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Unaudited Consolidated Schedule of Investments - Schedule Of Investments (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 1,800,594  
Fair value at ending balance $ 2,448,935 $ 1,800,594
Interest [1],[2],[3] 4.50%  
Interest 8.80% [1],[2],[3] 6.00% [4],[5],[6],[7]
Investment, interest rate, paid in kind [4],[5],[6],[7]   9.00%
Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 9.10%  
Sierra Senior Loan Strategy JV I, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 89.01%  
Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 16.00%  
Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 20.00%  
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Energy: Oil & Gas, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[9],[10] $ 0  
Interest [1],[2],[8],[9],[10] 5.00%  
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Energy: Oil & Gas, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[9],[10] $ 1,263  
Interest 5.00%  
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Energy: Oil & Gas, Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 0  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 7,546.76  
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 419  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (419)  
Fair value at ending balance $ 0 $ 0
Interest 5.00%  
Amount of Interest or Dividends Credited to Income $ 0  
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 1,498  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (235)  
Fair value at ending balance $ 1,263 0
Interest 5.00%  
Amount of Interest or Dividends Credited to Income $ (12)  
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 0  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 0
Amount of Interest or Dividends Credited to Income $ 0  
Investment owned, balance (in shares) 7,546.76  
Investment, Identifier [Axis]: 1WorldSync, Inc., IT Consulting & Other Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 16,434  
Fair value at ending balance [7],[14],[15]   $ 16,434
Interest [7],[14],[15]   6.25%
Interest [7],[14],[15]   7.30%
Investment, Identifier [Axis]: 1WorldSync, Inc., IT Consulting & Other Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 16,307  
Interest [1],[2],[16] 4.75%  
Interest [1],[2],[16] 8.80%  
Investment, Identifier [Axis]: A.T. Holdings II LTD, Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 12,500  
Interest [2] 14.30%  
Investment, Identifier [Axis]: ADB Safegate, Aerospace & Defense, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[14],[15] $ 5,106  
Fair value at ending balance $ 4,180 [1],[2],[10],[17] $ 5,106 [4],[14],[15]
Interest 9.25% [1],[2],[10],[17] 7.75% [4],[14],[15]
Interest 14.00% [1],[2],[10],[17] 8.80% [4],[14],[15]
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Transportation Services, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 689  
Fair value at ending balance $ 798 [2],[11] $ 689 [7]
Investment owned, balance (in shares) 348.68 [2],[11],[12],[13] 348.68 [7],[18],[19]
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Transportation Services, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 6,460  
Fair value at ending balance $ 6,215 [1],[2],[10] $ 6,460 [7],[14],[15]
Interest 7.50% [1],[2],[10] 7.75% [7],[14],[15]
Interest 12.20% [1],[2],[10] 8.50% [7],[14],[15]
Investment, Identifier [Axis]: AMMC CLO 22, Limited Series 2018-22A, Multi-Sector Holdings, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[17] $ 3,190  
Investment, Identifier [Axis]: AMMC CLO 23, Ltd. Series 2020-23A, Multi-Sector Holdings, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[17] 1,423  
Investment, Identifier [Axis]: AP Aristotle Holdings, LLC, Oil Field Services, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] 1,854  
Fair value at ending balance [7]   $ 1,854
Interest [7]   19.80%
Investment, Identifier [Axis]: APC1 Holding, Diversified Manufacturing, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 2,044  
Interest [1],[2],[17],[20] 6.00%  
Interest [1],[2],[17],[20] 8.20%  
Investment, Identifier [Axis]: APOG Bidco Pty Ltd, Healthcare, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[21] $ 2,073  
Interest [1],[2],[17],[21] 7.25%  
Interest [1],[2],[17],[21] 10.30%  
Investment, Identifier [Axis]: AQA Acquisition Holding, Inc., High Tech Industries, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 20,000  
Fair value at ending balance $ 19,140 [1],[2],[10] $ 20,000 [7],[14],[15]
Interest 7.50% [1],[2],[10] 7.50% [7],[14],[15]
Interest 12.20% [1],[2],[10] 8.00% [7],[14],[15]
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance $ 620  
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Class A Units (25,718.20 units)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Investment owned, balance (in shares) [12],[13] 25,718.2  
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance $ 20,920  
Interest 5.00%  
Interest 9.30%  
Investment, Identifier [Axis]: ASPEQ Heating Group LLC, Building Products, Air & Heating, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 8,464  
Fair value at ending balance $ 8,367 [1],[2],[10] $ 8,464 [7],[14],[22]
Interest 4.25% [1],[2],[10] 5.25% [7],[14],[22]
Interest 9.00% [1],[2],[10] 6.30% [7],[14],[22]
Investment, Identifier [Axis]: ATL II MRO Holdings Inc, Transportation, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[23] $ 8,125  
Interest 6.00%  
Interest 10.40%  
Investment, Identifier [Axis]: ATL II MRO Holdings Inc, Transportation, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[23] $ (42)  
Interest 6.00%  
Interest 10.40%  
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [14],[15] $ 4,458  
Fair value at ending balance $ 4,416 [1],[3] $ 4,458 [14],[15]
Interest 3.25% [1],[3] 3.25% [14],[15]
Interest 7.70% [1],[3] 4.30% [14],[15]
Investment, interest rate, paid in kind 0.30% [1],[3] 0.25% [14],[15]
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [14],[15] $ 693  
Fair value at ending balance $ 685 [1],[3] $ 693 [14],[15]
Interest 4.50% [1],[3] 4.50% [14],[15]
Interest 8.70% [1],[3] 5.50% [14],[15]
Investment, interest rate, paid in kind 1.00% [1],[3] 1.00% [14],[15]
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 6,404  
Fair value at ending balance $ 5,919 $ 6,404
Interest 5.00% 5.00%
Investment, interest rate, paid in kind 10.00% 10.00%
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class A Convertible Preferred Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 5,403  
Investment owned, balance (in shares) [2],[11],[12],[13] 5,000  
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class A Convertible Preferred Equity1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 1,667  
Investment owned, balance (in shares) [2],[11],[12],[13] 1,667  
Investment, Identifier [Axis]: Accelerate Learning, Inc., Education Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 7,429  
Fair value at ending balance $ 7,480 [1],[2],[10] $ 7,429 [7],[14],[15]
Interest 4.50% [1],[2],[10] 5.00%
Interest 8.90% [1],[2],[10] 6.00% [7],[14],[15]
Investment, Identifier [Axis]: Acclime Holdings HK Limited, Business Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 1,147  
Fair value at ending balance [4],[7],[14],[15]   $ 1,147
Interest [4],[7],[14],[15]   6.50%
Interest [4],[7],[14],[15]   7.00%
Investment, Identifier [Axis]: Acclime Holdings HK Limited, Business services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[24] $ 2,436  
Interest [1],[2],[17],[24] 6.50%  
Interest [1],[2],[17],[24] 9.60%  
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 436  
Investment owned, balance (in shares) [2],[11],[12],[13] 437,623.3  
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[25] $ 24,016  
Fair value at ending balance $ 12,069 [1],[2],[10] $ 24,016 [7],[14],[25]
Interest 5.75% [1],[2],[10] 4.50% [7],[14],[25]
Interest 10.80% [1],[2],[10] 5.50% [7],[14],[25]
Investment, interest rate, paid in kind [7],[14],[25]   1.50%
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 1,116  
Interest [1],[2],[10] 5.75%  
Interest [1],[2],[10] 10.80%  
Investment, Identifier [Axis]: Acogroup, Business Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 7,276  
Interest [1],[2],[17],[26] 6.25%  
Interest [1],[2],[17],[26] 6.80%  
Investment, Identifier [Axis]: Advantage Insurance, Inc., Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0 $ 5,947
Gross Additions   0
Gross Reductions   (5,870)
Amount of Realized Gain (Loss)   (77)
Amount of Unrealized Gain (Loss)   0
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income   $ 72
Investment owned, balance (in shares)   587,001
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A1 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] 280  
Fair value at ending balance $ 671 [2],[11] $ 280 [7]
Investment owned, balance (in shares) 8,717.76 [2],[11],[12],[13] 8,717.76 [7],[18],[19]
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A2 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 72  
Fair value at ending balance $ 173 [2],[11] $ 72 [7]
Investment owned, balance (in shares) 2,248.46 [2],[11],[12],[13] 2,248.46 [7],[18],[19]
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class B1 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 9  
Fair value at ending balance $ 0 [2],[11] $ 9 [7]
Investment owned, balance (in shares) 8,717.76 [2],[11],[12],[13] 8,717.76 [7],[18],[19]
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class B2 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 2  
Fair value at ending balance $ 0 [2],[11] $ 2 [7]
Investment owned, balance (in shares) 2,248.46 [2],[11],[12],[13] 2,248.46 [7],[18],[19]
Investment, Identifier [Axis]: Aftermath Bidco Corporation, Professional Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 9,303  
Fair value at ending balance [7],[14],[15]   $ 9,303
Interest [7],[14],[15]   5.00%
Interest [7],[14],[15]   6.00%
Investment, Identifier [Axis]: Air Canada 2020-2 Class B Pass Through Trust, Airlines, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 6,822  
Fair value at ending balance $ 4,816 $ 6,822
Interest 9.00% 9.00%
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 11,280  
Fair value at ending balance $ 12,722 [1],[2],[10] $ 11,280 [7],[14],[15]
Interest 5.50% [1],[2],[10] 5.50% [7],[14],[15]
Interest 10.20% [1],[2],[10] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: Alpine SG, LLC, High Tech Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[27] $ 22,677  
Interest [1],[2],[8],[27] 6.00%  
Interest [1],[2],[8],[27] 10.40%  
Investment, Identifier [Axis]: Alpine US Bidco LLC, Agricultural Products, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 17,975  
Fair value at ending balance $ 16,704 [1],[3] $ 17,975 [7],[14],[15]
Interest 9.00% [1],[3] 9.00% [7],[14],[15]
Interest 13.30% [1],[3] 9.80% [7],[14],[15]
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Class B Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 1,121  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 93,165,208  
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Subordinated Loan Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[10],[17] $ 4,303  
Interest 2.00%  
Interest [2],[10],[17] 6.80%  
Investment, interest rate, paid in kind [2],[10],[17] 9.00%  
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Warrant    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 426  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 380,385  
Investment, Identifier [Axis]: Amtech LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 3,955  
Fair value at ending balance $ 2,222 [1],[2],[3] $ 3,955 [7],[14],[22]
Interest 5.50% [1],[2],[3] 5.50% [7],[14],[22]
Interest 9.60% [1],[2],[3] 6.30% [7],[14],[22]
Investment, Identifier [Axis]: Amtech LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (14)  
Fair value at ending balance $ 128 [1],[2],[3] $ (14) [7],[14],[15]
Interest 5.50% [1],[2],[3] 5.50% [7],[14],[15]
Interest 9.60% [1],[2],[3] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: Anagram Holdings, LLC, Chemicals, Plastics, & Rubber, First Lien Senior Secured Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] $ 16,051  
Fair value at ending balance $ 14,368 $ 16,051 [4]
Interest 10.00% 10.00% [4]
Investment, interest rate, paid in kind 5.00% 5.00% [4]
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 2,330  
Interest [1],[2],[17],[20] 7.70%  
Interest [1],[2],[17],[20] 6.00%  
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 723  
Interest [1],[2],[17],[20] 6.00%  
Interest [1],[2],[17],[20] 7.70%  
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 5,623  
Interest [1],[2],[17],[20] 6.00%  
Interest [1],[2],[17],[20] 7.70%  
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10],[17] $ 997  
Interest [1],[2],[10],[17] 6.00%  
Interest [1],[2],[10],[17] 10.80%  
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ (8)  
Interest [1],[2],[17],[20] 6.00%  
Interest [1],[2],[17],[20] 7.70%  
Investment, Identifier [Axis]: AnalytiChem Holding Gmbh, Chemicals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 2,576  
Fair value at ending balance [4],[7],[14],[28]   $ 2,576
Interest [4],[7],[14],[28]   6.25%
Interest [4],[7],[14],[28]   6.30%
Investment, Identifier [Axis]: Anju Software, Inc., Application Software, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] 13,284  
Fair value at ending balance $ 11,006 [1],[2],[3] $ 13,284 [7],[14],[22]
Interest 7.25% [1],[2],[3] 6.25% [7],[14],[22]
Interest 11.60% [1],[2],[3] 6.30% [7],[14],[22]
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[29] $ 1,970  
Fair value at ending balance $ 1,753 [1],[2],[17],[30] $ 1,970 [4],[7],[14],[29]
Interest 6.25% [1],[2],[17],[30] 6.25% [4],[7],[14],[29]
Interest 9.70% [1],[2],[17],[30] 6.80% [4],[7],[14],[29]
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, Subordinated Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7] $ 278  
Fair value at ending balance $ 266 [2],[17] $ 278 [4],[7]
Investment, interest rate, paid in kind 8.00% [2],[17] 8.00% [4],[7]
Investment, Identifier [Axis]: Apidos CLO XXIV, Series 2016-24A, Multi-Sector Holdings, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[17] $ 6,635  
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, & Rubber, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7] 11  
Fair value at ending balance [4],[7]   $ 11
Investment owned, balance (in shares) [4],[7],[18],[19]   48
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, & Rubber, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] 4,552  
Fair value at ending balance [4],[7],[14],[28]   $ 4,552
Interest [4],[7],[14],[28]   6.50%
Interest [4],[7],[14],[28]   6.50%
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, & Rubber, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7] 111  
Fair value at ending balance [4],[7]   $ 111
Investment owned, balance (in shares) [4],[7],[18],[19]   13
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 6  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 48  
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[31] $ 5,085  
Interest [1],[2],[17],[31] 7.00%  
Interest [1],[2],[17],[31] 8.90%  
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 110  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 13  
Investment, Identifier [Axis]: Apus Bidco Limited, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] $ 3,823  
Fair value at ending balance $ 3,344 [1],[2],[17],[33] $ 3,823 [4],[7],[14],[32]
Interest 5.50% [1],[2],[17],[33] 5.50% [4],[7],[14],[32]
Interest 7.20% [1],[2],[17],[33] 5.50% [4],[7],[14],[32]
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] $ 5,766  
Fair value at ending balance $ 5,263 [1],[2],[17],[33] $ 5,766 [4],[7],[14],[32]
Interest 6.00% [1],[2],[17],[33] 6.00% [4],[7],[14],[32]
Interest 8.90% [1],[2],[17],[33] 6.10% [4],[7],[14],[32]
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[33] $ 198  
Interest [1],[2],[17],[33] 6.00%  
Interest [1],[2],[17],[33] 8.90%  
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] $ (5)  
Fair value at ending balance [4],[7],[14],[32]   $ (5)
Interest [4],[7],[14],[32]   6.00%
Interest [4],[7],[14],[32]   6.10%
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] 1,465  
Fair value at ending balance $ 1,475 [1],[2],[17],[33] $ 1,465 [4],[7],[14],[32]
Interest [1],[2],[17],[33] 10.50%  
Investment, interest rate, paid in kind [4],[7],[14],[32]   10.50%
Investment, Identifier [Axis]: Arc Education, Consumer Cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 2,969  
Interest [1],[2],[17],[20] 5.75%  
Interest [1],[2],[17],[20] 8.00%  
Investment, Identifier [Axis]: Arch Global Precision LLC, Industrial Machinery, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 9,248  
Fair value at ending balance $ 9,094 [1],[2],[10] $ 9,248 [7],[14],[15]
Interest 4.75% [1],[2],[10] 4.75% [7],[14],[15]
Interest 9.20% [1],[2],[10] 4.80% [7],[14],[15]
Investment, Identifier [Axis]: Archimede, Consumer Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 8,255  
Fair value at ending balance $ 6,164 [1],[2],[17],[20] $ 8,255 [4],[7],[14],[28]
Interest 5.75% [1],[2],[17],[20] 6.00% [4],[7],[14],[28]
Interest 7.50% [1],[2],[17],[20] 6.00% [4],[7],[14],[28]
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 0  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 464  
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Equity Loan Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 50  
Investment, interest rate, paid in kind [2],[17] 10.00%  
Investment owned, balance (in shares) [2],[12],[13],[17] 41,560  
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[34] $ 2,682  
Fair value at ending balance $ 126 [1],[2],[16],[17] $ 2,682 [4],[7],[14],[34]
Interest 5.75% [1],[2],[16],[17] 5.50% [4],[7],[14],[34]
Interest 10.30% [1],[2],[16],[17] 5.80% [4],[7],[14],[34]
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 672  
Fair value at ending balance $ 1,536 [1],[2],[17],[30] $ 672 [4],[7],[14],[15]
Interest 5.75% [1],[2],[17],[30] 5.50% [4],[7],[14],[15]
Interest 9.20% [1],[2],[17],[30] 5.80% [4],[7],[14],[15]
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 1,547  
Interest [1],[2],[17],[20] 5.75%  
Interest [1],[2],[17],[20] 8.00%  
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 50  
Investment, interest rate, paid in kind [2],[17] 10.00%  
Investment owned, balance (in shares) [2],[12],[13],[17] 41,560  
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 487  
Investment, interest rate, paid in kind [2],[17] 10.50%  
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC ), Air Freight & Logistics, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 3,939  
Fair value at ending balance [7],[14],[15]   $ 3,939
Interest [7],[14],[15]   4.75%
Interest [7],[14],[15]   5.80%
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC ), Air Freight & Logistics, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 3,896  
Interest [1],[2],[10] 5.75%  
Interest [1],[2],[10] 10.20%  
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC ), Air Freight & Logistics, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[23] $ 4,932  
Interest [1],[2],[23] 5.50%  
Interest [1],[2],[23] 9.70%  
Investment, Identifier [Axis]: Astra Bidco Limited, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[34] $ 5,535  
Fair value at ending balance $ 1,886 [1],[2],[17],[30] $ 5,535 [4],[7],[14],[34]
Interest 5.00% [1],[2],[17],[30] 5.75% [4],[7],[14],[34]
Interest 9.40% [1],[2],[17],[30] 5.80% [4],[7],[14],[34]
Investment, Identifier [Axis]: Auxi International, Commercial Finance, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[35] $ 1,439  
Fair value at ending balance $ 1,305 [1],[2],[17],[26] $ 1,439 [4],[7],[14],[35]
Interest 6.25% [1],[2],[17],[26] 6.25% [4],[7],[14],[35]
Interest 8.10% [1],[2],[17],[26] 6.30% [4],[7],[14],[35]
Investment, Identifier [Axis]: Auxi International, Commercial Finance, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] $ 820  
Fair value at ending balance $ 704 [1],[2],[17],[30] $ 820 [4],[7],[14],[32]
Interest 7.25% [1],[2],[17],[30] 6.25% [4],[7],[14],[32]
Interest 10.70% [1],[2],[17],[30] 6.30% [4],[7],[14],[32]
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[36] $ 6,158  
Fair value at ending balance $ 2,298 [1],[2],[17],[37] $ 6,158 [4],[7],[14],[36]
Interest 4.50% [1],[2],[17],[37] 5.50% [4],[7],[14],[36]
Interest 7.70% [1],[2],[17],[37] 6.00% [4],[7],[14],[36]
Investment, Identifier [Axis]: Aviation Technical Services, Inc., Aerospace & Defense, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3],[8] $ 27,794  
Interest [1],[2],[3],[8] 2.00%  
Interest [1],[2],[3],[8] 6.40%  
Investment, interest rate, paid in kind [1],[2],[3],[8] 6.50%  
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 192  
Fair value at ending balance $ 183 [2],[11] $ 192 [7]
Investment owned, balance (in shares) 192,307.7 [2],[11],[13] 192,307.7
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[15] $ 4,494  
Fair value at ending balance $ 4,489 [1],[2],[10] $ 4,494 [7],[15]
Interest 5.25% [1],[2],[10] 5.25% [7],[15]
Interest 10.00% [1],[2],[10] 6.30% [7],[15]
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[15] $ (10)  
Fair value at ending balance $ (6) [1],[2],[10] $ (10) [7],[15]
Interest 5.25% [1],[2],[10] 5.25% [7],[15]
Interest 10.00% [1],[2],[10] 6.30% [7],[15]
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 1,234  
Fair value at ending balance $ 1,403 [2] $ 1,234 [7]
Investment, interest rate, paid in kind 12.00% [2] 12.00% [7]
Investment, Identifier [Axis]: BDP International, Inc. (f/k/a BDP Buyer, LLC), Air Freight & Logistics, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 14,626  
Fair value at ending balance [7],[14],[22]   $ 14,626
Interest [7],[14],[22]   4.75%
Interest [7],[14],[22]   5.80%
Investment, Identifier [Axis]: BVI Medical, Inc., Healthcare, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[20] $ 9,495  
Interest [1],[2],[20] 9.50%  
Interest [1],[2],[20] 11.60%  
Investment, Identifier [Axis]: Bariacum S.A, Consumer Products, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 5,944  
Interest [1],[2],[17],[26] 5.50%  
Interest [1],[2],[17],[26] 6.70%  
Investment, Identifier [Axis]: Bariacum S.A., Consumer Products, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 6,244  
Fair value at ending balance [4],[7],[14],[28]   $ 6,244
Interest [4],[7],[14],[28]   5.50%
Interest [4],[7],[14],[28]   5.50%
Investment, Identifier [Axis]: Benify (Bennevis AB), High Tech Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[38] 1,286  
Fair value at ending balance $ 1,060 [1],[2],[17],[39] $ 1,286 [4],[7],[14],[38]
Interest 5.25% [1],[2],[17],[39] 5.25% [4],[7],[14],[38]
Interest 7.90% [1],[2],[17],[39] 5.30% [4],[7],[14],[38]
Investment, Identifier [Axis]: Beyond Risk Management, Inc., Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 2,327  
Fair value at ending balance $ 2,493 [1],[2],[3] $ 2,327 [7],[14],[15]
Interest 4.50% [1],[2],[3] 4.50% [7],[14],[15]
Interest 8.90% [1],[2],[3] 5.30% [7],[14],[15]
Investment, Identifier [Axis]: Bidwax, Non-durable Consumer Goods, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 7,741  
Fair value at ending balance $ 7,254 [1],[2],[17],[26] $ 7,741 [4],[7],[14],[28]
Interest 6.50% [1],[2],[17],[26] 6.50% [4],[7],[14],[28]
Interest 8.60% [1],[2],[17],[26] 6.50% [4],[7],[14],[28]
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[40] $ 878  
Fair value at ending balance [4],[7],[14],[40]   $ 878
Interest [4],[7],[14],[40]   5.25%
Interest [4],[7],[14],[40]   5.40%
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16],[17] $ 2,484  
Interest [1],[2],[16],[17] 5.50%  
Interest [1],[2],[16],[17] 9.80%  
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[30] $ 792  
Interest [1],[2],[17],[30] 5.50%  
Interest [1],[2],[17],[30] 9.00%  
Investment, Identifier [Axis]: Biolam Group, Consumer Non-cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[20] $ 2,939  
Interest 6.25%  
Interest 8.20%  
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 5,647  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 5,647 $ 0
Amount of Interest or Dividends Credited to Income $ 544  
Interest 13.50%  
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 9,628  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (481)  
Fair value at ending balance 9,147 0
Amount of Interest or Dividends Credited to Income $ 0  
Investment, interest rate, paid in kind 10.00%  
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3],[8] $ 5,647  
Interest [1],[2],[3],[8] 9.10%  
Interest [1],[2],[3],[8] 13.50%  
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[9] $ 9,147  
Investment, interest rate, paid in kind [2],[8],[9] 10.00%  
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 0  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 44.6  
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 0  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 0
Amount of Interest or Dividends Credited to Income $ 0  
Investment owned, balance (in shares) 44.6  
Investment, Identifier [Axis]: Black Diamond Equipment Rentals LLC, Equipment Rental, Second Lien Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7] $ 10,000  
Fair value at ending balance [6],[7]   $ 10,000
Interest [6],[7]   12.50%
Investment, Identifier [Axis]: Black Diamond Equipment Rentals LLC, Equipment Rental, Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7] 864  
Fair value at ending balance [6],[7]   $ 864
Investment owned, balance (in shares) [6],[7],[18],[19]   4.17
Investment, Identifier [Axis]: Bounteous, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] 4,756  
Fair value at ending balance $ 1,735 [1],[2],[10] $ 4,756 [7],[14],[15]
Interest 5.25% [1],[2],[10] 5.00% [7],[14],[15]
Interest 10.00% [1],[2],[10] 6.00% [7],[14],[15]
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Environmental Industries, Municipal Revenue Bond    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance $ 28,300  
Interest 11.50%  
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Environmental Industries, Preferred Stock- Series C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 14,731  
Investment, interest rate, paid in kind [2] 7.00%  
Investment owned, balance (in shares) [2],[12],[13] 14,618  
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 12,683  
Fair value at ending balance $ 4,724 [1],[2],[10] $ 12,683 [7],[14],[15]
Interest 5.75% [1],[2],[10] 5.75% [7],[14],[15]
Interest 10.50% [1],[2],[10] 6.80% [7],[14],[15]
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, LLC units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 1,135  
Fair value at ending balance $ 1,152 [2],[11] $ 1,135 [7]
Investment owned, balance (in shares) 1,107,492.71 [2],[11],[12],[13] 1,107,492.71 [7],[18],[19]
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (13)  
Fair value at ending balance $ (12) [1],[2],[10] $ (13) [7],[14],[15]
Interest 5.75% [1],[2],[10] 5.75% [7],[14],[15]
Interest 10.50% [1],[2],[10] 6.80% [7],[14],[15]
Investment, Identifier [Axis]: Brightline Trains Florida LLC, Transportation, Senior Secured Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 5,005  
Fair value at ending balance $ 4,350 [2] $ 5,005 [7]
Interest 8.00% [2] 8.00% [7]
Investment, Identifier [Axis]: Brightpay Limited, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 1,862  
Fair value at ending balance $ 2,156 [1],[2],[17],[20] $ 1,862 [4],[7],[14],[28]
Interest 5.00% [1],[2],[17],[20] 5.25% [4],[7],[14],[28]
Interest 6.50% [1],[2],[17],[20] 5.30% [4],[7],[14],[28]
Investment, Identifier [Axis]: British Airways 2020-1 Class B Pass Through Trust, Airlines, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 916  
Fair value at ending balance $ 692 $ 916
Interest 8.40% 8.40%
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, Commercial Services & Supplies, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] $ 15,406  
Fair value at ending balance $ 13,454 [1],[2],[17],[30] $ 15,406 [4],[7],[14],[32]
Interest 7.00% [1],[2],[17],[30] 6.75%
Interest 9.30% [1],[2],[17],[30] 7.00%
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, Commercial Services & Supplies, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] $ (5)  
Fair value at ending balance [4],[7],[14],[32]   $ (5)
Interest   6.75%
Interest   7.00%
Investment, Identifier [Axis]: Brook & Whittle Holding Corp., Containers, Packaging & Glass, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[8],[16] $ 2,478  
Interest [1],[8],[16] 4.00%  
Interest [1],[8],[16] 8.50%  
Investment, Identifier [Axis]: Brown Machine Group Holdings, LLC, Industrial Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 6,634  
Fair value at ending balance $ 6,281 [1],[2],[10] $ 6,634 [7],[14],[22]
Interest 5.25% [1],[2],[10] 5.25%
Interest 10.00% [1],[2],[10] 6.30%
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Auto Parts & Equipment, LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 446  
Investment owned, balance (in shares) [2],[11],[12],[13] 455  
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Auto Parts & Equipment, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 4,390  
Interest [1],[2],[27] 9.00%  
Interest [1],[2],[27] 13.30%  
Investment, Identifier [Axis]: CATAWBA RIVER LIMITED, Finance Companies, Structured - Junior Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 5,239  
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] 8,876  
Fair value at ending balance [7],[14],[15]   $ 8,876
Interest   6.25%
Interest   7.30%
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 1,341  
Interest [1],[2],[10] 6.25%  
Interest [1],[2],[10] 10.20%  
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 4,879  
Interest [1],[2],[10] 6.25%  
Interest [1],[2],[10] 11.00%  
Investment, Identifier [Axis]: CAi Software, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ (19)  
Fair value at ending balance $ (24) [1],[2],[10] $ (19)
Interest 6.25% [1],[2],[10] 6.25%
Interest 11.00% [1],[2],[10] 7.30%
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 10,377  
Interest [1],[2],[3] 4.50%  
Interest [1],[2],[3] 8.80%  
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 1,344  
Interest [1],[2],[16] 4.75%  
Interest [1],[2],[16] 9.30%  
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 1,027  
Investment owned, balance (in shares) [2],[11],[12],[13] 551  
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ (49)  
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., Internet & Direct Marketing, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] 19,106  
Fair value at ending balance [7],[14],[15]   $ 19,106
Interest   4.75%
Interest   5.80%
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., Internet & Direct Marketing, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 18,060  
Interest [1],[2],[16] 5.00%  
Interest [1],[2],[16] 9.00%  
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 3,999  
Fair value at ending balance $ 3,928 [1],[2],[10] $ 3,999 [7],[14],[15]
Interest 5.00% [1],[2],[10] 5.00%
Interest 9.20% [1],[2],[10] 6.00%
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 227  
Fair value at ending balance $ 165 [2] $ 227 [7]
Investment owned, balance (in shares) 8,782 [2],[12],[13] 8,782
Investment, Identifier [Axis]: CSL DualCom, Tele-communications, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[40] $ 1,301  
Fair value at ending balance $ 1,921 [1],[2],[17],[41] $ 1,301 [4],[7],[14],[40]
Interest 5.25% [1],[2],[17],[41] 5.50%
Interest 8.70% [1],[2],[17],[41] 5.50%
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc., Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[3],[8] $ 4,505  
Interest [1],[3],[8] 4.25%  
Interest [1],[3],[8] 8.60%  
Investment, Identifier [Axis]: CVL 3, Capital Equipment, 6-Month Bridge Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 788  
Fair value at ending balance [4],[7],[14],[28]   $ 788
Interest   5.50%
Interest   5.50%
Investment, Identifier [Axis]: CVL 3, Capital Equipment, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] 5,766  
Fair value at ending balance $ 891 [1],[2],[17],[20] $ 5,766 [4],[7],[14],[28]
Interest 5.50% [1],[2],[17],[20] 5.50% [28]
Interest 7.60% [1],[2],[17],[20] 5.50% [28]
Investment, Identifier [Axis]: CVL 3, Capital Equipment, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[42] $ 3,298  
Fair value at ending balance $ 1,122 [1],[2],[16],[17] $ 3,298 [4],[7],[14],[42]
Interest 5.50% [1],[2],[16],[17] 5.50%
Interest [1],[2],[16],[17] 10.20%  
Investment, Identifier [Axis]: CW Group Holdings, LLC, High Tech Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 2,774  
Fair value at ending balance [7],[14],[15]   $ 2,774
Interest   6.00%
Interest   7.00%
Investment, Identifier [Axis]: CW Group Holdings, LLC, High Tech Industries, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] 112  
Fair value at ending balance $ 204 [2],[11] $ 112 [7]
Investment owned, balance (in shares) 161,290.32 [2],[11],[12],[13] 161,290.32
Investment, Identifier [Axis]: CW Group Holdings, LLC, High Tech Industries,First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 2,766  
Interest [1],[2],[3] 6.00%  
Interest [1],[2],[3] 10.40%  
Investment, Identifier [Axis]: Cadent, LLC (f/k/a Cross MediaWorks), Media & Entertainment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 6,913  
Fair value at ending balance [7],[14],[22]   $ 6,913
Interest   5.00%
Interest   6.00%
Investment, Identifier [Axis]: Cadent, LLC (f/k/a Cross MediaWorks), Media & Entertainment, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 6,580  
Interest [1],[2],[10] 6.50%  
Interest [1],[2],[10] 11.20%  
Investment, Identifier [Axis]: Cadent, LLC (f/k/a Cross MediaWorks), Media & Entertainment, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 11,080  
Interest [1],[2],[10] 6.50%  
Interest [1],[2],[10] 11.20%  
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class A Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 292  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 500,000  
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class C - Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 0  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 74,712.64  
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[43] $ 1,625  
Fair value at ending balance $ 1,468 [1],[2],[17],[44] $ 1,625 [4],[7],[14],[43]
Interest 7.00% [1],[2],[17],[44] 6.50%
Interest 11.90% [1],[2],[17],[44] 7.50%
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16],[17] $ 4,269  
Interest [1],[2],[16],[17] 7.64%  
Interest [1],[2],[16],[17] 12.50%  
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 627  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 681,818  
Investment, Identifier [Axis]: Carlson Travel, Inc, Business Travel Management, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 3,084  
Fair value at ending balance $ 1,339 [11] $ 3,084
Interest 8.50%  
Investment owned, balance (in shares) 94,155 [11],[12],[13] 94,155
Investment, Identifier [Axis]: Carlson Travel, Inc, Business Travel Management, First Lien Senior Secured Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 6,161  
Fair value at ending balance 5,113 $ 6,161
Interest   8.50%
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Diversified Financial Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] 807  
Fair value at ending balance [4],[7],[14],[28]   $ 807
Interest   5.25%
Interest   5.30%
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Diversified Financial Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 820  
Interest [1],[2],[17],[20] 5.25%  
Interest [1],[2],[17],[20] 7.10%  
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Diversified Financial Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 1,158  
Interest [1],[2],[17],[20] 5.75%  
Interest [1],[2],[17],[20] 7.60%  
Investment, Identifier [Axis]: Ceres Pharma NV, Pharma-ceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 3,139  
Interest [1],[2],[17],[26] 5.50%  
Interest [1],[2],[17],[26] 7.10%  
Investment, Identifier [Axis]: Ceres Pharma NV, Pharmaceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[35] $ 4,355  
Fair value at ending balance [4],[7],[14],[35]   $ 4,355
Interest   5.50%
Interest   5.50%
Investment, Identifier [Axis]: Charming Charlie LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 0  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 $ 0
Amount of Interest or Dividends Credited to Income $ 0  
Investment owned, balance (in shares) 34,923,249  
Investment, Identifier [Axis]: Charming Charlie LLC, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 0  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 0
Amount of Interest or Dividends Credited to Income $ 0  
Interest 20.00%  
Investment, Identifier [Axis]: Charming Charlie LLC, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 0  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 0
Amount of Interest or Dividends Credited to Income $ 0  
Interest 10.40%  
Investment, Identifier [Axis]: Charming Charlie LLC, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 0  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance $ 0 0
Interest 12.00%  
Amount of Interest or Dividends Credited to Income $ 35  
Interest 15.70%  
Investment, Identifier [Axis]: Charming Charlie LLC, First Lien Senior Secured Term Loan 4    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 0  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance $ 0 0
Interest 5.00%  
Amount of Interest or Dividends Credited to Income $ 0  
Interest 8.70%  
Investment, Identifier [Axis]: Cineworld Group PLC, Leisure Products, Super Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] $ 2,128  
Fair value at ending balance [4]   $ 2,128
Interest   7.00%
Investment, interest rate, paid in kind   8.30%
Investment, Identifier [Axis]: Cineworld Group PLC, Leisure Products, Super Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[14],[25] 1,054  
Fair value at ending balance [4],[14],[25]   $ 1,054
Interest   8.25%
Interest   9.30%
Investment, Identifier [Axis]: Cineworld Group PLC, Leisure Products, Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] 244  
Fair value at ending balance $ 0 [2],[11],[17] $ 244 [4]
Investment owned, balance (in shares) 553,375 [2],[11],[12],[13],[17] 553,375
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Auto Collision Repair Centers, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 12,448  
Fair value at ending balance [7],[14],[15]   $ 12,448
Interest   5.00%
Interest   6.00%
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Auto Collision Repair Centers, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 6,189  
Interest [1],[2],[3] 5.75%  
Interest [1],[2],[3] 10.10%  
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Auto Collision Repair Centers,First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 523  
Interest [1],[2],[3] 5.75%  
Interest [1],[2],[3] 10.10%  
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Other Financial, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 1,643  
Fair value at ending balance $ 10,729 [2],[11] $ 1,643 [7]
Investment owned, balance (in shares) 2,037,735 [2],[11],[12],[13] 547,591
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Other Financial, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 15,966  
Fair value at ending balance [7]   $ 15,966
Investment, interest rate, paid in kind   10.00%
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Other Financial, Subordinated Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 6,036  
Investment, interest rate, paid in kind [2] 10.00%  
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Other Financial, Subordinated Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 15,528  
Interest [2] 8.00%  
Investment, Identifier [Axis]: Cobham Slip Rings SAS, Diversified Manufacturing, Diversified Manufacturing    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10],[17] $ 1,270  
Interest [1],[2],[10],[17] 6.25%  
Interest [1],[2],[10],[17] 11.00%  
Investment, Identifier [Axis]: Cobham Slip Rings SAS, Diversified Manufacturing, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 4,196  
Fair value at ending balance [4],[7],[14],[15]   $ 4,196
Interest   6.25%
Interest   6.40%
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, , First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] 13,658  
Fair value at ending balance [7],[14],[22]   $ 13,658
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] 101  
Fair value at ending balance [7]   $ 101
Investment owned, balance (in shares)   90,384
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, Class B Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 196  
Investment owned, balance (in shares) [2],[11],[12],[13] 33,324.69  
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, Class B Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 186  
Fair value at ending balance [7]   $ 186
Investment owned, balance (in shares)   33,324.69
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Interest [22]   8.25%
Interest [22]   9.30%
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 13,302  
Interest [1],[2],[27] 7.75%  
Interest [1],[2],[27] 12.10%  
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 159  
Investment owned, balance (in shares) [2],[11],[12],[13] 46,085.6  
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 369  
Interest [2] 11.00%  
Investment, interest rate, paid in kind [2] 1.00%  
Investment, Identifier [Axis]: Comply365, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[23] $ 13,446  
Interest [1],[2],[23] 5.75%  
Interest [1],[2],[23] 10.60%  
Investment, Identifier [Axis]: Comply365, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[23] $ 148  
Interest [1],[2],[23] 5.75%  
Interest [1],[2],[23] 10.60%  
Investment, Identifier [Axis]: Contabo Finco S.À R.L, Internet Software & Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[34] $ 5,830  
Fair value at ending balance $ 4,845 [1],[2],[17],[20] $ 5,830 [4],[7],[14],[34]
Interest 6.00% [1],[2],[17],[20] 5.25%
Interest 7.60% [1],[2],[17],[20] 5.30%
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [11] $ 7  
Investment owned, balance (in shares) [11],[12],[13] 91,504  
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[9] $ 11,118  
Interest [2],[9] 13.00%  
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7] $ 587  
Fair value at ending balance $ 196 [2],[11],[17] $ 587 [4],[7]
Investment owned, balance (in shares) 440 [2],[11],[12],[13],[17] 440
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class B Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7] $ 252  
Fair value at ending balance $ 497 [2],[11],[17] $ 252 [4],[7]
Investment owned, balance (in shares) 191 [2],[11],[12],[13],[17] 191
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 3,938  
Fair value at ending balance $ 4,233 [1],[2],[17],[26] $ 3,938 [4],[7],[14],[28]
Interest 3.25% [1],[2],[17],[26] 6.50%
Interest 3.30% [1],[2],[17],[26] 6.50%
Investment, interest rate, paid in kind [1],[2],[17],[26] 3.50%  
Investment, Identifier [Axis]: Crash Champions, Automotive, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 13,968  
Fair value at ending balance [7],[14],[15]   $ 13,968
Interest   5.00%
Interest   6.00%
Investment, Identifier [Axis]: Custom Alloy Corporation, Manufacturer of Pipe Fittings & Forgings, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[45] 2,596  
Fair value at ending balance $ 189 [2],[9],[46] $ 2,596 [6],[7],[45]
Investment, interest rate, paid in kind 15.00% [2],[9],[46] 15.00%
Investment, Identifier [Axis]: Custom Alloy Corporation, Manufacturer of Pipe Fittings & Forgings, Second Lien Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[45] $ 27,450  
Fair value at ending balance $ 1,997 [2],[9],[46] $ 27,450 [6],[7],[45]
Investment, interest rate, paid in kind 15.00% [2],[9],[46] 15.00%
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 5,491  
Interest [1],[2],[27] 5.50%  
Interest [1],[2],[27] 9.80%  
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 0  
Interest [1],[2],[27] 5.50%  
Interest [1],[2],[27] 9.80%  
Investment, Identifier [Axis]: Dart Buyer, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 11,734  
Fair value at ending balance [4],[7],[14],[15]   $ 11,734
Interest   5.25%
Interest   6.30%
Investment, Identifier [Axis]: DataOnline Corp., High Tech Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[10] $ 14,259  
Interest [1],[2],[8],[10] 6.25%  
Interest [1],[2],[8],[10] 11.00%  
Investment, Identifier [Axis]: DataOnline Corp., High Tech Industries, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[10] $ 2,100  
Interest [1],[2],[8],[10] 6.25%  
Interest [1],[2],[8],[10] 11.00%  
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 1,875  
Interest [1],[2],[16] 6.00%  
Interest [1],[2],[16] 10.30%  
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 96  
Investment owned, balance (in shares) [2],[11] 96,153.85  
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ (11)  
Interest [1],[2],[16] 6.00%  
Interest [1],[2],[16] 10.30%  
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 48  
Investment owned, balance (in shares) [2],[11],[12],[13] 1,280.8  
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 713  
Fair value at ending balance $ 690 [1],[2],[3] $ 713 [7],[14],[22]
Interest 6.00% [1],[2],[3] 6.00%
Interest 10.40% [1],[2],[3] 7.00%
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 55  
Fair value at ending balance [7]   $ 55
Investment owned, balance (in shares)   1,280.8
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] (4)  
Fair value at ending balance $ (3) [1],[2],[3] $ (4) [7],[14],[15]
Interest 6.00% [1],[2],[3] 6.00%
Interest 10.40% [1],[2],[3] 7.00%
Investment, Identifier [Axis]: Discovery Education, Inc., Publishing, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 11,815  
Fair value at ending balance [7],[14],[15]   $ 11,815
Interest   4.75%
Interest   5.80%
Investment, Identifier [Axis]: Distinct Holdings, Inc., Systems Software, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] 6,715  
Fair value at ending balance $ 6,096 [1],[2],[10] $ 6,715 [7],[14],[22]
Interest 6.50% [1],[2],[10] 4.75%
Interest 10.70% [1],[2],[10] 5.80%
Investment, Identifier [Axis]: Dragon Bidco, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[35] $ 2,676  
Fair value at ending balance [4],[7],[14],[35]   $ 2,676
Interest   6.75%
Interest   6.80%
Investment, Identifier [Axis]: Dragon Bidco, Technology, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 2,515  
Interest [1],[2],[17],[20] 6.50%  
Interest [1],[2],[17],[20] 8.10%  
Investment, Identifier [Axis]: Dragon Bidco, Technology, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 1,153  
Interest [1],[2],[17],[26] 6.75%  
Interest [1],[2],[17],[26] 8.90%  
Investment, Identifier [Axis]: DreamStart Bidco SAS (d/b/a SmartTrade), Diversified Financial Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[35] $ 2,385  
Fair value at ending balance $ 2,247 [1],[2],[17],[20] $ 2,385 [4],[7],[14],[35]
Interest 6.00% [1],[2],[17],[20] 5.25%
Interest 8.20% [1],[2],[17],[20] 5.30%
Investment, Identifier [Axis]: Dryden 43 Senior Loan Fund, Series 2016-43A, Multi-Sector Holdings, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[17] $ 2,084  
Investment, Identifier [Axis]: Dryden 49 Senior Loan Fund, Series 2017-49A, Multi-Sector Holdings, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[17] 4,267  
Investment, Identifier [Axis]: Dune Group, Health Care Equipment, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] 1,202  
Fair value at ending balance $ 111 [1],[2],[17],[20] $ 1,202 [4],[7],[14],[15]
Interest 5.75% [1],[2],[17],[20] 5.75%
Interest 8.00% [1],[2],[17],[20] 6.00%
Investment, Identifier [Axis]: Dune Group, Health Care Equipment, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 113  
Fair value at ending balance $ 1,209 [1],[2],[10],[17] $ 113 [4],[7],[14],[28]
Interest 5.75% [1],[2],[10],[17] 5.75%
Interest 10.50% [1],[2],[10],[17] 5.80%
Investment, Identifier [Axis]: Dunlipharder B.V., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16],[17] $ 988  
Interest [1],[2],[16],[17] 6.50%  
Interest [1],[2],[16],[17] 10.70%  
Investment, Identifier [Axis]: Dwyer Instruments, Inc., Electric, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 4,516  
Fair value at ending balance [7],[14],[15]   $ 4,516
Interest   5.50%
Interest   6.30%
Investment, Identifier [Axis]: Dwyer Instruments, Inc., Electric, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 25,287  
Interest [1],[2],[10] 6.00%  
Interest [1],[2],[10] 10.70%  
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Diversified Manufacturing, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 9,136  
Fair value at ending balance $ 12,008 [1],[2],[10] $ 9,136 [7],[14],[15]
Interest 5.75% [1],[2],[10] 5.75%
Interest 10.50% [1],[2],[10] 6.50%
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Diversified Manufacturing, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (59)  
Fair value at ending balance $ 1,409 [1],[2],[10] $ (59) [7],[14],[15]
Interest 5.75% [1],[2],[10] 5.75%
Interest 10.50% [1],[2],[10] 6.50%
Investment, Identifier [Axis]: EPS NASS Parent, Inc., Electrical Components & Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 5,715  
Fair value at ending balance $ 6,024 [1],[2],[10] $ 5,715 [7],[14],[15]
Interest 5.75% [1],[2],[10] 5.75%
Interest 10.50% [1],[2],[10] 6.80%
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Air Transportation, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 531  
Fair value at ending balance $ 933 [2],[11] $ 531 [7]
Investment owned, balance (in shares) 530.92 [2],[11],[12],[13] 530.92
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Air Transportation, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 14,216  
Fair value at ending balance $ 9,100 [1],[2],[10] $ 14,216 [7],[14],[15]
Interest 7.00% [1],[2],[10] 7.25%
Interest 11.70% [1],[2],[10] 8.00%
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 135,066  
Investment owned, balance (in shares) [2],[12],[13] 89,447,396  
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[3] $ 5,273  
Interest [2],[3] 7.25%  
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 4,545  
Interest [2] 7.50%  
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance, & Real Estate, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[47] $ 92,668  
Fair value at ending balance [7],[47]   $ 92,668
Investment owned, balance (in shares) [7],[18],[19],[47]   89,447,396
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance, & Real Estate, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[15],[47] 1,818  
Fair value at ending balance [7],[15],[47]   $ 1,818
Interest [7],[15],[47]   7.25%
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance, & Real Estate, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[47] 4,738  
Fair value at ending balance [7],[47]   $ 4,738
Interest [7],[47]   7.50%
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, LLC units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 92,668 $ 0
Gross Additions 3,380 89,850
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 39,018 2,818
Fair value at ending balance 135,066 92,668
Amount of Interest or Dividends Credited to Income $ 11,223 $ 3,582
Investment owned, balance (in shares) 89,447,396 89,447,396
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 1,818 $ 0
Gross Additions 5,292 1,691
Gross Reductions (1,818) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (19) 127
Fair value at ending balance $ 5,273 1,818
Interest 7.25%  
Amount of Interest or Dividends Credited to Income $ 488 53
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 4,738 0
Gross Additions 5 4,502
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (198) 236
Fair value at ending balance 4,545 4,738
Amount of Interest or Dividends Credited to Income $ 343 $ 170
Interest 7.50% 7.50%
Investment, Identifier [Axis]: Ellkay, LLC, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 4,898  
Fair value at ending balance [7],[14],[15]   $ 4,898
Interest   5.75%
Interest   6.80%
Investment, Identifier [Axis]: Ellkay, LLC, Healthcare and Pharmaceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 4,893  
Interest [1],[2],[10] 6.25%  
Interest [1],[2],[10] 11.00%  
Investment, Identifier [Axis]: Entact Environmental Services, Inc., Environmental Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 5,631  
Fair value at ending balance $ 5,529 [1],[2],[10] $ 5,631 [7],[14],[15]
Interest 5.75% [1],[2],[10] 5.75%
Interest 11.70% [1],[2],[10] 6.80%
Investment, Identifier [Axis]: Eshipping, LLC, Transportation Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 5,795  
Fair value at ending balance [7],[14],[22]   $ 5,795
Interest   5.75%
Interest   6.80%
Investment, Identifier [Axis]: Eshipping, LLC, Transportation Services, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] 225  
Fair value at ending balance [7],[14],[15]   $ 225
Interest   5.75%
Interest   6.80%
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 1,352  
Interest [1],[2],[17],[20] 6.75%  
Interest [1],[2],[17],[20] 8.90%  
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16],[17] $ 745  
Interest [1],[2],[16],[17] 6.75%  
Interest [1],[2],[16],[17] 11.50%  
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[30] $ 2,111  
Interest [1],[2],[17],[30] 6.75%  
Interest [1],[2],[17],[30] 10.00%  
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 4    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 513  
Investment, interest rate, paid in kind [2],[17] 11.50%  
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[48] $ 1,573  
Interest [1],[2],[17],[48] 6.00%  
Interest [1],[2],[17],[48] 9.30%  
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Consumer Cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 7,106  
Interest [1],[2],[27] 6.50%  
Interest [1],[2],[27] 10.30%  
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Consumer Cyclical, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 137  
Interest [1],[2],[27] 6.50%  
Interest [1],[2],[27] 10.30%  
Investment, Identifier [Axis]: F24 (Stairway BidCo Gmbh), Software Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 1,621  
Fair value at ending balance $ 1,644 [1],[2],[17],[20] $ 1,621 [4],[7],[14],[28]
Interest 6.25% [1],[2],[17],[20] 6.00%
Interest 8.10% [1],[2],[17],[20] 6.00%
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 6,790  
Fair value at ending balance $ 6,767 [1],[2],[3] $ 6,790 [7],[14],[15]
Interest 5.75% [1],[2],[3] 5.75% [7],[14],[15]
Interest 10.10% [1],[2],[3] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, LP Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 30  
Fair value at ending balance $ 17 [2],[11] $ 30 [7]
Investment owned, balance (in shares) 1,160.9 [2],[11],[12],[13] 1,160.9 [7],[18],[19]
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 132  
Fair value at ending balance $ 75 [2],[11] $ 132 [7]
Investment owned, balance (in shares) 5,104.3 [2],[11],[12],[13] 5,104.32 [7],[18],[19]
Investment, Identifier [Axis]: Ferrellgas L.P., Oil & Gas Equipment & Services, OpCo Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7] $ 3,146  
Fair value at ending balance [4],[7]   $ 3,146
Investment owned, balance (in shares)   2,886
Investment, Identifier [Axis]: Ferrellgas L.P., Oil & Gas Equipment & Services, Opco Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 2,742  
Investment owned, balance (in shares) [2],[12],[13] 2,886  
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings Inc., Business Equipment & Services, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 6,084  
Investment, interest rate, paid in kind [2] 11.00%  
Investment owned, balance (in shares) [2],[12],[13] 6,582.7  
Investment, Identifier [Axis]: Fineline Technologies, Inc., Consumer Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 1,306  
Fair value at ending balance $ 1,270 [1],[2],[10] $ 1,306 [7],[14],[15]
Interest 4.75% [1],[2],[10] 4.75%
Interest 9.50% [1],[2],[10] 5.80%
Investment, Identifier [Axis]: Finexvet, Consumer Cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 2,329  
Interest [1],[2],[17],[26] 6.25%  
Interest [1],[2],[17],[26] 8.10%  
Investment, Identifier [Axis]: FitzMark Buyer, LLC, Cargo & Transportation, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 4,184  
Fair value at ending balance $ 4,165 [1],[2],[10] $ 4,184 [7],[14],[15]
Interest 4.50% [1],[2],[10] 4.50%
Interest 8.90% [1],[2],[10] 5.50%
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 962  
Investment owned, balance (in shares) [2],[11],[12],[13] 966.99  
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 13,295  
Interest [1],[2],[16] 7.25%  
Interest [1],[2],[16] 12.00%  
Investment, Identifier [Axis]: Flexential Issuer, LLC, Information Technology, Structured Secured Note - Class C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 15,609  
Fair value at ending balance $ 13,827 $ 15,609
Interest 6.90% 6.90%
Investment, Identifier [Axis]: Flywheel Re Segregated Portfolio 2022-4, Investment Funds, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 1,932  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 1,921,648  
Investment, Identifier [Axis]: Footco 40 Limited, Media & Entertainment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[30] $ 1,437  
Interest [1],[2],[17],[30] 5.75%  
Interest [1],[2],[17],[30] 9.20%  
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 1,513  
Interest [1],[2],[27] 5.25%  
Interest [1],[2],[27] 9.90%  
Investment, Identifier [Axis]: FragilePak LLC, Transportation Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 4,541  
Fair value at ending balance $ 4,638 [1],[2],[10] $ 4,541 [7],[14],[22]
Interest 5.75% [1],[2],[10] 5.75% [7],[14],[22]
Interest 10.50% [1],[2],[10] 6.80% [7],[14],[22]
Investment, Identifier [Axis]: FragilePak LLC, Transportation Services, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 926  
Fair value at ending balance $ 1,179 [2],[11] $ 926
Investment owned, balance (in shares) 937.5 [2],[11],[12],[13] 937.5 [18],[19]
Investment, Identifier [Axis]: Front Line Power Construction LLC, Construction Machinery, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 111  
Fair value at ending balance $ 158 [11] $ 111
Investment owned, balance (in shares) 192,000 [11],[12],[13] 50,848 [18],[19]
Investment, Identifier [Axis]: Front Line Power Construction LLC, Construction Machinery, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 3,880  
Fair value at ending balance $ 4,871 [1],[2],[10] $ 3,880 [7],[14],[15]
Interest 12.50% [1],[2],[10] 12.50% [7],[14],[15]
Interest 17.20% [1],[2],[10] 13.50% [7],[14],[15]
Investment, Identifier [Axis]: GB EAGLE BUYER, INC., Capital Goods, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 16,271  
Interest [1],[2],[16] 6.50%  
Interest [1],[2],[16] 10.50%  
Investment, Identifier [Axis]: GB EAGLE BUYER, INC., Capital Goods, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 687  
Investment owned, balance (in shares) [2],[11] 687  
Investment, Identifier [Axis]: GB EAGLE BUYER, INC., Capital Goods, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ (77)  
Interest [1],[2],[16] 6.50%  
Interest [1],[2],[16] 10.50%  
Investment, Identifier [Axis]: GPZN II GmbH, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[31] $ 375  
Interest [1],[2],[17],[31] 5.50%  
Interest [1],[2],[17],[31] 7.40%  
Investment, Identifier [Axis]: GTM Intermediate Holdings, Inc., Medical Equipment Manufacturer, Second Lien Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7] $ 11,500  
Fair value at ending balance $ 10,442 [2],[46] $ 11,500 [6],[7]
Interest 11.00% [2],[46] 11.00% [6],[7]
Investment, interest rate, paid in kind 1.00% [2],[46] 1.00% [6],[7]
Investment, Identifier [Axis]: GTM Intermediate Holdings, Inc., Medical Equipment Manufacturer, Series A Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7] $ 2,290  
Fair value at ending balance $ 2,252 [2],[11],[46] $ 2,290 [6],[7]
Investment owned, balance (in shares) 1,434,472.41 [2],[11],[12],[13],[46] 1,434,472.41 [6],[7],[18],[19]
Investment, Identifier [Axis]: GTM Intermediate Holdings, Inc., Medical Equipment Manufacturer, Series C Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7] $ 1,184  
Fair value at ending balance $ 2,158 [2],[11],[46] $ 1,184 [6],[7]
Investment owned, balance (in shares) 715,649.59 [2],[11],[12],[13],[46] 715,649.59 [6],[7],[18],[19]
Investment, Identifier [Axis]: Global Academic Group Limited, Industrial Other, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[48] $ 2,438  
Interest [1],[2],[17],[48] 6.00%  
Interest [1],[2],[17],[48] 9.10%  
Investment, Identifier [Axis]: Global Academic Group Limited, Industrial Other, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[49] $ 4,242  
Interest [1],[2],[17],[49] 6.00%  
Interest [1],[2],[17],[49] 9.10%  
Investment, Identifier [Axis]: Greenhill II BV, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 716  
Interest [1],[2],[17],[20] 5.75%  
Interest [1],[2],[17],[20] 7.10%  
Investment, Identifier [Axis]: Groupe Product Life, Consumer Non-cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 598  
Interest [1],[2],[17],[20] 6.25%  
Interest [1],[2],[17],[20] 8.50%  
Investment, Identifier [Axis]: Gulf Finance, LLC, Oil & Gas Exploration & Production, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [14],[22] $ 774  
Fair value at ending balance $ 772 [1],[3] $ 774 [14],[22]
Interest 6.75% [1],[3] 6.75% [14],[22]
Interest 11.00% [1],[3] 7.80% [14],[22]
Investment, Identifier [Axis]: Gusto Aus BidCo Pty Ltd., Consumer Non-Cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[37] $ 2,136  
Interest [1],[2],[37] 6.50%  
Interest [1],[2],[37] 10.20%  
Investment, Identifier [Axis]: HEKA Invest, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 4,846  
Interest [1],[2],[17],[20] 6.50%  
Interest [1],[2],[17],[20] 8.70%  
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ (18)  
Interest [1],[2],[16] 8.50%  
Interest [1],[2],[16] 11.70%  
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, Second Lien Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7] $ 22,215  
Fair value at ending balance $ 11,363 [1],[2],[16] $ 22,215 [6],[7]
Interest [1],[2],[16] 8.50%  
Interest 11.70% [1],[2],[16] 12.00% [6],[7]
Investment, interest rate, paid in kind [6],[7]   4.80%
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Advertising, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 13,137  
Fair value at ending balance [7],[14],[22]   $ 13,137
Interest [7],[14],[22]   5.75%
Interest [7],[14],[22]   6.80%
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Advertising, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 4,928  
Interest [1],[2],[10] 5.00%  
Interest [1],[2],[10] 6.00%  
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Advertising, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 5,834  
Interest [1],[2],[3] 5.00%  
Interest [1],[2],[3] 9.30%  
Investment, Identifier [Axis]: Hawaiian Airlines 2020-1 Class B Pass Through Certificates, Airlines, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 7,213  
Fair value at ending balance   $ 7,213
Interest   11.30%
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17],[48] $ 598  
Interest [2],[17],[48] 5.25%  
Interest [2],[17],[48] 8.60%  
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Healthcare, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 9,093  
Fair value at ending balance [7]   $ 9,093
Investment, interest rate, paid in kind [7]   11.00%
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Healthcare, Subordinated Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 1,151  
Investment, interest rate, paid in kind [2] 11.00%  
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Healthcare, Subordinated Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 9,183  
Investment, interest rate, paid in kind [2] 11.00%  
Investment, Identifier [Axis]: Heartland, LLC, Business Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 13,794  
Fair value at ending balance $ 13,795 [1],[2],[10] $ 13,794 [7],[14],[15]
Interest 4.75% [1],[2],[10] 4.75% [7],[14],[15]
Interest 9.50% [1],[2],[10] 5.80% [7],[14],[15]
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 7,221  
Fair value at ending balance $ 7,276 [1],[2],[3] $ 7,221 [7],[14],[15]
Interest 5.75% [1],[2],[3] 5.75% [7],[14],[15]
Interest 9.90% [1],[2],[3] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (53)  
Fair value at ending balance $ (33) [1],[2],[3] $ (53) [7],[14],[15]
Interest 5.75% [1],[2],[3] 5.75% [7],[14],[15]
Interest 9.90% [1],[2],[3] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: Heilbron (f/k/a Sucsez (Bolt Bidco B.V.)), Insurance, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[35] $ 8,612  
Fair value at ending balance $ 3,148 [1],[2],[17],[20] $ 8,612 [4],[7],[14],[35]
Interest 5.00% [1],[2],[17],[20] 5.00% [4],[7],[14],[35]
Interest 6.90% [1],[2],[17],[20] 5.00% [4],[7],[14],[35]
Investment, Identifier [Axis]: Highpoint Global LLC, Government Services, Second Lien Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7] $ 5,416  
Fair value at ending balance [6],[7]   $ 5,416
Interest [6],[7]   12.00%
Investment, interest rate, paid in kind [6],[7]   2.00%
Investment, Identifier [Axis]: Holland Acquisition Corp., Energy: Oil & Gas, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[9],[24] $ 0  
Interest [1],[2],[8],[9],[24] 9.00%  
Investment, Identifier [Axis]: Home Care Assistance, LLC, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 3,753  
Fair value at ending balance $ 3,621 [1],[2],[27] $ 3,753 [7],[14],[15]
Interest 5.00% [1],[2],[27] 4.75% [7],[14],[15]
Interest 9.40% [1],[2],[27] 5.80% [7],[14],[15]
Investment, Identifier [Axis]: Honour Lane Logistics Holdings Limited, Transportation Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[23] $ 7,814  
Interest [1],[2],[17],[23] 5.25%  
Interest [1],[2],[17],[23] 9.50%  
Investment, Identifier [Axis]: Hygie 31 Holding, Pharma-ceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 1,665  
Interest [1],[2],[17],[20] 6.25%  
Interest [1],[2],[17],[20] 8.40%  
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 5,219  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (723)  
Fair value at ending balance 4,496 $ 0
Amount of Interest or Dividends Credited to Income $ 0  
Investment owned, balance (in shares) 102,144  
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Construction & Building, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 4,496  
Investment owned, balance (in shares) [2],[11],[12],[13] 102,144  
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Construction & Building, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 3,917  
Interest [1],[2],[16] 8.00%  
Interest [1],[2],[16] 12.30%  
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Construction & Building, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 4,098  
Interest [1],[2],[16] 10.00%  
Interest [1],[2],[16] 14.30%  
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 3,569  
Gross Reductions 0  
Amount of Realized Gain (Loss) 101  
Amount of Unrealized Gain (Loss) 247  
Fair value at ending balance $ 3,917 0
Interest 8.00%  
Amount of Interest or Dividends Credited to Income $ 380  
Interest 12.30%  
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 4,098  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 4,098 0
Amount of Interest or Dividends Credited to Income $ 382  
Interest 14.30%  
Investment, Identifier [Axis]: IGL Holdings III Corp., Commercial Printing. First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 4,268  
Fair value at ending balance [7],[14],[15]   $ 4,268
Interest [7],[14],[15]   5.75%
Interest [7],[14],[15]   6.80%
Investment, Identifier [Axis]: IM Analytics Holding, LLC (d/b/a NVT), Electronic Instruments & Components, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] 6,603  
Fair value at ending balance $ 3,247 [1],[2],[3] $ 6,603 [7],[14],[15]
Interest 8.00% [1],[2],[3] 7.00% [7],[14],[15]
Interest 12.40% [1],[2],[3] 8.00% [7],[14],[15]
Investment, Identifier [Axis]: IM Analytics Holding, LLC (d/b/a NVT), Electronic Instruments & Components, Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14] $ 0  
Fair value at ending balance $ 0 [2],[11] $ 0 [7],[14]
Investment owned, balance (in shares) 68,950 [2],[11],[12],[13] 68,950 [7],[14],[18],[19]
Investment, Identifier [Axis]: IM Square, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[35] $ 6,938  
Fair value at ending balance $ 2,583 [1],[2],[17],[20] $ 6,938 [4],[7],[14],[35]
Interest 5.25% [1],[2],[17],[20] 5.25% [4],[7],[14],[35]
Interest 7.50% [1],[2],[17],[20] 5.30% [4],[7],[14],[35]
Investment, Identifier [Axis]: INOS 19-090 GmbH, Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 5,263  
Fair value at ending balance $ 4,892 [1],[2],[17],[20] $ 5,263 [4],[7],[14],[28]
Interest 5.40% [1],[2],[17],[20] 6.13% [4],[7],[14],[28]
Interest 7.40% [1],[2],[17],[20] 6.10% [4],[7],[14],[28]
Investment, Identifier [Axis]: ISS#2, LLC (d/b/a Industrial Services Solutions), Commercial Services & Supplies, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 6,407  
Fair value at ending balance [7],[14],[15]   $ 6,407
Interest [7],[14],[15]   5.50%
Interest [7],[14],[15]   6.50%
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 127  
Investment owned, balance (in shares) [2],[11],[12],[13] 1,433.37  
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 705  
Fair value at ending balance $ 703 [1],[2],[3] $ 705 [7],[14],[22]
Interest 4.75% [1],[2],[3] 4.75% [7],[14],[22]
Interest 9.10% [1],[2],[3] 5.80% [7],[14],[22]
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (2)  
Fair value at ending balance $ 5 [1],[2],[3] $ (2) [7],[14],[15]
Interest 4.75% [1],[2],[3] 4.75% [7],[14],[15]
Interest 9.10% [1],[2],[3] 5.80% [7],[14],[15]
Investment, Identifier [Axis]: Infoniqa Holdings GmbH, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 8,989  
Fair value at ending balance $ 2,729 [1],[2],[17],[26] $ 8,989 [4],[7],[14],[28]
Interest 5.25% [1],[2],[17],[26] 5.25% [4],[7],[14],[28]
Interest 6.20% [1],[2],[17],[26] 5.30% [4],[7],[14],[28]
Investment, Identifier [Axis]: Innovad Group II BV, Beverage, Food & Tobacco, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 5,876  
Fair value at ending balance $ 5,495 [1],[2],[17],[26] $ 5,876 [4],[7],[14],[28]
Interest 6.50% [1],[2],[17],[26] 5.75% [4],[7],[14],[28]
Interest 9.30% [1],[2],[17],[26] 5.80% [4],[7],[14],[28]
Investment, Identifier [Axis]: Innovative XCessories & Services, LLC, Automotive, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[8],[24] $ 2,277  
Interest [1],[8],[24] 4.25%  
Interest [1],[8],[24] 7.80%  
Investment, Identifier [Axis]: Interstellar Group B.V., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 1,239  
Interest [1],[2],[17],[20] 5.25%  
Interest [1],[2],[17],[20] 7.50%  
Investment, Identifier [Axis]: Iqor US Inc., Services: Business, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[3],[8] $ 2,658  
Interest [1],[3],[8] 7.50%  
Interest [1],[3],[8] 11.90%  
Investment, Identifier [Axis]: Isagenix International, LLC, Wholesale, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[9],[10] $ 553  
Interest [1],[2],[8],[9],[10] 5.75%  
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), Trading Companies & Distributors, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[31] $ 4,436  
Interest [1],[2],[17],[31] 6.50%  
Interest [1],[2],[17],[31] 8.10%  
Investment, Identifier [Axis]: Ivanti Software, Inc., High Tech Industries, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[10] $ 3,383  
Interest [1],[10] 7.25%  
Interest [1],[10] 12.00%  
Investment, Identifier [Axis]: JF Acquisition, LLC, Automotive, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 3,711  
Fair value at ending balance $ 3,575 [1],[2],[3] $ 3,711 [7],[14],[15]
Interest 5.50% [1],[2],[3] 5.50% [7],[14],[15]
Interest 9.90% [1],[2],[3] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: JSC Tekers Holdings, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0 $ 0
Gross Additions 0 0
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 0 0
Fair value at ending balance 0 0
Amount of Interest or Dividends Credited to Income $ 0 $ 0
Investment owned, balance (in shares) 3,201 3,201
Investment, Identifier [Axis]: JSC Tekers Holdings, Common Stock, Controlled Investment    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 0  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 $ 0
Amount of Interest or Dividends Credited to Income $ 0  
Investment owned, balance (in shares) 35,571  
Investment, Identifier [Axis]: JSC Tekers Holdings, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 6,197 4,753
Gross Additions 0 0
Gross Reductions (6,197) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 0 1,444
Fair value at ending balance 0 6,197
Amount of Interest or Dividends Credited to Income $ 0 $ 0
Investment owned, balance (in shares) 9,159,085 9,159,085
Investment, Identifier [Axis]: JSC Tekers Holdings, Preferred Stock, Controlled Investment    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 6,197  
Gross Reductions (5,832)  
Amount of Realized Gain (Loss) 1,079  
Amount of Unrealized Gain (Loss) (1,444)  
Fair value at ending balance 0 $ 0
Amount of Interest or Dividends Credited to Income 0  
Investment, Identifier [Axis]: JSC Tekers Holdings, Real Estate Management, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[6],[7],[47] 0  
Fair value at ending balance [4],[6],[7],[47]   $ 0
Investment owned, balance (in shares) [4],[6],[7],[18],[19],[47]   3,201
Investment, Identifier [Axis]: JSC Tekers Holdings, Real Estate Management, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[6],[7],[47] 6,197  
Fair value at ending balance [4],[6],[7],[47]   $ 6,197
Investment owned, balance (in shares) [4],[6],[7],[18],[19],[47]   9,159,085
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[25] 2,315  
Fair value at ending balance [4],[7],[14],[25]   $ 2,315
Interest [4],[7],[14],[25]   4.50%
Interest [4],[7],[14],[25]   4.50%
Investment, interest rate, paid in kind [4],[7],[14],[25]   2.00%
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 4,009  
Interest [1],[2],[17],[26] 5.50%  
Interest [1],[2],[17],[26] 7.90%  
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[23] $ 6,592  
Interest [1],[2],[17],[23] 5.50%  
Interest [1],[2],[17],[23] 9.30%  
Investment, Identifier [Axis]: Jaguar Merger Sub Inc., Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 2,486  
Fair value at ending balance $ 7,617 [1],[2],[16] $ 2,486 [7],[14],[15]
Interest 5.00% [1],[2],[16] 5.25% [7],[14],[15]
Interest 9.50% [1],[2],[16] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: Jaguar Merger Sub Inc., Other Financial, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (6)  
Fair value at ending balance $ (2) [1],[2],[16] $ (6) [7],[14],[15]
Interest 5.00% [1],[2],[16] 5.25% [7],[14],[15]
Interest 9.50% [1],[2],[16] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: Jedson Engineering, Inc., Engineering & Construction Management, First Lien Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7] $ 2,650  
Fair value at ending balance $ 2,650 [2],[46] $ 2,650 [6],[7]
Interest 12.00% [2],[46] 12.00% [6],[7]
Investment, Identifier [Axis]: JetBlue 2019-1 Class B Pass Through Trust, Airlines, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 4,805  
Fair value at ending balance $ 3,511 $ 4,805
Interest 8.00% 8.00%
Investment, Identifier [Axis]: Jocassee Partners LLC, Investment Funds & Vehicles, 9.1% Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[47] $ 37,601  
Fair value at ending balance $ 40,088 [17] $ 37,601 [4],[47]
Investment, Identifier [Axis]: Jocassee Partners LLC, Investment Funds & Vehicles, 9.1% Member Interest | Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 9.10% [12],[13],[17] 9.10% [4],[18],[19],[47]
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 37,601 $ 22,624
Gross Additions 5,000 10,000
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (2,513) 4,977
Fair value at ending balance 40,088 37,601
Amount of Interest or Dividends Credited to Income 1,427 $ 0
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest | Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent   9.10%
Investment, Identifier [Axis]: Jon Bidco Limited, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[49] $ 3,477  
Interest [1],[2],[17],[49] 5.50%  
Interest [1],[2],[17],[49] 10.20%  
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 2,745  
Interest [1],[2],[10] 5.75%  
Interest [1],[2],[10] 10.20%  
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 115  
Investment owned, balance (in shares) [2],[11],[12],[13] 974.68  
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ (6)  
Interest [1],[2],[10] 5.75%  
Interest [1],[2],[10] 10.20%  
Investment, Identifier [Axis]: Kano Laboratories LLC, Chemicals, Plastics & Rubber, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[25] $ 8,728  
Fair value at ending balance $ 5,545 [1],[2],[24] $ 8,728 [7],[14],[25]
Interest 5.00% [1],[2],[24] 5.00% [7],[14],[25]
Interest 10.10% [1],[2],[24] 6.00% [7],[14],[25]
Investment, Identifier [Axis]: Kano Laboratories LLC, Chemicals, Plastics & Rubber, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 205  
Fair value at ending balance $ 191 [2],[11] $ 205 [7]
Investment owned, balance (in shares) 203.2 [2],[11],[12],[13] 203.2 [7],[18],[19]
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 1,589  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (408)  
Fair value at ending balance 1,181 $ 0
Amount of Interest or Dividends Credited to Income $ 0  
Investment owned, balance (in shares) 6.78  
Investment, Identifier [Axis]: Kemmerer Operations, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 2,785  
Gross Reductions (1,220)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 1,565 0
Amount of Interest or Dividends Credited to Income $ 307  
Investment, interest rate, paid in kind 15.00%  
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Metals & Mining, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 1,181  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 6.78  
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Metals & Mining, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8] $ 1,565  
Investment, interest rate, paid in kind [2],[8] 15.00%  
Investment, Identifier [Axis]: Kene Acquisition, Inc. (En Engineering), Oil & Gas Equipment & Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 7,080  
Fair value at ending balance $ 7,027 [1],[2],[10] $ 7,080 [7],[14],[22]
Interest 4.25% [1],[2],[10] 4.25% [7],[14],[22]
Interest 9.00% [1],[2],[10] 5.30% [7],[14],[22]
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, Media & Entertainment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 9,174  
Fair value at ending balance $ 9,125 [1],[2],[10] $ 9,174 [7],[14],[15]
Interest 5.75% [1],[2],[10] 6.00% [7],[14],[15]
Interest 10.50% [1],[2],[10] 7.00% [7],[14],[15]
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, Media & Entertainment, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 638  
Fair value at ending balance $ 577 [2],[11] $ 638
Investment owned, balance (in shares) 637,677.11 [2],[11],[12],[13] 637,677.11 [18],[19]
Investment, Identifier [Axis]: Kona Buyer, LLC, High Tech Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 8,994  
Fair value at ending balance $ 8,623 [1],[2],[16] $ 8,994 [7],[14],[15]
Interest 4.75% [1],[2],[16] 5.50% [7],[14],[15]
Interest 9.30% [1],[2],[16] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: LAF International, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[35] $ 1,446  
Fair value at ending balance [4],[7],[14],[35]   $ 1,446
Interest [4],[7],[14],[35]   6.00%
Interest [4],[7],[14],[35]   6.00%
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] 4,810  
Fair value at ending balance $ 4,397 [1],[2],[17],[20] $ 4,810 [4],[7],[14],[28]
Interest 6.00% [1],[2],[17],[20] 6.00% [4],[7],[14],[28]
Interest 8.50% [1],[2],[17],[20] 6.00% [4],[7],[14],[28]
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 295  
Fair value at ending balance [4],[7],[14],[28]   $ 295
Interest [4],[7],[14],[28]   6.00%
Interest [4],[7],[14],[28]   6.00%
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7] 1,375  
Fair value at ending balance $ 1,409 [2],[17] $ 1,375 [4],[7]
Investment, interest rate, paid in kind 12.00% [2],[17] 12.00% [4],[7]
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[23] $ 633  
Interest [1],[2],[17],[23] 5.25%  
Interest [1],[2],[17],[23] 8.30%  
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16],[17] $ 34  
Interest [1],[2],[16],[17] 5.25%  
Interest [1],[2],[16],[17] 9.80%  
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 10,150  
Interest [1],[2],[10] 4.75%  
Interest [1],[2],[10] 9.50%  
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 65  
Investment owned, balance (in shares) [2],[11],[12],[13] 52,493.44  
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ (32)  
Interest [1],[2],[10] 4.75%  
Interest [1],[2],[10] 9.50%  
Investment, Identifier [Axis]: Learfield Communications, LLC, Broadcasting, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [14],[22] $ 128  
Fair value at ending balance $ 100 [1],[3] $ 128 [14],[22]
Interest 3.25% [1],[3] 3.25% [14],[22]
Interest 7.60% [1],[3] 4.30% [14],[22]
Investment, Identifier [Axis]: Learfield Communications, LLC, Broadcasting, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [15] $ 7,959  
Fair value at ending balance $ 8,455 [10] $ 7,959 [15]
Interest 10.00% [10] 3.00% [15]
Interest 3.00% [10] 3.00% [15]
Investment, interest rate, paid in kind [15]   10.20%
Investment, Identifier [Axis]: Legal Solutions Holdings, Business Services, Senior Subordinated Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[45] $ 5,918  
Fair value at ending balance $ 0 [2],[9],[46] $ 5,918 [6],[7],[45]
Investment, interest rate, paid in kind 16.00% [2],[9],[46] 16.00% [6],[7],[45]
Investment, Identifier [Axis]: Liberty Steel Holdings USA Inc., Industrial Other, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 19,846  
Interest [1],[2],[27] 4.50%  
Interest [1],[2],[27] 8.80%  
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Consumer Goods: Durable, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[10] $ 2,980  
Interest [1],[2],[8],[10] 7.00%  
Interest [1],[2],[8],[10] 10.70%  
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Consumer Goods: Durable, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[10] $ (168)  
Interest [1],[2],[8],[10] 7.00%  
Interest [1],[2],[8],[10] 10.70%  
Investment, Identifier [Axis]: LivTech Purchaser, Inc., Business Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 910  
Fair value at ending balance $ 837 [1],[2],[10] $ 910 [7],[14],[15]
Interest 5.00% [1],[2],[10] 5.00% [7],[14],[15]
Interest 9.70% [1],[2],[10] 6.00% [7],[14],[15]
Investment, Identifier [Axis]: LogMeIn, Inc., High Tech Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[3],[8] $ 1,253  
Interest [1],[3],[8] 4.75%  
Interest [1],[3],[8] 9.10%  
Investment, Identifier [Axis]: Long Term Care Group, Inc., Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 7,816  
Interest [1],[2],[3] 6.00%  
Interest [1],[2],[3] 10.30%  
Investment, Identifier [Axis]: MC Group Ventures Corporation, Business Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 3,656  
Fair value at ending balance $ 4,123 [1],[2],[3] $ 3,656 [7],[14],[15]
Interest 5.50% [1],[2],[3] 5.50% [7],[14],[15]
Interest 9.90% [1],[2],[3] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: MC Group Ventures Corporation, Business Services, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 761  
Fair value at ending balance $ 781 [2],[11] $ 761 [7]
Investment owned, balance (in shares) 746.66 [2],[11],[12],[13] 746.66 [7],[18],[19]
Investment, Identifier [Axis]: MNS Buyer, Inc., Construction and Building, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 905  
Fair value at ending balance $ 835 [1],[2],[3] $ 905 [7],[14],[22]
Interest 5.50% [1],[2],[3] 5.50% [7],[14],[22]
Interest 9.90% [1],[2],[3] 6.50% [7],[14],[22]
Investment, Identifier [Axis]: MNS Buyer, Inc., Construction and Building, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 78  
Fair value at ending balance $ 54 [2],[11] $ 78 [7]
Investment owned, balance (in shares) 76.92 [2],[11],[12],[13] 76.92 [7],[18],[19]
Investment, Identifier [Axis]: MSG National Properties, Hotel, Gaming, & Leisure, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 2,486  
Fair value at ending balance [4],[7],[14],[15]   $ 2,486
Interest [4],[7],[14],[15]   7.00%
Interest [4],[7],[14],[15]   6.25%
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Bridge Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 7,149 $ 7,149
Gross Additions 0 0
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 0 0
Fair value at ending balance 7,149 7,149
Amount of Interest or Dividends Credited to Income $ 435 $ 435
Interest   6.00%
Investment, interest rate, paid in kind 6.00%  
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Common Equity Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 7,699 $ 9,582
Gross Additions 0 0
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 1,976 (1,883)
Fair value at ending balance 9,675 7,699
Amount of Interest or Dividends Credited to Income 0 $ 0
Investment owned, balance (in shares)   18,000
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [50] 14,848  
Fair value at ending balance [50]   $ 14,848
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive, Bridge Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[6],[7],[50] 7,149  
Fair value at ending balance $ 7,149 [2],[17],[46] $ 7,149 [4],[6],[7],[50]
Interest 6.00% [2],[12],[13],[17],[46] 6.00% [4],[6],[7],[50]
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive, Common Equity Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[6],[7],[50] $ 7,699  
Fair value at ending balance [4],[6],[7],[50]   $ 7,699
Investment owned, balance (in shares) [4],[6],[7],[18],[19],[50]   18,000
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive, Common Equity interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17],[46] $ 9,675  
Investment owned, balance (in shares) [2],[11],[12],[13],[17],[46] 18,000  
Investment, Identifier [Axis]: MVC Private Equity Fund LP, General Partnership Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 188 $ 225
Gross Additions 0
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (143) (37)
Fair value at ending balance 45 188
Amount of Interest or Dividends Credited to Income (831) $ 643
Investment owned, balance (in shares)   1,831.4
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Investment Funds & Vehicles    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [50] 7,564  
Fair value at ending balance [50]   $ 7,564
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Investment Funds & Vehicles, General Partnership Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[6],[50] 188  
Fair value at ending balance $ 45 [17],[46] 188 [4],[6],[50]
Investment owned, balance (in shares) [12],[13],[17],[46] 1,831.4  
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Investment Funds & Vehicles, Limited Partnership Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[6],[50] $ 7,376  
Fair value at ending balance $ 1,793 [17],[46] 7,376 [4],[6],[50]
Investment owned, balance (in shares) [12],[13],[17],[46] 71,790.4  
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Limited Partnership Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 7,376 8,899
Gross Additions 0 0
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (5,583) (1,523)
Fair value at ending balance 1,793 7,376
Amount of Interest or Dividends Credited to Income 0 $ 0
Investment owned, balance (in shares)   71,790.4
Investment, Identifier [Axis]: Maccamaw River LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0 $ 0
Gross Additions   4,500
Gross Reductions   (4,474)
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   (26)
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income   $ 0
Investment, Identifier [Axis]: Maccamaw River LLC, Member Interest | Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent   50.00%
Investment, Identifier [Axis]: Magnetite XIX, Limited, Multi-Sector Holdings, Subordinated Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[10],[17] $ 4,450  
Interest [8],[10],[17] 8.77%  
Interest [8],[10],[17] 12.80%  
Investment, Identifier [Axis]: Magnetite XIX, Limited, Multi-Sector Holdings, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[17] $ 7,992  
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] 1,880  
Fair value at ending balance $ 2,093 [1],[2],[17],[26] $ 1,880 [4],[7],[14],[28]
Interest 6.00% [1],[2],[17],[26] 5.75% [4],[7],[14],[28]
Interest 8.80% [1],[2],[17],[26] 5.80% [4],[7],[14],[28]
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ (4)  
Fair value at ending balance $ 40 [1],[2],[17],[20] $ (4) [4],[7],[14],[28]
Interest 5.00% [1],[2],[17],[20] 5.00% [4],[7],[14],[28]
Interest 7.80% [1],[2],[17],[20] 5.00% [4],[7],[14],[28]
Investment, Identifier [Axis]: Marshall Excelsior Co., Capital Goods, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 10,794  
Interest [1],[2],[16] 5.50%  
Interest [1],[2],[16] 9.80%  
Investment, Identifier [Axis]: Marshall Excelsior Co., Capital Goods, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[51] $ 1,217  
Interest [1],[2],[51] 4.50%  
Interest [1],[2],[51] 11.50%  
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Containers, Packaging & Glass, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 2,933  
Fair value at ending balance $ 2,903 [1],[2],[16] $ 2,933 [7],[14],[15]
Interest 5.50% [1],[2],[16] 6.00% [7],[14],[15]
Interest 10.30% [1],[2],[16] 7.00% [7],[14],[15]
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Containers, Packaging & Glass, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[29] $ 4,442  
Fair value at ending balance $ 3,894 [1],[2],[41] $ 4,442 [7],[14],[29]
Interest 6.00% [1],[2],[41] 6.00% [7],[14],[29]
Interest 9.40% [1],[2],[41] 7.00% [7],[14],[29]
Investment, Identifier [Axis]: Median B.V., Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[17],[30] $ 7,449  
Interest [1],[17],[30] 6.00%  
Interest [1],[17],[30] 9.40%  
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc., Healthcare, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [14],[15] $ 4,362  
Fair value at ending balance $ 4,067 [1],[3] $ 4,362 [14],[15]
Interest 7.00% [1],[3] 7.00% [14],[15]
Interest 11.40% [1],[3] 7.50% [14],[15]
Investment, Identifier [Axis]: Mercell Holding AS, Technology, Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 116  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 114.4  
Investment, Identifier [Axis]: Mercell Holding AS, Technology, Class B Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 0  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 28,943.8  
Investment, Identifier [Axis]: Mercell Holding AS, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[52] $ 3,102  
Interest [1],[2],[17],[52] 6.00%  
Interest [1],[2],[17],[52] 9.10%  
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited., Non-durable Consumer Goods, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[53] $ 8,299  
Fair value at ending balance $ 7,634 [1],[2],[17],[21] $ 8,299 [4],[7],[14],[53]
Interest 6.25% [1],[2],[17],[21] 6.25% [4],[7],[14],[53]
Interest 9.10% [1],[2],[17],[21] 6.80% [4],[7],[14],[53]
Investment, Identifier [Axis]: Murphy Midco Limited, Media, Diversified & Production, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[40] $ 5,104  
Fair value at ending balance $ 1,150 [1],[2],[17],[33] $ 5,104 [4],[7],[14],[40]
Interest 5.00% [1],[2],[17],[33] 4.75%
Interest 8.20% [1],[2],[17],[33] 4.80%
Investment, Identifier [Axis]: Music Reports, Inc., Media & Entertainment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 7,313  
Fair value at ending balance $ 6,816 [1],[2],[3] $ 7,313 [7],[14],[15]
Interest 5.50% [1],[2],[3] 6.00%
Interest 9.80% [1],[2],[3] 7.00%
Investment, Identifier [Axis]: NGS US Finco, LLC (f/k/a Dresser Natural Gas Solutions), Energy Equipment & Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 4,677  
Fair value at ending balance $ 4,697 [1],[2],[3] $ 4,677 [7],[14],[22]
Interest 4.25% [1],[2],[3] 4.25%
Interest 8.60% [1],[2],[3] 5.30%
Investment, Identifier [Axis]: NPM Investments 28 B.V., Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 2,084  
Interest [1],[2],[17],[20] 6.25%  
Interest [1],[2],[17],[20] 8.50%  
Investment, Identifier [Axis]: Napa Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[37] $ 16,963  
Interest [1],[2],[17],[37] 6.00%  
Interest [1],[2],[17],[37] 9.60%  
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Class A Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 459  
Fair value at ending balance $ 300 [2],[11] $ 459 [7]
Investment owned, balance (in shares) 4,587.38 [2],[11],[12],[13] 4,587.38 [18],[19]
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Class B Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 51  
Fair value at ending balance $ 0 [2],[11] $ 51 [7]
Investment owned, balance (in shares) 509.71 [2],[11],[12],[13] 509.71 [18],[19]
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 5,580  
Fair value at ending balance $ 5,096 [1],[2],[10] $ 5,580 [7],[14],[15]
Interest 5.50% [1],[2],[10] 5.25%
Interest 10.20% [1],[2],[10] 6.30%
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (23)  
Fair value at ending balance $ 5 [1],[2],[10] $ (23) [7],[14],[15]
Interest 5.50% [1],[2],[10] 5.25%
Interest 10.20% [1],[2],[10] 6.30%
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 2,703  
Fair value at ending balance [7],[14],[15]   $ 2,703
Interest   5.25%
Interest   6.30%
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 2,649  
Interest [1],[2],[3] 5.25%  
Interest [1],[2],[3] 9.60%  
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 2,918  
Interest [1],[2],[27] 5.25%  
Interest [1],[2],[27] 9.60%  
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[33] $ 1,508  
Interest [1],[2],[17],[33] 5.25%  
Interest [1],[2],[17],[33] 7.40%  
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Other Financial, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] $ 1,630  
Fair value at ending balance [4],[7],[14],[32]   $ 1,630
Interest   5.25%
Interest   5.30%
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Other Financial, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] 101  
Fair value at ending balance [4],[7],[14],[32]   $ 101
Interest   5.25%
Interest   5.30%
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Other Financial, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[33] $ 184  
Interest [1],[2],[17],[33] 5.25%  
Interest [1],[2],[17],[33] 7.40%  
Investment, Identifier [Axis]: Northstar Recycling, LLC, Environmental Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 2,450  
Fair value at ending balance $ 2,446 [1],[2],[10] $ 2,450 [7],[14],[15]
Interest 4.75% [1],[2],[10] 4.75%
Interest 9.50% [1],[2],[10] 5.80%
Investment, Identifier [Axis]: Novotech Aus Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[37] $ 3,406  
Interest [1],[2],[17],[37] 5.25%  
Interest [1],[2],[17],[37] 8.80%  
Investment, Identifier [Axis]: Novotech Aus Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[23] $ 443  
Interest [1],[2],[17],[23] 5.75%  
Interest [1],[2],[17],[23] 9.60%  
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 8,331  
Fair value at ending balance $ 5,501 [1],[2],[3] $ 8,331 [7],[14],[15]
Interest 5.75% [1],[2],[3] 6.00%
Interest 10.10% [1],[2],[3] 6.80%
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 211  
Fair value at ending balance $ 226 [2],[11] $ 211 [7]
Investment owned, balance (in shares) 210,920.11 [2],[11],[12],[13] 210,920.11 [18],[19]
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (27)  
Fair value at ending balance $ (21) [1],[2],[3] $ (27) [7],[14],[15]
Interest 5.75% [1],[2],[3] 6.80%
Interest 10.10% [1],[2],[3] 6.00%
Investment, Identifier [Axis]: OAC Holdings I Corp, Automotive, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[23] $ 3,567  
Interest [1],[2],[23] 5.00%  
Interest [1],[2],[23] 10.00%  
Investment, Identifier [Axis]: OAC Holdings I Corp, Automotive, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[23] $ 743  
Interest [1],[2],[23] 5.00%  
Interest [1],[2],[23] 10.00%  
Investment, Identifier [Axis]: OG III B.V., Containers & Glass Products, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 2,843  
Fair value at ending balance $ 3,310 [1],[2],[17],[20] $ 2,843 [4],[7],[14],[28]
Interest 5.75% [1],[2],[17],[20] 5.75%
Interest 7.90% [1],[2],[17],[20] 5.80%
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 2,235  
Fair value at ending balance $ 2,190 [1],[2],[10] $ 2,235 [7],[14],[22]
Interest 6.00% [1],[2],[10] 5.75%
Interest 10.20% [1],[2],[10] 6.80%
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 2,206  
Interest [1],[2],[16] 6.00%  
Interest [1],[2],[16] 10.50%  
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 221  
Investment owned, balance (in shares) [2],[11],[12],[13] 60,040  
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (4)  
Fair value at ending balance $ (6) [1],[2],[10] $ (4) [7],[14],[15]
Interest 6.00% [1],[2],[10] 5.75%
Interest 10.20% [1],[2],[10] 6.80%
Investment, Identifier [Axis]: Odeon Cinemas Group Limited, Hotel, Gaming, & Leisure, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7] $ 4,033  
Fair value at ending balance [4],[7]   $ 4,033
Interest   10.80%
Investment, Identifier [Axis]: Offen Inc., Transportation: Cargo, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[3],[8] $ 3,627  
Interest [2],[3],[8] 5.00%  
Interest [2],[3],[8] 8.40%  
Investment, Identifier [Axis]: Omni Intermediate Holdings, LLC, Transportation, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 11,491  
Fair value at ending balance $ 5,995 [1],[2],[16] $ 11,491 [7],[14],[22]
Interest 5.00% [1],[2],[16] 5.00%
Interest 9.70% [1],[2],[16] 6.00%
Investment, Identifier [Axis]: Options Technology Ltd., Computer Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 2,267  
Fair value at ending balance $ 2,251 [1],[2],[17],[24] $ 2,267 [4],[7],[14],[15]
Interest 4.75% [1],[2],[17],[24] 4.50%
Interest 9.00% [1],[2],[17],[24] 5.50%
Investment, Identifier [Axis]: Oracle Vision Bidco Limited, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] $ 3,028  
Fair value at ending balance $ 2,753 [1],[2],[17],[33] $ 3,028 [4],[7],[14],[32]
Interest 4.75% [1],[2],[17],[33] 5.25%
Interest 7.70% [1],[2],[17],[33] 5.30%
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 584  
Fair value at ending balance [4],[7],[14],[15]   $ 584
Interest   5.75%
Interest   6.80%
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 342  
Interest [1],[2],[17],[20] 5.75%  
Interest [1],[2],[17],[20] 7.70%  
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10],[17] $ 577  
Interest [1],[2],[10],[17] 5.75%  
Interest [1],[2],[10],[17] 10.50%  
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 369  
Fair value at ending balance [4],[7],[14],[28]   $ 369
Interest   5.75%
Interest   5.80%
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, Class A-2 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] 29  
Fair value at ending balance $ 41 [2],[11] $ 29 [7]
Investment owned, balance (in shares) 28.8 [2],[11],[12],[13] 26.32 [18],[19]
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 8,707  
Fair value at ending balance $ 8,172 [1],[2],[10] $ 8,707 [7],[14],[15]
Interest 4.75% [1],[2],[10] 5.00%
Interest 9.40% [1],[2],[10] 6.00%
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, Technology, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 829  
Interest [1],[2],[17],[20] 5.25%  
Interest [1],[2],[17],[20] 7.30%  
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, Technology, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10],[17] $ 842  
Interest [1],[2],[10],[17] 5.25%  
Interest [1],[2],[10],[17] 10.00%  
Investment, Identifier [Axis]: Pacific Health Supplies Bidco Pty Limited, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[36] $ 8,529  
Fair value at ending balance [4],[7],[14],[36]   $ 8,529
Interest   6.00%
Interest   6.50%
Investment, Identifier [Axis]: Panoche Energy Center LLC, Electric, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 4,628  
Interest [2] 6.90%  
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[28] $ 4,638  
Fair value at ending balance [4],[7],[28]   $ 4,638
Interest   6.75%
Interest   6.80%
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 2,638  
Interest 5.25%  
Interest 7.10%  
Investment, interest rate, paid in kind [1],[2],[17],[26] 0.75%  
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16],[17] $ 1,455  
Interest [1],[2],[16],[17] 6.50%  
Interest [1],[2],[16],[17] 9.60%  
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), Diversified Financial Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 3,591  
Fair value at ending balance $ 2,702 [1],[2],[17],[20] $ 3,591 [4],[7],[14],[15]
Interest 6.75% [1],[2],[17],[20] 6.75%
Interest 8.50% [1],[2],[17],[20] 7.80%
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), Diversified Financial Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 3,068  
Fair value at ending balance $ 3,159 [1],[2],[10],[17] $ 3,068 [4],[7],[14],[28]
Interest 6.75% [1],[2],[10],[17] 6.75%
Interest 11.40% [1],[2],[10],[17] 6.80%
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 165  
Interest [2],[17] 4.70%  
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 162  
Interest [2],[17] 5.40%  
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 157  
Interest [2],[17] 5.90%  
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class D    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 158  
Interest [2],[17] 8.50%  
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class E    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 8,154  
Interest [2],[17] 11.40%  
Investment, Identifier [Axis]: Permaconn BidCo Pty Ltd, Tele-communications, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[48] $ 2,728  
Interest [1],[2],[17],[48] 6.00%  
Interest [1],[2],[17],[48] 9.10%  
Investment, Identifier [Axis]: Permaconn Bidco Ltd, Tele-communications, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[53] $ 14,599  
Fair value at ending balance [4],[7],[14],[53]   $ 14,599
Interest   6.50%
Interest   6.50%
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 1,210  
Interest [1],[2],[10] 4.75%  
Interest [1],[2],[10] 9.60%  
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 823  
Investment owned, balance (in shares) [2],[11],[12],[13] 7,408.6  
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ (9)  
Interest [1],[2],[10] 4.75%  
Interest [1],[2],[10] 9.60%  
Investment, Identifier [Axis]: Polara Enterprises, LLC, Capital Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 4,158  
Fair value at ending balance [7],[14],[15]   $ 4,158
Interest   4.75%
Interest   5.80%
Investment, Identifier [Axis]: Polara Enterprises, LLC, Capital Equipment, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] 382  
Fair value at ending balance [7]   $ 382
Investment owned, balance (in shares) [18],[19]   3,820.44
Investment, Identifier [Axis]: Polara Enterprises, LLC, Capital Equipment, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] (11)  
Fair value at ending balance [7],[14],[15]   $ (11)
Interest   4.75%
Interest   5.80%
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] 44,008  
Fair value at ending balance $ 48,490 [1],[2],[10] $ 44,008 [7],[14],[15]
Interest 6.00% [1],[2],[10] 6.00%
Interest 8.80% [1],[2],[10] 7.00%
Investment, interest rate, paid in kind 4.00% [1],[2],[10] 4.00%
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 0  
Fair value at ending balance $ 438 [2],[11] $ 0 [7]
Investment owned, balance (in shares) 2.55830 [2],[11],[12],[13] 28,260 [18],[19]
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 0  
Fair value at ending balance $ 148 [2],[11] $ 0 [7]
Investment owned, balance (in shares) 0.86340 [2],[11],[12],[13] 9,537 [18],[19]
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class CC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 0  
Fair value at ending balance $ 0 [2],[11] $ 0 [7]
Investment owned, balance (in shares) 0.08870 [2],[11],[12],[13] 980 [18],[19]
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class D    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 0  
Fair value at ending balance $ 42 [2],[11] $ 0 [7]
Investment owned, balance (in shares) 0.24710 [2],[11],[12],[13] 2,520 [18],[19]
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, Chemicals, Plastics & Rubber, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3],[8] $ 987  
Interest [1],[2],[3],[8] 7.00%  
Interest [1],[2],[3],[8] 11.40%  
Investment, Identifier [Axis]: Premium Franchise Brands, LLC, Research & Consulting Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 14,556  
Fair value at ending balance $ 12,510 [1],[2],[10] $ 14,556 [7],[14],[15]
Interest 6.25% [1],[2],[10] 6.25%
Interest 9.90% [1],[2],[10] 7.30%
Investment, Identifier [Axis]: Premium Invest, Brokerage, Asset Managers & Exchanges, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 4,010  
Fair value at ending balance $ 5,656 [1],[2],[17],[26] $ 4,010 [4],[7],[14],[28]
Interest 5.75% [1],[2],[17],[26] 6.00%
Interest 8.50% [1],[2],[17],[26] 6.00%
Investment, Identifier [Axis]: Preqin MC Limited, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[54] $ 2,764  
Fair value at ending balance $ 2,719 [1],[2],[17],[24] $ 2,764 [4],[7],[14],[54]
Interest 5.25% [1],[2],[17],[24] 5.50%
Interest 8.60% [1],[2],[17],[24] 5.50%
Investment, Identifier [Axis]: Process Equipment, Inc. (ProcessBarron), Industrial Air & Material Handling Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 5,945  
Fair value at ending balance $ 4,907 [1],[2],[16] $ 5,945 [7],[14],[15]
Interest 5.75% [1],[2],[16] 5.25% [7],[14],[15]
Interest 10.30% [1],[2],[16] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: Process Equipment, Inc. (ProcessBarron), Industrial Air & Material Handling Equipment, First Lien Senior Secured Term Loan1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 304  
Interest [1],[2],[3] 6.00%  
Interest [1],[2],[3] 10.40%  
Investment, Identifier [Axis]: Professional Datasolutions, Inc. (PDI), Application Software, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 1,809  
Fair value at ending balance $ 1,751 [1],[2],[10] $ 1,809 [7],[14],[15]
Interest 4.50% [1],[2],[10] 4.50% [7],[14],[15]
Interest 8.70% [1],[2],[10] 5.50% [7],[14],[15]
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[24] $ 1,624  
Interest [1],[2],[24] 5.75%  
Interest [1],[2],[24] 9.60%  
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 172  
Investment owned, balance (in shares) [2],[11],[12],[13] 241,935.48  
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[24] $ (7)  
Interest [1],[2],[24] 5.75%  
Interest [1],[2],[24] 9.60%  
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Second Lien Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 74  
Interest [2] 8.00%  
Investment, Identifier [Axis]: Proppants Holding, LLC, Energy: Oil & Gas, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 0  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 1,668,106  
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 1,365  
Interest [1],[2],[17],[26] 6.00%  
Interest [1],[2],[17],[26] 7.70%  
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 2,195  
Fair value at ending balance [4],[7],[14],[28]   $ 2,195
Interest [4],[7],[14],[28]   5.25%
Interest [4],[7],[14],[28]   5.30%
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] 1,495  
Fair value at ending balance [4],[7],[14],[28]   $ 1,495
Interest [4],[7],[14],[28]   6.00%
Interest [4],[7],[14],[28]   6.00%
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 2,017  
Interest [1],[2],[17],[26] 5.25%  
Interest [1],[2],[17],[26] 7.10%  
Investment, Identifier [Axis]: QPE7 SPV1 BidCo Pty Ltd, Consumer Cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[36] $ 1,605  
Fair value at ending balance $ 1,821 [1],[2],[17],[21] $ 1,605 [4],[7],[14],[36]
Interest 5.50% [1],[2],[17],[21] 5.50% [4],[7],[14],[36]
Interest 8.60% [1],[2],[17],[21] 6.00% [4],[7],[14],[36]
Investment, Identifier [Axis]: Questel Unite, Business Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 6,851  
Fair value at ending balance $ 6,692 [1],[2],[10],[17] $ 6,851 [4],[7],[14],[15]
Interest 6.25% [1],[2],[10],[17] 6.25% [4],[7],[14],[15]
Interest 11.00% [1],[2],[10],[17] 6.80% [4],[7],[14],[15]
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 9,873  
Interest [1],[2],[16] 6.25%  
Interest [1],[2],[16] 10.80%  
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 403  
Interest [1],[2],[16] 6.25%  
Interest [1],[2],[16] 10.80%  
Investment, Identifier [Axis]: RA Outdoors, LLC, High Tech Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[10] $ 12,658  
Interest [1],[2],[8],[10] 6.75%  
Interest [1],[2],[8],[10] 11.40%  
Investment, Identifier [Axis]: RA Outdoors, LLC, High Tech Industries, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[10] $ (25)  
Interest [1],[2],[8],[10] 6.75%  
Interest [1],[2],[8],[10] 11.40%  
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 7,478  
Fair value at ending balance [7],[14],[15]   $ 7,478
Interest [7],[14],[15]   5.00%
Interest [7],[14],[15]   6.00%
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[31] $ 9,438  
Interest [1],[2],[31] 4.75%  
Interest [1],[2],[31] 6.60%  
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 1,274  
Interest [1],[2],[10] 4.75%  
Interest [1],[2],[10] 9.50%  
Investment, Identifier [Axis]: RPX Corporation, Research & Consulting Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 7,455  
Fair value at ending balance $ 7,144 [1],[2],[10] $ 7,455 [7],[14],[15]
Interest 5.50% [1],[2],[10] 6.00% [7],[14],[15]
Interest 9.90% [1],[2],[10] 7.00% [7],[14],[15]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class A Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8] $ 1  
Investment owned, balance (in shares) [2],[8],[12],[13] 145.347  
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class B Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 0  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 145.347  
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class C Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 155  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 7,844.03  
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 0  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 153  
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[27] $ 9,761  
Interest [1],[2],[8],[27] 7.75%  
Interest [1],[2],[8],[27] 12.00%  
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[27] $ 1,480  
Interest [1],[2],[8],[27] 7.75%  
Interest [1],[2],[8],[27] 12.00%  
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 12,708  
Interest [1],[2],[16] 6.50%  
Interest [1],[2],[16] 10.60%  
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 533  
Investment owned, balance (in shares) [2],[11],[12],[13] 5,333  
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 238  
Interest [1],[2],[16] 6.50%  
Interest [1],[2],[16] 10.60%  
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15],[55] $ 11,648  
Fair value at ending balance $ 11,392 [1],[2],[10] $ 11,648 [7],[14],[15],[55]
Interest 6.50% [1],[2],[10] 6.50% [7],[14],[15]
Interest 10.30% [1],[2],[10] 7.50% [7],[14],[15]
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Technology, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 150  
Fair value at ending balance $ 125 [2],[11] $ 150 [7]
Investment owned, balance (in shares) 187,235 [2],[11],[12],[13] 187,235 [7],[18],[19]
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Home Furnishings, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[25] $ 4,733  
Fair value at ending balance $ 4,556 [1],[2],[10] $ 4,733 [7],[14],[25]
Interest 5.50% [1],[2],[10] 5.50% [7],[14],[25]
Interest 10.10% [1],[2],[10] 6.50% [7],[14],[25]
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Home Furnishings, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 203  
Fair value at ending balance $ 152 [2],[11] $ 203 [7]
Investment owned, balance (in shares) 197,368.42 [2],[11],[12],[13] 197,368.42 [7],[18],[19]
Investment, Identifier [Axis]: Resolute Investment Managers, Inc., Banking, Finance, Insurance & Real Estate, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[10] $ 4,243  
Interest [1],[2],[8],[10] 8.00%  
Interest [1],[2],[8],[10] 12.40%  
Investment, Identifier [Axis]: Resonetics, LLC, Health Care Equipment, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 3,930  
Fair value at ending balance $ 3,926 [1],[2],[10] $ 3,930 [7],[14],[15]
Interest 7.00% [1],[2],[10] 7.00% [7],[14],[15]
Interest 11.70% [1],[2],[10] 7.80% [7],[14],[15]
Investment, Identifier [Axis]: Reward Gateway (UK) Ltd, Precious Metals & Minerals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[32] $ 2,776  
Fair value at ending balance $ 2,840 [1],[2],[17],[33] $ 2,776 [4],[7],[14],[32]
Interest 6.25% [1],[2],[17],[33] 6.75% [4],[7],[14],[32]
Interest 8.40% [1],[2],[17],[33] 6.80% [4],[7],[14],[32]
Investment, Identifier [Axis]: Riedel Beheer B.V., Food & Beverage, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 1,843  
Fair value at ending balance $ 2,162 [1],[2],[17],[20] $ 1,843 [4],[7],[14],[28]
Interest 6.25% [1],[2],[17],[20] 5.50% [4],[7],[14],[28]
Interest 8.50% [1],[2],[17],[20] 5.50% [4],[7],[14],[28]
Investment, Identifier [Axis]: Riedel Beheer B.V., Food & Beverage, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ (5)  
Fair value at ending balance [4],[7],[14],[28]   $ (5)
Interest [4],[7],[14],[28]   5.50%
Interest [4],[7],[14],[28]   5.50%
Investment, Identifier [Axis]: Riedel Beheer B.V., Food & Beverage, Super Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] 223  
Fair value at ending balance [4],[7],[14],[28]   $ 223
Interest [4],[7],[14],[28]   5.50%
Interest [4],[7],[14],[28]   5.50%
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 10,808  
Interest [1],[2],[16] 6.00%  
Interest [1],[2],[16] 10.40%  
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 377  
Interest [1],[2],[16] 6.00%  
Interest [1],[2],[16] 10.40%  
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, Media Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 9,543  
Fair value at ending balance $ 9,238 [1],[2],[10] $ 9,543 [7],[14],[15]
Interest 6.00% [1],[2],[10] 6.00% [7],[14],[15]
Interest 10.70% [1],[2],[10] 7.00% [7],[14],[15]
Investment, Identifier [Axis]: SISU ACQUISITIONCO., INC., Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 6,771  
Fair value at ending balance $ 6,376 [1],[2],[10] $ 6,771 [7],[14],[15]
Interest 5.50% [1],[2],[10] 5.25% [7],[14],[15]
Interest 10.20% [1],[2],[10] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: SMART Financial Operations, LLC, Banking, Finance, Insurance & Real Estate, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 110  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 1,000,000  
Investment, Identifier [Axis]: SN BUYER, LLC, Health Care Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 18,394  
Fair value at ending balance $ 10,951 [1],[2],[10] $ 18,394 [7],[14],[22]
Interest 5.75% [1],[2],[10] 5.75% [7],[14],[22]
Interest 10.00% [1],[2],[10] 6.80% [7],[14],[22]
Investment, Identifier [Axis]: SOLO Buyer, L.P., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 22,041  
Interest [1],[2],[16] 6.25%  
Interest [1],[2],[16] 10.40%  
Investment, Identifier [Axis]: SOLO Buyer, L.P., Technology, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 516  
Investment owned, balance (in shares) [2],[11],[12],[13] 516,399  
Investment, Identifier [Axis]: SOLO Buyer, L.P., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ (50)  
Interest [1],[2],[16] 6.25%  
Interest [1],[2],[16] 10.40%  
Investment, Identifier [Axis]: SPT Acquico Limited, High Tech Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 658  
Fair value at ending balance [4],[7],[14],[15]   $ 658
Interest [4],[7],[14],[15]   4.75%
Interest [4],[7],[14],[15]   5.80%
Investment, Identifier [Axis]: SSCP Pegasus Midco Limited, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[29] 2,722  
Fair value at ending balance $ 2,383 [1],[2],[17],[30] $ 2,722 [4],[7],[14],[29]
Interest 6.50% [1],[2],[17],[30] 6.75% [4],[7],[14],[29]
Interest 9.40% [1],[2],[17],[30] 6.80% [4],[7],[14],[29]
Investment, Identifier [Axis]: Safety Products Holdings, LLC, Non-durable Consumer Goods, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 11,755  
Fair value at ending balance $ 11,792 [1],[2],[10] $ 11,755 [7],[14],[22]
Interest 6.00% [1],[2],[10] 6.00% [7],[14],[22]
Interest 11.20% [1],[2],[10] 7.00% [7],[14],[22]
Investment, Identifier [Axis]: Safety Products Holdings, LLC, Non-durable Consumer Goods, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 510  
Fair value at ending balance $ 460 [2],[11] $ 510 [7]
Investment owned, balance (in shares) 372.1 [2],[11],[12],[13] 372.1 [7],[18],[19]
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 1,939  
Interest [1],[2],[17],[26] 5.50%  
Interest [1],[2],[17],[26] 8.20%  
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[56] $ 3,886  
Interest [1],[2],[17],[56] 5.50%  
Interest [1],[2],[17],[56] 5.90%  
Investment, Identifier [Axis]: Scaled Agile, Inc., Research & Consulting Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 1,705  
Fair value at ending balance $ 1,716 [1],[2],[16] $ 1,705 [7],[14],[15]
Interest 5.50% [1],[2],[16] 5.50% [7],[14],[15]
Interest 10.20% [1],[2],[16] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: Scaled Agile, Inc., Research & Consulting Services, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (7)  
Fair value at ending balance $ (3) [1],[2],[16] $ (7) [7],[14],[15]
Interest 5.50% [1],[2],[16] 5.50% [7],[14],[15]
Interest 10.20% [1],[2],[16] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ 6,310  
Interest [1],[2],[17],[20] 6.00%  
Interest [1],[2],[17],[20] 8.00%  
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[20] $ (21)  
Interest [1],[2],[17],[20] 6.00%  
Interest [1],[2],[17],[20] 8.00%  
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 5,451 $ 5,188
Gross Additions 0 263
Gross Reductions (5,451) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 0 0
Fair value at ending balance 0 5,451
Amount of Interest or Dividends Credited to Income $ 0 $ 276
Investment, interest rate, paid in kind 5.00% 5.00%
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 6,020  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 6,020 $ 0
Amount of Interest or Dividends Credited to Income $ 294  
Investment, interest rate, paid in kind 5.00%  
Investment, Identifier [Axis]: Security Holdings B.V, Common Equity Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 24,825 21,329
Gross Additions 0 0
Gross Reductions (24,825) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 0 3,496
Fair value at ending balance 0 24,825
Amount of Interest or Dividends Credited to Income 0 0
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series A, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 560  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 15  
Fair value at ending balance 575 0
Amount of Interest or Dividends Credited to Income $ 0  
Investment owned, balance (in shares) 17,100  
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series B, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 38,753  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 14,975  
Fair value at ending balance 53,728 0
Amount of Interest or Dividends Credited to Income $ 0  
Investment owned, balance (in shares) 1,236  
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 9,525 8,746
Gross Additions 0 779
Gross Reductions (9,525) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 0 0
Fair value at ending balance 0 9,525
Amount of Interest or Dividends Credited to Income $ 0 $ 285
Investment, interest rate, paid in kind 3.10% 3.10%
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Note, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 14,567  
Gross Reductions (13,754)  
Amount of Realized Gain (Loss) (813)  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 $ 0
Amount of Interest or Dividends Credited to Income $ 174  
Investment, interest rate, paid in kind 5.00%  
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Term Loan, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 10,534  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 10,534 0
Amount of Interest or Dividends Credited to Income $ 356  
Investment, interest rate, paid in kind 3.10%  
Investment, Identifier [Axis]: Security Holdings B.V, Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 7,307 0
Gross Additions 0 8,831
Gross Reductions (7,307) (1,168)
Amount of Realized Gain (Loss) 0 (24)
Amount of Unrealized Gain (Loss) 0 (332)
Fair value at ending balance 0 7,307
Amount of Interest or Dividends Credited to Income $ 0 $ 820
Investment, interest rate, paid in kind 9.00% 9.00%
Investment, Identifier [Axis]: Security Holdings B.V, Senior Unsecured Term Loan, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 7,795  
Gross Reductions (4,975)  
Amount of Realized Gain (Loss) (988)  
Amount of Unrealized Gain (Loss) 183  
Fair value at ending balance 2,015 $ 0
Amount of Interest or Dividends Credited to Income $ 825  
Interest 6.00%  
Investment, interest rate, paid in kind 9.00%  
Investment, Identifier [Axis]: Security Holdings B.V. Electrical Engineering    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5] $ 47,108  
Fair value at ending balance [5]   47,108
Investment, Identifier [Axis]: Security Holdings B.V. Electrical Engineering, Bridge Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[5],[6],[7] 5,451  
Fair value at ending balance [4],[5],[6],[7]   $ 5,451
Investment, interest rate, paid in kind [4],[5],[6],[7]   5.00%
Investment, Identifier [Axis]: Security Holdings B.V. Electrical Engineering, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[5],[6],[7] 24,825  
Fair value at ending balance [4],[5],[6],[7]   $ 24,825
Investment owned, balance (in shares) [5],[18],[19]   900
Investment, Identifier [Axis]: Security Holdings B.V. Electrical Engineering, Senior Subordinated Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[5],[6],[7] 9,525  
Fair value at ending balance [4],[5],[6],[7]   $ 9,525
Investment, interest rate, paid in kind [4],[5],[6],[7]   3.10%
Investment, Identifier [Axis]: Security Holdings B.V. Electrical Engineering, Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[5],[6],[7] 7,307  
Fair value at ending balance [4],[5],[6],[7]   $ 7,307
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Bridge Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17],[46] $ 6,020  
Investment, interest rate, paid in kind [2],[17],[46] 5.00%  
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17],[46] $ 575  
Investment owned, balance (in shares) [2],[11],[12],[13],[17],[46] 17,100  
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17],[46] $ 53,728  
Investment owned, balance (in shares) [2],[11],[12],[13],[17],[46] 1,236  
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17],[46] $ 10,534  
Investment, interest rate, paid in kind [2],[17],[46] 3.10%  
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17],[46] $ 2,015  
Interest [2],[17],[46] 6.00%  
Investment, interest rate, paid in kind [2],[17],[46] 9.00%  
Investment, Identifier [Axis]: Sereni Capital NV, Consumer Cyclical, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 348  
Interest [1],[2],[17],[26] 5.75%  
Interest [1],[2],[17],[26] 8.20%  
Investment, Identifier [Axis]: Sereni Capital NV, Consumer Cyclical, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 479  
Interest [1],[2],[17],[26] 5.75%  
Interest [1],[2],[17],[26] 8.20%  
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Home Furnishings, Super Priority First Out    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [14],[22] $ 7,409  
Fair value at ending balance $ 7,148 [1],[10] $ 7,409 [14],[22]
Interest 7.50% [1],[10] 7.50% [14],[22]
Interest 12.30% [1],[10] 8.50% [14],[22]
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Home Furnishings, Super Priority Second Out    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [14],[22] $ 3,365  
Fair value at ending balance $ 1,625 [1],[10] $ 3,365 [14],[22]
Interest 7.50% [1],[10] 7.50% [14],[22]
Interest 12.30% [1],[10] 8.50% [14],[22]
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 1,200  
Investment owned, balance (in shares) [2],[11],[17] 1,200,000  
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16],[17] $ 33,720  
Interest [1],[2],[16],[17] 6.00%  
Interest [1],[2],[16],[17] 10.70%  
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Joint Venture, 89.01% Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[17] $ 37,950  
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Joint Venture, 89.01% Member Interest | Sierra Senior Loan Strategy JV I, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent [8],[12],[13],[17] 89.01%  
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions 85,963  
Gross Reductions (35,742)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (12,271)  
Fair value at ending balance 37,950 $ 0
Amount of Interest or Dividends Credited to Income 4,526  
Investment, Identifier [Axis]: Smartling, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] 16,094  
Fair value at ending balance $ 13,393 [1],[2],[3] $ 16,094 [7],[14],[15]
Interest 5.75% [1],[2],[3] 5.75% [7],[14],[15]
Interest 10.10% [1],[2],[3] 6.80% [7],[14],[15]
Investment, Identifier [Axis]: Smartling, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (24)  
Fair value at ending balance $ (24) [1],[2],[3] $ (24) [7],[14],[15]
Interest 5.75% [1],[2],[3] 5.75% [7],[14],[15]
Interest 10.10% [1],[2],[3] 6.80% [7],[14],[15]
Investment, Identifier [Axis]: Smile Brands Group Inc., Health Care Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 4,553  
Fair value at ending balance $ 4,196 [1],[2],[24] $ 4,553 [7],[14],[15]
Interest 4.50% [1],[2],[24] 4.50% [7],[14],[15]
Interest 7.90% [1],[2],[24] 5.30% [7],[14],[15]
Investment, Identifier [Axis]: Smile Brands Group Inc., Health Care Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (6)  
Fair value at ending balance $ 565 [1],[2],[24] $ (6) [7],[14],[15]
Interest 4.50% [1],[2],[24] 4.50% [7],[14],[15]
Interest 7.90% [1],[2],[24] 5.30% [7],[14],[15]
Investment, Identifier [Axis]: Soho Square III Debtco II SARL, Diversified Capital Markets, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 5,616  
Investment, interest rate, paid in kind [2],[17] 9.50%  
Investment, Identifier [Axis]: Sound Point CLO XX, Ltd., Multi-Sector Holdings, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[17] $ 1,192  
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 1,621  
Interest [1],[2],[16] 5.00%  
Interest [1],[2],[16] 9.60%  
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ (4)  
Interest [1],[2],[16] 5.00%  
Interest [1],[2],[16] 9.60%  
Investment, Identifier [Axis]: Spatial Business Systems LLC, Electric, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 5,754  
Interest [1],[2],[27] 5.50%  
Interest [1],[2],[27] 9.70%  
Investment, Identifier [Axis]: Spatial Business Systems LLC, Electric, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ (35)  
Interest [1],[2],[27] 5.50%  
Interest [1],[2],[27] 9.70%  
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Enterprise Software & Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 10,346  
Fair value at ending balance [7],[14],[15]   $ 10,346
Interest [7],[14],[15]   5.50%
Interest [7],[14],[15]   6.50%
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Enterprise Software & Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 20,510  
Interest [1],[2],[3] 5.75%  
Interest [1],[2],[3] 10.10%  
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Enterprise Software & Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 2,763  
Interest [1],[2],[16] 6.50%  
Interest [1],[2],[16] 11.10%  
Investment, Identifier [Axis]: Starnmeer B.V., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 7,388  
Fair value at ending balance $ 2,477 [1],[2],[10],[17] $ 7,388 [4],[7],[14],[15]
Interest 6.30% [1],[2],[10],[17] 6.40% [4],[7],[14],[15]
Interest 10.70% [1],[2],[10],[17] 6.90% [4],[7],[14],[15]
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 22,711  
Fair value at ending balance $ 12,860 [1],[2],[10] $ 22,711 [7],[14],[15]
Interest 5.75% [1],[2],[10] 5.75% [7],[14],[15]
Interest 10.50% [1],[2],[10] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (37)  
Fair value at ending balance $ (26) [1],[2],[10] $ (37) [7],[14],[15]
Interest 5.75% [1],[2],[10] 5.75% [7],[14],[15]
Interest 10.50% [1],[2],[10] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: Syniverse Holdings, Inc., Technology Distributors, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [14],[15] $ 17,192  
Fair value at ending balance [14],[15]   $ 17,192
Interest [14],[15]   5.00%
Interest [14],[15]   6.00%
Investment, Identifier [Axis]: Syniverse Holdings, Inc., Technology Distributors, Series A Preferred Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 6,515  
Investment, interest rate, paid in kind [2] 12.50%  
Investment owned, balance (in shares) [2],[12],[13] 7,575,758  
Investment, Identifier [Axis]: Syntax Systems Ltd, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[22] $ 2,016  
Fair value at ending balance $ 1,812 [1],[2],[3],[17] $ 2,016 [4],[7],[14],[22]
Interest 5.75% [1],[2],[3],[17] 5.50% [4],[7],[14],[22]
Interest 10.10% [1],[2],[3],[17] 6.30% [4],[7],[14],[22]
Investment, Identifier [Axis]: Syntax Systems Ltd, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[22] $ 432  
Fair value at ending balance $ 622 [1],[2],[3],[17] $ 432 [4],[7],[14],[22]
Interest 5.75% [1],[2],[3],[17] 5.50% [4],[7],[14],[22]
Interest 10.10% [1],[2],[3],[17] 6.30% [4],[7],[14],[22]
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Technology, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 65  
Fair value at ending balance $ 60 [2],[11] $ 65 [7]
Investment owned, balance (in shares) 1,589 [2],[11],[12],[13] 1,227.9 [7],[18],[19]
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Technology, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 1,960  
Fair value at ending balance $ 2,110 [2] $ 1,960 [7]
Investment, interest rate, paid in kind 7.80% [2] 8.80% [7]
Investment, Identifier [Axis]: TANQUERAY BIDCO LIMITED, Technology. First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[30] $ 1,557  
Interest [1],[2],[17],[30] 6.25%  
Interest [1],[2],[17],[30] 8.40%  
Investment, Identifier [Axis]: TSM II Luxco 10 SARL, Chemical & Plastics, Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17] $ 11,118  
Investment, interest rate, paid in kind [1],[2],[17] 9.30%  
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 591  
Interest [1],[2],[16] 4.75%  
Interest [1],[2],[16] 9.20%  
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 5  
Investment owned, balance (in shares) [2],[11],[12],[13] 4,673  
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ (4)  
Interest [1],[2],[16] 4.75%  
Interest [1],[2],[16] 9.20%  
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 10,877  
Interest [1],[2],[27] 5.75%  
Interest [1],[2],[27] 10.20%  
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 157  
Interest [1],[2],[27] 5.75%  
Interest [1],[2],[27] 10.20%  
Investment, Identifier [Axis]: Team Car Care, LLC, Automotive, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[10] $ 11,970  
Interest [1],[2],[8],[10] 8.00%  
Interest [1],[2],[8],[10] 11.80%  
Investment, Identifier [Axis]: Team Services Group, Services: Consumer, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[24] $ 9,345  
Interest [1],[2],[8],[24] 5.00%  
Interest [1],[2],[8],[24] 9.90%  
Investment, Identifier [Axis]: Team Services Group, Services: Consumer, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[8],[24] $ 4,700  
Interest [1],[2],[8],[24] 9.00%  
Interest [1],[2],[8],[24] 13.90%  
Investment, Identifier [Axis]: Techone B.V., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 8,441  
Fair value at ending balance $ 3,578 [1],[2],[17],[20] $ 8,441 [4],[7],[14],[28]
Interest 5.50% [1],[2],[17],[20] 5.50% [4],[7],[14],[28]
Interest 7.90% [1],[2],[17],[20] 5.50% [4],[7],[14],[28]
Investment, Identifier [Axis]: Techone B.V., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 97  
Fair value at ending balance $ 281 [1],[2],[17],[20] $ 97 [4],[7],[14],[28]
Interest 5.50% [1],[2],[17],[20] 5.50% [4],[7],[14],[28]
Interest 7.90% [1],[2],[17],[20] 5.50% [4],[7],[14],[28]
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 5,374  
Fair value at ending balance [7],[14],[15]   $ 5,374
Interest [7],[14],[15]   5.50%
Interest [7],[14],[15]   6.50%
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 871  
Interest [1],[2],[10] 5.00%  
Interest [1],[2],[10] 9.70%  
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 5,368  
Interest [1],[2],[10] 5.00%  
Interest [1],[2],[10] 9.70%  
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (20)  
Fair value at ending balance $ (13) [1],[2],[10] $ (20) [7],[14],[15]
Interest 5.00% [1],[2],[10] 5.50% [7],[14],[15]
Interest 9.70% [1],[2],[10] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: Terrybear, Inc., Consumer Products, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 255  
Investment owned, balance (in shares) [2],[11],[12],[13] 24,358.97  
Investment, Identifier [Axis]: Terrybear, Inc., Consumer Products, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 259  
Interest [2] 10.00%  
Investment, interest rate, paid in kind [2] 4.00%  
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 776  
Fair value at ending balance $ 798 [1],[2],[10] $ 776 [7],[14],[15]
Interest 4.25% [1],[2],[10] 4.25% [7],[14],[15]
Interest 9.00% [1],[2],[10] 5.30% [7],[14],[15]
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (14)  
Fair value at ending balance $ (9) [1],[2],[10] $ (14) [7],[14],[15]
Interest 4.25% [1],[2],[10] 4.25% [7],[14],[15]
Interest 9.00% [1],[2],[10] 5.30% [7],[14],[15]
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 3,267  
Fair value at ending balance $ 3,380 [1],[2],[24] $ 3,267 [7]
Interest [1],[2],[24] 7.75%  
Interest [1],[2],[24] 12.70%  
Investment, interest rate, paid in kind [7]   7.80%
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Industrial Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[27] $ 25,979  
Interest [1],[2],[27] 5.75%  
Interest [1],[2],[27] 10.10%  
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Industrial Equipment, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 5,547  
Investment, interest rate, paid in kind [2] 11.00%  
Investment, Identifier [Axis]: The Hilb Group, LLC, Insurance Brokerage, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 19,874  
Fair value at ending balance $ 1,578 [1],[2],[3] $ 19,874 [7],[14],[15]
Interest 5.50% [1],[2],[3] 5.75% [7],[14],[15]
Interest 9.90% [1],[2],[3] 6.80% [7],[14],[15]
Investment, Identifier [Axis]: The Hilb Group, LLC, Insurance Brokerage, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ (2)  
Fair value at ending balance $ 5,560 [1],[2],[3] $ (2) [7],[14],[15]
Interest 5.75% [1],[2],[3] 5.50% [7],[14],[15]
Interest 10.10% [1],[2],[3] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: The Hilb Group, LLC, Insurance Brokerage, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 14,178  
Interest [1],[2],[3] 5.75%  
Interest [1],[2],[3] 10.10%  
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 1,019  
Investment owned, balance (in shares) [2],[11],[12],[13] 676,880.98  
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 12,322  
Interest [1],[2],[16] 7.50%  
Interest [1],[2],[16] 12.10%  
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] $ 84,438  
Fair value at ending balance [4]   $ 84,438
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles | Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent [4],[18],[19]   15.90%
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles, 16.0% Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [17] $ 30,339  
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles, 16.0% Member Interest | Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent [12],[13],[17] 16.00%  
Investment, Identifier [Axis]: Thompson Rivers LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 84,438 $ 10,012
Gross Additions 0 69,414
Gross Reductions (32,793) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (21,306) 5,012
Fair value at ending balance 30,339 84,438
Amount of Interest or Dividends Credited to Income 9,056 $ 4,776
Investment, Identifier [Axis]: Thompson Rivers LLC, Member Interest | Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent   15.90%
Investment, Identifier [Axis]: Total Safety U.S. Inc., Diversified Support Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [14],[25] 6,482  
Fair value at ending balance [14],[25]   $ 6,482
Interest [14],[25]   6.00%
Interest [14],[25]   7.00%
Investment, Identifier [Axis]: Total Safety U.S. Inc., Diversified Support Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[10] $ 5,801  
Interest [1],[10] 6.00%  
Interest [1],[10] 10.70%  
Investment, Identifier [Axis]: Total Safety U.S. Inc., Diversified Support Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 3,561  
Interest [1],[2],[10] 6.00%  
Interest [1],[2],[10] 10.70%  
Investment, interest rate, paid in kind [1],[2],[10] 5.00%  
Investment, Identifier [Axis]: Trader Corporation, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[57] $ 4,486  
Interest [1],[2],[17],[57] 6.75%  
Interest [1],[2],[17],[57] 11.60%  
Investment, Identifier [Axis]: Trader Corporation, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[57] $ (9)  
Interest [1],[2],[17],[57] 6.75%  
Interest [1],[2],[17],[57] 11.60%  
Investment, Identifier [Axis]: Transit Technologies LLC, Software, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 5,846  
Fair value at ending balance $ 5,872 [1],[2],[24] $ 5,846 [7],[14],[15]
Interest 5.00% [1],[2],[24] 4.75% [7],[14],[15]
Interest 7.90% [1],[2],[24] 5.80% [7],[14],[15]
Investment, Identifier [Axis]: Transportation Insight, LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 11,160  
Fair value at ending balance $ 11,032 [1],[2],[10] $ 11,160 [7],[14],[22]
Interest 4.25% [1],[2],[10] 4.50% [7],[14],[22]
Interest 8.70% [1],[2],[10] 4.60% [7],[14],[22]
Investment, Identifier [Axis]: Trident Maritime Systems, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 14,888  
Fair value at ending balance $ 14,570 [1],[2],[10] $ 14,888 [7],[14],[15]
Interest 4.75% [1],[2],[10] 5.50% [7],[14],[15]
Interest 9.50% [1],[2],[10] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Automotive Parts & Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 14,611  
Fair value at ending balance $ 18,756 [1],[2],[16] $ 14,611 [7],[14],[15]
Interest 6.25% [1],[2],[16] 6.25% [7],[14],[15]
Interest 11.10% [1],[2],[16] 7.30% [7],[14],[15]
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 0  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 2.71  
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Preferred Unit    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 0  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 2.8  
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, Class A LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 412  
Fair value at ending balance $ 512 [2],[11] $ 412 [7]
Investment owned, balance (in shares) 440.97 [2],[11],[12],[13] 440.97 [7],[18],[19]
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 11,778  
Fair value at ending balance [7],[14],[15]   $ 11,778
Interest [7],[14],[15]   5.25%
Interest [7],[14],[15]   6.30%
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[24] $ 3,075  
Interest [1],[2],[24] 4.75%  
Interest [1],[2],[24] 9.90%  
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 3,750  
Interest [1],[2],[10] 5.00%  
Interest [1],[2],[10] 9.60%  
Investment, Identifier [Axis]: Turbo Buyer, Inc., Finance Companies, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 8,220  
Fair value at ending balance $ 8,061 [1],[2],[10] $ 8,220 [7],[14],[15]
Interest 6.00% [1],[2],[10] 6.00% [7],[14],[15]
Interest 10.70% [1],[2],[10] 7.00% [7],[14],[15]
Investment, Identifier [Axis]: Turf Products, LLC, Landscaping & Irrigation Equipment Distributor, Senior Subordinated Debt    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7] $ 8,627  
Fair value at ending balance [6],[7]   $ 8,627
Interest [6],[7]   10.00%
Investment, Identifier [Axis]: Turnberry Solutions, Inc., Consumer Cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] 4,423  
Fair value at ending balance $ 4,900 [1],[2],[16] $ 4,423 [7],[14],[15]
Interest 6.25% [1],[2],[16] 6.00% [7],[14],[15]
Interest 9.20% [1],[2],[16] 7.00% [7],[14],[15]
Investment, Identifier [Axis]: U.S. Gas & Electric, Inc., Energy Services, Second Lien Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7] $ 1,785  
Fair value at ending balance [6],[7]   $ 1,785
Interest [6],[7]   9.50%
Investment, Identifier [Axis]: U.S. Gas & Electric, Inc., Energy Services, Second Lien Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[58] 0  
Fair value at ending balance [6],[7],[58]   $ 0
Interest [6],[7],[58]   9.50%
Investment, Identifier [Axis]: U.S. Silica Company, Metal & Glass Containers, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[14],[22] 1,437  
Fair value at ending balance $ 1,439 [1],[3],[17] $ 1,437 [4],[14],[22]
Interest 4.00% [1],[3],[17] 4.00% [4],[14],[22]
Interest 8.40% [1],[3],[17] 5.00% [4],[14],[22]
Investment, Identifier [Axis]: UKFast Leaders Limited, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[34] $ 12,090  
Fair value at ending balance $ 9,677 [1],[2],[17],[30] $ 12,090 [4],[7],[14],[34]
Interest 7.25% [1],[2],[17],[30] 7.00% [4],[7],[14],[34]
Interest 10.80% [1],[2],[17],[30] 7.10% [4],[7],[14],[34]
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), Legal Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 16,222  
Fair value at ending balance [7],[14],[15]   $ 16,222
Interest [7],[14],[15]   5.75%
Interest [7],[14],[15]   6.80%
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), Legal Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 15,390  
Interest [1],[2],[16] 5.75%  
Interest [1],[2],[16] 10.50%  
Investment, Identifier [Axis]: Union Bidco Limited, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[30] $ 847  
Interest [1],[2],[17],[30] 5.75%  
Interest [1],[2],[17],[30] 9.20%  
Investment, Identifier [Axis]: United Therapy Holding III GmbH, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[26] $ 1,180  
Interest [1],[2],[17],[26] 5.50%  
Interest [1],[2],[17],[26] 8.30%  
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[28] $ 1,673  
Fair value at ending balance $ 1,585 [1],[2],[17],[20] $ 1,673 [4],[7],[14],[28]
Interest 6.00% [1],[2],[17],[20] 5.25% [4],[7],[14],[28]
Interest 8.20% [1],[2],[17],[20] 5.30% [4],[7],[14],[28]
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[14],[15] $ 3,451  
Fair value at ending balance $ 3,483 [1],[2],[10],[17] $ 3,451 [4],[7],[14],[15]
Interest 5.25% [1],[2],[10],[17] 5.25% [4],[7],[14],[15]
Interest 8.90% [1],[2],[10],[17] 5.50% [4],[7],[14],[15]
Investment, Identifier [Axis]: VOYA CLO 2015-2, LTD., Multi-Sector Holdings, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[17] $ 91  
Investment, Identifier [Axis]: VOYA CLO 2016-2, LTD., Multi-Sector Holdings, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[17] 1,551  
Investment, Identifier [Axis]: Validity, Inc., IT Consulting & Other Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] 4,764  
Fair value at ending balance $ 4,673 [1],[2],[3] $ 4,764 [7],[14],[22]
Interest 4.75% [1],[2],[3] 4.75% [7],[14],[22]
Interest 9.10% [1],[2],[3] 4.80% [7],[14],[22]
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 2  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 4,676  
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 3  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 5,591  
Investment, Identifier [Axis]: Victoria Bidco Limited, Industrial Machinery, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[33] $ 3,238  
Interest [1],[2],[17],[33] 6.50%  
Interest [1],[2],[17],[33] 7.70%  
Investment, Identifier [Axis]: Victoria Bidco Limited, Industrial Machinery, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[30] $ 407  
Interest [1],[2],[17],[30] 6.50%  
Interest [1],[2],[17],[30] 8.70%  
Investment, Identifier [Axis]: Vision Solutions Inc., Business Equipment & Services, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[8],[10] $ 4,771  
Interest [1],[8],[10] 7.25%  
Interest [1],[8],[10] 11.60%  
Investment, Identifier [Axis]: VistaJet Pass Through Trust 2021-1B, Airlines, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 4,905  
Fair value at ending balance $ 3,792 [2] $ 4,905
Interest 6.30% [2] 6.30%
Investment, Identifier [Axis]: Vital Buyer, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 7,676  
Fair value at ending balance $ 7,645 [1],[2],[10] $ 7,676 [7],[14],[15]
Interest 5.50% [1],[2],[10] 5.50% [7],[14],[15]
Interest 10.20% [1],[2],[10] 6.30% [7],[14],[15]
Investment, Identifier [Axis]: Vital Buyer, LLC, Technology, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 171  
Fair value at ending balance $ 293 [2],[11] $ 171 [7]
Investment owned, balance (in shares) 16,442.9 [2],[11],[12],[13] 16,442.9 [7],[18],[19]
Investment, Identifier [Axis]: W2O Holdings, Inc., Healthcare Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 2,152  
Fair value at ending balance [7],[14],[15]   $ 2,152
Interest [7],[14],[15]   4.75%
Interest [7],[14],[15]   5.80%
Investment, Identifier [Axis]: W2O Holdings, Inc., Healthcare Technology, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 3,302  
Interest [1],[2],[10] 4.75%  
Interest [1],[2],[10] 9.50%  
Investment, Identifier [Axis]: WWEC Holdings III CORP, Capital Goods, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 13,937  
Interest [1],[2],[16] 6.00%  
Interest [1],[2],[16] 10.60%  
Investment, Identifier [Axis]: WWEC Holdings III CORP, Capital Goods, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[16] $ 1,056  
Interest [1],[2],[16] 6.00%  
Interest [1],[2],[16] 10.60%  
Investment, Identifier [Axis]: Waccamaw River LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 13,501 $ 0
Gross Additions   13,763
Gross Reductions   (68)
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   (194)
Fair value at ending balance   13,501
Amount of Interest or Dividends Credited to Income   $ 280
Investment, Identifier [Axis]: Waccamaw River LLC | Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent   20.00%
Investment, Identifier [Axis]: Waccamaw River LLC, Investment Funds & Vehicles    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] 13,501  
Fair value at ending balance [4]   $ 13,501
Investment, Identifier [Axis]: Waccamaw River LLC, Investment Funds & Vehicles | Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent [4],[18],[19]   20.00%
Investment, Identifier [Axis]: Waccamaw River LLC, Investment Funds & Vehicles, 20% Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [17] 20,212  
Investment, Identifier [Axis]: Waccamaw River LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 13,501  
Gross Additions 8,800  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (2,089)  
Fair value at ending balance 20,212 $ 13,501
Amount of Interest or Dividends Credited to Income 1,850  
Investment, Identifier [Axis]: Walker Edison Furniture Company LLC, Consumer Goods: Durable, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 0  
Investment owned, balance (in shares) [2],[8],[11],[12],[13] 2,819.53  
Investment, Identifier [Axis]: Watermill-QMC Midco, Inc., Automotive, Equity (1.62% Partnership Interest)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[8],[11] $ 0  
Investment, Identifier [Axis]: Wawona Delaware Holdings, LLC, Beverage & Food, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[10] $ 33  
Interest [8],[10] 4.75%  
Interest [8],[10] 9.20%  
Investment, Identifier [Axis]: Wheels Up Experience Inc, Transportation Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2] $ 13,153  
Interest [2] 12.00%  
Investment, Identifier [Axis]: Wok Holdings Inc., Retail, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[8],[10] $ 41  
Interest [1],[8],[10] 6.50%  
Interest [1],[8],[10] 11.20%  
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 1,663  
Fair value at ending balance $ 1,012 [2],[11] $ 1,663 [7]
Investment owned, balance (in shares) 1,663.31 [2],[11],[12],[13] 1,663,307.18 [7],[18],[19]
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 11,282  
Fair value at ending balance $ 4,882 [1],[2],[10] $ 11,282 [7],[14],[15]
Interest 5.75% [1],[2],[10] 5.50% [7],[14],[15]
Interest 10.50% [1],[2],[10] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[15] $ 127  
Fair value at ending balance $ 1,556 [1],[2],[10] $ 127 [7],[14],[15]
Interest 5.75% [1],[2],[10] 5.50% [7],[14],[15]
Interest 10.50% [1],[2],[10] 6.50% [7],[14],[15]
Investment, Identifier [Axis]: World 50, Inc., Professional Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 3,280  
Fair value at ending balance $ 8,821 [1],[2],[3] $ 3,280 [7],[14],[22]
Interest 4.75% [1],[2],[3] 5.25% [7],[14],[22]
Interest 9.10% [1],[2],[3] 6.30% [7],[14],[22]
Investment, Identifier [Axis]: World 50, Inc., Professional Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14],[22] $ 8,872  
Fair value at ending balance $ 2,428 [1],[2],[3] $ 8,872 [7],[14],[22]
Interest 5.25% [1],[2],[3] 4.50% [7],[14],[22]
Interest 9.60% [1],[2],[3] 5.50% [7],[14],[22]
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11],[17] $ 549  
Investment owned, balance (in shares) [2],[11],[12],[13],[17] 45,665,825  
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[30] $ 5,446  
Interest [1],[2],[17],[30] 5.25%  
Interest [1],[2],[17],[30] 8.20%  
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[17] $ 2,502  
Investment, interest rate, paid in kind [2],[17] 11.00%  
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ 2,628  
Interest [1],[2],[10] 4.75%  
Interest [1],[2],[10] 9.50%  
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[11] $ 189  
Investment owned, balance (in shares) [2],[11],[12],[13] 152.69  
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[10] $ (12)  
Interest [1],[2],[10] 4.75%  
Interest [1],[2],[10] 9.50%  
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Services: Business, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[17],[41] $ 5,162  
Interest [1],[2],[17],[41] 6.25%  
Interest [1],[2],[17],[41] 9.20%  
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ 3,262  
Interest [1],[2],[3] 5.00%  
Interest [1],[2],[3] 9.40%  
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3] $ (9)  
Interest [1],[2],[3] 5.00%  
Interest [1],[2],[3] 9.40%  
1888 Industrial Services, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance $ 1,263  
Eclipse Business Capital, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [47] 99,224  
Fair value at ending balance 144,884 $ 99,224 [47]
Hylan Datacom And Electrical, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance 12,511  
Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [47] 37,601  
Fair value at ending balance 40,088 37,601 [47]
JSC Tekers Holdings    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [47] 6,197  
Fair value at ending balance [47]   6,197
Kemmerer Operations LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance 2,746  
Security Holdings B.V.    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance 72,872  
Sierra Senior Loan Strategy JV I, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance 37,950  
Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance 30,339  
Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance 20,212  
Black Angus Steakhouses, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance 14,794  
MVC Automotive Group GmbH    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance 16,824  
MVC Private Equity Fund LP    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance 1,838  
Affiliate investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 288,069 [5] 78,599
Gross Additions 127,617 199,093
Gross Reductions (124,878) (7,106)
Amount of Realized Gain (Loss) 101 (101)
Amount of Unrealized Gain (Loss) (916) 17,584
Fair value at ending balance 289,993 288,069 [5]
Amount of Interest or Dividends Credited to Income 30,005 10,314
Affiliate investments | 1888 Industrial Services, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 1,917  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (654)  
Fair value at ending balance 1,263 0
Amount of Interest or Dividends Credited to Income (12)  
Affiliate investments | Addvantage Insurance Inc    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0 5,947
Gross Additions   0
Gross Reductions   (5,870)
Amount of Realized Gain (Loss)   (77)
Amount of Unrealized Gain (Loss)   0
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income   72
Affiliate investments | Charming Charlie, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 0  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 0
Amount of Interest or Dividends Credited to Income 35  
Affiliate investments | Eclipse Business Capital, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 99,224 0
Gross Additions 8,677 96,043
Gross Reductions (1,818) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 38,801 3,181
Fair value at ending balance 144,884 99,224
Amount of Interest or Dividends Credited to Income 12,054 3,805
Affiliate investments | Hylan Datacom And Electrical, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 12,886  
Gross Reductions 0  
Amount of Realized Gain (Loss) 101  
Amount of Unrealized Gain (Loss) (476)  
Fair value at ending balance 12,511 0
Amount of Interest or Dividends Credited to Income 762  
Affiliate investments | Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 37,601 22,624
Gross Additions 5,000 10,000
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (2,513) 4,977
Fair value at ending balance 40,088 37,601
Amount of Interest or Dividends Credited to Income 1,427 0
Affiliate investments | JSC Tekers Holdings    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 6,197 4,753
Gross Additions 0 0
Gross Reductions (6,197) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 0 1,444
Fair value at ending balance 0 6,197
Amount of Interest or Dividends Credited to Income 0 0
Affiliate investments | Kemmerer Operations LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 4,374  
Gross Reductions (1,220)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (408)  
Fair value at ending balance 2,746 0
Amount of Interest or Dividends Credited to Income 307  
Affiliate investments | Security Holdings B.V.    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 47,108 35,263
Gross Additions 0 9,873
Gross Reductions (47,108) (1,168)
Amount of Realized Gain (Loss) 0 (24)
Amount of Unrealized Gain (Loss) 0 3,164
Fair value at ending balance 0 47,108
Amount of Interest or Dividends Credited to Income 0 1,381
Affiliate investments | Sierra Senior Loan Strategy JV I, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 85,963  
Gross Reductions (35,742)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (12,271)  
Fair value at ending balance 37,950 0
Amount of Interest or Dividends Credited to Income 4,526  
Affiliate investments | Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 84,438 10,012
Gross Additions 0 69,414
Gross Reductions (32,793) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (21,306) 5,012
Fair value at ending balance 30,339 84,438
Amount of Interest or Dividends Credited to Income 9,056 4,776
Affiliate investments | Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 13,501 0
Gross Additions 8,800 13,763
Gross Reductions 0 (68)
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (2,089) (194)
Fair value at ending balance 20,212 13,501
Amount of Interest or Dividends Credited to Income 1,850 280
Control investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 22,412 [50] 25,855
Gross Additions 99,701 4,500
Gross Reductions (24,561) (4,474)
Amount of Realized Gain (Loss) (722) 0
Amount of Unrealized Gain (Loss) 9,498 (3,469)
Fair value at ending balance 106,328 22,412 [50]
Amount of Interest or Dividends Credited to Income 1,797 1,078
Control investments | JSC Tekers Holdings    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 6,197  
Gross Reductions (5,832)  
Amount of Realized Gain (Loss) 1,079  
Amount of Unrealized Gain (Loss) (1,444)  
Fair value at ending balance 0 0
Amount of Interest or Dividends Credited to Income 0  
Control investments | Security Holdings B.V.    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 78,229  
Gross Reductions (18,729)  
Amount of Realized Gain (Loss) (1,801)  
Amount of Unrealized Gain (Loss) 15,173  
Fair value at ending balance 72,872 0
Amount of Interest or Dividends Credited to Income 1,649  
Control investments | Black Angus Steakhouses, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions 15,275  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (481)  
Fair value at ending balance 14,794 0
Amount of Interest or Dividends Credited to Income 544  
Control investments | MVC Automotive Group GmbH    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 14,848 16,731
Gross Additions 0 0
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 1,976 (1,883)
Fair value at ending balance 16,824 14,848
Amount of Interest or Dividends Credited to Income 435 435
Control investments | MVC Private Equity Fund LP    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 7,564 9,124
Gross Additions 0 0
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (5,726) (1,560)
Fair value at ending balance 1,838 7,564
Amount of Interest or Dividends Credited to Income $ (831) $ 643
[1] Debt investment includes interest rate floor feature.
[2] The fair value of the investment was determined using significant unobservable inputs.
[3] The interest rate on these loans is subject to 1 Month LIBOR, which as of December 31, 2022 was 4.39157%.
[4] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 25.7% of total investments at fair value as of December 31, 2021. 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).
[5] All of the investment is or will be encumbered as security for the Company’s senior secured credit facility with ING Capital LLC.
[6] 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.
[7] The fair value of the investment was determined using significant unobservable inputs.
[8] 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.
[9] Non-accrual investment.
[10] The interest rate on these loans is subject to 3 Month LIBOR, which as of December 31, 2022 was 4.76729%.
[11] Investment is non-income producing.
[12] All debt investments are income producing, unless otherwise noted. Barings BDC, Inc’s (the “Company”) external investment adviser, Barings LLC (“Barings” or the “Adviser”), determines in good faith whether the Company’s investments were valued at fair value in accordance with a valuation policy and processes established by the Adviser, which have been approved by the Company’s board of directors (the “Board”), and the Investment Company Act of 1940, as amended (the “1940 Act”). In addition, all debt investments are variable rate investments unless otherwise noted. Index-based floating interest rates are generally subject to a contractual minimum interest rate. Variable rate loans to the Company’s portfolio companies bear interest at a rate that may be determined by reference to the London Interbank Offered Rate (“LIBOR”), the Secured Overnight Financing Rate (“SOFR”), the Euro Interbank Offered Rate (“EURIBOR”), the Bank Bill Swap Bid Rate (“BBSY”), the Stockholm Interbank Offered Rate (“STIBOR”), the Canadian Dollar Offered Rate (“CDOR”), the Sterling Overnight Index Average (“SONIA”), the Swiss Average Rate Overnight (“SARON”), the Norwegian Interbank Offered Rate (“NIBOR”), the Bank Bill Market rate (“BKBM”) or an alternate base rate (commonly based on the Federal Funds Rate or the Prime Rate), at the borrower’s option, which reset annually, semi-annually, quarterly or monthly. For each such loan, the Company has provided the interest rate in effect on the date presented. SOFR based contracts may include a credit spread adjustment that is charged in addition to the base rate and the stated spread. The borrower may also elect to have multiple interest reset periods for each loan.
[13] All of the Company’s portfolio company investments (including joint venture investments), which as of December 31, 2022 represented 205.4% of the Company’s net assets, are subject to legal restrictions on sales. The acquisition date represents the date of the Company's initial investment in the relevant portfolio company.
[14] Debt investment includes interest rate floor feature.
[15] The interest rate on these loans is subject to 3 Month LIBOR, which as of December 31, 2021 was 0.20913%.
[16] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2022 was 4.58745%.
[17] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 25.9% of total investments at fair value as of December 31, 2022. 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).
[18] All debt investments are income producing, unless otherwise noted. Eclipse Business Capital, LLC, Ferrellgas L.P., Kano Laboratories LLC, Thompson Rivers LLC and Waccamaw River LLC equity investments are income producing. All other equity and any equity-linked investments are non-income producing. The Board determined in good faith that all investments were valued at fair value in accordance with the Company’s valuation policies and procedures and the 1940 Act, based on, among other things, the input of the Company’s external investment adviser, Barings, the Company’s Audit Committee and independent valuation firms that have been engaged to assist in the valuation of the Company’s middle-market investments. In addition, all debt investments are variable rate investments unless otherwise noted. Index-based floating interest rates are generally subject to a contractual minimum interest rate. A majority of the variable rate loans in the Company’s investment portfolio bear interest at a rate that may be determined by reference to LIBOR, EURIBOR, GBP LIBOR, BBSY, STIBOR, CDOR, SOFR, SONIA or an alternate Base Rate (commonly based on the Federal Funds Rate or the Prime Rate), which typically reset semi-annually, quarterly, or monthly at the borrower’s option. The borrower may also elect to have multiple interest reset periods for each loan.
[19] All of the Company’s portfolio company investments (including joint venture investments), which as of December 31, 2021 represented 242.7% of the Company’s net assets, are subject to legal restrictions on sales. The acquisition date represents the date of the Company’s initial investment in the relevant portfolio company.
[20] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2022 was 2.13200%.
[21] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2022 was 3.01500%.
[22] The interest rate on these loans is subject to 1 Month LIBOR, which as of December 31, 2021 was 0.10125%.
[23] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2022 was 4.78131%.
[24] The interest rate on these loans is subject to 6 Month LIBOR, which as of December 31, 2022 was 5.13886%.
[25] The interest rate on these loans is subject to 6 Month LIBOR, which as of December 31, 2021 was 0.33875%.
[26] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2022 was 2.69300%.
[27] The interest rate on these loans is subject to 1 Month SOFR, which as of December 31, 2022 was 4.35806%.
[28] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2021 was -0.57200%.
[29] The interest rate on these loans is subject to 3 Month GBP LIBOR, which as of December 31, 2021 was 0.26225%.
[30] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2022 was 3.75470%.
[31] The interest rate on these loans is subject to 1 Month EURIBOR, which as of December 31, 2022 was 1.88400%.
[32] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2021 was 0.49870%.
[33] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2022 was 4.09490%.
[34] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2021 was 0.33830%.
[35] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2021 was -0.54600%.
[36] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2021 was 0.06770%.
[37] The interest rate on these loans is subject to 6 Month BBSY, which as of December 31, 2022 was 3.76500%.
[38] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2021 was -0.00050%.
[39] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2022 was 2.70100%.
[40] The interest rate on these loans is subject to 6 Month GBP LIBOR, which as of December 31, 2021 was 0.47363%.
[41] The interest rate on these loans is subject to 1 Month SONIA, which as of December 31, 2022 was 3.43570%.
[42] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2021 was 0.09125%.
[43] The interest rate on these loans is subject to 3 Month CDOR, which as of December 31, 2021 was 0.51750%.
[44] The interest rate on these loans is subject to 3 Month CDOR, which as of December 31, 2022 was 4.93500%.
[45] Non-accrual investment.
[46] 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.
[47] 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, 2021 were as follows:
December 31, 2020 ValueGross Additions
(b)
Gross Reductions (c)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31, 2021 ValueAmount of Interest or Dividends Credited to Income(d)
Portfolio Company(6)Type of Investment(a)
Advantage Insurance, Inc.(e)
Preferred Stock (587,001 shares)
$5,947 $— $(5,870)$(77)$— $— $72 
5,947 — (5,870)(77)— — 72 
Eclipse Business Capital, LLC (e)
Second Lien Senior Secured Term Loan (7.5% Cash)
— 4,502 — — 236 4,738 170 
Revolver (LIBOR + 7.25%)
— 1,691 — — 127 1,818 53 
LLC units (89,447,396 units)
— 89,850 — — 2,818 92,668 3,582 
— 96,043 — — 3,181 99,224 3,805 
Jocassee Partners LLC
9.1% Member Interest
22,624 10,000 — — 4,977 37,601 — 
22,624 10,000 — — 4,977 37,601 — 
JSC Tekers Holdings(e)
Preferred Stock (9,159,085 shares)
4,753 — — — 1,444 6,197 — 
Common Stock (3,201 shares)
— — — — — — — 
4,753 — — — 1,444 6,197 — 
Security Holdings B.V(e)
Bridge Loan (5.0% PIK 5/31/2021)
5,188 263 — — — 5,451 276 
Senior Subordinated Loan (3.1% PIK)
8,746 779 — — — 9,525 285 
Senior Unsecured Term Loan (9.0% PIK)
— 8,831 (1,168)(24)(332)7,307 820 
Common Equity Interest21,329 — — — 3,496 24,825 — 
35,263 9,873 (1,168)(24)3,164 47,108 1,381 
Thompson Rivers LLC
15.90% Member Interest
10,012 69,414 — — 5,012 84,438 4,776 
10,012 69,414 — — 5,012 84,438 4,776 
Waccamaw River LLC
20% Member Interest
— 13,763 (68)— (194)13,501 280 
— 13,763 (68)— (194)13,501 280 
Total Affiliate Investments$78,599 $199,093 $(7,106)$(101)$17,584 $288,069 $10,314 
(a)     Eclipse Business Capital, LLC, Thompson Rivers LLC and Waccamaw River LLC equity investments are income producing. All other equity and any equity-linked investments are non-income producing.
(b) Gross additions include increases in the cost basis of investments resulting from new investments and follow-on investments.
(c)    Gross reductions include decreases in the total cost basis of investments resulting from principal repayments or sales.
(d) 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.
(e) The fair value of the investment was determined using significant unobservable inputs.
[48] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2022 was 3.26470%.
[49] The interest rate on these loans is subject to 3 Month BKBM, which as of December 31, 2022 was 4.53000%.
[50] 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, 2021 in which the portfolio company is deemed to be a "Control Investment" of the Company were as follows:
December 31, 2020 ValueGross Additions
(b)
Gross Reductions (c)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31, 2021 ValueAmount of Interest or Dividends Credited to Income(d)
Portfolio CompanyType of Investment(a)
MVC Automotive Group GmbH(e)
Common Equity Interest$9,582 $— $— $— $(1,883)$7,699 $— 
Bridge Loan (6.0% Cash 12/31/2021)
7,149 — — — — 7,149 435 
16,731 — — — (1,883)14,848 435 
MVC Private Equity Fund LPLimited Partnership Interest8,899 — — — (1,523)7,376 — 
General Partnership Interest225 — — (37)188 643 
9,124 — — — (1,560)7,564 643 
Waccamaw River LLC
50% Member Interest
— 4,500 (4,474)— (26)— — 
Total Control Investments$25,855 $4,500 $(4,474)$ $(3,469)$22,412 $1,078 
(a)     Equity and equity-linked investments are non-income producing, unless otherwise noted.
(b) Gross additions include increases in the cost basis of investments resulting from new investments and follow-on investments.
(c)     Gross reductions include decreases in the total cost basis of investments resulting from principal repayments or sales.
(d)    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.
(e) The fair value of the investment was determined using significant unobservable inputs.
[51] The interest rate on these loans is subject to Prime, which as of December 31, 2022 was 7.50000%.
[52] The interest rate on these loans is subject to 1 Month NIBOR, which as of December 31, 2022 was 3.04000%.
[53] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2021 was 0.01500%.
[54] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2021 was 0.19947%.
[55] Fair value as a percentage of net assets.
[56] The interest rate on these loans is subject to 3 Month SARON, which as of December 31, 2022 was 0.94212%.
[57] The interest rate on these loans is subject to 1 Month CDOR, which as of December 31, 2022 was 4.73750%.
[58] In 2017, MVC received $5.7 million of 9.5% second lien callable notes due in 2025, in lieu of an escrow to satisfy any indemnification claims associated with MVC’s sale of its equity investment in U.S. Gas. Effective January 1, 2018, the cost basis of the U.S. Gas second lien loan was decreased by approximately $3.0 million due to a working capital adjustment. This loan is still subject to indemnification adjustments.