Identifier [Axis]: Flexential Issuer, LLC, Structured Secured Note - Class C                    
Schedule of Investments [Line Items]                    
Fair Value         15,339,000          
Investment, Identifier [Axis]: Flywheel Holdings Segregated Portfolio 2025-2, LP Interest                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15] 2,805,000   2,805,000              
Investment, Identifier [Axis]: Flywheel Re Segregated Portfolio 2022-4, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 2,687,000 [7],[8]   2,687,000 [7],[8]   3,875,000 [5],[10],[16]          
Investment, Identifier [Axis]: Footco 40 Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 246,000 [7],[8],[12],[19]   246,000 [7],[8],[12],[19]   217,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: Footco 40 Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,709,000 [7],[8],[12],[29]   1,709,000 [7],[8],[12],[29]   1,588,000 [4],[5],[10],[14],[30]          
Investment, Identifier [Axis]: Forest Buyer, LLC, Class A LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 137,000 [8]   137,000 [8]   130,000 [5],[16]          
Investment, Identifier [Axis]: Forest Buyer, LLC, Class B LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 66,000 [8],[15]   66,000 [8],[15]   124,000 [5],[16]          
Investment, Identifier [Axis]: Forest Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,031,000 [8],[11],[12]   6,031,000 [8],[11],[12]   6,091,000 [3],[4],[5]          
Investment, Identifier [Axis]: Forest Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (3,000) [8],[11],[12],[13]   (3,000) [8],[11],[12],[13]   (2,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[14]         8,815,000          
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[14]         (9,000)          
Investment, Identifier [Axis]: FragilePak LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,508,000 [8],[11],[12]   4,508,000 [8],[11],[12]   4,544,000 [3],[4],[5]          
Investment, Identifier [Axis]: FragilePak LLC, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 735,000 [8],[15]   735,000 [8],[15]   767,000 [5],[16]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,173,000 [8],[11],[12],[13]   6,173,000 [8],[11],[12],[13]   9,129,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,512,000 [8]   1,512,000 [8]   1,350,000 [5]          
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 868,000 [8],[11],[12],[13]   868,000 [8],[11],[12],[13]   (23,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: GCDL LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 355,000 [8]   355,000 [8]   243,000 [5],[16]          
Investment, Identifier [Axis]: GCDL LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 503,000 [8],[11],[12],[13]   503,000 [8],[11],[12],[13]   529,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: GCDL LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (1,000) [8],[11],[12],[13]   (1,000) [8],[11],[12],[13]   (2,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: GMES LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 7,617,000   7,617,000              
Investment, Identifier [Axis]: GMES LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (13,000)   (13,000)              
Investment, Identifier [Axis]: GPNZ II GmbH, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[15]   0 [7],[8],[15]   0 [5],[10],[16]          
Investment, Identifier [Axis]: GPNZ II GmbH, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 214,000 [7],[8],[13]   214,000 [7],[8],[13]   271,000 [5],[10]          
Investment, Identifier [Axis]: GPNZ II GmbH, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 62,000 [7],[8]   62,000 [7],[8]   33,000 [4],[5],[10],[14]          
Investment, Identifier [Axis]: GPNZ II GmbH, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[12],[25],[36]   0 [7],[8],[12],[25],[36]   189,000 [4],[5],[10],[37],[40]          
Investment, Identifier [Axis]: Global Academic Group Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,680,000 [7],[8],[12],[34]   2,680,000 [7],[8],[12],[34]   2,284,000 [4],[5],[10],[35]          
Investment, Identifier [Axis]: Global Academic Group Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 4,146,000 [7],[8],[12],[13],[50]   4,146,000 [7],[8],[12],[13],[50]   4,000,000 [4],[5],[10],[14],[51]          
Investment, Identifier [Axis]: Gojo Industries, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,677,000 [8],[12],[22]   12,677,000 [8],[12],[22]   12,883,000 [3],[4],[5]          
Investment, Identifier [Axis]: Graphpad Software, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[14]         9,499,000          
Investment, Identifier [Axis]: Graphpad Software, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[14]         (1,000)          
Investment, Identifier [Axis]: Greenhill II BV, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,763,000 [7],[8],[12],[13],[19]   1,763,000 [7],[8],[12],[13],[19]   936,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Groupe Guemas, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,424,000 [7],[8],[12],[28]   5,424,000 [7],[8],[12],[28]   4,747,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Groupe Product Life, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 496,000 [7],[8],[12],[13],[19]   496,000 [7],[8],[12],[13],[19]   871,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: HEKA Invest, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,504,000 [7],[8],[12],[13],[19]   5,504,000 [7],[8],[12],[13],[19]   4,850,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: HS Advisory Buyer LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 1,492,000   1,492,000              
Investment, Identifier [Axis]: HS Advisory Buyer LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (8,000)   (8,000)              
Investment, Identifier [Axis]: HSL Compliance, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[13],[29] 2,674,000   2,674,000              
Investment, Identifier [Axis]: HTI Technology & Industries, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,342,000 [8],[11],[12],[13]   10,342,000 [8],[11],[12],[13]   10,421,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: HTI Technology & Industries, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (78,000) [8],[11],[12],[13]   (78,000) [8],[11],[12],[13]   (70,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,190,000 [8],[11],[12]   10,190,000 [8],[11],[12]   11,081,000 [3],[4],[5]          
Investment, Identifier [Axis]: Haystack Holdings LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[33] 6,581,000   6,581,000              
Investment, Identifier [Axis]: Haystack Holdings LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[33] (1,000)   (1,000)              
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 700,000 [7],[8],[12],[13],[34]   700,000 [7],[8],[12],[13],[34]   602,000 [4],[5],[10],[35]          
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,167,000 [8]   14,167,000 [8]   12,865,000 [5]          
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,166,000 [8],[11],[12]   7,166,000 [8],[11],[12]   7,221,000 [3],[4],[5]          
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[11],[12],[13]   0 [8],[11],[12],[13]   0 [3],[4],[5],[14]          
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 3,541,000 [7],[8],[12],[28]   3,541,000 [7],[8],[12],[28]   3,042,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: HemaSource, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 133,000 [8],[15]   133,000 [8],[15]   124,000 [5],[16]          
Investment, Identifier [Axis]: HemaSource, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,699,000 [8],[12],[22]   6,699,000 [8],[12],[22]   7,267,000 [4],[5],[23]          
Investment, Identifier [Axis]: HemaSource, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[12],[13],[22]   0 [8],[12],[13],[22]   0 [4],[5],[14],[23]          
Investment, Identifier [Axis]: Herbalife Ltd., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,252,000 [7],[12],[22]   3,252,000 [7],[12],[22]   3,294,000 [4],[10],[23]          
Investment, Identifier [Axis]: High Street Buyer Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 185,000   185,000              
Investment, Identifier [Axis]: Home Care Assistance, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,240,000 [8],[11],[12]   3,240,000 [8],[11],[12]   3,524,000 [3],[4],[5]          
Investment, Identifier [Axis]: HomeX Services Group LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,710,000 [8],[11],[12],[13]   1,710,000 [8],[11],[12],[13]   1,477,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: HomeX Services Group LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 34,000 [8],[11],[12],[13]   34,000 [8],[11],[12],[13]   (3,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Honour Lane Logistics Holdings Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,667,000 [7],[8],[12],[33]   6,667,000 [7],[8],[12],[33]   6,645,000 [4],[5],[10],[24]          
Investment, Identifier [Axis]: Hydratech Holdings, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,948,000 [8],[11],[12],[13]   8,948,000 [8],[11],[12],[13]   7,413,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Hydratech Holdings, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 511,000 [8],[11],[12],[13]   511,000 [8],[11],[12],[13]   265,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Hygie 31 Holding, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[26]         1,502,000          
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [49]         0 2,013,000        
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [49]         0 3,917,000        
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [49]         0 4,519,000        
Investment, Identifier [Axis]: ICREDITWORKS LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [8] 10,633,000   10,633,000              
Investment, Identifier [Axis]: ICREDITWORKS LLC, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 0   0              
Investment, Identifier [Axis]: IM Square, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,894,000 [7],[8],[12],[19]   2,894,000 [7],[8],[12],[19]   2,533,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: ISTO Technologies II, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[24]         6,706,000          
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[14],[24]         (2,000)          
Investment, Identifier [Axis]: ITI Intermodal, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 984,000 [8],[15]   984,000 [8],[15]   915,000 [5],[16]          
Investment, Identifier [Axis]: ITI Intermodal, Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 795,000 [8],[11],[12]   795,000 [8],[11],[12]   800,000 [4],[5],[24]          
Investment, Identifier [Axis]: ITI Intermodal, Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 11,986,000 [8],[11],[12]   11,986,000 [8],[11],[12]   12,079,000 [4],[5],[24]          
Investment, Identifier [Axis]: ITI Intermodal, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 226,000 [8],[11],[12],[13]   226,000 [8],[11],[12],[13]   225,000 [4],[5],[14],[24]          
Investment, Identifier [Axis]: Ice House America, L.L.C., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,388,000 [8],[11],[12],[13]   4,388,000 [8],[11],[12],[13]   4,482,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Ice House America, L.L.C., LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 226,000 [8],[15]   226,000 [8],[15]   316,000 [5],[16]          
Investment, Identifier [Axis]: Ice House America, L.L.C., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 372,000 [8],[11],[12],[13]   372,000 [8],[11],[12],[13]   186,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Infoniqa Holdings GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,088,000 [7],[8],[12],[19]   3,088,000 [7],[8],[12],[19]   2,721,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Innovad Group II BV, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 7,243,000 [7],[8],[12],[19]   7,243,000 [7],[8],[12],[19]   6,383,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Innovad Group II BV, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,152,000 [7],[8],[12],[52]   1,152,000 [7],[8],[12],[52]   1,012,000 [4],[5],[10],[53]          
Investment, Identifier [Axis]: Innovative XCessories & Services, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[18]         2,746,000          
Investment, Identifier [Axis]: International Fleet Financing No.2 B.V., Class C Senior Secured Note                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[13] 8,769,000   8,769,000              
Investment, Identifier [Axis]: Interstellar Group B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,729,000 [7],[8],[12],[13],[19]   1,729,000 [7],[8],[12],[13],[19]   1,509,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: InvoCare Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,146,000 [7],[8],[12],[13],[34]   2,146,000 [7],[8],[12],[13],[34]   1,963,000 [4],[5],[10],[14],[35]          
Investment, Identifier [Axis]: Isagenix International, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16],[18]         0          
Investment, Identifier [Axis]: Isagenix International, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[18]         160,000          
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,786,000 [7],[8],[12],[19]   5,786,000 [7],[8],[12],[19]   5,075,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: Ivanti Software Inc, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [11],[12],[17] 937,000   937,000              
Investment, Identifier [Axis]: Ivanti Software Inc, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [11],[12],[17] 2,613,000   2,613,000              
Investment, Identifier [Axis]: Ivanti Software, Inc., Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[18]         3,285,000          
Investment, Identifier [Axis]: JF Acquisition, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         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 1,264,000 [7],[8],[12],[28]   1,264,000 [7],[8],[12],[28]   1,112,000 [4],[5],[10],[26]          
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 [7],[8],[12],[33]   6,526,000 [7],[8],[12],[33]   6,579,000 [4],[5],[10],[24]          
Investment, Identifier [Axis]: JetBlue 2019-1 Class B Pass Through Trust, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value         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],[14],[48],[54]         40,761,000          
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 38,838,000 [7],[39],[55]   38,838,000 [7],[39],[55]   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 4,023,000 [7],[8],[12],[13],[50]   4,023,000 [7],[8],[12],[13],[50]   3,720,000 [4],[5],[10],[14],[51]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,466,000 [8],[12],[33]   4,466,000 [8],[12],[33]   3,481,000 [3],[4],[5]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 827,000 [8]   827,000 [8]   372,000 [5]          
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 80,000 [8],[12],[13],[33]   80,000 [8],[12],[13],[33]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: KAMC Holdings Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 5,353,000   5,353,000              
Investment, Identifier [Axis]: KAMC Holdings Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 155,000   155,000              
Investment, Identifier [Axis]: Keystone Bidco B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 918,000 [7],[8],[12],[13],[28]   918,000 [7],[8],[12],[13],[28]   677,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Keystone Bidco B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 10,000 [7],[8],[12],[13],[28]   10,000 [7],[8],[12],[13],[28]   18,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,088,000 [8],[12],[33]   13,088,000 [8],[12],[33]   13,156,000 [3],[4],[5]          
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 721,000 [8],[15]   721,000 [8],[15]   772,000 [5],[16]          
Investment, Identifier [Axis]: LHS Borrower, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[22] 9,039,000   9,039,000              
Investment, Identifier [Axis]: LHS Borrower, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] (12,000)   (12,000)              
Investment, Identifier [Axis]: Lambir Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,282,000 [7],[8],[12],[13],[28]   2,282,000 [7],[8],[12],[13],[28]   1,952,000 [4],[5],[10],[14],[26]          
Investment, Identifier [Axis]: Lambir Bidco Limited, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,988,000 [7],[8]   1,988,000 [7],[8]   1,721,000 [5],[10]          
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[14],[24]         687,000          
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[33] 608,000   608,000              
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[11],[12],[13] 127,000   127,000              
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[31] 154,000   154,000              
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 35,000 [7],[8],[12],[33]   35,000 [7],[8],[12],[33]   (1,000) [4],[5],[10],[14],[24]          
Investment, Identifier [Axis]: LeadsOnline, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,964,000 [8],[11],[12]   9,964,000 [8],[11],[12]   10,029,000 [3],[4],[5]          
Investment, Identifier [Axis]: LeadsOnline, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 199,000 [8]   199,000 [8]   180,000 [5]          
Investment, Identifier [Axis]: LeadsOnline, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (7,000) [8],[11],[12],[13]   (7,000) [8],[11],[12],[13]   (10,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Learfield Communications, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16]         4,085,000          
Investment, Identifier [Axis]: Learfield Communications, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[23]         5,520,000          
Investment, Identifier [Axis]: Legal Solutions Holdings, Senior Subordinated Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[40],[56]         0          
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Class A Common Units                    
Schedule of Investments [Line Items]                    
Fair Value [15],[17] 0   0              
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,535,000 [8],[11],[12],[17]   2,535,000 [8],[11],[12],[17]   2,812,000 [3],[4],[5],[18]          
Investment, Identifier [Axis]: Lockmasters Security Intermediate, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 9,312,000   9,312,000              
Investment, Identifier [Axis]: Lockmasters Security Intermediate, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] (6,000)   (6,000)              
Investment, Identifier [Axis]: Long Term Care Group, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,395,000 [8],[11],[12]   8,395,000 [8],[11],[12]   7,839,000 [3],[4],[5]          
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 [4],[5],[10],[20]         10,829,000          
Investment, Identifier [Axis]: M-Personal Protection Management GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[19] 4,141,000   4,141,000              
Investment, Identifier [Axis]: MB Purchaser, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,437,000 [8],[11],[12],[13]   1,437,000 [8],[11],[12],[13]   2,591,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: MB Purchaser, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 89,000 [8],[15]   89,000 [8],[15]   82,000 [5],[16]          
Investment, Identifier [Axis]: MB Purchaser, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (1,000) [8],[11],[12],[13]   (1,000) [8],[11],[12],[13]   (2,000) [4],[5],[14],[23]          
Investment, Identifier [Axis]: MC Group Ventures Corporation, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 4,782,000 [8],[11],[12],[13]   4,782,000 [8],[11],[12],[13]   4,899,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: MC Group Ventures Corporation, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 4,221,000 [8],[11],[12],[13]   4,221,000 [8],[11],[12],[13]   4,036,000 [4],[5],[14],[24]          
Investment, Identifier [Axis]: MC Group Ventures Corporation, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 598,000 [8],[15]   598,000 [8],[15]   681,000 [5],[16]          
Investment, Identifier [Axis]: MI OpCo Holdings, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[23]         6,320,000          
Investment, Identifier [Axis]: MIV Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 2,621,000   2,621,000              
Investment, Identifier [Axis]: MIV Buyer, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 101,000   101,000              
Investment, Identifier [Axis]: MIV Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (6,000)   (6,000)              
Investment, Identifier [Axis]: MNS Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 348,000 [8],[12],[22]   348,000 [8],[12],[22]   662,000 [3],[4],[5]          
Investment, Identifier [Axis]: MNS Buyer, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 189,000 [8],[15]   189,000 [8],[15]   106,000 [5],[16]          
Investment, Identifier [Axis]: MSI Express Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 1,540,000   1,540,000              
Investment, Identifier [Axis]: MSI Express Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 990,000   990,000              
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value [43]         0 9,762,000        
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Common Equity Interest                    
Schedule of Investments [Line Items]                    
Fair Value 9,713,000 [7],[8],[15],[57],[58]   9,713,000 [7],[8],[15],[57],[58]   13,741,000 [5],[10],[16],[42],[56]          
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Common Equity Interest                    
Schedule of Investments [Line Items]                    
Fair Value 9,713,000   9,713,000   13,741,000 [43] 15,430,000 [43]        
Investment, Identifier [Axis]: MVC Automotive Group GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[58] 1,172,000   1,172,000              
Investment, Identifier [Axis]: MVC Automotive Group GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,172,000   1,172,000   0          
Investment, Identifier [Axis]: MVC Private Equity Fund LP, General Partnership Interest                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0 [10],[16],[42],[56] 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],[16],[42],[56] 981,000        
Investment, Identifier [Axis]: Magnetite XIX, Limited, Subordinated Notes                    
Schedule of Investments [Line Items]                    
Fair Value 5,129,000 [7],[11],[12],[17]   5,129,000 [7],[11],[12],[17]   10,500,000 [3],[5],[10],[18]          
Investment, Identifier [Axis]: Marmoutier Holding B.V., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15] 0   0              
Investment, Identifier [Axis]: Marmoutier Holding B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 37,000 [7],[8],[12],[13],[19]   37,000 [7],[8],[12],[13],[19]   146,000 [4],[5],[10],[14],[26],[40]          
Investment, Identifier [Axis]: Marmoutier Holding B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 146,000 [7],[8],[12],[19]   146,000 [7],[8],[12],[19]   (53,000) [4],[5],[10],[14],[26],[40]          
Investment, Identifier [Axis]: Marmoutier Holding B.V., Super Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 159,000 [7],[8],[12],[28]   159,000 [7],[8],[12],[28]   185,000 [4],[5],[10],[40]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,753,000 [8],[11],[12]   1,753,000 [8],[11],[12]   1,747,000 [3],[4],[5]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 3,660,000 [8],[12],[27]   3,660,000 [8],[12],[27]   3,775,000 [4],[5],[45]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Revolver 1                    
Schedule of Investments [Line Items]                    
Fair Value 34,000 [8],[11],[12],[13]   34,000 [8],[11],[12],[13]   (9,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Revolver 2                    
Schedule of Investments [Line Items]                    
Fair Value (8,000) [8],[12],[13],[27]   (8,000) [8],[12],[13],[27]   (10,000) [4],[5],[14],[45]          
Investment, Identifier [Axis]: Median B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,829,000 [7],[12],[29]   9,829,000 [7],[12],[29]   8,966,000 [4],[10],[32]          
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc., Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 892,000 [11],[12]   892,000 [11],[12]   2,211,000 [3],[4]          
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   0 [5],[16]          
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,025,000 [8],[11],[12]   4,025,000 [8],[11],[12]   3,648,000 [3],[4],[5]          
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 129,000 [8],[15]   129,000 [8],[15]   46,000 [5],[16]          
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 66,000 [8],[11],[12],[13]   66,000 [8],[11],[12],[13]   108,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Mercell Holding AS, Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value 152,000 [7],[8],[15]   152,000 [7],[8],[15]   125,000 [5],[10],[16]          
Investment, Identifier [Axis]: Mercell Holding AS, Class B Units                    
Schedule of Investments [Line Items]                    
Fair Value 0 [7],[8],[15]   0 [7],[8],[15]   21,000 [5],[10],[16]          
Investment, Identifier [Axis]: Mercell Holding AS, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,136,000 [7],[8],[12],[13],[59]   3,136,000 [7],[8],[12],[13],[59]   2,750,000 [4],[5],[10],[14],[60]          
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[13],[61] 7,374,000   7,374,000              
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[14],[62]         7,008,000          
Investment, Identifier [Axis]: Momentum Textiles, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 7,233,000   7,233,000              
Investment, Identifier [Axis]: Momentum Textiles, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (7,000)   (7,000)              
Investment, Identifier [Axis]: Moonlight Bidco Limited, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 210,000 [7],[8],[15]   210,000 [7],[8],[15]   182,000 [5],[10],[16]          
Investment, Identifier [Axis]: Moonlight Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,000,000 [7],[8],[12],[13],[29]   2,000,000 [7],[8],[12],[13],[29]   1,841,000 [4],[5],[10],[14],[30]          
Investment, Identifier [Axis]: Murphy Midco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,674,000 [7],[8],[12],[31]   1,674,000 [7],[8],[12],[31]   1,641,000 [4],[5],[10],[32]          
Investment, Identifier [Axis]: Music Reports, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,805,000 [8],[11],[12]   6,805,000 [8],[11],[12]   6,618,000 [3],[4],[5]          
Investment, Identifier [Axis]: NAW Buyer LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,127,000 [8],[11],[12],[13]   12,127,000 [8],[11],[12],[13]   11,850,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: NAW Buyer LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 614,000 [8]   614,000 [8]   524,000 [5]          
Investment, Identifier [Axis]: NAW Buyer LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[11],[12],[13]   0 [8],[11],[12],[13]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: NF Holdco, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,061,000 [8],[11],[12]   6,061,000 [8],[11],[12]   6,283,000 [3],[4],[5]          
Investment, Identifier [Axis]: NF Holdco, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 307,000 [8],[15]   307,000 [8],[15]   563,000 [5],[16]          
Investment, Identifier [Axis]: NF Holdco, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 610,000 [8],[11],[12],[13]   610,000 [8],[11],[12],[13]   276,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: NPM Investments 28 B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,139,000 [7],[8],[12],[13],[19]   2,139,000 [7],[8],[12],[13],[19]   1,869,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Napa Bidco Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,337,000 [7],[8],[12],[34]   13,337,000 [7],[8],[12],[34]   12,459,000 [4],[5],[10],[35]          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Class A Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16]         578,000          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Class B Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16]         743,000          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[23]         5,074,000          
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[14],[23]         0          
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,528,000 [8],[12],[22]   5,528,000 [8],[12],[22]   5,572,000 [4],[5],[23]          
Investment, Identifier [Axis]: NeoxCo, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,809,000 [7],[8],[12],[28]   2,809,000 [7],[8],[12],[28]   2,456,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Next Holdco, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 22,074,000 [8],[11],[12],[13]   22,074,000 [8],[11],[12],[13]   7,320,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Next Holdco, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (4,000) [8],[11],[12],[13]   (4,000) [8],[11],[12],[13]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Northstar Recycling, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,511,000 [8],[11],[12]   12,511,000 [8],[11],[12]   16,910,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Northstar Recycling, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (35,000) [8],[11],[12],[13]   (35,000) [8],[11],[12],[13]   (44,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: OA Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[23]         8,268,000          
Investment, Identifier [Axis]: OA Buyer, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [5]         783,000          
Investment, Identifier [Axis]: OA Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[14],[23]         (5,000)          
Investment, Identifier [Axis]: OAC Holdings I Corp, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,294,000 [8],[11],[12]   3,294,000 [8],[11],[12]   3,539,000 [4],[5],[23]          
Investment, Identifier [Axis]: OAC Holdings I Corp, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[11],[12],[13]   0 [8],[11],[12],[13]   0 [4],[5],[14],[23]          
Investment, Identifier [Axis]: OG III B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,613,000 [7],[8],[12],[19]   3,613,000 [7],[8],[12],[19]   3,241,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: ORS Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 4,911,000   4,911,000              
Investment, Identifier [Axis]: ORTEC INTERNATIONAL NEWCO B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,074,000 [7],[8],[12],[19]   1,074,000 [7],[8],[12],[19]   931,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 18,125,000 [8],[11],[12]   18,125,000 [8],[11],[12]   13,901,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 196,000 [8],[15]   196,000 [8],[15]   151,000 [5]          
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 671,000 [8],[11],[12],[13]   671,000 [8],[11],[12],[13]   430,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 2,358,000 [8],[15]   2,358,000 [8],[15]   742,000 [5],[16]          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 2,438,000 [8]   2,438,000 [8]   2,873,000 [5]          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Super Senior Takeback Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5]         549,000          
Investment, Identifier [Axis]: Ocelot Holdco LLC, Takeback Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,933,000 [8]   2,933,000 [8]   2,933,000 [4],[5]          
Investment, Identifier [Axis]: Ocular Therapeutix, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,837,000 [7],[8],[12],[22]   4,837,000 [7],[8],[12],[22]   4,849,000 [4],[5],[10],[23]          
Investment, Identifier [Axis]: Offen Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5],[18],[23]         3,681,000          
Investment, Identifier [Axis]: Oracle Vision Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,955,000 [7],[8],[12],[31]   2,955,000 [7],[8],[12],[31]   2,802,000 [4],[5],[10],[32]          
Investment, Identifier [Axis]: Origin Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 345,000 [7],[8],[12],[19]   345,000 [7],[8],[12],[19]   301,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: Origin Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 528,000 [7],[8],[11],[12]   528,000 [7],[8],[11],[12]   522,000 [3],[4],[5],[10]          
Investment, Identifier [Axis]: Owl Intermediate Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 2,456,000   2,456,000              
Investment, Identifier [Axis]: Owl Intermediate Holdings, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (20,000)   (20,000)              
Investment, Identifier [Axis]: PDQ.Com Corporation, Class A-2 Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 32,000 [8],[15]   32,000 [8],[15]   42,000 [5],[16]          
Investment, Identifier [Axis]: PDQ.Com Corporation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 18,368,000 [8],[11],[12],[13]   18,368,000 [8],[11],[12],[13]   14,514,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 949,000 [7],[8],[12],[19]   949,000 [7],[8],[12],[19]   844,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,394,000 [7],[8],[11],[12]   1,394,000 [7],[8],[11],[12]   1,408,000 [3],[4],[5],[10]          
Investment, Identifier [Axis]: Panoche Energy Center LLC, First Lien Senior Secured Bond                    
Schedule of Investments [Line Items]                    
Fair Value 3,046,000 [8]   3,046,000 [8]   3,695,000 [5]          
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,780,000 [7],[8],[12],[19]   2,780,000 [7],[8],[12],[19]   2,688,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,400,000 [7],[8],[11],[12]   1,400,000 [7],[8],[11],[12]   1,500,000 [3],[4],[5],[10]          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[14],[23]         609,000          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[22] 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 [8],[12],[22] 593,000   593,000              
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 350,000 [8],[15]   350,000 [8],[15]   263,000 [5],[16]          
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [8] 38,000   38,000              
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 2,116,000 [7],[8],[12],[19]   2,116,000 [7],[8],[12],[19]   2,045,000 [4],[5],[10],[20]          
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 [7],[8],[11],[12]   2,397,000 [7],[8],[11],[12]   2,628,000 [3],[4],[5],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class A                    
Schedule of Investments [Line Items]                    
Fair Value 180,000 [7],[8]   180,000 [7],[8]   177,000 [5],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 181,000 [7],[8]   181,000 [7],[8]   178,000 [5],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class C                    
Schedule of Investments [Line Items]                    
Fair Value 181,000 [7],[8]   181,000 [7],[8]   180,000 [5],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class D                    
Schedule of Investments [Line Items]                    
Fair Value 180,000 [7],[8]   180,000 [7],[8]   178,000 [5],[10]          
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class E                    
Schedule of Investments [Line Items]                    
Fair Value 9,148,000 [7],[8]   9,148,000 [7],[8]   8,904,000 [5],[10]          
Investment, Identifier [Axis]: Permaconn BidCo Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,715,000 [7],[8],[12],[34]   2,715,000 [7],[8],[12],[34]   2,537,000 [4],[5],[10],[35]          
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 948,000 [8],[12],[22]   948,000 [8],[12],[22]   957,000 [3],[4],[5]          
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,942,000 [8]   1,942,000 [8]   1,229,000 [5]          
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 506,000 [8],[12],[13],[22]   506,000 [8],[12],[13],[22]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Policy Services Company, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 47,578,000 [8],[11],[12]   47,578,000 [8],[11],[12]   52,940,000 [3],[4],[5]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class A                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   1,262,000 [5],[16]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class B                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   426,000 [5],[16]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class CC                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   0 [5],[16]          
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class D                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   122,000 [5],[16]          
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15],[17]   0 [8],[15],[17]   0 [5],[16]          
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 363,000 [8],[12],[17],[22],[25]   363,000 [8],[12],[17],[22],[25]   554,000 [4],[5],[18],[23],[40]          
Investment, Identifier [Axis]: PowerGEM Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,672,000 [8],[11],[12],[13]   9,672,000 [8],[11],[12],[13]   6,710,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: PowerGEM Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[11],[12],[13]   0 [8],[11],[12],[13]   (26,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Premium Franchise Brands, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 7,378,000 [8],[12],[33]   7,378,000 [8],[12],[33]   7,377,000 [3],[4],[5]          
Investment, Identifier [Axis]: Premium Franchise Brands, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,717,000 [8],[12],[33]   2,717,000 [8],[12],[33]   2,694,000 [3],[4],[5]          
Investment, Identifier [Axis]: Premium Invest, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,802,000 [7],[8],[12],[13],[19]   9,802,000 [7],[8],[12],[13],[19]   8,750,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Preqin MC Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[24]         2,789,000          
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,652,000 [8],[12],[22]   7,652,000 [8],[12],[22]   7,662,000 [3],[4],[5]          
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 241,000 [8],[15]   241,000 [8],[15]   249,000 [5],[16]          
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 125,000 [8],[12],[13],[22]   125,000 [8],[12],[13],[22]   (28,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Process Equipment, Inc. (ProcessBarron), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,251,000 [8],[12],[33]   5,251,000 [8],[12],[33]   5,338,000 [4],[5],[24]          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 106,000 [8],[15]   106,000 [8],[15]   237,000 [5],[16]          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,144,000 [8],[11],[12]   5,144,000 [8],[11],[12]   5,134,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 915,000 [8],[11],[12]   915,000 [8],[11],[12]   889,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: ProfitOptics, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,599,000 [8],[12],[22]   1,599,000 [8],[12],[22]   1,613,000 [4],[5],[23]          
Investment, Identifier [Axis]: ProfitOptics, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 416,000 [8],[15]   416,000 [8],[15]   198,000 [5],[16]          
Investment, Identifier [Axis]: ProfitOptics, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 97,000 [8],[12],[13],[22]   97,000 [8],[12],[13],[22]   242,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: ProfitOptics, LLC, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 78,000 [8]   78,000 [8]   76,000 [5]          
Investment, Identifier [Axis]: Proppants Holding, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [5],[18]         0          
Investment, Identifier [Axis]: Protego Bidco B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[26]         1,646,000          
Investment, Identifier [Axis]: Protego Bidco B.V., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[28] 1,599,000   1,599,000              
Investment, Identifier [Axis]: Protego Bidco B.V., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[28] 320,000   320,000              
Investment, Identifier [Axis]: Protego Bidco B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 2,302,000 [7],[8],[12],[28]   2,302,000 [7],[8],[12],[28]   1,974,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: QPE7 SPV1 BidCo Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,817,000 [7],[8],[12],[61]   1,817,000 [7],[8],[12],[61]   1,694,000 [4],[5],[10],[62]          
Investment, Identifier [Axis]: Qima Finance LTD, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[11],[12],[13] 2,786,000   2,786,000              
Investment, Identifier [Axis]: Qualified Industries, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 127,000 [8],[15]   127,000 [8],[15]   61,000 [5],[16]          
Investment, Identifier [Axis]: Qualified Industries, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,864,000 [8],[12],[33]   7,864,000 [8],[12],[33]   2,567,000 [4],[5],[24]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 188,000 [8],[15]   188,000 [8],[15]   175,000 [5],[16]          
Investment, Identifier [Axis]: Qualified Industries, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (4,000) [8],[12],[13],[33]   (4,000) [8],[12],[13],[33]   (5,000) [4],[5],[14],[24]          
Investment, Identifier [Axis]: Questel Unite, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[10]         7,059,000          
Investment, Identifier [Axis]: R1 Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,052,000 [8],[11],[12]   6,052,000 [8],[11],[12]   6,135,000 [4],[5],[23]          
Investment, Identifier [Axis]: R1 Holdings, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,850,000 [8],[11],[12],[13]   1,850,000 [8],[11],[12],[13]   472,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: RA Outdoors, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,349,000 [8],[12],[17],[25],[33]   9,349,000 [8],[12],[17],[25],[33]   12,732,000 [3],[4],[5],[18]          
Investment, Identifier [Axis]: RA Outdoors, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 894,000 [8],[12],[17],[25],[33]   894,000 [8],[12],[17],[25],[33]   1,217,000 [3],[4],[5],[18]          
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15]   0 [8],[15]   4,595,000 [5],[16]          
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,277,000 [8],[11],[12]   2,277,000 [8],[11],[12]   1,015,000 [3],[4],[5]          
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, First Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,074,000 [8],[11],[12]   1,074,000 [8],[11],[12]   2,577,000 [3],[4],[5]          
Investment, Identifier [Axis]: RKD Group, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 12,057,000   12,057,000              
Investment, Identifier [Axis]: RKD Group, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 472,000   472,000              
Investment, Identifier [Axis]: ROI Solutions LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 18,131,000 [8],[11],[12],[13]   18,131,000 [8],[11],[12],[13]   17,973,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: ROI Solutions LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (13,000) [8],[11],[12],[13]   (13,000) [8],[11],[12],[13]   (55,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: RPX Corporation, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 21,582,000 [8],[12],[22]   21,582,000 [8],[12],[22]   21,638,000 [3],[4],[5]          
Investment, Identifier [Axis]: RPX Corporation, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (24,000) [8],[12],[13],[22]   (24,000) [8],[12],[13],[22]   (39,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Class A Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15],[17]   0 [8],[15],[17]   0 [5],[16],[18]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Class B Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15],[17]   0 [8],[15],[17]   0 [5],[16],[18]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Class C Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 42,000 [8],[15],[17]   42,000 [8],[15],[17]   57,000 [5],[16],[18]          
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[15],[17]   0 [8],[15],[17]   0 [5],[16],[18]          
Investment, Identifier [Axis]: Randys Holdings, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 704,000   704,000              
Investment, Identifier [Axis]: Randys Holdings, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,329,000 [8],[11],[12],[13]   12,329,000 [8],[11],[12],[13]   10,873,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Randys Holdings, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16]         622,000          
Investment, Identifier [Axis]: Randys Holdings, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 1,144,000 [8],[11],[12],[13]   1,144,000 [8],[11],[12],[13]   613,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Rapid Buyer LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,224,000 [8],[11],[12],[13]   5,224,000 [8],[11],[12],[13]   5,313,000 [4],[5],[14],[24]          
Investment, Identifier [Axis]: Rapid Buyer LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 413,000 [8],[15]   413,000 [8],[15]   533,000 [5],[16]          
Investment, Identifier [Axis]: Rapid Buyer LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (35,000) [8],[11],[12],[13]   (35,000) [8],[11],[12],[13]   (22,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Real Chemistry Intermediate III, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] 3,665,000   3,665,000              
Investment, Identifier [Axis]: Real Chemistry Intermediate III, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] (4,000)   (4,000)              
Investment, Identifier [Axis]: Recovery Point Systems, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,206,000 [8],[11],[12]   11,206,000 [8],[11],[12]   11,294,000 [3],[4],[5]          
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 95,000 [8],[15]   95,000 [8],[15]   81,000 [5],[16]          
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,439,000 [8],[11],[12]   4,439,000 [8],[11],[12]   4,308,000 [3],[4],[5]          
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 140,000 [8],[15]   140,000 [8],[15]   85,000 [5],[16]          
Investment, Identifier [Axis]: Resolute Investment Managers, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 67,000 [8],[15],[17]   67,000 [8],[15],[17]   98,000 [5],[16],[18]          
Investment, Identifier [Axis]: Rhondda Financing No. 1 DAC, Structured - Junior Note                    
Schedule of Investments [Line Items]                    
Fair Value [5],[10],[14]         26,044,000          
Investment, Identifier [Axis]: Riedel Beheer B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,215,000 [7],[8],[12],[19]   2,215,000 [7],[8],[12],[19]   1,963,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: Rocade Holdings LLC, Common LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,198,000 [8],[39]   1,198,000 [8],[39]   243,000 [5],[16],[48],[49] 844,000 [49]        
Investment, Identifier [Axis]: Rocade Holdings LLC, Preferred LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 89,559,000 [8],[11],[13],[39]   89,559,000 [8],[11],[13],[39]   83,000,000 [3],[5],[14],[48],[49] 73,113,000 [49]        
Investment, Identifier [Axis]: Rock Labor LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,449,000 [8],[12],[22]   6,449,000 [8],[12],[22]   6,426,000 [3],[4],[5]          
Investment, Identifier [Axis]: Rock Labor LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,368,000 [8]   1,368,000 [8]   1,127,000 [5]          
Investment, Identifier [Axis]: Rock Labor LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (7,000) [8],[11],[12],[13]   (7,000) [8],[11],[12],[13]   (19,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Royal Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         8,098,000          
Investment, Identifier [Axis]: Royal Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[14]         (2,000)          
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         6,792,000          
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[25] 2,412,000   2,412,000              
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[22] 6,000   6,000              
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] 0   0              
Investment, Identifier [Axis]: Russell Investments US Institutional Holdco, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 516,000 [8],[11],[12]   516,000 [8],[11],[12]   508,000 [3],[4],[5]          
Investment, Identifier [Axis]: SBP Holdings LP, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 8,624,000 [8],[12],[13],[22]   8,624,000 [8],[12],[13],[22]   8,648,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: SBP Holdings LP, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (5,000) [8],[12],[13],[22]   (5,000) [8],[12],[13],[22]   (13,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: SCP Medical Products, LLC., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 2,016,000   2,016,000              
Investment, Identifier [Axis]: SCP Medical Products, LLC., LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 52,000   52,000              
Investment, Identifier [Axis]: SCP Medical Products, LLC., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (2,000)   (2,000)              
Investment, Identifier [Axis]: SISU ACQUISITIONCO., INC., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,956,000 [8],[11],[12]   6,956,000 [8],[11],[12]   6,591,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 195,000 [8],[15]   195,000 [8],[15]   280,000 [5],[16]          
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,237,000 [8],[11],[12],[13]   7,237,000 [8],[11],[12],[13]   6,990,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (14,000) [8],[11],[12],[13]   (14,000) [8],[11],[12],[13]   (18,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: SSCP Pegasus Midco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,087,000 [7],[8],[12],[29]   7,087,000 [7],[8],[12],[29]   4,368,000 [4],[5],[10],[14],[30]          
Investment, Identifier [Axis]: SSCP Spring Bidco 3 Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,019,000 [7],[8],[12],[31]   1,019,000 [7],[8],[12],[31]   941,000 [4],[5],[10],[32]          
Investment, Identifier [Axis]: SVI International LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 641,000 [8],[11],[12]   641,000 [8],[11],[12]   583,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: SVI International LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 364,000 [8]   364,000 [8]   277,000 [5]          
Investment, Identifier [Axis]: SVI International LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[11],[12],[13]   0 [8],[11],[12],[13]   (1,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Saab Purchaser, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,525,000 [8],[11],[12]   13,525,000 [8],[11],[12]   17,592,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Saab Purchaser, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (24,000) [8],[11],[12],[13]   (24,000) [8],[11],[12],[13]   (24,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Safety Products Holdings, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,697,000 [8],[11],[12]   14,697,000 [8],[11],[12]   14,812,000 [3],[4],[5]          
Investment, Identifier [Axis]: Safety Products Holdings, LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value 504,000 [8],[15]   504,000 [8],[15]   537,000 [5],[16]          
Investment, Identifier [Axis]: Sanoptis S.A.R.L., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 4,250,000 [7],[8],[12],[13],[28]   4,250,000 [7],[8],[12],[13],[28]   3,692,000 [4],[5],[10],[14],[26]          
Investment, Identifier [Axis]: Sanoptis S.A.R.L., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 3,256,000 [7],[8],[12],[63]   3,256,000 [7],[8],[12],[63]   2,788,000 [4],[5],[10],[53]          
Investment, Identifier [Axis]: Sanoptis S.A.R.L., First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[53]         46,000          
Investment, Identifier [Axis]: Sansidor BV, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,020,000 [7],[8],[12],[13],[19]   1,020,000 [7],[8],[12],[13],[19]   534,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Scaled Agile, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,589,000 [8],[11],[12]   1,589,000 [8],[11],[12]   1,605,000 [3],[4],[5]          
Investment, Identifier [Axis]: Scaled Agile, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 299,000 [8],[11],[12]   299,000 [8],[11],[12]   302,000 [3],[4],[5]          
Investment, Identifier [Axis]: Scout Bidco B.V., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 3,525,000 [7],[8],[12],[28]   3,525,000 [7],[8],[12],[28]   3,297,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: Scout Bidco B.V., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 416,000 [7],[8],[12],[33]   416,000 [7],[8],[12],[33]   442,000 [3],[4],[5],[10]          
Investment, Identifier [Axis]: Scout Bidco B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 384,000 [7],[8],[12],[13],[28]   384,000 [7],[8],[12],[13],[28]   (14,000) [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Screenvision, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 5,102,000   5,102,000              
Investment, Identifier [Axis]: Screenvision, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (11,000)   (11,000)              
Investment, Identifier [Axis]: Screenvision, LLC, Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 32,545,000   32,545,000              
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,823,000   6,823,000   6,655,000 [43] 6,328,000 [43]        
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series A                    
Schedule of Investments [Line Items]                    
Fair Value 460,000   460,000   399,000 [43] 311,000 [43]        
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series B                    
Schedule of Investments [Line Items]                    
Fair Value 42,946,000   42,946,000   37,296,000 [43] 29,080,000 [43]        
Investment, Identifier [Axis]: Security Holdings B.V, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 6,227,000   6,227,000   5,333,000 [43] 3,866,000 [43]        
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,543,000   11,543,000   11,191,000 [43] 10,867,000 [43]        
Investment, Identifier [Axis]: Security Holdings B.V, Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,845,000   2,845,000   2,293,000 [43] 2,236,000 [43]        
Investment, Identifier [Axis]: Security Holdings B.V., Bridge Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,823,000 [7],[8],[57],[58]   6,823,000 [7],[8],[57],[58]   6,655,000 [5],[10],[42],[56]          
Investment, Identifier [Axis]: Security Holdings B.V., Common Stock Series A                    
Schedule of Investments [Line Items]                    
Fair Value 460,000 [7],[8],[15],[57],[58]   460,000 [7],[8],[15],[57],[58]   399,000 [5],[10],[16],[42],[56]          
Investment, Identifier [Axis]: Security Holdings B.V., Common Stock Series B                    
Schedule of Investments [Line Items]                    
Fair Value 42,946,000 [7],[8],[57],[58]   42,946,000 [7],[8],[57],[58]   37,296,000 [5],[10],[16],[42],[56]          
Investment, Identifier [Axis]: Security Holdings B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 6,227,000 [7],[8],[13],[57],[58]   6,227,000 [7],[8],[13],[57],[58]   5,333,000 [5],[10],[14],[42],[56]          
Investment, Identifier [Axis]: Security Holdings B.V., Senior Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,543,000 [7],[8],[57],[58]   11,543,000 [7],[8],[57],[58]   11,191,000 [5],[10],[42],[56]          
Investment, Identifier [Axis]: Security Holdings B.V., Senior Unsecured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,845,000 [7],[8],[57],[58]   2,845,000 [7],[8],[57],[58]   2,293,000 [5],[10],[42],[56]          
Investment, Identifier [Axis]: Selenium Designated Activity Company, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[36] 3,167,000   3,167,000              
Investment, Identifier [Axis]: Sereni Capital NV, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[26]         903,000          
Investment, Identifier [Axis]: Sereni Capital NV, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[26]         1,524,000          
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 895,000 [15]   895,000 [15]   655,000 [16]          
Investment, Identifier [Axis]: Shelf Bidco Ltd, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 4,620,000 [7],[8],[17]   4,620,000 [7],[8],[17]   4,668,000 [5],[10]          
Investment, Identifier [Axis]: Shelf Bidco Ltd, Second Out Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,070,000 [7],[8],[11],[12]   12,070,000 [7],[8],[11],[12]   12,153,000 [3],[4],[5],[10]          
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value [10],[18],[48],[54]         41,453,000          
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 38,338,000 [7],[17],[39],[55]   38,338,000 [7],[17],[39],[55]   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 1,980,000 [7],[8],[12],[13],[19]   1,980,000 [7],[8],[12],[13],[19]   1,858,000 [4],[5],[10],[14],[26]          
Investment, Identifier [Axis]: Skyvault Holdings LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 15,641,000 [8],[13],[39]   15,641,000 [8],[13],[39]   3,586,000 [5],[14],[48]          
Investment, Identifier [Axis]: Skyvault Holdings LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 15,641,000   15,641,000   3,586,000 [49] 0 [49]        
Investment, Identifier [Axis]: Skyvault Holdings LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 5,214,000 [8],[15],[39]   5,214,000 [8],[15],[39]   1,195,000 [5],[16],[48]          
Investment, Identifier [Axis]: Skyvault Holdings LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 5,214,000   5,214,000   1,195,000 [49] 0 [49]        
Investment, Identifier [Axis]: SmartShift Group, Inc., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 568,000 [8],[15]   568,000 [8],[15]   483,000 [5],[16]          
Investment, Identifier [Axis]: SmartShift Group, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,846,000 [8],[12],[33]   12,846,000 [8],[12],[33]   12,944,000 [3],[4],[5]          
Investment, Identifier [Axis]: SmartShift Group, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[12],[13],[33]   0 [8],[12],[13],[33]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Smartling, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 10,357,000 [8],[12],[33]   10,357,000 [8],[12],[33]   10,437,000 [3],[4],[5]          
Investment, Identifier [Axis]: Smartling, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[12],[13],[33]   0 [8],[12],[13],[33]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Smile Brands Group Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 4,592,000   4,592,000              
Investment, Identifier [Axis]: Smile Brands Group Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         1,230,000          
Investment, Identifier [Axis]: Smile Brands Group Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         3,477,000          
Investment, Identifier [Axis]: Solo Buyer, L.P., Common Equity                    
Schedule of Investments [Line Items]                    
Fair Value 300,000 [8]   300,000 [8]   325,000 [5],[16]          
Investment, Identifier [Axis]: Solo Buyer, L.P., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,851,000 [8],[11],[12]   14,851,000 [8],[11],[12]   14,826,000 [3],[4],[5]          
Investment, Identifier [Axis]: Solo Buyer, L.P., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 816,000 [8],[11],[12],[13]   816,000 [8],[11],[12],[13]   466,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Sonicwall US Holdings Inc, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [11],[12] 2,742,000   2,742,000              
Investment, Identifier [Axis]: Sound Point CLO XX, Ltd., Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 32,000 [7],[15],[17]   32,000 [7],[15],[17]   61,000 [10],[16],[18]          
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 2,282,000 [8],[11],[12]   2,282,000 [8],[11],[12]   2,057,000 [4],[5],[14],[24]          
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[11],[12],[13]   0 [8],[11],[12],[13]   (1,000) [4],[5],[14],[24]          
Investment, Identifier [Axis]: Spatial Business Systems LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 14,654,000 [8],[12],[22]   14,654,000 [8],[12],[22]   14,706,000 [3],[4],[5]          
Investment, Identifier [Axis]: Spatial Business Systems LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (14,000) [8],[12],[13],[22]   (14,000) [8],[12],[13],[22]   (21,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Starnmeer B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,472,000 [7],[8],[12],[33]   2,472,000 [7],[8],[12],[33]   2,500,000 [4],[5],[10],[24]          
Investment, Identifier [Axis]: Superjet Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,171,000 [8],[11],[12],[13]   7,171,000 [8],[11],[12],[13]   17,712,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Superjet Buyer, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (18,000) [8],[11],[12],[13]   (18,000) [8],[11],[12],[13]   (38,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Swoop Intermediate III, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] 1,977,000   1,977,000              
Investment, Identifier [Axis]: Swoop Intermediate III, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] 0   0              
Investment, Identifier [Axis]: Syniverse Holdings, Inc., Series A Preferred Equity                    
Schedule of Investments [Line Items]                    
Fair Value 11,136,000 [8]   11,136,000 [8]   10,076,000 [5]          
Investment, Identifier [Axis]: TA KHP Aggregator, L.P., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 47,000   47,000              
Investment, Identifier [Axis]: TA KHP Aggregator, L.P., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 1,013,000   1,013,000              
Investment, Identifier [Axis]: TA KHP Aggregator, L.P., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] (4,000)   (4,000)              
Investment, Identifier [Axis]: TA KHP Aggregator, L.P., Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8] 2,224,000   2,224,000              
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 91,000 [8],[15]   91,000 [8],[15]   84,000 [5],[16]          
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 3,148,000 [8]   3,148,000 [8]   2,785,000 [5]          
Investment, Identifier [Axis]: TAPCO Buyer LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 9,491,000 [8],[12],[22]   9,491,000 [8],[12],[22]   13,517,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: TAPCO Buyer LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 451,000 [8],[15]   451,000 [8],[15]   252,000 [5],[16]          
Investment, Identifier [Axis]: TAPCO Buyer LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (18,000) [8],[12],[13],[22]   (18,000) [8],[12],[13],[22]   (44,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: THG Acquisition, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 5,114,000 [8],[12],[13],[22]   5,114,000 [8],[12],[13],[22]   10,187,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: THG Acquisition, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 102,000 [8],[12],[13],[22]   102,000 [8],[12],[13],[22]   97,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 14,111,000   14,111,000              
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         2,572,000          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         953,000          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         1,192,000          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 4                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[14]         7,837,000          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 33,000 [8]   33,000 [8]   26,000 [5]          
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[11],[12],[13]   0 [8],[11],[12],[13]   (4,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Tank Holding Corp, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 7,763,000 [8],[12],[22]   7,763,000 [8],[12],[22]   7,792,000 [4],[5],[24]          
Investment, Identifier [Axis]: Tank Holding Corp, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 2,996,000 [8],[12],[22]   2,996,000 [8],[12],[22]   2,868,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: Tank Holding Corp, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (9,000) [8],[12],[13],[22]   (9,000) [8],[12],[13],[22]   (12,000) [4],[5],[14],[24]          
Investment, Identifier [Axis]: Tanqueray Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,776,000 [7],[8],[12],[13],[29]   1,776,000 [7],[8],[12],[13],[29]   1,643,000 [4],[5],[10],[14],[30]          
Investment, Identifier [Axis]: Team Air Distributing, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [5]         35,000          
Investment, Identifier [Axis]: Team Air Distributing, LLC, Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 429,000 [8],[15]   429,000 [8],[15]   625,000 [5],[16]          
Investment, Identifier [Axis]: Team Air Distributing, LLC, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 741,000 [8]   741,000 [8]   702,000 [5]          
Investment, Identifier [Axis]: Technology Service Stream BidCo Pty Ltd, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 812,000 [7],[8],[12],[13],[34]   812,000 [7],[8],[12],[13],[34]   677,000 [4],[5],[10],[14],[21]          
Investment, Identifier [Axis]: Techone B.V., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,112,000 [7],[8],[12],[19]   4,112,000 [7],[8],[12],[19]   3,609,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: Techone B.V., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (2,000) [7],[8],[12],[13],[19]   (2,000) [7],[8],[12],[13],[19]   (4,000) [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,688,000 [8],[11],[12],[13]   6,688,000 [8],[11],[12],[13]   8,364,000 [3],[4],[5]          
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (24,000) [8],[11],[12],[13]   (24,000) [8],[11],[12],[13]   (18,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: Terrybear, Inc., Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 14,000 [8],[15]   14,000 [8],[15]   120,000 [5],[16]          
Investment, Identifier [Axis]: Terrybear, Inc., Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 265,000 [8]   265,000 [8]   268,000 [5]          
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 13,682,000 [8],[11],[12],[13]   13,682,000 [8],[11],[12],[13]   2,647,000 [3],[4],[5]          
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (20,000) [8],[11],[12],[13]   (20,000) [8],[11],[12],[13]   0 [3],[4],[5],[14]          
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[24]         3,791,000          
Investment, Identifier [Axis]: The Octave Music Group, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 59,000 [11],[12]   59,000 [11],[12]   3,595,000 [3],[4]          
Investment, Identifier [Axis]: The Octave Music Group, Inc., Partnership Equity                    
Schedule of Investments [Line Items]                    
Fair Value 1,963,000 [8],[15]   1,963,000 [8],[15]   2,180,000 [5]          
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 [16],[48],[54]         7,208,000          
Investment, Identifier [Axis]: Thompson Rivers LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 4,768,000 [15],[39],[55]   4,768,000 [15],[39],[55]   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 8,304,000 [8],[11],[12]   8,304,000 [8],[11],[12]   8,518,000 [3],[4],[5]          
Investment, Identifier [Axis]: Trident Maritime Systems, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,237,000 [8],[11],[12]   13,237,000 [8],[11],[12]   14,420,000 [3],[4],[5]          
Investment, Identifier [Axis]: Trintech, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,815,000 [8],[12],[22]   6,815,000 [8],[12],[22]   6,787,000 [4],[5],[23]          
Investment, Identifier [Axis]: Trintech, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 151,000 [8],[12],[13],[22]   151,000 [8],[12],[13],[22]   145,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: True Religion Apparel, Inc., Class A Units                    
Schedule of Investments [Line Items]                    
Fair Value [5],[16],[18]         0          
Investment, Identifier [Axis]: Turbo Buyer, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,782,000 [8],[11],[12]   7,782,000 [8],[11],[12]   7,754,000 [3],[4],[5]          
Investment, Identifier [Axis]: Turnberry Solutions, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,836,000 [8],[12],[22]   4,836,000 [8],[12],[22]   4,874,000 [4],[5],[23]          
Investment, Identifier [Axis]: UBC Ledgers Holding AB, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 770,000 [7],[8],[12],[19]   770,000 [7],[8],[12],[19]   536,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: UBC Ledgers Holding AB, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 1,704,000 [7],[8],[12],[13],[64]   1,704,000 [7],[8],[12],[13],[64]   1,450,000 [4],[5],[10],[14],[38]          
Investment, Identifier [Axis]: UHY Advisors, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 7,793,000 [8],[11],[12],[13]   7,793,000 [8],[11],[12],[13]   12,982,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: UHY Advisors, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 273,000 [8],[11],[12],[13]   273,000 [8],[11],[12],[13]   (35,000) [3],[4],[5],[14]          
Investment, Identifier [Axis]: UKFast Leaders Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,334,000 [7],[8],[12],[29]   12,334,000 [7],[8],[12],[29]   11,041,000 [4],[5],[10],[30]          
Investment, Identifier [Axis]: US Bank National Association Series 2025-1, Structured Note - Class R                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[11],[12] 5,843,000   5,843,000              
Investment, Identifier [Axis]: US Bank National Association Series 2025-2, Structured Note - Class R                    
Schedule of Investments [Line Items]                    
Fair Value [7],[12],[22] 5,000,000   5,000,000              
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 17,921,000   17,921,000              
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 [3],[4],[5]         12,487,000          
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 [3],[4],[5]         5,411,000          
Investment, Identifier [Axis]: Union Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 1,048,000 [7],[8],[12],[13],[31]   1,048,000 [7],[8],[12],[13],[31]   930,000 [4],[5],[10],[14],[32]          
Investment, Identifier [Axis]: United Therapy Holding III GmbH, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[14],[20]         1,204,000          
Investment, Identifier [Axis]: Unither (Uniholding), First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,227,000 [7],[8],[12],[13],[19]   2,227,000 [7],[8],[12],[13],[19]   1,962,000 [4],[5],[10],[14],[20]          
Investment, Identifier [Axis]: Unosquare, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] 2,363,000   2,363,000              
Investment, Identifier [Axis]: Unosquare, LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 261,000   261,000              
Investment, Identifier [Axis]: Unosquare, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value [8],[12],[13],[22] (9,000)   (9,000)              
Investment, Identifier [Axis]: Utac Ceram, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 1,812,000 [7],[8],[12],[19]   1,812,000 [7],[8],[12],[19]   1,500,000 [4],[5],[10],[20]          
Investment, Identifier [Axis]: Utac Ceram, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 3,616,000 [7],[8],[11],[12]   3,616,000 [7],[8],[11],[12]   2,471,000 [3],[4],[5],[10]          
Investment, Identifier [Axis]: Utac Ceram, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[10]         943,000          
Investment, Identifier [Axis]: VB Spine Intermediary II LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12] 43,695,000   43,695,000              
Investment, Identifier [Axis]: VB Spine Intermediary II LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value [8],[15] 0   0              
Investment, Identifier [Axis]: VOYA CLO 2015-2, LTD., Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 45,000 [7],[15],[17]   45,000 [7],[15],[17]   15,000 [10],[16],[18]          
Investment, Identifier [Axis]: VOYA CLO 2016-2, LTD., Subordinated Structured Notes                    
Schedule of Investments [Line Items]                    
Fair Value 1,000 [7],[15],[17]   1,000 [7],[15],[17]   1,072,000 [10],[16],[18]          
Investment, Identifier [Axis]: Validity, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[23]         4,783,000          
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 2,000 [8],[15],[17]   2,000 [8],[15],[17]   2,000 [5],[16],[18]          
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Warrants                    
Schedule of Investments [Line Items]                    
Fair Value 3,000 [8],[15],[17]   3,000 [8],[15],[17]   3,000 [5],[16],[18]          
Investment, Identifier [Axis]: Victoria Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,016,000 [7],[8],[12],[31]   4,016,000 [7],[8],[12],[31]   3,787,000 [4],[5],[10],[32]          
Investment, Identifier [Axis]: Vision Solutions Inc., Second Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 6,194,000 [11],[12],[17]   6,194,000 [11],[12],[17]   6,256,000 [3],[4],[18]          
Investment, Identifier [Axis]: Vista Global Holding Ltd, Structured Secured Note - Class C                    
Schedule of Investments [Line Items]                    
Fair Value 484,000 [7]   484,000 [7]   495,000 [5],[10]          
Investment, Identifier [Axis]: VistaJet Pass Through Trust 2021-1B, Structured Secured Note - Class B                    
Schedule of Investments [Line Items]                    
Fair Value [5]         3,160,000          
Investment, Identifier [Axis]: Vital Buyer, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 17,776,000 [8],[11],[12]   17,776,000 [8],[11],[12]   7,241,000 [3],[4],[5]          
Investment, Identifier [Axis]: Vital Buyer, LLC, Partnership Units                    
Schedule of Investments [Line Items]                    
Fair Value 433,000 [8]   433,000 [8]   388,000 [5]          
Investment, Identifier [Axis]: W2O Holdings, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         11,772,000          
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 10,795,000   10,795,000              
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[14]         2,502,000          
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         5,959,000          
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[14]         1,816,000          
Investment, Identifier [Axis]: WWEC Holdings III Corp, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 12,055,000 [8],[11],[12]   12,055,000 [8],[11],[12]   12,050,000 [3],[4],[5]          
Investment, Identifier [Axis]: WWEC Holdings III Corp, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (15,000) [8],[11],[12],[13]   (15,000) [8],[11],[12],[13]   (35,000) [3],[4],[5],[14]          
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],[48],[54]         10,730,000          
Investment, Identifier [Axis]: Waccamaw River LLC, Member Interest                    
Schedule of Investments [Line Items]                    
Fair Value 5,543,000 [7],[39],[55]   5,543,000 [7],[39],[55]   10,730,000 $ 15,470,000        
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [8],[11],[12],[13] 12,868,000   12,868,000              
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5]         1,802,000          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[14]         (36,000)          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., First Lien Senior Secured Term Loan 3                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[23]         8,525,000          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., LP Units                    
Schedule of Investments [Line Items]                    
Fair Value 1,105,000 [8],[15]   1,105,000 [8],[15]   975,000 [5],[16]          
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 975,000 [8],[11],[12],[13]   975,000 [8],[11],[12],[13]   993,000 [4],[5],[14],[23]          
Investment, Identifier [Axis]: White Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [3],[4],[5],[10],[14]         1,747,000          
Investment, Identifier [Axis]: White Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[11],[12] 1,723,000   1,723,000              
Investment, Identifier [Axis]: White Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[11],[12] 518,000   518,000              
Investment, Identifier [Axis]: Woodland Foods, LLC, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,417,000 [8],[15]   1,417,000 [8],[15]   1,271,000 [5],[16]          
Investment, Identifier [Axis]: Woodland Foods, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 17,078,000 [8],[11],[12]   17,078,000 [8],[11],[12]   6,097,000 [3],[4],[5]          
Investment, Identifier [Axis]: Woodland Foods, LLC, Preferred Stock                    
Schedule of Investments [Line Items]                    
Fair Value [5]         427,000          
Investment, Identifier [Axis]: Woodland Foods, LLC, Preferred Stock 1                    
Schedule of Investments [Line Items]                    
Fair Value [8] 494,000   494,000              
Investment, Identifier [Axis]: Woodland Foods, LLC, Preferred Stock 2                    
Schedule of Investments [Line Items]                    
Fair Value [8] 136,000   136,000              
Investment, Identifier [Axis]: Woodland Foods, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value (28,000) [8],[11],[12],[13]   (28,000) [8],[11],[12],[13]   1,043,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: World 50, Inc., First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 13,792,000 [8],[12],[33]   13,792,000 [8],[12],[33]   13,785,000 [4],[5],[23]          
Investment, Identifier [Axis]: World 50, Inc., Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 0 [8],[12],[13],[33]   0 [8],[12],[13],[33]   (8,000) [4],[5],[14],[23]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Common Stock                    
Schedule of Investments [Line Items]                    
Fair Value 1,230,000 [7],[8],[15]   1,230,000 [7],[8],[15]   572,000 [5],[10],[16]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 328,000 [7],[8],[12],[28]   328,000 [7],[8],[12],[28]   283,000 [4],[5],[10],[26]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 9,455,000 [7],[8],[12],[13],[31]   9,455,000 [7],[8],[12],[13],[31]   8,598,000 [4],[5],[10],[32]          
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Subordinated Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 4,395,000 [7],[8]   4,395,000 [7],[8]   3,691,000 [5],[10]          
Investment, Identifier [Axis]: ZB Holdco LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 11,511,000 [8],[11],[12],[13]   11,511,000 [8],[11],[12],[13]   9,053,000 [3],[4],[5]          
Investment, Identifier [Axis]: ZB Holdco LLC, LLC Units                    
Schedule of Investments [Line Items]                    
Fair Value 298,000 [8],[15]   298,000 [8],[15]   197,000 [5],[16]          
Investment, Identifier [Axis]: ZB Holdco LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value 907,000 [8],[11],[12],[13]   907,000 [8],[11],[12],[13]   495,000 [3],[4],[5],[14]          
Investment, Identifier [Axis]: Zelda Luxco S.A.S, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[12],[13],[28] 1,700,000   1,700,000              
Investment, Identifier [Axis]: Zeppelin Bidco Limited, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value [4],[5],[10],[32]         4,691,000          
Investment, Identifier [Axis]: Zeppelin Bidco Limited, First Lien Senior Secured Term Loan 1                    
Schedule of Investments [Line Items]                    
Fair Value 2,294,000 [7],[8],[12],[31],[39]   2,294,000 [7],[8],[12],[31],[39]   0          
Investment, Identifier [Axis]: Zeppelin Bidco Limited, First Lien Senior Secured Term Loan 2                    
Schedule of Investments [Line Items]                    
Fair Value 273,000 [7],[8],[12],[31],[39]   273,000 [7],[8],[12],[31],[39]   0          
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Ordinary Shares                    
Schedule of Investments [Line Items]                    
Fair Value [7],[8],[15],[39] 0   0              
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Ordinary shares                    
Schedule of Investments [Line Items]                    
Fair Value 0   0   0          
Investment, Identifier [Axis]: eShipping, LLC, First Lien Senior Secured Term Loan                    
Schedule of Investments [Line Items]                    
Fair Value 2,971,000 [8],[12],[22]   2,971,000 [8],[12],[22]   3,465,000 [4],[5],[23]          
Investment, Identifier [Axis]: eShipping, LLC, Revolver                    
Schedule of Investments [Line Items]                    
Fair Value $ 99,000 [8],[12],[13],[22]   $ 99,000 [8],[12],[13],[22]   $ 0 [4],[5],[14],[23]          
[1] All of the investment is or will be encumbered as security for the Company’s $0.7 billion senior secured credit facility with ING Capital LLC (“ING”) initially entered into in February 2019 (as amended, restated and otherwise modified from time to time, the “February 2019 Credit Facility”).
[2] All of the investment is or will be encumbered as security for the Company’s $0.8 billion February 2019 Credit Facility with ING.
[3] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2024 was 4.30510%.
[4] Debt investment includes interest rate floor feature.
[5] The fair value of the investment was determined using significant unobservable inputs.
[6] PIK non-accrual investment.
[7] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 24.1% of total investments at fair value as of September 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).
[8] The fair value of the investment was determined using significant unobservable inputs.
[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] The interest rate on these loans is subject to 3 Month SOFR, which as of September 30, 2025 was 3.97639%.
[12] Debt investment includes interest rate floor feature.
[13] Position or portion thereof is an unfunded loan or equity commitment.
[14] Position or portion thereof is an unfunded loan or equity commitment.
[15] Investment is non-income producing.
[16] Investment is non-income producing.
[17] Investment was purchased as part of the Sierra Merger and is part of the Sierra Reference Portfolio for purposes of the Sierra Credit Support Agreement.
[18] Investment was purchased as part of the Sierra Merger and is part of the Sierra Reference Portfolio for purposes of the Sierra Credit Support Agreement.
[19] The interest rate on these loans is subject to 3 Month EURIBOR, which as of September 30, 2025 was 2.03200%.
[20] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2024 was 2.71400%.
[21] The interest rate on these loans is subject to 6 Month BBSY, which as of December 31, 2024 was 4.49250%.
[22] The interest rate on these loans is subject to 1 Month SOFR, which as of September 30, 2025 was 4.12920%.
[23] The interest rate on these loans is subject to 1 Month SOFR, which as of December 31, 2024 was 4.33249%.
[24] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2024 was 4.25001%.
[25] Non-accrual investment.
[26] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2024 was 2.56800%.
[27] The interest rate on these loans is subject to 1 Month SONIA, which as of September 30, 2025 was 3.97500%.
[28] The interest rate on these loans is subject to 6 Month EURIBOR, which as of September 30, 2025 was 2.09600%.
[29] The interest rate on these loans is subject to 3 Month SONIA, which as of September 30, 2025 was 3.97260%.
[30] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2024 was 4.62330%.
[31] The interest rate on these loans is subject to 6 Month SONIA, which as of September 30, 2025 was 3.93900%.
[32] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2024 was 4.56370%.
[33] The interest rate on these loans is subject to 6 Month SOFR, which as of September 30, 2025 was 3.84590%.
[34] The interest rate on these loans is subject to 3 Month BBSY, which as of September 30, 2025 was 3.57640%.
[35] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2024 was 4.41630%.
[36] The interest rate on these loans is subject to 1 Month EURIBOR, which as of September 30, 2025 was 1.92900%.
[37] The interest rate on these loans is subject to 1 Month EURIBOR, which as of December 31, 2024 was 2.84500%.
[38] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2024 was 2.54200%.
[39] As defined in the 1940 Act, the Company is deemed to be an “affiliated person” of the portfolio company as the Company owns between 5% or more, up to 25% (inclusive), of the portfolio company’s voting securities (“non-controlled affiliate”). Transactions related to investments in non-controlled “Affiliate Investments” for the nine months ended September 30, 2025 were as follows:
December 31, 2024
Value
Gross Additions
(a)
Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)September 30,
2025
 Value
Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Biolam(d)
First Lien Senior Secured Term Loan (EURIBOR + 4.50%, 12.5% PIK)(e)
$— $1,258 $(53)$$492 $1,699 $(27)
Common Stock
(851,507 shares)
— — — — — — — 
Convertible Bonds
(1,586,655 shares)
— — — — — — — 
Ordinary Shares
(15,191,001 shares)
— — — — — — — 
Preferred Stock A
(41,692 shares)
— — — — — — — 
Preferred Stock A2
(13,538 shares)
— — — — — — — 
Preferred Stock B
(1,529,216 shares)
— — — — — — — 
Preferred Stock C
(11,153 shares)
— — — — — — — 
Preferred Stock O1
(1,336,662 shares)
— — — — — — — 
Preferred Stock O2
(134,616 shares)
— — — — — — — 
Warrants (2,600,000 units)
— — — — — — — 
— 1,258 (53)492 1,699 (27)
Celebration Bidco, LLC(d)
First Lien Senior Secured Term Loan (SOFR + 8.00%, 12.3% PIK)
6,414 619 — — (281)6,752 618 
First Lien Senior Secured Term Loan (SOFR + 8.00%, 12.3% PIK)
— 1,387 — — — 1,387 111 
Common Stock
(1,243,071 shares)
11,262 — — — (3,517)7,745 — 
17,676 2,006 — — (3,798)15,884 728 
Coastal Marina Holdings, LLC(d)
Subordinated Term Loan
(8.0% Cash)
15,770 76 — — 15 15,861 1,070 
Subordinated Term Loan
(8.0% Cash)
7,271 28 — — 14 7,313 486 
LLC Units (3,518,097 units)
16,852 — — — 3,131 19,983 — 
39,893 104 — — 3,160 43,157 1,556 
December 31, 2024
Value
Gross Additions
(a)
Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)September 30,
2025
 Value
Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Eclipse Business Capital, LLC(d)
Revolver (SOFR + 6.50%, 10.8% Cash)
$10,091 $3,009 $(6,092)$— $(8)$7,000 $849 
Second Lien Senior Secured Term Loan (7.5% Cash)
4,545 — — (5)4,545 264 
LLC units (89,447,396 units)
136,855 22 — — 2,661 139,538 12,321 
151,491 3,036 (6,092)— 2,648 151,083 13,434 
Jocassee Partners LLC
9.1% Member Interest
40,761 — — — (1,923)38,838 4,282 
40,761 — — — (1,923)38,838 4,282 
Rocade Holdings LLC(d)
Preferred LP Units (71,000 units) (SOFR + 6.00%, 10.3% PIK)
83,000 6,576 — — (17)89,559 6,576 
Common LP Units (23.8 units)
243 — — — 955 1,198 308 
83,243 6,576 — — 938 90,757 6,884 
Sierra Senior Loan Strategy JV I LLC
89.01% Member Interest
41,453 — — — (3,115)38,338 5,353 
41,453 — — — (3,115)38,338 5,353 
Skyvault Holdings LLC(d)
First Lien Senior Secured Term Loan (12.0% Cash)
3,586 12,236 (181)— — 15,641 927 
LLC Units (4,046,326.8 units)
1,195 4,027 — — (8)5,214 — 
4,781 16,263 (181)— (8)20,855 927 
Thompson Rivers LLC
16.0% Member Interest
7,208 — (2,396)— (44)4,768 — 
7,208 — (2,396)— (44)4,768 — 
Waccamaw River LLC
20% Member Interest
10,730 — (4,925)— (262)5,543 745 
10,730 — (4,925)— (262)5,543 745 
Zeppelin Bidco Limited(d)
First Lien Senior Secured Term Loan (SOFR + 6.50%, 11.3% PIK)
— 2,503 (11)(4,329)4,131 2,294 (6)
First Lien Senior Secured Term Loan (SOFR + 6.50%, 11.3% PIK)
— 305 (506)474 273 — 
Ordinary Shares (879 shares)
— — — — — — — 
— 2,808 (11)(4,835)4,605 2,567 (6)
Total Affiliate Investments$397,236 $32,051 $(13,658)$(4,833)$2,693 $413,489 $33,876 
(a)     Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
(b)    Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
(c) Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Affiliate category.
(d) The fair value of the investment was determined using significant unobservable inputs.
(e) Non-accrual investment
[40] Non-accrual investment.
[41] Non-accrual investment.
[42] As defined in the 1940 Act, the Company is deemed to be both an “affiliated person” and “control” the portfolio company because it owns more than 25% of the portfolio company’s outstanding voting securities or it has the power to exercise control over the management or policies of such portfolio company (including through a management agreement). Transactions as of and during the year ended December 31, 2024 in which the portfolio company is deemed to be a “Control Investment” of the Company were as follows:
December 31, 2023
Value
Gross Additions
(a)
Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31, 2024
 Value
Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Black Angus Steakhouses, LLC(d)
First Lien Senior Secured Term Loan (14.4% PIK)(e)
$7,166 $1,114 $— $— $(5,536)$2,744 $1,028 
First Lien Senior Secured Term Loan (10.0% PIK)(e)
4,869 — — — (4,869)— — 
LLC Units (44.6 units)
— — — — — — — 
12,035 1,114 — — (10,405)2,744 1,028 
MVC Automotive Group GmbH(d)
Bridge Loan (4.5% Cash, 1.5% PIK)
9,762 720 (9,620)(862)— — 495 
Common Equity Interest (18,000 Shares)
15,430 9,620 — — (11,309)13,741 — 
25,192 10,340 (9,620)(862)(11,309)13,741 495 
MVC Private Equity Fund LP
General Partnership Interest
(1,831.4 units)
24 — (17)— (7)— 48 
Limited Partnership Interest
(71,790.4 units)
981 — (678)— (292)11 — 
1,005 — (695)— (299)11 48 
Security Holdings B.V(d)
Bridge Loan (5.0% PIK)
6,328 327 — — — 6,655 326 
Revolver (6.0% Cash)
3,866 1,828 (12)17 (366)5,333 188 
Senior Subordinated Term Loan (3.1% PIK)
10,867 324 — — — 11,191 273 
Senior Unsecured Term Loan (6.0% Cash, 9.0% PIK)
2,236 208 — — (151)2,293 255 
Common Stock Series A (17,100 shares)
311 — — — 88 399 — 
Common Stock Series B (1,236 shares)
29,080 — — — 8,216 37,296 — 
52,688 2,687 (12)17 7,787 63,167 1,042 
Total Control Investments$90,920 $14,141 $(10,327)$(845)$(14,226)$79,663 $2,613 
(a) Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
(b)     Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
(c)    Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Control category.
(d) The fair value of the investment was determined using significant unobservable inputs.
(e) Non-accrual investment.
[43] The fair value of the investment was determined using significant unobservable inputs.
[44] Non-accrual investment.
[45] The interest rate on these loans is subject to 1 Month SONIA, which as of December 31, 2024 was 4.71030%.
[46] The interest rate on these loans is subject to 3 Month CORRA, which as of September 30, 2025 was 2.56000%.
[47] The interest rate on these loans is subject to 3 Month CORRA, which as of December 31, 2024 was 3.15158%.
[48] As defined in the 1940 Act, the Company is deemed to be an “affiliated person” of the portfolio company as the Company owns between 5% or more, up to 25% (inclusive), of the portfolio company’s voting securities (“non-controlled affiliate”). Transactions related to investments in non-controlled “Affiliate Investments” for the year ended December 31, 2024 were as follows:
December 31, 2023
Value
Gross Additions
(a)
Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31, 2024
 Value
Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Celebration Bidco, LLC(d)
First Lien Senior Secured Term Loan (SOFR + 8.00%, 12.6% PIK)
$6,214 $200 $— $— $— $6,414 $837 
Common Stock (1,243,071 shares)
12,177 — — — (915)11,262 — 
18,391 200 — — (915)17,676 837 
Coastal Marina Holdings, LLC(d)
Subordinated Term Loan
(8.0% Cash)
15,649 95 — — 26 15,770 1,428 
Subordinated Term Loan
(8.0% Cash)
6,868 403 — — — 7,271 711 
LLC Units (3,518,097 units)
12,160 5,551 — — (859)16,852 — 
34,677 6,049 — — (833)39,893 2,139 
Eclipse Business Capital, LLC(d)
Revolver (SOFR + 7.25%, 11.9% Cash)
5,545 27,656 (23,091)— (19)10,091 817 
Second Lien Senior Secured Term Loan (7.5% Cash)
4,545 — — (6)4,545 323 
LLC units (89,447,396 units)
145,799 66 — — (9,010)136,855 14,894 
155,889 27,728 (23,091)— (9,035)151,491 16,034 
Hylan Datacom & Electrical LLC(d)
First Lien Senior Secured Term Loan (SOFR + 8.00%, 13.4% Cash)
3,917 172 (3,917)— (172)— 311 
Second Lien Senior Secured Term Loan (SOFR + 3.00%, 8.5% Cash)
4,519 161 (4,680)— — — 181 
Common Stock
(102,144 shares)
2,013 — (1,040)(4,179)3,206 — — 
10,449 333 (9,637)(4,179)3,034 — 492 
Jocassee Partners LLC
9.1% Member Interest
41,053 — — — (292)40,761 5,709 
41,053 — — — (292)40,761 5,709 
Rocade Holdings LLC(d)
Preferred LP Units (71,000 units) (SOFR + 6.00% PIK, 10.3% PIK)
73,113 12,098 (2,222)— 11 83,000 8,598 
Common LP Units (23.8 units)
844 — — — (601)243 — 
73,957 12,098 (2,222)— (590)83,243 8,598 
Sierra Senior Loan Strategy JV I LLC
89.01% Member Interest
39,172 — — — 2,281 41,453 2,225 
39,172 — — — 2,281 41,453 2,225 
Skyvault Holdings LLC(d)
First Lien Senior Secured Term Loan (12.0% PIK)
— 3,586 — — — 3,586 36 
LLC Units (1,195,449.6 units)
— 1,195 — — — 1,195 — 
— 4,781 — — — 4,781 36 
Thompson Rivers LLC
16% Member Interest
13,365 — (5,991)— (166)7,208 — 
13,365 — (5,991)— (166)7,208 — 
December 31, 2023
Value
Gross Additions
(a)
Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31, 2024
 Value
Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Waccamaw River LLC
20% Member Interest
$15,470 $— $(2,087)$— $(2,653)$10,730 $3,535 
15,470 — (2,087)— (2,653)10,730 3,535 
Total Affiliate Investments$402,423 $51,189 $(43,028)$(4,179)$(9,169)$397,236 $39,605 
(a)     Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
(b)    Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
(c) Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Affiliate category.
(d) The fair value of the investment was determined using significant unobservable inputs.
[49] The fair value of the investment was determined using significant unobservable inputs.
[50] The interest rate on these loans is subject to 3 Month BKBM, which as of September 30, 2025 was 2.93000%.
[51] The interest rate on these loans is subject to 3 Month BKBM, which as of December 31, 2024 was 4.27000%.
[52] The interest rate on these loans is subject to 3 Month SARON, which as of September 30, 2025 was -0.04090%
[53] The interest rate on these loans is subject to 6 Month SARON, which as of December 31, 2024 was 1.01720%.
[54] Portfolio company does not issue shares or units; member interest is based on commitments.
[55] Portfolio company does not issue shares or units; member interest is based on commitments.
[56] 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.
[57] Investment was purchased from MVC Capital, Inc. (“MVC”) in connection with the MVC Acquisition (as defined in “Note 2 - Agreements and Related Party Transactions”).
[58] As defined in the 1940 Act, the Company is deemed to be both an “affiliated person” and “control” the portfolio company because it owns more than 25% of the portfolio company’s outstanding voting securities or it has the power to exercise control over the management or policies of such portfolio company (including through a management agreement). Transactions for the nine months ended September 30, 2025 in which the portfolio company is deemed to be a “Control Investment” of the Company were as follows:
December 31, 2024
Value
Gross Additions
(a)
Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)September 30,
2025
 Value
Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Black Angus Steakhouses, LLC(d)
First Lien Senior Secured Term Loan (14.4% PIK)(e)
$2,744 $— $(610)$(7,481)$5,347 $— $(6)
First Lien Senior Secured Term Loan (10.0% PIK)(e)
— — — (9,628)9,628 — — 
LLC Units (44.6 units)
— — — — — — — 
2,744 — (610)(17,109)14,975 — (6)
MVC Automotive Group GmbH(d)
First Lien Senior Secured Term Loan (7.0% Cash)
— 2,310 (1,178)34 1,172 56 
Common Equity Interest (18,000 Shares)
13,741 — — — (4,028)9,713 — 
13,741 2,310 (1,178)(3,994)10,885 56 
MVC Private Equity Fund LP
General Partnership Interest
(1,831.4 units)
— — — (183)183 — — 
Limited Partnership Interest
(71,790.4 units)
11 — (116)(7,166)7,271 — — 
11 — (116)(7,349)7,454 — — 
Security Holdings B.V(d)
Bridge Loan (5.0% PIK)
6,655 168 — — — 6,823 254 
Revolver (6.0% PIK)
5,333 165 (3)730 6,227 283 
Senior Subordinated Term Loan (3.1% PIK)
11,191 352 — — — 11,543 268 
Senior Unsecured Term Loan (9.0% PIK)
2,293 234 — — 318 2,845 304 
Common Stock Series A (17,100 shares)
399 — — — 61 460 — 
Common Stock Series B (1,236 shares)
37,296 — — — 5,650 42,946 2,817 
63,167 919 (3)6,759 70,844 3,926 
Total Control Investments$79,663 $3,229 $(1,907)$(24,450)$25,194 $81,729 $3,976 
(a) Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
(b)     Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
(c)    Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Control category.
(d) The fair value of the investment was determined using significant unobservable inputs.
(e) Non-accrual investment.
[59] The interest rate on these loans is subject to 1 Month NIBOR, which as of September 30, 2025 was 4.04000%.
[60] The interest rate on these loans is subject to 1 Month NIBOR, which as of December 31, 2024 was 4.61000%.
[61] The interest rate on these loans is subject to 1 Month BBSY, which as of September 30, 2025 was 3.53630%.
[62] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2024 was 4.32250%.
[63] The interest rate on these loans is subject to 6 Month SARON, which as of September 30, 2025 was -0.04508%.
[64] The interest rate on these loans is subject to 3 Month STIBOR, which as of September 30, 2025 was 1.88600%.