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Unaudited Consolidated Schedule of Investments - Schedule Of Investments (Parenthetical) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1] $ 1,800,594  
Fair value at ending balance $ 2,332,492 [2] $ 1,800,594 [1]
Interest [3],[4],[5] 7.80%  
Investment, interest rate, paid in kind [6] 8.30%  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[7],[8] $ 0  
Interest [3],[4],[5],[7],[8] 6.00%  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[7],[8] $ 1,171  
Interest [3],[4],[5],[7],[8] 8.70%  
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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 0  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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
Amount of Interest or Dividends Credited to Income $ 0  
Debt instrument, basis spread on variable rate 5.00%  
Interest 6.00%  
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 1,423  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (252)  
Fair value at ending balance 1,171 0
Amount of Interest or Dividends Credited to Income $ (12)  
Debt instrument, basis spread on variable rate 5.00%  
Interest 8.70%  
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 [12],[13],[14] $ 16,434  
Fair value at ending balance [12],[13],[14]   $ 16,434
Interest [12],[13],[14]   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 beginning balance    
Fair value at ending balance [3],[4],[15] $ 16,296  
Interest [3],[4],[15] 8.20%  
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 [12],[14],[16] $ 5,106  
Fair value at ending balance $ 4,620 [3],[4],[5],[6] $ 5,106 [12],[14],[16]
Interest 10.90% [3],[4],[5],[6] 8.80% [12],[14],[16]
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 [13] $ 689  
Fair value at ending balance $ 787 [4],[9] $ 689 [13]
Investment owned, balance (in shares) 348.68 [4],[9],[10],[11] 348.68 [13],[17],[18]
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 [12],[13],[14] $ 6,460  
Fair value at ending balance $ 6,350 [3],[4],[5] $ 6,460 [12],[13],[14]
Interest 11.20% [3],[4],[5] 8.50% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [6],[7] $ 3,482  
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 beginning balance    
Fair value at ending balance [6],[7] 1,552  
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 [13] 1,854  
Fair value at ending balance [13]   $ 1,854
Interest [13]   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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 1,701  
Interest [3],[4],[6],[19] 6.10%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[20] $ 1,962  
Interest [3],[4],[6],[20] 9.90%  
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 [12],[13],[14] $ 20,000  
Fair value at ending balance $ 19,730 [3],[4],[5] $ 20,000 [12],[13],[14]
Interest 10.60% [3],[4],[5] 8.00% [12],[13],[14]
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]    
Fair value at beginning balance    
Fair value at ending balance [4],[9] $ 539  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[21] $ 21,447  
Interest [3],[4],[21] 8.00%  
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 [12],[13],[22] $ 8,464  
Fair value at ending balance $ 8,363 [3],[4] $ 8,464 [12],[13],[22]
Interest 8.40% [3],[4] 6.30% [12],[13],[22]
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 [12],[14] $ 4,458  
Fair value at ending balance $ 4,223 [3],[5] $ 4,458 [12],[14]
Interest 6.40% [3],[5] 4.30% [12],[14]
Investment, interest rate, paid in kind 0.30% [3],[5] 0.25% [12],[14]
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 [12],[14] $ 693  
Fair value at ending balance $ 660 [3],[5] $ 693 [12],[14]
Interest 7.60% [3],[5] 5.50% [12],[14]
Investment, interest rate, paid in kind 1.00% [3],[5] 1.00% [12],[14]
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 $ 6,012 $ 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 beginning balance    
Fair value at ending balance [4],[9] $ 5,302  
Investment owned, balance (in shares) [4],[9],[10],[11] 5,000  
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 [12],[13],[14] $ 7,429  
Fair value at ending balance $ 7,467 [3],[4],[5] $ 7,429 [12],[13],[14]
Interest 7.80% [3],[4],[5] 6.00% [12],[13],[14]
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 [12],[13],[14],[16] $ 1,147  
Fair value at ending balance [12],[13],[14],[16]   $ 1,147
Interest [12],[13],[14],[16]   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 beginning balance    
Fair value at ending balance [3],[4],[6],[23] $ 2,425  
Interest [3],[4],[6],[23] 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 beginning balance    
Fair value at ending balance [4],[9] $ 440  
Investment owned, balance (in shares) [4],[9],[10],[11] 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 [12],[13],[24] $ 24,016  
Fair value at ending balance $ 12,153 [3],[4],[5] $ 24,016 [12],[13],[24]
Interest 7.70% [3],[4],[5] 5.50% [12],[13],[24]
Investment, interest rate, paid in kind [12],[13],[24]   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 beginning balance    
Fair value at ending balance [3],[4],[5] $ (29)  
Interest [3],[4],[5] 7.70%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[25] $ 6,899  
Interest [3],[4],[6],[25] 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 [13] 280  
Fair value at ending balance $ 791 [4],[9] $ 280 [13]
Investment owned, balance (in shares) 8,717.76 [4],[9],[10],[11] 8,717.76 [13],[17],[18]
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 [13] $ 72  
Fair value at ending balance $ 204 [4],[9] $ 72 [13]
Investment owned, balance (in shares) 2,248.46 [4],[9],[10],[11] 2,248.46 [13],[17],[18]
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 [13] $ 9  
Fair value at ending balance $ 0 [4],[9] $ 9 [13]
Investment owned, balance (in shares) 8,717.76 [4],[9],[10],[11] 8,717.76 [13],[17],[18]
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 [13] $ 2  
Fair value at ending balance $ 0 [4],[9] $ 2 [13]
Investment owned, balance (in shares) 2,248.46 [4],[9],[10],[11] 2,248.46 [13],[17],[18]
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 [12],[13],[14] $ 9,303  
Fair value at ending balance [12],[13],[14]   $ 9,303
Interest [12],[13],[14]   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 $ 5,395 $ 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 [12],[13],[14] $ 11,280  
Fair value at ending balance $ 12,714 [3],[4],[5] $ 11,280 [12],[13],[14]
Interest 8.40% [3],[4],[5] 6.30% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[7],[21] $ 22,765  
Interest [3],[4],[7],[21] 8.50%  
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 [12],[13],[14] $ 17,975  
Fair value at ending balance $ 16,704 [3],[4],[26] $ 17,975 [12],[13],[14]
Interest 11.70% [3],[4],[26] 9.80% [12],[13],[14]
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Class B Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[6],[9] $ 1,040  
Investment owned, balance (in shares) [4],[6],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[6] $ 4,443  
Interest [4],[6] 2.00%  
Investment, interest rate, paid in kind [4],[6] 9.00%  
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Warrant    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[6],[9] $ 0  
Investment owned, balance (in shares) [4],[6],[10],[11] 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 [12],[13],[22] $ 3,955  
Fair value at ending balance $ 2,221 [3],[4],[26] $ 3,955 [12],[13],[22]
Interest 8.10% [3],[4],[26] 6.30% [12],[13],[22]
Investment, Identifier [Axis]: Amtech LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[13],[14] $ (14)  
Fair value at ending balance $ 127 [3],[4],[26] $ (14) [12],[13],[14]
Interest 8.00% [3],[4],[26] 6.30% [12],[13],[14]
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 [16] $ 16,051  
Fair value at ending balance $ 15,275 $ 16,051 [16]
Interest 10.00% 10.00% [16]
Investment, interest rate, paid in kind 5.00% 5.00% [16]
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    
Fair value at ending balance [3],[4],[6],[19] $ 2,135  
Interest [3],[4],[6],[19] 6.50%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 662  
Interest [3],[4],[6],[19] 6.50%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 5,134  
Interest [3],[4],[6],[19] 6.50%  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[6] $ 996  
Interest [3],[4],[5],[6] 9.80%  
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ (8)  
Interest [3],[4],[6],[19] 6.50%  
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 [12],[13],[16],[27] $ 2,576  
Fair value at ending balance [12],[13],[16],[27]   $ 2,576
Interest [12],[13],[16],[27]   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 [12],[13],[22] 13,284  
Fair value at ending balance $ 11,437 [3],[4],[26] $ 13,284 [12],[13],[22]
Interest 10.40% [3],[4],[26] 6.30% [12],[13],[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 [12],[13],[16],[28] $ 1,970  
Fair value at ending balance $ 1,627 [3],[4],[6] $ 1,970 [12],[13],[16],[28]
Interest 8.40% [3],[4],[6] 6.80% [12],[13],[16],[28]
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 [13],[16] $ 278  
Fair value at ending balance $ 243 [4],[6] $ 278 [13],[16]
Investment, interest rate, paid in kind 8.00% [4],[6] 8.00% [13],[16]
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 beginning balance    
Fair value at ending balance [6],[7] $ 6,498  
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 [13],[16] 11  
Fair value at ending balance [13],[16]   $ 11
Investment owned, balance (in shares) [13],[16],[17],[18]   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 [12],[13],[16],[27] 4,552  
Fair value at ending balance [12],[13],[16],[27]   $ 4,552
Interest [12],[13],[16],[27]   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 [13],[16] 111  
Fair value at ending balance [13],[16]   $ 111
Investment owned, balance (in shares) [13],[16],[17],[18]   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 beginning balance    
Fair value at ending balance [4],[6],[9] $ 13  
Investment owned, balance (in shares) [4],[6] 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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 4,560  
Interest [3],[4],[6],[19] 7.00%  
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 beginning balance    
Fair value at ending balance [4],[6],[9] $ 101  
Investment owned, balance (in shares) [4],[6] 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 [12],[13],[16],[29] $ 3,823  
Fair value at ending balance $ 3,142 [3],[4],[6],[30] $ 3,823 [12],[13],[16],[29]
Interest 7.20% [3],[4],[6],[30] 5.50% [12],[13],[16],[29]
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 [12],[13],[16],[29] $ 5,766  
Fair value at ending balance $ 4,871 [3],[4],[6],[30] $ 5,766 [12],[13],[16],[29]
Interest 6.90% [3],[4],[6],[30] 6.10% [12],[13],[16],[29]
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 [12],[13],[16],[29] $ (5)  
Fair value at ending balance $ (56) [3],[4],[6],[30] $ (5) [12],[13],[16],[29]
Interest 6.90% [3],[4],[6],[30] 6.10% [12],[13],[16],[29]
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 [12],[13],[16],[29] $ 1,465  
Fair value at ending balance $ 1,285 [3],[4],[6],[30] $ 1,465 [12],[13],[16],[29]
Investment, interest rate, paid in kind 10.50% [3],[4],[6],[30] 10.50% [12],[13],[16],[29]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 2,707  
Interest [3],[4],[6],[19] 5.80%  
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 [12],[13],[14] $ 9,248  
Fair value at ending balance $ 9,133 [3],[4],[5] $ 9,248 [12],[13],[14]
Interest 8.40% [3],[4],[5] 4.80% [12],[13],[14]
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 [12],[13],[16],[27] $ 8,255  
Fair value at ending balance $ 5,635 [3],[4],[6],[25] $ 8,255 [12],[13],[16],[27]
Interest 5.50% [3],[4],[6],[25] 6.00% [12],[13],[16],[27]
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 beginning balance    
Fair value at ending balance [4],[6],[9] $ 1  
Investment owned, balance (in shares) [4],[6],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[6] $ 46  
Investment, interest rate, paid in kind [4],[6] 10.00%  
Investment owned, balance (in shares) [4],[6],[10],[11] 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 [12],[13],[16],[31] $ 2,682  
Fair value at ending balance $ 126 [3],[4],[5],[6] $ 2,682 [12],[13],[16],[31]
Interest 9.40% [3],[4],[5],[6] 5.80% [12],[13],[16],[31]
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 [12],[13],[14],[16] $ 672  
Fair value at ending balance $ 1,418 [3],[4],[6],[32] $ 672 [12],[13],[14],[16]
Interest 7.90% [3],[4],[6],[32] 5.80% [12],[13],[14],[16]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 1,416  
Interest [3],[4],[6],[19] 6.90%  
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 beginning balance    
Fair value at ending balance [4],[6] $ 46  
Investment, interest rate, paid in kind [4],[6] 10.00%  
Investment owned, balance (in shares) [4],[6],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[6] $ 442  
Investment, interest rate, paid in kind [4],[6] 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 [12],[13],[14] $ 3,939  
Fair value at ending balance $ 3,938 [3],[4],[26] $ 3,939 [12],[13],[14]
Interest 7.60% [3],[4],[26] 5.80% [12],[13],[14]
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 [12],[13],[16],[31] $ 5,535  
Fair value at ending balance $ 1,753 [3],[4],[6],[32] $ 5,535 [12],[13],[16],[31]
Interest 8.20% [3],[4],[6],[32] 5.80% [12],[13],[16],[31]
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 [12],[13],[16],[33] $ 1,439  
Fair value at ending balance $ 1,210 [3],[4],[6],[25] $ 1,439 [12],[13],[16],[33]
Interest 9.10% [3],[4],[6],[25] 6.30% [12],[13],[16],[33]
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 [12],[13],[16],[29] $ 820  
Fair value at ending balance $ 660 [3],[4],[6],[32] $ 820 [12],[13],[16],[29]
Interest 9.40% [3],[4],[6],[32] 6.30% [12],[13],[16],[29]
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 [12],[13],[16],[34] $ 6,158  
Fair value at ending balance $ 2,195 [3],[4],[6],[35] $ 6,158 [12],[13],[16],[34]
Interest 9.10% [3],[4],[6],[35] 6.00% [12],[13],[16],[34]
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 beginning balance    
Fair value at ending balance [3],[4],[7],[26] $ 27,202  
Interest [3],[4],[7],[26] 5.10%  
Investment, interest rate, paid in kind [3],[4],[7],[26] 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 [13] $ 192  
Fair value at ending balance $ 143 [4],[9] $ 192 [13]
Investment owned, balance (in shares) 192,307.7 [10],[11] 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 [13],[14] $ 4,494  
Fair value at ending balance $ 4,483 [3],[4],[5] $ 4,494 [13],[14]
Interest 8.90% [3],[4],[5] 6.30% [13],[14]
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [13],[14] $ (10)  
Fair value at ending balance $ (8) [3],[4],[5] $ (10) [13],[14]
Interest 8.90% [3],[4],[5] 6.30% [13],[14]
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 [13] $ 1,234  
Fair value at ending balance $ 1,329 [4] $ 1,234 [13]
Investment, interest rate, paid in kind 12.00% [4] 12.00% [13]
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 [12],[13],[22] $ 14,626  
Fair value at ending balance [12],[13],[22]   $ 14,626
Interest [12],[13],[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 beginning balance    
Fair value at ending balance [3],[4],[19] $ 8,756  
Interest [3],[4],[19] 10.70%  
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    
Fair value at ending balance [3],[4],[6],[19] $ 5,439  
Interest [3],[4],[6],[19] 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 [12],[13],[16],[27] $ 6,244  
Fair value at ending balance [12],[13],[16],[27]   $ 6,244
Interest [12],[13],[16],[27]   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 [12],[13],[16],[36] 1,286  
Fair value at ending balance $ 995 [3],[4],[6],[37] $ 1,286 [12],[13],[16],[36]
Interest 7.20% [3],[4],[6],[37] 5.30% [12],[13],[16],[36]
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 [12],[13],[14] $ 2,327  
Fair value at ending balance $ 2,493 [3],[4],[5] $ 2,327 [12],[13],[14]
Interest 8.20% [3],[4],[5] 5.30% [12],[13],[14]
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 [12],[13],[16],[27] $ 7,741  
Fair value at ending balance $ 6,659 [3],[4],[6],[25] $ 7,741 [12],[13],[16],[27]
Interest 6.50% [3],[4],[6],[25] 6.50% [12],[13],[16],[27]
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 [12],[13],[16],[38] $ 878  
Fair value at ending balance [12],[13],[16],[38]   $ 878
Interest [12],[13],[16],[38]   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 beginning balance    
Fair value at ending balance [3],[4],[6],[39] $ 2,491  
Interest [3],[4],[6],[39] 8.70%  
Investment, Identifier [Axis]: BigHand UK 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 beginning balance    
Fair value at ending balance [3],[4],[6],[32] $ 737  
Interest [3],[4],[6],[32] 7.70%  
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 $ 360  
Debt instrument, basis spread on variable rate 9.10%  
Interest 12.20%  
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) 1,204  
Fair value at ending balance 10,832 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 beginning balance    
Fair value at ending balance [3],[4],[7],[26] $ 5,647  
Interest [3],[4],[7],[26] 12.20%  
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 beginning balance    
Fair value at ending balance [4],[7],[8] $ 10,832  
Investment, interest rate, paid in kind [4],[7],[8] 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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 0  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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 [13],[40] $ 10,000  
Fair value at ending balance [13],[40]   $ 10,000
Interest [13],[40]   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 [13],[40] 864  
Fair value at ending balance [13],[40]   $ 864
Investment owned, balance (in shares) [13],[17],[18],[40]   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 [12],[13],[14] 4,756  
Fair value at ending balance $ 1,823 [3],[4],[5] $ 4,756 [12],[13],[14]
Interest 7.50% [3],[4],[5] 6.00% [12],[13],[14]
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 beginning balance    
Fair value at ending balance $ 28,295  
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 beginning balance    
Fair value at ending balance [4] $ 13,938  
Investment, interest rate, paid in kind [4] 7.00%  
Investment owned, balance (in shares) [4],[10],[11] 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 [12],[13],[14] $ 12,683  
Fair value at ending balance $ 4,747 [3],[4],[5] $ 12,683 [12],[13],[14]
Interest 9.10% [3],[4],[5] 6.80% [12],[13],[14]
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 [13] $ 1,135  
Fair value at ending balance $ 1,246 [4],[9] $ 1,135 [13]
Investment owned, balance (in shares) 1,107,492.71 [4],[10],[11] 1,107,492.71 [13],[17],[18]
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[13],[14] $ (13)  
Fair value at ending balance $ (9) [3],[4],[5] $ (13) [12],[13],[14]
Interest 9.10% [3],[4],[5] 6.80% [12],[13],[14]
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 [13] $ 5,005  
Fair value at ending balance $ 4,687 [4] $ 5,005 [13]
Interest 8.00% [4] 8.00% [13]
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 [12],[13],[16],[27] $ 1,862  
Fair value at ending balance $ 1,806 [3],[4],[6],[19] $ 1,862 [12],[13],[16],[27]
Interest 5.10% [3],[4],[6],[19] 5.30% [12],[13],[16],[27]
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 $ 741 $ 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 [12],[13],[16],[29] $ 15,406  
Fair value at ending balance $ 12,452 [3],[4],[6],[30] $ 15,406 [12],[13],[16],[29]
Interest 9.20% [3],[4],[6],[30] 7.00% [12],[13],[16],[29]
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 [12],[13],[16],[29] $ (5)  
Fair value at ending balance [12],[13],[16],[29]   $ (5)
Interest [12],[13],[16],[29]   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 beginning balance    
Fair value at ending balance [3],[4],[7],[26] $ 2,612  
Interest [3],[4],[7],[26] 7.10%  
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 [12],[13],[22] $ 6,634  
Fair value at ending balance $ 6,281 [3],[4],[5] $ 6,634 [12],[13],[22]
Interest 8.90% [3],[4],[5] 6.30% [12],[13],[22]
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 beginning balance    
Fair value at ending balance [4],[9] $ 410  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[21] $ 4,364  
Interest [3],[4],[21] 12.20%  
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 [12],[13],[14] $ 8,876  
Fair value at ending balance [12],[13],[14]   $ 8,876
Interest [12],[13],[14]   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 beginning balance    
Fair value at ending balance [3],[4],[5] $ 4,921  
Interest [3],[4],[5] 9.90%  
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 beginning balance    
Fair value at ending balance [3],[4],[5] $ 1,353  
Interest [3],[4],[5] 8.70%  
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 $ (19) [3],[4],[5] $ (19)
Interest 9.90% [3],[4],[5] 7.30%
Investment, Identifier [Axis]: CGI Parent, LLC, 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    
Fair value at ending balance [3],[4],[5] $ 10,581  
Interest [3],[4],[5] 7.80%  
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 beginning balance    
Fair value at ending balance [4],[9] $ 955  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[5] $ (26)  
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 [12],[13],[14] 19,106  
Fair value at ending balance [12],[13],[14]   $ 19,106
Interest [12],[13],[14]   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 beginning balance    
Fair value at ending balance [3],[4],[39] $ 16,989  
Interest [3],[4],[39] 7.10%  
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., Internet & Direct Marketing, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[41] $ 1,525  
Interest [3],[4],[41] 8.50%  
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 [12],[13],[14] $ 3,999  
Fair value at ending balance $ 3,969 [3],[4],[5] $ 3,999 [12],[13],[14]
Interest 6.80% [3],[4],[5] 6.00% [12],[13],[14]
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 [13] $ 227  
Fair value at ending balance $ 159 [4] $ 227 [13]
Investment owned, balance (in shares) 8,782 [4],[10],[11] 8,782 [13],[17],[18]
Investment, Identifier [Axis]: CPI International, Inc., Aerospace & Defense, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[7],[26] $ 8,318  
Interest [3],[4],[7],[26] 10.40%  
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 [12],[13],[16],[38] $ 1,301  
Fair value at ending balance $ 1,087 [3],[4],[6],[42] $ 1,301 [12],[13],[16],[38]
Interest 7.40% [3],[4],[6],[42] 5.50% [12],[13],[16],[38]
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 beginning balance    
Fair value at ending balance [3],[7],[26] $ 4,535  
Interest [3],[7],[26] 7.40%  
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 [12],[13],[16],[27] $ 788  
Fair value at ending balance [12],[13],[16],[27]   $ 788
Interest [12],[13],[16],[27]   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 [12],[13],[16],[27] 5,766  
Fair value at ending balance $ 816 [3],[4],[6],[19] $ 5,766 [12],[13],[16],[27]
Interest 5.50% [3],[4],[6],[19] 5.50% [12],[13],[16],[27]
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 [12],[13],[16],[43] $ 3,298  
Fair value at ending balance $ 1,119 [3],[4],[6],[39] $ 3,298 [12],[13],[16],[43]
Interest 9.10% [3],[4],[6],[39] 5.50% [12],[13],[16],[43]
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 [12],[13],[14] $ 2,774  
Fair value at ending balance [12],[13],[14]   $ 2,774
Interest [12],[13],[14]   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 [13] 112  
Fair value at ending balance $ 102 [4],[9] $ 112 [13]
Investment owned, balance (in shares) 161,290.32 [4],[10],[11] 161,290.32 [13],[17],[18]
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    
Fair value at ending balance [3],[4],[26] $ 2,722  
Interest [3],[4],[26] 8.50%  
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 [12],[13],[22] $ 6,913  
Fair value at ending balance $ 6,549 [3],[4],[5] $ 6,913 [12],[13],[22]
Interest 10.20% [3],[4],[5] 6.00% [12],[13],[22]
Investment, Identifier [Axis]: Cadent, LLC (f/k/a Cross MediaWorks), Media & Entertainment, First Lien Senior Secured Term Loan1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[5] $ 11,082  
Interest [3],[4],[5] 9.00%  
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 beginning balance    
Fair value at ending balance [4],[6],[9] $ 364  
Investment owned, balance (in shares) [4],[6],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[6],[9] $ 0  
Investment owned, balance (in shares) [4],[6],[10],[11] 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 [12],[13],[16],[44] $ 1,625  
Fair value at ending balance $ 1,476 [3],[4],[6],[45] $ 1,625 [12],[13],[16],[44]
Interest 9.70% [3],[4],[6],[45] 7.50% [12],[13],[16],[44]
Investment, interest rate, paid in kind 0.50%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[39] $ 4,263  
Interest [3],[4],[6],[39] 10.10%  
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[6],[9] $ 658  
Investment owned, balance (in shares) [4],[6],[10],[11] 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 $ 1,866 [9] $ 3,084
Interest 8.50%  
Investment owned, balance (in shares) 94,155 [10],[11] 94,155 [17],[18]
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 5,203 $ 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 [12],[13],[16],[27] 807  
Fair value at ending balance $ 1,805 [3],[4],[6],[19] $ 807 [12],[13],[16],[27]
Interest 5.60% [3],[4],[6],[19] 5.30% [12],[13],[16],[27]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 1,119  
Interest [3],[4],[6],[19] 5.50%  
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 [12],[13],[16],[33] $ 4,355  
Fair value at ending balance [12],[13],[16],[33]   $ 4,355
Interest [12],[13],[16],[33]   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
Amount of Interest or Dividends Credited to Income $ 0  
Debt instrument, basis spread on variable rate 12.00%  
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
Amount of Interest or Dividends Credited to Income $ 0  
Debt instrument, basis spread on variable rate 5.00%  
Interest 8.70%  
Investment, Identifier [Axis]: Charming Charlie LLC, Retail, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[7],[8],[9] $ 0  
Investment owned, balance (in shares) [4],[7],[8],[9],[10],[11] 34,923,249  
Investment, Identifier [Axis]: Charming Charlie LLC, Retail, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[7],[8] $ 0  
Interest [4],[7],[8] 20.00%  
Investment, Identifier [Axis]: Charming Charlie LLC, Retail, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [7],[8] $ 0  
Interest [7],[8] 10.40%  
Investment, Identifier [Axis]: Charming Charlie LLC, Retail, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[5],[7],[8] $ 0  
Interest [3],[4],[5],[7],[8] 15.70%  
Investment, Identifier [Axis]: Charming Charlie LLC, Retail, First Lien Senior Secured Term Loan 4    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[5],[7],[8] $ 0  
Interest [3],[4],[5],[7],[8] 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 [16] $ 2,128  
Fair value at ending balance [16]   $ 2,128
Interest [16]   7.00%
Investment, interest rate, paid in kind [16]   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 [12],[16],[24] 1,054  
Fair value at ending balance [12],[16],[24]   $ 1,054
Interest [12],[16],[24]   9.30%
Investment, Identifier [Axis]: Cineworld Group PLC, Leisure Products, Super Senior Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [6] $ 2,252  
Interest [6] 7.00%  
Investment, Identifier [Axis]: Cineworld Group PLC, Leisure Products, Super Senior Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[6],[23] $ 1,061  
Interest [3],[6],[23] 10.10%  
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 [16] $ 244  
Fair value at ending balance $ 41 [6],[9] $ 244 [16]
Investment owned, balance (in shares) 553,375 [6],[10],[11] 553,375 [16],[17],[18]
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 [12],[13],[14] $ 12,448  
Fair value at ending balance [12],[13],[14]   $ 12,448
Interest [12],[13],[14]   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 beginning balance    
Fair value at ending balance [3],[4],[23] $ 6,189  
Interest [3],[4],[23] 9.90%  
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 beginning balance    
Fair value at ending balance [3],[4],[23] $ 459  
Interest [3],[4],[23] 9.90%  
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 [13] $ 1,643  
Fair value at ending balance $ 10,189 [4],[9] $ 1,643 [13]
Investment owned, balance (in shares) 547,591 [4],[10],[11] 547,591 [13],[17],[18]
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 [13] $ 15,966  
Fair value at ending balance [13]   $ 15,966
Investment, interest rate, paid in kind [13]   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 beginning balance    
Fair value at ending balance [4] $ 4,678  
Investment, interest rate, paid in kind [4] 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 beginning balance    
Fair value at ending balance [4] $ 11,830  
Interest [4] 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 beginning balance    
Fair value at ending balance [3],[4],[5],[6] $ 1,267  
Interest [3],[4],[5],[6] 9.90%  
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 [12],[13],[14],[16] $ 4,196  
Fair value at ending balance [12],[13],[14],[16]   $ 4,196
Interest [12],[13],[14],[16]   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 [12],[13],[22] 13,658  
Fair value at ending balance [12],[13],[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 [13] 101  
Fair value at ending balance [13]   $ 101
Investment owned, balance (in shares) [13],[17],[18]   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 beginning balance    
Fair value at ending balance [4],[9] $ 201  
Investment owned, balance (in shares) [10],[11] 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 [13] $ 186  
Fair value at ending balance [13]   $ 186
Investment owned, balance (in shares) [13],[17],[18]   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 [12],[13],[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 beginning balance    
Fair value at ending balance [3],[4],[21] $ 13,342  
Interest [3],[4],[21] 10.00%  
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[9] $ 129  
Investment owned, balance (in shares) [10],[11] 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 beginning balance    
Fair value at ending balance [4] $ 370  
Interest [4] 11.00%  
Investment, interest rate, paid in kind [4] 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 beginning balance    
Fair value at ending balance [3],[4],[39] $ 13,456  
Interest [3],[4],[39] 8.40%  
Investment, Identifier [Axis]: Comply365, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[39] $ (19)  
Interest [3],[4],[39] 8.40%  
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 [12],[13],[16],[31] $ 5,830  
Fair value at ending balance $ 5,123 [3],[4],[6],[19] $ 5,830 [12],[13],[16],[31]
Interest 5.80% [3],[4],[6],[19] 5.30% [12],[13],[16],[31]
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [6],[9] $ 119  
Investment owned, balance (in shares) [6],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[6] $ 29,529  
Interest [4],[6] 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 [13],[16] $ 587  
Fair value at ending balance $ 178 [4],[6],[9] $ 587 [13],[16]
Investment owned, balance (in shares) 440 [4],[6],[10],[11] 440 [13],[16],[17],[18]
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 [13],[16] $ 252  
Fair value at ending balance $ 427 [4],[6],[9] $ 252 [13],[16]
Investment owned, balance (in shares) 191 [4],[6],[10],[11] 191 [13],[16],[17],[18]
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 [12],[13],[16],[27] $ 3,938  
Fair value at ending balance $ 3,548 [3],[4],[6],[25] $ 3,938 [12],[13],[16],[27]
Interest 3.30% [3],[4],[6],[25] 6.50% [12],[13],[16],[27]
Investment, interest rate, paid in kind [3],[4],[6],[25] 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 [12],[13],[14] $ 13,968  
Fair value at ending balance [12],[13],[14]   $ 13,968
Interest [12],[13],[14]   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 [13],[40],[46] 2,596  
Fair value at ending balance $ 388 [4],[8],[47] $ 2,596 [13],[40],[46]
Investment, interest rate, paid in kind 15.00% [4],[8],[47] 15.00% [13],[40],[46]
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 [13],[40],[46] $ 27,450  
Fair value at ending balance $ 4,107 [4],[8],[47] $ 27,450 [13],[40],[46]
Investment, interest rate, paid in kind 15.00% [4],[8],[47] 15.00% [13],[40],[46]
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 [12],[13],[14],[16] $ 11,734  
Fair value at ending balance [12],[13],[14],[16]   $ 11,734
Interest [12],[13],[14],[16]   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 beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ 14,296  
Interest [3],[4],[5],[7] 9.80%  
Investment, Identifier [Axis]: DataOnline Corp., High Tech Industries, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ 2,100  
Interest [3],[4],[5],[7] 9.80%  
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[9] $ 51  
Investment owned, balance (in shares) [4],[10],[11] 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 [12],[13],[22] $ 713  
Fair value at ending balance $ 690 [3],[4],[26] $ 713 [12],[13],[22]
Interest 9.10% [3],[4],[26] 7.00% [12],[13],[22]
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 [13] $ 55  
Fair value at ending balance [13]   $ 55
Investment owned, balance (in shares) [13],[17],[18]   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 [12],[13],[14] (4)  
Fair value at ending balance $ (3) [3],[4],[26] $ (4) [12],[13],[14]
Interest 9.10% [3],[4],[26] 7.00% [12],[13],[14]
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 [12],[13],[14] $ 11,815  
Fair value at ending balance [12],[13],[14]   $ 11,815
Interest [12],[13],[14]   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 [12],[13],[22] 6,715  
Fair value at ending balance $ 6,378 [3],[4],[5] $ 6,715 [12],[13],[22]
Interest 7.60% [3],[4],[5] 5.80% [12],[13],[22]
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 [12],[13],[16],[33] $ 2,676  
Fair value at ending balance $ 3,359 [3],[4],[6],[25] $ 2,676 [12],[13],[16],[33]
Interest 6.80% [3],[4],[6],[25] 6.80% [12],[13],[16],[33]
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 [12],[13],[16],[33] $ 2,385  
Fair value at ending balance $ 2,073 [3],[4],[6],[19] $ 2,385 [12],[13],[16],[33]
Interest 7.10% [3],[4],[6],[19] 5.30% [12],[13],[16],[33]
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 beginning balance    
Fair value at ending balance [6],[7] $ 2,213  
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 beginning balance    
Fair value at ending balance [6],[7] 5,334  
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 [12],[13],[14],[16] 1,202  
Fair value at ending balance $ 105 [3],[4],[6],[19] $ 1,202 [12],[13],[14],[16]
Interest 6.90% [3],[4],[6],[19] 6.00% [12],[13],[14],[16]
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 [12],[13],[16],[27] $ 113  
Fair value at ending balance $ 1,216 [3],[4],[5],[6] $ 113 [12],[13],[16],[27]
Interest 9.40% [3],[4],[5],[6] 5.80% [12],[13],[16],[27]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[21] $ 987  
Interest [3],[4],[6],[21] 8.80%  
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 [12],[13],[14] $ 4,516  
Fair value at ending balance [12],[13],[14]   $ 4,516
Interest [12],[13],[14]   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 beginning balance    
Fair value at ending balance [3],[4],[5] $ 678  
Interest [3],[4],[5] 7.80%  
Investment, Identifier [Axis]: Dwyer Instruments, Inc., Electric, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[5] $ 24,535  
Interest [3],[4],[5] 8.40%  
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 [12],[13],[14] $ 9,136  
Fair value at ending balance $ 11,470 [3],[4],[5] $ 9,136 [12],[13],[14]
Interest 9.50% [3],[4],[5] 6.50% [12],[13],[14]
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 [12],[13],[14] $ (59)  
Fair value at ending balance $ 825 [3],[4],[5] $ (59) [12],[13],[14]
Interest 9.50% [3],[4],[5] 6.50% [12],[13],[14]
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 [12],[13],[14] $ 5,715  
Fair value at ending balance $ 6,028 [3],[4],[5] $ 5,715 [12],[13],[14]
Interest 9.40% [3],[4],[5] 6.80% [12],[13],[14]
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 [13] $ 531  
Fair value at ending balance $ 760 [4],[9] $ 531 [13]
Investment owned, balance (in shares) 530.92 [4],[10],[11] 530.92 [13],[17],[18]
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 [12],[13],[14] $ 14,216  
Fair value at ending balance $ 9,081 [3],[4],[5] $ 14,216 [12],[13],[14]
Interest 9.80% [3],[4],[5] 8.00% [12],[13],[14]
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    
Fair value at ending balance [4] $ 126,568  
Investment owned, balance (in shares) [4],[10],[11] 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    
Fair value at ending balance [4],[26] $ 6,182  
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    
Fair value at ending balance [4] $ 4,545  
Interest [4] 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 [13] $ 92,668  
Fair value at ending balance [13]   $ 92,668
Investment owned, balance (in shares) [13],[17],[18]   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 [13],[14] 1,818  
Fair value at ending balance [13],[14]   $ 1,818
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 [13] 4,738  
Fair value at ending balance [13]   $ 4,738
Interest [13]   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 0 89,850
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 33,900 2,818
Fair value at ending balance 126,568 92,668
Amount of Interest or Dividends Credited to Income $ 9,279 $ 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 5,287 1,691
Gross Reductions (909) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (14) 127
Fair value at ending balance 6,182 1,818
Amount of Interest or Dividends Credited to Income $ 319 $ 53
Debt instrument, basis spread on variable rate 7.25% 7.25%
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 4 4,502
Gross Reductions 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (197) 236
Fair value at ending balance 4,545 4,738
Amount of Interest or Dividends Credited to Income $ 257 $ 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 [12],[13],[14] $ 4,898  
Fair value at ending balance [12],[13],[14]   $ 4,898
Interest [12],[13],[14]   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 beginning balance    
Fair value at ending balance [3],[4],[5] $ 4,885  
Interest [3],[4],[5] 9.50%  
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 [12],[13],[14] $ 5,631  
Fair value at ending balance $ 5,465 [3],[4],[5] $ 5,631 [12],[13],[14]
Interest 9.40% [3],[4],[5] 6.80% [12],[13],[14]
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 [12],[13],[22] $ 5,795  
Fair value at ending balance [12],[13],[22]   $ 5,795
Interest [12],[13],[22]   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 [12],[13],[14] 225  
Fair value at ending balance [12],[13],[14]   $ 225
Interest [12],[13],[14]   6.80%
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 beginning balance    
Fair value at ending balance [3],[4],[6],[48] $ 1,549  
Interest [3],[4],[6],[48] 8.30%  
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 beginning balance    
Fair value at ending balance [3],[4],[21] $ 6,512  
Interest [3],[4],[21] 9.10%  
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 beginning balance    
Fair value at ending balance [3],[4],[21] $ 251  
Interest [3],[4],[21] 9.10%  
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 [12],[13],[16],[27] $ 1,621  
Fair value at ending balance $ 1,505 [3],[4],[6],[19] $ 1,621 [12],[13],[16],[27]
Interest 6.90% [3],[4],[6],[19] 6.00% [12],[13],[16],[27]
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 [12],[13],[14] $ 6,790  
Fair value at ending balance $ 6,773 [3],[4],[26] $ 6,790 [12],[13],[14]
Interest 8.90% [3],[4],[26] 6.50% [12],[13],[14]
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 [13] $ 30  
Fair value at ending balance $ 13 [4],[9] $ 30 [13]
Investment owned, balance (in shares) 1,160.9 [4],[10],[11] 1,160.9 [13],[17],[18]
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 [13] $ 132  
Fair value at ending balance $ 57 [4],[9] $ 132 [13]
Investment owned, balance (in shares) 5,104.3 [4],[10],[11] 5,104.32 [13],[17],[18]
Investment, Identifier [Axis]: Ferrellgas L.P., Oil & Gas Equipment & Services, OpCo Preferred Units (2,886 units)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [13],[16] $ 3,146  
Fair value at ending balance [13],[16]   $ 3,146
Investment owned, balance (in shares) [13],[16],[17],[18]   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 beginning balance    
Fair value at ending balance [4] $ 2,742  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [4] $ 7,540  
Investment, interest rate, paid in kind [4] 11.00%  
Investment owned, balance (in shares) [4],[10],[11] 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 [12],[13],[14] $ 1,306  
Fair value at ending balance $ 1,281 [3],[4],[5] $ 1,306 [12],[13],[14]
Interest 8.40% [3],[4],[5] 5.80% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[6] $ 2,138  
Interest [3],[4],[6] 5.50%  
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 [12],[13],[14] $ 4,184  
Fair value at ending balance $ 4,161 [3],[4],[5] $ 4,184 [12],[13],[14]
Interest 7.30% [3],[4],[5] 5.50% [12],[13],[14]
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[9] $ 967  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[21] $ 13,308  
Interest [3],[4],[21] 10.40%  
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 $ 13,773 $ 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 beginning balance    
Fair value at ending balance [4],[6],[9] $ 1,922  
Investment owned, balance (in shares) [4],[6],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[6],[32] $ 1,334  
Interest [3],[4],[6],[32] 9.30%  
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 [12],[13],[22] $ 4,541  
Fair value at ending balance $ 4,635 [3],[4],[5] $ 4,541 [12],[13],[22]
Interest 8.90% [3],[4],[5] 6.80% [12],[13],[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 $ 1,058 [4],[9] $ 926
Investment owned, balance (in shares) 937.5 [4],[10],[11] 937.5 [17],[18]
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 $ 91 [9] $ 111
Investment owned, balance (in shares) 192,000 [10],[11] 50,848 [17],[18]
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 [12],[13],[14] $ 3,880  
Fair value at ending balance $ 3,814 [3],[4],[5] $ 3,880 [12],[13],[14]
Interest 15.50% [3],[4],[5] 13.50% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[49] $ 397  
Interest [3],[4],[6],[49] 6.20%  
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 [13],[40] $ 11,500  
Fair value at ending balance $ 10,518 [4],[47] $ 11,500 [13],[40]
Interest 11.00% [4],[47] 11.00% [13],[40]
Investment, interest rate, paid in kind 1.00% [4],[47] 1.00% [13],[40]
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 [13],[40] $ 2,290  
Fair value at ending balance $ 1,284 [4],[9],[47] $ 2,290 [13],[40]
Investment owned, balance (in shares) 1,434,472.41 [4],[10],[11],[47] 1,434,472.41 [13],[17],[18],[40]
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 [13],[40] $ 1,184  
Fair value at ending balance $ 1,632 [4],[9],[47] $ 1,184 [13],[40]
Investment owned, balance (in shares) 715,649.59 [4],[10],[11],[47] 715,649.59 [13],[17],[18],[40]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[48] $ 2,301  
Interest [3],[4],[6],[48] 8.30%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[50] $ 3,775  
Interest [3],[4],[6],[50] 8.30%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 653  
Interest [3],[4],[6],[19] 5.80%  
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 [12],[22] $ 774  
Fair value at ending balance $ 648 [3],[26] $ 774 [12],[22]
Interest 9.40% [3],[26] 7.80% [12],[22]
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 [13],[40] $ 22,215  
Fair value at ending balance $ 11,386 [3],[4],[39] $ 22,215 [13],[40]
Interest 11.40% [3],[4],[39] 12.00% [13],[40]
Investment, interest rate, paid in kind [13],[40]   4.80%
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, Second Lien Note1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[39] $ (20)  
Interest [3],[4],[39] 11.40%  
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 [12],[13],[22] $ 13,137  
Fair value at ending balance $ 10,825 [3],[4],[5] $ 13,137 [12],[13],[22]
Interest 6.00% [3],[4],[5] 6.80% [12],[13],[22]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[48] $ 565  
Interest [3],[4],[6],[48] 8.30%  
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 [13] $ 9,093  
Fair value at ending balance [13]   $ 9,093
Investment, interest rate, paid in kind [13]   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 beginning balance    
Fair value at ending balance [4] $ 1,163  
Investment, interest rate, paid in kind [4] 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 beginning balance    
Fair value at ending balance [4] $ 9,261  
Investment, interest rate, paid in kind [4] 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 [12],[13],[14] $ 13,794  
Fair value at ending balance $ 13,789 [3],[4],[5] $ 13,794 [12],[13],[14]
Interest 8.40% [3],[4],[5] 5.80% [12],[13],[14]
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 [12],[13],[14] $ 7,221  
Fair value at ending balance $ 7,264 [3],[4],[26] $ 7,221 [12],[13],[14]
Interest 8.60% [3],[4],[26] 6.50% [12],[13],[14]
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 [12],[13],[14] $ (53)  
Fair value at ending balance $ (37) [3],[4],[26] $ (53) [12],[13],[14]
Interest 8.60% [3],[4],[26] 6.50%
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 [12],[13],[16],[33] $ 8,612  
Fair value at ending balance $ 2,917 [3],[4],[6],[19] $ 8,612 [12],[13],[16],[33]
Interest 5.00% [3],[4],[6],[19] 5.00% [12],[13],[16],[33]
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 [13],[40] $ 5,416  
Fair value at ending balance [13],[40]   $ 5,416
Interest [13],[40]   12.00%
Investment, interest rate, paid in kind [13],[40]   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 beginning balance    
Fair value at ending balance [3],[4],[7],[8],[23] 0  
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 [12],[13],[14] 3,753  
Fair value at ending balance $ 3,737 [3],[4],[21] $ 3,753 [12],[13],[14]
Interest 8.10% [3],[4],[21] 5.80% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[15] $ 7,608  
Interest [3],[4],[6],[15] 6.70%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 1,524  
Interest [3],[4],[6],[19] 7.40%  
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) (999)  
Fair value at ending balance 4,220 $ 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 beginning balance    
Fair value at ending balance [4],[9] $ 4,220  
Investment owned, balance (in shares) [4],[9],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[39] $ 3,839  
Interest [3],[4],[39] 11.00%  
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 beginning balance    
Fair value at ending balance [3],[4],[39] $ 3,902  
Investment, interest rate, paid in kind [3],[4],[39] 11.50%  
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 3,550  
Gross Reductions 0  
Amount of Realized Gain (Loss) 101  
Amount of Unrealized Gain (Loss) 188  
Fair value at ending balance 3,839 0
Amount of Interest or Dividends Credited to Income $ 255  
Debt instrument, basis spread on variable rate 8.00%  
Interest 11.00%  
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 3,982  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (80)  
Fair value at ending balance 3,902 0
Amount of Interest or Dividends Credited to Income $ 251  
Debt instrument, basis spread on variable rate [3],[4],[39] 10.00%  
Interest 11.50%  
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 [12],[13],[14] $ 4,268  
Fair value at ending balance [12],[13],[14]   $ 4,268
Interest [12],[13],[14]   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 [12],[13],[14] 6,603  
Fair value at ending balance $ 2,980 [3],[4],[5] $ 6,603 [12],[13],[14]
Interest 10.80% [3],[4],[5] 8.00% [12],[13],[14]
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 [12],[13] $ 0  
Fair value at ending balance $ 0 [4],[9] $ 0 [12],[13]
Investment owned, balance (in shares) 68,950 [4],[10],[11] 68,950 [12],[13],[17],[18]
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 [12],[13],[16],[33] $ 6,938  
Fair value at ending balance $ 2,416 [3],[4],[6],[25] $ 6,938 [12],[13],[16],[33]
Interest 5.50% [3],[4],[6],[25] 5.30% [12],[13],[16],[33]
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 [12],[13],[16],[27] $ 5,263  
Fair value at ending balance $ 4,527 [3],[4],[6],[19] $ 5,263 [12],[13],[16],[27]
Interest 6.40% [3],[4],[6],[19] 6.10% [12],[13],[16],[27]
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 [12],[13],[14] $ 6,407  
Fair value at ending balance $ 7,973 [3],[4],[5] $ 6,407 [12],[13],[14]
Interest 9.20% [3],[4],[5] 6.50% [12],[13],[14]
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[9] $ 143  
Investment owned, balance (in shares) [4],[10],[11] 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 [12],[13],[22] $ 705  
Fair value at ending balance $ 704 [3],[4],[26] $ 705 [12],[13],[22]
Interest 7.90% [3],[4],[26] 5.80% [12],[13],[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 [12],[13],[14] $ (2)  
Fair value at ending balance $ 4 [3],[4],[26] $ (2) [12],[13],[14]
Interest 7.90% [3],[4],[26] 5.80% [12],[13],[14]
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 [12],[13],[16],[27] $ 8,989  
Fair value at ending balance $ 2,502 [3],[4],[6],[25] $ 8,989 [12],[13],[16],[27]
Interest 6.20% [3],[4],[6],[25] 5.30% [12],[13],[16],[27]
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 [12],[13],[16],[27] $ 5,876  
Fair value at ending balance $ 5,183 [3],[4],[6],[25] $ 5,876 [12],[13],[16],[27]
Interest 6.00% [3],[4],[6],[25] 5.80% [12],[13],[16],[27]
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 beginning balance    
Fair value at ending balance [3],[7],[23] $ 2,356  
Interest [3],[7],[23] 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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 1,084  
Interest [3],[4],[6],[19] 6.40%  
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 beginning balance    
Fair value at ending balance [3],[7],[26] $ 2,669  
Interest [3],[7],[26] 10.60%  
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 beginning balance    
Fair value at ending balance [3],[5],[7],[8] $ 625  
Interest [3],[5],[7],[8] 9.40%  
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 beginning balance    
Fair value at ending balance [3],[5],[7] $ 4,460  
Interest [3],[5],[7] 10.30%  
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 [12],[13],[14] $ 3,711  
Fair value at ending balance $ 3,587 [3],[4],[26] $ 3,711 [12],[13],[14]
Interest 9.10% [26] 6.50% [12],[13],[14]
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 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (335)  
Fair value at ending balance 5,862 $ 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 [13],[16],[40] 0  
Fair value at ending balance $ 0 [4],[6],[9],[47] $ 0 [13],[16],[40]
Investment owned, balance (in shares) 35,571 [4],[6],[9],[10],[11],[47] 3,201 [13],[16],[17],[18],[40]
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 [13],[16],[40] $ 6,197  
Fair value at ending balance $ 5,862 [4],[6],[9],[47] $ 6,197 [13],[16],[40]
Investment owned, balance (in shares) 9,159,085 [4],[6],[9],[10],[11],[47] 9,159,085 [13],[16],[17],[18],[40]
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 [12],[13],[16],[24] $ 2,315  
Fair value at ending balance [12],[13],[16],[24]   $ 2,315
Interest [12],[13],[16],[24]   4.50%
Investment, interest rate, paid in kind [12],[13],[16],[24]   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 beginning balance    
Fair value at ending balance [3],[4],[6],[25] $ 3,672  
Interest [3],[4],[6],[25] 6.30%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[23] $ 6,578  
Interest [3],[4],[6],[23] 8.00%  
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 [12],[13],[14] $ 2,486  
Fair value at ending balance $ 4,736 [3],[4],[39] $ 2,486 [12],[13],[14]
Interest 8.20% [3],[4],[39] 6.30% [12],[13],[14]
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 [12],[13],[14] $ (6)  
Fair value at ending balance $ (7) [3],[4],[39] $ (6) [12],[13],[14]
Interest 8.20% [3],[4],[39] 6.30% [12],[13],[14]
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 [13],[40] $ 2,650  
Fair value at ending balance $ 2,650 [4],[47] $ 2,650 [13],[40]
Interest 12.00% [4],[47] 12.00% [13],[40]
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 $ 3,815 $ 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 [16] $ 37,601  
Fair value at ending balance $ 40,845 [6],[9] $ 37,601 [16]
Interest [6],[9],[10],[11] 9.10%  
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]    
Interest [16],[17],[18]   9.10%
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) (1,756) 4,977
Fair value at ending balance 40,845 37,601
Amount of Interest or Dividends Credited to Income $ 0 $ 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% 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 beginning balance    
Fair value at ending balance [3],[4],[6],[50] $ 3,099  
Interest [3],[4],[6],[50] 9.40%  
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 beginning balance    
Fair value at ending balance [3],[4],[26] $ 2,740  
Interest [3],[4],[26] 8.90%  
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 beginning balance    
Fair value at ending balance [4],[9] $ 97  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[26] $ (7)  
Interest [3],[4],[26] 8.90%  
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 [12],[13],[24] $ 8,728  
Fair value at ending balance $ 5,546 [3],[4],[5] $ 8,728 [12],[13],[24]
Interest 7.00% [3],[4],[5] 6.00% [12],[13],[24]
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    
Fair value at ending balance [4],[9] $ 192  
Investment owned, balance (in shares) [4],[10],[11] 203.2  
Investment, Identifier [Axis]: Kano Laboratories LLC, Chemicals, Plastics & Rubber, Partnership Equity (203.2 units)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [13] $ 205  
Fair value at ending balance [13]   $ 205
Investment owned, balance (in shares) [13],[17],[18]   203.2
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 1,588  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (297)  
Fair value at ending balance 1,291 $ 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 (406)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 2,379 0
Amount of Interest or Dividends Credited to Income $ 220  
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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 1,291  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[7] $ 2,379  
Investment, interest rate, paid in kind [4],[7] 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 [12],[13],[22] $ 7,080  
Fair value at ending balance $ 7,041 [3],[4],[5] $ 7,080 [12],[13],[22]
Interest 7.90% [3],[4],[5] 5.30% [12],[13],[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 [12],[13],[14] $ 9,174  
Fair value at ending balance $ 9,132 [3],[4],[5] $ 9,174 [12],[13],[14]
Interest 8.60% [3],[4],[5] 7.00% [12],[13],[14]
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    
Fair value at ending balance [4],[9] $ 599  
Investment owned, balance (in shares) [4],[10],[11] 637,677.11  
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, Media & Entertainment, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 638  
Fair value at ending balance   $ 638
Investment owned, balance (in shares) [17],[18]   637,677.11
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 [12],[13],[14] 8,994  
Fair value at ending balance $ 8,781 [3],[4],[5] $ 8,994 [12],[13],[14]
Interest 8.30% [3],[4],[5] 6.30% [12],[13],[14]
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 [12],[13],[16],[33] $ 1,446  
Fair value at ending balance [12],[13],[16],[33]   $ 1,446
Interest [12],[13],[16],[33]   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 [12],[13],[16],[27] 4,810  
Fair value at ending balance $ 4,144 [3],[4],[6],[19] $ 4,810 [12],[13],[16],[27]
Interest 7.20% [3],[4],[6],[19] 6.00% [12],[13],[16],[27]
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[13],[16],[27] $ 295  
Fair value at ending balance [12],[13],[16],[27]   $ 295
Interest [12],[13],[16],[27]   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 [13],[16] 1,375  
Fair value at ending balance $ 1,246 [4],[6] $ 1,375 [13],[16]
Investment, interest rate, paid in kind 12.00% [4],[6] 12.00% [13],[16]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[39] $ 646  
Interest [3],[4],[6],[39] 6.80%  
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[6],[39] $ 35  
Interest [3],[4],[6],[39] 8.80%  
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 beginning balance    
Fair value at ending balance [3],[4],[5] $ 10,160  
Interest [3],[4],[5] 8.70%  
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4] $ 57  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[5] $ (36)  
Interest [3],[4],[5] 8.70%  
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 [12],[22] $ 128  
Fair value at ending balance $ 110 [3],[26] $ 128 [12],[22]
Interest 6.40% [3],[26] 4.30% [12],[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 [14] $ 7,959  
Fair value at ending balance $ 8,500 [4],[5] $ 7,959 [14]
Interest 3.00% [4],[5] 3.00% [14]
Investment, interest rate, paid in kind [14]   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 [13],[40],[46] $ 5,918  
Fair value at ending balance $ 0 [4],[8],[47] $ 5,918 [13],[40],[46]
Investment, interest rate, paid in kind 16.00% [4],[8],[47] 16.00% [13],[40],[46]
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 beginning balance    
Fair value at ending balance [3],[4],[21] $ 19,800  
Interest [3],[4],[21] 7.50%  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ 3,150  
Interest [3],[4],[5],[7] 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 beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ (50)  
Interest [3],[4],[5],[7] 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 [12],[13],[14] $ 910  
Fair value at ending balance $ 855 [3],[4],[5] $ 910 [12],[13],[14]
Interest 6.00% [3],[4],[5] 6.00% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[7],[26] $ 1,358  
Interest [3],[7],[26] 7.80%  
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 beginning balance    
Fair value at ending balance [3],[4],[26] $ 7,926  
Interest [3],[4],[26] 8.80%  
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 [12],[13],[14] $ 3,656  
Fair value at ending balance $ 3,604 [3],[4],[5] $ 3,656 [12],[13],[14]
Interest 8.40% [3],[4],[5] 6.50% [12],[13],[14]
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 [13] $ 761  
Fair value at ending balance $ 747 [4],[9] $ 761 [13]
Investment owned, balance (in shares) 746.66 [4],[10],[11] 746.66 [13],[17],[18]
Investment, Identifier [Axis]: MNS Buyer, Inc., Construction & Building, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[13],[22] $ 905  
Fair value at ending balance [12],[13],[22]   $ 905
Interest [12],[13],[22]   6.50%
Investment, Identifier [Axis]: MNS Buyer, Inc., Construction & Building, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [13] 78  
Fair value at ending balance [13]   $ 78
Investment owned, balance (in shares) [13],[17],[18]   76.92
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    
Fair value at ending balance [3],[4],[26] $ 899  
Interest [3],[4],[26] 8.60%  
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    
Fair value at ending balance [4],[9] $ 70  
Investment owned, balance (in shares) [4],[10],[11] 76.92  
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 [12],[13],[14],[16] $ 2,486  
Fair value at ending balance [12],[13],[14],[16]   $ 2,486
Interest [12],[13],[14],[16]   7.00%
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 325 $ 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) 1,799 (1,883)
Fair value at ending balance 9,498 7,699
Amount of Interest or Dividends Credited to Income 0 0
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 [13],[16],[40] 7,149  
Fair value at ending balance $ 7,149 [4],[6],[47] $ 7,149 [13],[16],[40]
Interest 6.00% [4],[6],[10],[11],[47] 6.00% [13],[16],[40]
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 [13],[16],[40] $ 7,699  
Fair value at ending balance [13],[16],[40]   $ 7,699
Investment owned, balance (in shares) [13],[16],[17],[18],[40]   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 beginning balance    
Fair value at ending balance [4],[6],[9],[47] $ 9,498  
Investment owned, balance (in shares) [4],[6],[9],[10],[11],[47] 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) (147) (37)
Fair value at ending balance 41 188
Amount of Interest or Dividends Credited to Income (879) 643
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 [16],[40] 188  
Fair value at ending balance $ 41 [6],[47] 188 [16],[40]
Investment owned, balance (in shares) [6],[10],[11],[47] 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 [16],[40] $ 7,376  
Fair value at ending balance $ 1,637 [6],[47] 7,376 [16],[40]
Investment owned, balance (in shares) [6],[10],[11],[47] 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) (5,739) (1,523)
Fair value at ending balance 1,637 7,376
Amount of Interest or Dividends Credited to Income 0 0
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 beginning balance    
Fair value at ending balance [5],[6],[7] $ 4,351  
Interest [5],[6],[7] 11.50%  
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 beginning balance    
Fair value at ending balance [6],[7] $ 7,742  
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 [12],[13],[16],[27] 1,880  
Fair value at ending balance $ 1,961 [3],[4],[6],[19] $ 1,880 [12],[13],[16],[27]
Interest 6.90% [3],[4],[6],[19] 5.80% [12],[13],[16],[27]
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 [12],[13],[16],[27] $ (4)  
Fair value at ending balance $ (3) [3],[4],[6],[19] $ (4) [12],[13],[16],[27]
Interest 5.00% [3],[4],[6],[19] 5.00% [12],[13],[16],[27]
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 beginning balance    
Fair value at ending balance [3],[4],[39] $ 10,805  
Interest [3],[4],[39] 9.20%  
Investment, Identifier [Axis]: Marshall Excelsior Co., Capital Goods, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[39] $ 1,214  
Interest [3],[4],[39] 9.20%  
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 [12],[13],[14] $ 2,933  
Fair value at ending balance $ 2,911 [3],[4],[5] $ 2,933 [12],[13],[14]
Interest 9.30% [3],[4],[5] 7.00% [12],[13],[14]
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 [12],[13],[28] $ 4,442  
Fair value at ending balance $ 3,637 [3],[4],[42] $ 4,442 [12],[13],[28]
Interest 8.20% [3],[4],[42] 7.00% [12],[13],[28]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[30] $ 7,485  
Interest [3],[4],[6],[30] 7.50%  
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 [12],[14] $ 4,362  
Fair value at ending balance $ 4,200 [3],[4],[23] $ 4,362 [12],[14]
Interest 9.90% [3],[4],[23] 7.50% [12],[14]
Investment, Identifier [Axis]: Mercell Holding AS, Technology, Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[6],[9] $ 105  
Investment owned, balance (in shares) [4],[6] 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 beginning balance    
Fair value at ending balance [4],[6],[9] $ 0  
Investment owned, balance (in shares) [4],[6] 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 beginning balance    
Fair value at ending balance [3],[4],[6],[51] $ 3,286  
Interest [3],[4],[6],[51] 8.10%  
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 [12],[13],[16],[52] $ 8,299  
Fair value at ending balance $ 7,217 [3],[4],[6],[20] $ 8,299 [12],[13],[16],[52]
Interest 8.80% [3],[4],[6],[20] 6.80% [12],[13],[16],[52]
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 [12],[13],[16],[38] $ 5,104  
Fair value at ending balance [12],[13],[16],[38]   $ 5,104
Interest [12],[13],[16],[38]   4.80%
Investment, Identifier [Axis]: Murphy Midco Limited, Media, Diversified & Production, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[6],[30] $ 767  
Interest [3],[4],[6],[30] 5.90%  
Investment, Identifier [Axis]: Murphy Midco Limited, Media, Diversified & Production, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[6],[30] $ 129  
Interest [3],[4],[6],[30] 6.20%  
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 [12],[13],[14] $ 7,313  
Fair value at ending balance $ 6,873 [3],[4],[26] $ 7,313 [12],[13],[14]
Interest 8.70% [3],[4],[26] 7.00% [12],[13],[14]
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 [12],[13],[22] $ 4,677  
Fair value at ending balance $ 4,707 [3],[4],[26] $ 4,677 [12],[13],[22]
Interest 7.30% [3],[4],[26] 5.30% [12],[13],[22]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 1,902  
Interest [3],[4],[6],[19] 7.40%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[48] $ 17,049  
Interest [3],[4],[6],[48] 8.50%  
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 [13] $ 459  
Fair value at ending balance $ 369 [4],[9] $ 459 [13]
Investment owned, balance (in shares) 4,587.38 [4],[10],[11] 4,587.38 [13],[17],[18]
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 [13] $ 51  
Fair value at ending balance $ 0 [4],[9] $ 51 [13]
Investment owned, balance (in shares) 509.71 [4],[10],[11] 509.71 [13],[17],[18]
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 [12],[13],[14] $ 5,580  
Fair value at ending balance $ 5,229 [3],[4],[5] $ 5,580 [12],[13],[14]
Interest 8.90% [3],[4],[5] 6.30% [12],[13],[14]
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 [12],[13],[14] $ (23)  
Fair value at ending balance $ (35) [3],[4],[5] $ (23) [12],[13],[14]
Interest 8.90% [3],[4],[5] 6.30% [12],[13],[14]
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 [12],[13],[14] $ 2,703  
Fair value at ending balance $ 2,679 [3],[4],[26] $ 2,703 [12],[13],[14]
Interest 8.20% [3],[4],[26] 6.30% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[30] $ 1,395  
Interest [3],[4],[6],[30] 5.90%  
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 [12],[13],[16],[29] $ 1,630  
Fair value at ending balance [12],[13],[16],[29]   $ 1,630
Interest [12],[13],[16],[29]   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 [12],[13],[16],[29] 101  
Fair value at ending balance [12],[13],[16],[29]   $ 101
Interest [12],[13],[16],[29]   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 beginning balance    
Fair value at ending balance [3],[4],[6],[30] $ 171  
Interest [3],[4],[6],[30] 5.90%  
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 [12],[13],[14] $ 2,450  
Fair value at ending balance $ 2,438 [3],[4],[5] $ 2,450 [12],[13],[14]
Interest 8.40% [3],[4],[5] 5.80% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[35] $ 3,173  
Interest [3],[4],[6],[35] 7.60%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[15] $ 421  
Interest [3],[4],[6],[15] 7.60%  
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 [12],[13],[14] $ 8,331  
Fair value at ending balance $ 5,505 [3],[4],[26] $ 8,331 [12],[13],[14]
Interest 9.10% [3],[4],[26] 6.80% [12],[13],[14]
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 [13] $ 211  
Fair value at ending balance $ 211 [4],[9] $ 211 [13]
Investment owned, balance (in shares) 210,920.11 [4],[10],[11] 210,920.11 [13],[17],[18]
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[13],[14] $ (27)  
Fair value at ending balance $ (23) [3],[4],[26] $ (27) [12],[13],[14]
Interest 9.10% [3],[4],[26] 6.80% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[39] $ 3,561  
Interest [3],[4],[39] 8.00%  
Investment, Identifier [Axis]: OAC Holdings I Corp, Automotive, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[39] $ 545  
Interest [3],[4],[39] 8.00%  
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 [12],[13],[16],[27] $ 2,843  
Fair value at ending balance $ 3,088 [3],[4],[6],[19] $ 2,843 [12],[13],[16],[27]
Interest 6.80% [3],[4],[6],[19] 5.80% [12],[13],[16],[27]
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 [12],[13],[22] $ 2,235  
Fair value at ending balance $ 2,230 [3],[4],[5] $ 2,235 [12],[13],[22]
Interest 8.90% [3],[4],[5] 6.80% [12],[13],[22]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[9] $ 67  
Investment owned, balance (in shares) [4] 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 [12],[13],[14] $ (4)  
Fair value at ending balance $ (3) [3],[4],[5] $ (4) [12],[13],[14]
Interest 8.90% [3],[4],[5] 6.80% [12],[13],[14]
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 [13],[16] $ 4,033  
Fair value at ending balance $ 3,269 [6] $ 4,033 [13],[16]
Interest 11.30% [6] 10.80% [13],[16]
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 beginning balance    
Fair value at ending balance [4],[7],[23] $ 3,629  
Interest [4],[7],[23] 7.90%  
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 [12],[13],[22] $ 11,491  
Fair value at ending balance $ 5,996 [3],[4],[39] $ 11,491 [12],[13],[22]
Interest 8.70% [3],[4],[39] 6.00% [12],[13],[22]
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 [12],[13],[14],[16] $ 2,267  
Fair value at ending balance $ 2,264 [3],[4],[6],[23] $ 2,267 [12],[13],[14],[16]
Interest 6.20% [3],[4],[6],[23] 5.50% [12],[13],[14],[16]
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 [12],[13],[16],[29] $ 3,028  
Fair value at ending balance $ 2,515 [3],[4],[6],[30] $ 3,028 [12],[13],[16],[29]
Interest 5.70% [3],[4],[6],[30] 5.30% [12],[13],[16],[29]
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 [12],[13],[14],[16] $ 584  
Fair value at ending balance [12],[13],[14],[16]   $ 584
Interest [12],[13],[14],[16]   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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 318  
Interest [3],[4],[6],[19] 6.30%  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[6] $ 584  
Interest [3],[4],[5],[6] 8.70%  
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 [12],[13],[16],[27] $ 369  
Fair value at ending balance [12],[13],[16],[27]   $ 369
Interest [12],[13],[16],[27]   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 [13] 29  
Fair value at ending balance $ 38 [4],[9] $ 29 [13]
Investment owned, balance (in shares) 28.8 [4],[10],[11] 26.32 [13],[17],[18]
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 [12],[13],[14] $ 8,707  
Fair value at ending balance $ 7,284 [3],[4],[5] $ 8,707 [12],[13],[14]
Interest 8.40% [3],[4],[5] 6.00% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 766  
Interest [3],[4],[6],[19] 6.10%  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[6] $ 845  
Interest [3],[4],[5],[6] 8.40%  
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 [12],[13],[16],[34] $ 8,529  
Fair value at ending balance [12],[13],[16],[34]   $ 8,529
Interest [12],[13],[16],[34]   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 beginning balance    
Fair value at ending balance [4] $ 4,530  
Interest [4] 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 [13],[16],[27] $ 4,638  
Fair value at ending balance $ 3,989 [3],[4],[6],[25] $ 4,638 [13],[16],[27]
Interest 8.40% [3],[4],[6],[25] 6.80% [13],[16],[27]
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 [12],[13],[14],[16] $ 3,591  
Fair value at ending balance $ 2,509 [3],[4],[6],[19] $ 3,591 [12],[13],[14],[16]
Interest 7.10% [3],[4],[6],[19] 7.80% [12],[13],[14],[16]
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 [12],[13],[16],[27] $ 3,068  
Fair value at ending balance $ 3,408 [3],[4],[5],[6] $ 3,068 [12],[13],[16],[27]
Interest 9.70% [3],[4],[5],[6] 6.80% [12],[13],[16],[27]
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 beginning balance    
Fair value at ending balance [4],[6] $ 99  
Interest [4],[6] 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 beginning balance    
Fair value at ending balance [4],[6] $ 98  
Interest [4],[6] 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 beginning balance    
Fair value at ending balance [4],[6] $ 95  
Interest [4],[6] 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 beginning balance    
Fair value at ending balance [4],[6] $ 94  
Interest [4],[6] 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 beginning balance    
Fair value at ending balance [4],[6] $ 4,823  
Interest [4],[6] 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 beginning balance    
Fair value at ending balance [3],[4],[6],[48] $ 2,580  
Interest [3],[4],[6],[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 [12],[13],[16],[52] $ 14,599  
Fair value at ending balance [12],[13],[16],[52]   $ 14,599
Interest [12],[13],[16],[52]   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 beginning balance    
Fair value at ending balance [3],[4],[5] $ 1,211  
Interest [3],[4],[5] 7.30%  
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 beginning balance    
Fair value at ending balance [4],[9] $ 741  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[5] $ (10)  
Interest [3],[4],[5] 7.30%  
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 [12],[13],[14] $ 4,158  
Fair value at ending balance [12],[13],[14]   $ 4,158
Interest [12],[13],[14]   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 [13] 382  
Fair value at ending balance [13]   $ 382
Investment owned, balance (in shares) [13],[17],[18]   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 [12],[13],[14] (11)  
Fair value at ending balance [12],[13],[14]   $ (11)
Interest [12],[13],[14]   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 [12],[13],[14] 44,008  
Fair value at ending balance $ 47,665 [3],[4],[5] $ 44,008 [12],[13],[14]
Interest 8.80% [3],[4],[5] 7.00% [12],[13],[14]
Investment, interest rate, paid in kind 4.00% [3],[4],[5] 4.00% [12],[13],[14]
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 [13] $ 0  
Fair value at ending balance $ 0 [4],[9] $ 0 [13]
Investment owned, balance (in shares) 25,582 [4],[10],[11] 28,260 [13],[17],[18]
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 [13] $ 0  
Fair value at ending balance $ 0 [4],[9] $ 0 [13]
Investment owned, balance (in shares) 8,634 [4],[10],[11] 9,537 [13],[17],[18]
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[9] $ 0  
Investment owned, balance (in shares) [4],[10],[11] 888  
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 [13] $ 0  
Fair value at ending balance [13]   $ 0
Investment owned, balance (in shares) [13],[17],[18]   980
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 [13] 0  
Fair value at ending balance $ 0 [4],[9] $ 0 [13]
Investment owned, balance (in shares) 2,282 [4],[10],[11] 2,520 [13],[17],[18]
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 beginning balance    
Fair value at ending balance [3],[4],[7],[26] $ 994  
Interest [3],[4],[7],[26] 10.10%  
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 [12],[13],[14] $ 14,556  
Fair value at ending balance $ 12,521 [3],[4],[5] $ 14,556 [12],[13],[14]
Interest 9.90% [3],[4],[5] 7.30% [12],[13],[14]
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 [12],[13],[16],[27] $ 4,010  
Fair value at ending balance $ 5,192 [3],[4],[6],[25] $ 4,010 [12],[13],[16],[27]
Interest 6.50% [3],[4],[6],[25] 6.00% [12],[13],[16],[27]
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 [12],[13],[16],[40] $ 2,764  
Fair value at ending balance $ 2,738 [3],[4],[6] $ 2,764 [12],[13],[16],[40]
Interest 8.60% [3],[4],[6] 5.50% [12],[13],[16],[40]
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 [12],[13],[14] $ 5,945  
Fair value at ending balance $ 5,196 [3],[4],[39] $ 5,945 [12],[13],[14]
Interest 7.10% [3],[4],[39] 6.30% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[23] $ 310  
Interest [3],[4],[23] 10.00%  
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 [12],[13],[14] $ 1,809  
Fair value at ending balance $ 1,797 [3],[4],[5] $ 1,809 [12],[13],[14]
Interest 7.20% [3],[4],[5] 5.50% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[23] $ 1,727  
Interest [3],[4],[23] 9.60%  
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[9] $ 163  
Investment owned, balance (in shares) [4],[10],[11] 241,935.48  
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[23] $ (12)  
Interest [3],[4],[23] 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 beginning balance    
Fair value at ending balance [4] $ 79  
Interest [4] 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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 0  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[6],[25] $ 1,303  
Interest 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 [12],[13],[16],[27] $ 2,195  
Fair value at ending balance [12],[13],[16],[27]   $ 2,195
Interest [12],[13],[16],[27]   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 [12],[13],[16],[27] 1,495  
Fair value at ending balance [12],[13],[16],[27]   $ 1,495
Interest [12],[13],[16],[27]   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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 1,900  
Interest 6.90%  
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 [12],[13],[16],[34] $ 1,605  
Fair value at ending balance $ 1,720 [3],[4],[6],[48] $ 1,605 [12],[13],[16],[34]
Interest 8.00% [3],[4],[6],[48] 6.00% [12],[13],[16],[34]
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 [12],[13],[14],[16] $ 6,851  
Fair value at ending balance $ 6,794 [3],[4],[5],[6] $ 6,851 [12],[13],[14],[16]
Interest 9.90% [3],[4],[5],[6] 6.80% [12],[13],[14],[16]
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 beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ 12,659  
Interest [3],[4],[5],[7] 8.70%  
Investment, Identifier [Axis]: RA Outdoors, LLC, High Tech Industries, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ (25)  
Interest [3],[4],[5],[7] 8.70%  
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 [12],[13],[14] $ 7,478  
Fair value at ending balance [12],[13],[14]   $ 7,478
Interest [12],[13],[14]   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 beginning balance    
Fair value at ending balance [3],[4],[25] $ 8,696  
Interest [3],[4],[25] 6.00%  
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 beginning balance    
Fair value at ending balance [3],[4],[5] $ 1,069  
Interest [3],[4],[5] 8.10%  
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 [12],[13],[14] $ 7,455  
Fair value at ending balance $ 7,229 [3],[4],[26] $ 7,455 [12],[13],[14]
Interest 8.60% [3],[4],[26] 7.00% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [4],[7] $ 1  
Investment owned, balance (in shares) [4],[7],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 0  
Investment owned, balance (in shares) [4],[7],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 217  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 0  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ 10,013  
Interest [3],[4],[5],[7] 9.00%  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ 2,877  
Interest [3],[4],[5],[7] 9.00%  
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 [12],[13],[14] $ 11,648  
Fair value at ending balance $ 11,566 [3],[4],[5] $ 11,648 [12],[13],[14]
Interest 9.40% [3],[4],[5] 7.50% [12],[13],[14]
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 [13] $ 150  
Fair value at ending balance $ 125 [4],[9] $ 150 [13]
Investment owned, balance (in shares) 187,235 [4],[10],[11] 187,235 [13],[17],[18]
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 [12],[13],[24] $ 4,733  
Fair value at ending balance [12],[13],[24]   $ 4,733
Interest [12],[13],[24]   6.50%
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 [13] 203  
Fair value at ending balance [13]   $ 203
Investment owned, balance (in shares) [13],[17],[18]   197,368.42
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    
Fair value at ending balance [3],[4],[5] $ 4,733  
Interest [3],[4],[5] 7.50%  
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    
Fair value at ending balance [4],[9] $ 197  
Investment owned, balance (in shares) [4],[10],[11] 197,368.42  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ 4,624  
Interest [3],[4],[5],[7] 10.80%  
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 [12],[13],[14] $ 3,930  
Fair value at ending balance $ 3,954 [3],[4],[5] $ 3,930 [12],[13],[14]
Interest 10.20% [3],[4],[5] 7.80% [12],[13],[14]
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 [12],[13],[16],[29] $ 2,776  
Fair value at ending balance $ 2,628 [3],[4],[6],[32] $ 2,776 [12],[13],[16],[29]
Interest 7.70% [3],[4],[6],[32] 6.80% [12],[13],[16],[29]
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 [12],[13],[16],[27] $ 1,843  
Fair value at ending balance $ 1,976 [3],[4],[6],[19] $ 1,843 [12],[13],[16],[27]
Interest 7.20% [3],[4],[6],[19] 5.50% [12],[13],[16],[27]
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 [12],[13],[16],[27] $ (5)  
Fair value at ending balance [12],[13],[16],[27]   $ (5)
Interest [12],[13],[16],[27]   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 [12],[13],[16],[27] 223  
Fair value at ending balance [12],[13],[16],[27]   $ 223
Interest [12],[13],[16],[27]   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 beginning balance    
Fair value at ending balance [3],[4],[39] $ 10,779  
Interest [3],[4],[39] 8.90%  
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[39] $ 373  
Interest [3],[4],[39] 8.90%  
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 [12],[13],[14] $ 9,543  
Fair value at ending balance $ 9,445 [3],[4],[5] $ 9,543 [12],[13],[14]
Interest 9.70% [3],[4],[5] 7.00% [12],[13],[14]
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 [12],[13],[14] $ 6,771  
Fair value at ending balance $ 6,396 [3],[4],[5] $ 6,771 [12],[13],[14]
Interest 8.90% [3],[4],[5] 6.30% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 110  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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 [12],[13],[22] $ 18,394  
Fair value at ending balance $ 11,130 [3],[4],[26] $ 18,394 [12],[13],[22]
Interest 8.80% [3],[4],[26] 6.80% [12],[13],[22]
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 [12],[13],[14],[16] $ 658  
Fair value at ending balance [12],[13],[14],[16]   $ 658
Interest [12],[13],[14],[16]   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 [12],[13],[16],[28] 2,722  
Fair value at ending balance $ 2,195 [3],[4],[6],[32] $ 2,722 [12],[13],[16],[28]
Interest 8.40% [3],[4],[6],[32] 6.80% [12],[13],[16],[28]
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 [12],[13],[22] $ 11,755  
Fair value at ending balance $ 11,813 [3],[4],[26] $ 11,755 [12],[13],[22]
Interest 9.10% [4],[26] 7.00% [12],[13],[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 [13] $ 510  
Fair value at ending balance $ 507 [4],[9] $ 510 [13]
Investment owned, balance (in shares) 372.1 [4],[10],[11] 372.1 [13],[17],[18]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[25] $ 1,819  
Interest [3],[4],[6],[25] 7.40%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[53] $ 3,072  
Interest [3],[4],[6],[53] 7.80%  
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 [12],[13],[14] $ 1,705  
Fair value at ending balance $ 1,739 [3],[4],[39] $ 1,705 [12],[13],[14]
Interest 9.20% [3],[4],[39] 6.30% [12],[13],[14]
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 [12],[13],[14] $ (7)  
Fair value at ending balance $ 0 [3],[4],[39] $ (7) [12],[13],[14]
Interest 9.20% [3],[4],[39] 6.30% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ 5,775  
Interest [3],[4],[6],[19] 6.60%  
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[6],[19] $ (21)  
Interest [3],[4],[6],[19] 6.60%  
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 5,871  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 5,871 $ 0
Amount of Interest or Dividends Credited to Income $ 219  
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    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Investment owned, balance (in shares) 17,100  
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 561  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 47  
Fair value at ending balance 608 0
Amount of Interest or Dividends Credited to Income $ 0  
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Investment owned, balance (in shares) 1,236  
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) 18,055  
Fair value at ending balance 56,808 0
Amount of Interest or Dividends Credited to Income 0  
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    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Investment, interest rate, paid in kind 5.00%  
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, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Investment, interest rate, paid in kind 3.10%  
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 10,513  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 10,513 0
Amount of Interest or Dividends Credited to Income 262  
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
Interest 6.00%  
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 7,610  
Gross Reductions (3,996)  
Amount of Realized Gain (Loss) (774)  
Amount of Unrealized Gain (Loss) (180)  
Fair value at ending balance 2,660 $ 0
Amount of Interest or Dividends Credited to Income 731  
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 [13],[16],[40] 5,451  
Fair value at ending balance $ 5,871 [4],[6],[47] $ 5,451 [13],[16],[40]
Investment, interest rate, paid in kind 5.00% [4],[6],[47] 5.00% [13],[16],[40]
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 [13],[16],[40] $ 24,825  
Fair value at ending balance [13],[16],[40]   $ 24,825
Investment owned, balance (in shares) [13],[16],[17],[18],[40]   900
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 beginning balance    
Fair value at ending balance [4],[6],[9],[47] $ 608  
Investment owned, balance (in shares) [4],[6],[9],[10],[11],[47] 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 beginning balance    
Fair value at ending balance [4],[6],[9],[47] $ 56,808  
Investment owned, balance (in shares) [4],[6],[9],[10],[11],[47] 1,236  
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 [13],[16],[40] $ 9,525  
Fair value at ending balance [13],[16],[40]   $ 9,525
Investment, interest rate, paid in kind [13],[16],[40]   3.10%
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 beginning balance    
Fair value at ending balance [4],[6],[47] $ 10,513  
Investment, interest rate, paid in kind [4],[6],[47] 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 [13],[16],[40] $ 7,307  
Fair value at ending balance $ 2,660 [4],[6],[47] $ 7,307 [13],[16],[40]
Interest 6.00% [4],[6],[47] 6.00% [13],[16],[40]
Investment, interest rate, paid in kind 9.00% [4],[6],[47] 9.00% [13],[16],[40]
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 beginning balance    
Fair value at ending balance [3],[4],[6],[25] $ 198  
Interest [3],[4],[6],[25] 5.80%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[25] $ 439  
Interest [3],[4],[6],[25] 5.80%  
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 [12],[22] $ 7,409  
Fair value at ending balance $ 7,057 [3],[5] $ 7,409 [12],[22]
Interest 10.80% [3],[5] 8.50% [12],[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 [12],[22] $ 3,365  
Fair value at ending balance $ 1,866 [3],[5] $ 3,365 [12],[22]
Interest 10.80% [3],[5] 8.50% [12],[22]
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 beginning balance    
Fair value at ending balance [6],[7] $ 40,216  
Interest [6],[7],[10],[11] 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) (10,005)  
Fair value at ending balance 40,216 $ 0
Amount of Interest or Dividends Credited to Income $ 3,245  
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Member Interest | Sierra Senior Loan Strategy JV I, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 89.01%  
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 [12],[13],[14] $ 16,094  
Fair value at ending balance $ 13,475 [3],[4],[5] $ 16,094 [12],[13],[14]
Interest 9.40% [3],[4],[5] 6.80% [12],[13],[14]
Investment, Identifier [Axis]: Smartling, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[13],[14] $ (24)  
Fair value at ending balance $ (20) [3],[4],[5] $ (24) [12],[13],[14]
Interest 9.40% [3],[4],[5] 6.80% [12],[13],[14]
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 [12],[13],[14] $ 4,553  
Fair value at ending balance $ 600 [3],[4],[23] $ 4,553 [12],[13],[14]
Interest 6.30% [3],[4],[23] 5.30% [12],[13],[14]
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 [12],[13],[14] $ (6)  
Fair value at ending balance $ 1,310 [3],[4],[23] $ (6) [12],[13],[14]
Interest 6.60% [3],[4],[23] 5.30% [12],[13],[14]
Investment, Identifier [Axis]: Smile Brands Group Inc., Health Care Services, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[23] $ 3,127  
Interest [3],[4],[23] 6.80%  
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 beginning balance    
Fair value at ending balance [6],[7] $ 1,129  
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 [12],[13],[14] 10,346  
Fair value at ending balance $ 20,695 [3],[4],[26] $ 10,346 [12],[13],[14]
Interest 8.60% [3],[4],[26] 6.50% [12],[13],[14]
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 [12],[13],[14],[16] $ 7,388  
Fair value at ending balance $ 2,453 [3],[4],[5],[6] $ 7,388 [12],[13],[14],[16]
Interest 9.20% [3],[4],[5],[6] 6.90% [12],[13],[14],[16]
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 [12],[13],[14] $ 22,711  
Fair value at ending balance $ 12,880 [3],[4],[5] $ 22,711 [12],[13],[14]
Interest 9.40% [3],[4],[5] 6.50% [12],[13],[14]
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[13],[14] $ (37)  
Fair value at ending balance $ (27) [3],[4],[5] $ (37) [12],[13],[14]
Interest 9.40% [3],[4],[5] 6.50% [12],[13],[14]
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 [12],[14] $ 17,192  
Fair value at ending balance [12],[14]   $ 17,192
Interest [12],[14]   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 beginning balance    
Fair value at ending balance [4] $ 7,046  
Investment, interest rate, paid in kind [4] 12.50%  
Investment owned, balance (in shares) [4],[10],[11] 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 [12],[13],[16],[22] $ 2,016  
Fair value at ending balance $ 1,912 [3],[4],[6],[26] $ 2,016 [12],[13],[16],[22]
Interest 8.00% [3],[4],[6],[26] 6.30% [12],[13],[16],[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 [12],[13],[16],[22] $ 432  
Fair value at ending balance $ 646 [3],[4],[6],[26] $ 432 [12],[13],[16],[22]
Interest 8.00% [3],[4],[6],[26] 6.30% [12],[13],[16],[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 [13] $ 65  
Fair value at ending balance $ 83 [4],[9] $ 65 [13]
Investment owned, balance (in shares) 1,589 [4],[10],[11] 1,227.79 [13],[17],[18]
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 [13] $ 1,960  
Fair value at ending balance $ 2,148 [4] $ 1,960 [13]
Investment, interest rate, paid in kind 7.80% [4] 8.80% [13]
Investment, Identifier [Axis]: TPC Group, Inc., Chemicals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[39] $ 40,116  
Interest [3],[4],[39] 7.40%  
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 beginning balance    
Fair value at ending balance [3],[4],[6] $ 9,405  
Investment, interest rate, paid in kind 9.30%  
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 beginning balance    
Fair value at ending balance [3],[4],[21] $ 10,919  
Interest [3],[4],[21] 8.90%  
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[21] $ (16)  
Interest [3],[4],[21] 8.90%  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ 12,138  
Interest [3],[4],[5],[7] 10.40%  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ 9,492  
Interest [3],[4],[5],[7] 7.80%  
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 beginning balance    
Fair value at ending balance [3],[4],[5],[7] $ 4,900  
Interest [3],[4],[5],[7] 11.80%  
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 [12],[13],[16],[27] $ 8,441  
Fair value at ending balance $ 3,357 [3],[4],[6],[19] $ 8,441 [12],[13],[16],[27]
Interest 6.70% [3],[4],[6],[19] 5.50% [12],[13],[16],[27]
Investment, Identifier [Axis]: Techone B.V., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[13],[16],[27] $ 97  
Fair value at ending balance $ 249 [3],[4],[6],[19] $ 97 [12],[13],[16],[27]
Interest 6.70% [3],[4],[6],[19] 5.50% [12],[13],[16],[27]
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 [12],[13],[14] $ 5,374  
Fair value at ending balance [12],[13],[14]   $ 5,374
Interest [12],[13],[14]   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 beginning balance    
Fair value at ending balance [3],[4],[5] $ 875  
Interest [3],[4],[5] 8.90%  
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 beginning balance    
Fair value at ending balance [3],[4],[5] $ 5,374  
Interest [3],[4],[5] 8.90%  
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 [12],[13],[14] $ (20)  
Fair value at ending balance $ (15) [3],[4],[5] $ (20) [12],[13],[14]
Interest 8.90% [3],[4],[5] 6.50% [12],[13],[14]
Investment, Identifier [Axis]: Terrybear, Inc., Consumer Products, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[9] $ 239  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [4] $ 254  
Interest [4] 10.00%  
Investment, interest rate, paid in kind [4] 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 [12],[13],[14] $ 776  
Fair value at ending balance $ 792 [3],[4],[26] $ 776 [12],[13],[14]
Interest 7.90% [3],[4],[26] 5.30% [12],[13],[14]
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 [12],[13],[14] $ (14)  
Fair value at ending balance $ (12) [3],[4],[26] $ (14) [12],[13],[14]
Interest 7.90% [3],[4],[26] 5.30% [12],[13],[14]
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 [13] $ 3,267  
Fair value at ending balance $ 3,323 [3],[4],[26] $ 3,267 [13]
Interest [3],[4],[26] 9.60%  
Investment, interest rate, paid in kind [13]   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 beginning balance    
Fair value at ending balance [3],[4],[21] $ 26,294  
Interest [3],[4],[21] 8.90%  
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 beginning balance    
Fair value at ending balance [4] $ 5,528  
Investment, interest rate, paid in kind [4] 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 [12],[13],[14] $ 19,874  
Fair value at ending balance $ 572 [3],[4],[26] $ 19,874 [12],[13],[14]
Interest 8.60% [3],[4],[26] 6.80% [12],[13],[14]
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 [12],[13],[14] $ (2)  
Fair value at ending balance $ 5,563 [3],[4],[26] $ (2) [12],[13],[14]
Interest 8.90% [3],[4],[26] 6.30% [12],[13],[14]
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 beginning balance    
Fair value at ending balance [3],[4],[26] $ 14,184  
Interest [3],[4],[26] 8.90%  
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 beginning balance    
Fair value at ending balance [4],[9] $ 971  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[39] $ 12,313  
Interest [3],[4],[39] 9.60%  
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles, 15.90% Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [16] $ 84,438  
Fair value at ending balance [16]   $ 84,438
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles, 15.90% Member Interest | Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent [16],[17],[18]   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 beginning balance    
Fair value at ending balance [6] $ 43,729  
Interest [6],[10],[11] 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 (20,811) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (19,898) 5,012
Fair value at ending balance 43,729 84,438
Amount of Interest or Dividends Credited to Income $ 7,707 $ 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 16.00% 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 [12],[24] $ 6,482  
Fair value at ending balance [12],[24]   $ 6,482
Interest [12],[24]   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 beginning balance    
Fair value at ending balance [3],[23] $ 6,033  
Interest [3],[23] 9.00%  
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 beginning balance    
Fair value at ending balance [3],[4],[23] $ 3,500  
Interest [3],[4],[23] 14.00%  
Investment, interest rate, paid in kind [3],[4],[23] 5.00%  
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 [12],[13],[14] $ 5,846  
Fair value at ending balance $ 5,800 [3],[4],[5] $ 5,846 [12],[13],[14]
Interest 7.90% [3],[4],[5] 5.80% [12],[13],[14]
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 [12],[13],[22] $ 11,160  
Fair value at ending balance $ 11,037 [3],[4],[26] $ 11,160 [12],[13],[22]
Interest 7.40% [3],[4],[26] 4.60% [12],[13],[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 [12],[13],[14] $ 14,888  
Fair value at ending balance $ 14,583 [3],[4],[5] $ 14,888 [12],[13],[14]
Interest 8.70% [3],[4],[5] 6.50% [12],[13],[14]
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 [12],[13],[14] $ 14,611  
Fair value at ending balance $ 19,023 [3],[4],[39] $ 14,611 [12],[13],[14]
Interest 9.90% [3],[4],[39] 7.30% [12],[13],[14]
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[7],[9] $ 0  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 0  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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 [13] $ 412  
Fair value at ending balance $ 412 [4],[9] $ 412 [13]
Investment owned, balance (in shares) 440.97 [4],[10],[11] 440.97 [13],[17],[18]
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 [12],[13],[14] $ 11,778  
Fair value at ending balance $ 6,830 [3],[4],[5] $ 11,778 [12],[13],[14]
Interest 8.30% [3],[4],[5] 6.30% [12],[13],[14]
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 [12],[13],[14] $ 8,220  
Fair value at ending balance $ 7,305 [3],[4],[5] $ 8,220 [12],[13],[14]
Interest 10.20% [3],[4],[5] 7.00% [12],[13],[14]
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 [13],[40] $ 8,627  
Fair value at ending balance $ 8,584 [4],[47] $ 8,627 [13],[40]
Interest 10.00% [4],[47] 10.00% [13],[40]
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 [12],[13],[14] $ 4,423  
Fair value at ending balance $ 4,907 [3],[4],[15] $ 4,423 [12],[13],[14]
Interest 9.20% [3],[4],[15] 7.00% [12],[13],[14]
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 [13],[40] $ 1,785  
Fair value at ending balance $ 1,814 [4],[47] $ 1,785 [13],[40]
Interest 9.50% [4],[47] 9.50% [13],[40]
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 [13],[40],[54] $ 0  
Fair value at ending balance $ 0 [4],[47],[55] $ 0 [13],[40],[54]
Interest 9.50% [4],[47] 9.50% [13],[40],[54]
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 [12],[16],[22] $ 1,437  
Fair value at ending balance $ 1,400 [3],[6],[26] $ 1,437 [12],[16],[22]
Interest 7.10% [3],[6],[26] 5.00% [12],[16],[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 [12],[13],[16],[31] $ 12,090  
Fair value at ending balance $ 9,726 [3],[4],[6],[32] $ 12,090 [12],[13],[16],[31]
Interest 9.40% [3],[4],[6],[32] 7.10% [12],[13],[16],[31]
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 [12],[13],[14] $ 16,222  
Fair value at ending balance [12],[13],[14]   $ 16,222
Interest [12],[13],[14]   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 beginning balance    
Fair value at ending balance [3],[4],[39] $ 15,791  
Interest [3],[4],[39] 8.00%  
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), Legal Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[39] $ 128  
Interest [3],[4],[39] 8.30%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[32] $ 784  
Interest [3],[4],[6],[32] 7.00%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[25] $ 665  
Interest [3],[4],[6],[25] 5.70%  
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 [12],[13],[16],[27] $ 1,673  
Fair value at ending balance $ 1,451 [3],[4],[6],[19] $ 1,673 [12],[13],[16],[27]
Interest 6.40% [3],[4],[6],[19] 5.30% [12],[13],[16],[27]
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 [12],[13],[14],[16] $ 3,451  
Fair value at ending balance $ 3,475 [3],[4],[5],[6] $ 3,451 [12],[13],[14],[16]
Interest 8.90% [3],[4],[5],[6] 5.50% [12],[13],[14],[16]
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 beginning balance    
Fair value at ending balance [6],[7] $ 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 beginning balance    
Fair value at ending balance [6],[7] 2,212  
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 [12],[13],[22] 4,764  
Fair value at ending balance $ 4,754 [3],[4],[26] $ 4,764 [12],[13],[22]
Interest 7.90% [3],[4],[26] 4.80% [12],[13],[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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 2  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 3  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 5,591  
Investment, Identifier [Axis]: Victoria Bidco Limited, Industrial Machinery, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[6],[42] $ 3,396  
Interest [3],[4],[6],[42] 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 beginning balance    
Fair value at ending balance [3],[7],[26] $ 5,383  
Interest [3],[7],[26] 10.00%  
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 $ 4,274 [4] $ 4,905
Interest 6.30% [4] 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 [12],[13],[14] $ 7,676  
Fair value at ending balance $ 7,723 [3],[4],[5] $ 7,676 [12],[13],[14]
Interest 8.60% [3],[4],[5] 6.30% [12],[13],[14]
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 [13] $ 171  
Fair value at ending balance $ 329 [4],[9] $ 171 [13]
Investment owned, balance (in shares) 16,442.9 [4],[10],[11] 16,442.9 [13],[17],[18]
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 [12],[13],[14] $ 2,152  
Fair value at ending balance [12],[13],[14]   $ 2,152
Interest [12],[13],[14]   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 beginning balance    
Fair value at ending balance [3],[4],[5] $ (16)  
Interest [3],[4],[5] 7.10%  
Investment, Identifier [Axis]: W2O Holdings, Inc., Healthcare Technology, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[23] $ 3,323  
Interest [4],[23] 7.60%  
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 [16] 13,501  
Fair value at ending balance [16]   $ 13,501
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 beginning balance    
Fair value at ending balance [6] $ 21,371  
Interest [6],[10],[11] 20.00%  
Investment, Identifier [Axis]: Waccamaw River LLC, Investment Funds & Vehicles, 20% Member Interest | Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent [16],[17],[18]   20.00%
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) (930)  
Fair value at ending balance 21,371 $ 13,501
Amount of Interest or Dividends Credited to Income $ 1,314  
Investment, Identifier [Axis]: Waccamaw River LLC, Member Interest | Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 20.00%  
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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 220  
Investment owned, balance (in shares) [4],[7],[9],[10],[11] 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 beginning balance    
Fair value at ending balance [4],[7],[9] $ 0  
Interest [4],[7],[9],[10],[11] 1.62%  
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 beginning balance    
Fair value at ending balance [5],[7] $ 34  
Interest [5],[7] 7.60%  
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]    
Interest 12.00%  
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 beginning balance    
Fair value at ending balance [4] $ 14,606  
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 beginning balance    
Fair value at ending balance [3],[5],[7] $ 42  
Interest [3],[5],[7] 9.60%  
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 [13] $ 1,663  
Fair value at ending balance $ 1,449 [4],[9] $ 1,663 [13]
Investment owned, balance (in shares) 1,663.31 [4],[10],[11] 1,663,307.18 [13],[17],[18]
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 [12],[13],[14] $ 11,282  
Fair value at ending balance $ 5,254 [3],[4],[5] $ 11,282 [12],[13],[14]
Interest 8.60% [3],[4],[5] 6.50% [12],[13],[14]
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 [12],[13],[14] $ 127  
Fair value at ending balance $ 1,367 [3],[4],[5] $ 127 [12],[13],[14]
Interest 8.60% [3],[4],[5] 6.50% [12],[13],[14]
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 [12],[13],[22] $ 3,280  
Fair value at ending balance $ 8,828 [3],[4],[26] $ 3,280 [12],[13],[22]
Interest 7.90% [3],[4],[26] 6.30% [12],[13],[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 [12],[13],[22] $ 8,872  
Fair value at ending balance $ 2,435 [3],[4],[26] $ 8,872 [12],[13],[22]
Interest 8.40% [3],[4],[26] 5.50% [12],[13],[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 beginning balance    
Fair value at ending balance [4],[6],[9] $ 510  
Investment owned, balance (in shares) [4],[6],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[6],[32] $ 5,035  
Interest [3],[4],[6],[32] 6.90%  
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 beginning balance    
Fair value at ending balance [4],[6] $ 2,316  
Investment, interest rate, paid in kind [4],[6] 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 beginning balance    
Fair value at ending balance [3],[4],[5] $ 2,634  
Interest [3],[4],[5] 8.40%  
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [4],[9] $ 179  
Investment owned, balance (in shares) [4],[10],[11] 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 beginning balance    
Fair value at ending balance [3],[4],[5] $ (13)  
Interest [3],[4],[5] 8.40%  
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 beginning balance    
Fair value at ending balance [3],[4],[6],[32] $ 5,229  
Interest [3],[4],[6],[32] 8.40%  
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Services: Business, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[6],[32] $ (11)  
Interest [3],[4],[6],[32] 8.40%  
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    
Fair value at ending balance [3],[4],[26] $ 3,520  
Interest [3],[4],[26] 8.10%  
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance [3],[4],[26] $ (3)  
Interest [3],[4],[26] 8.10%  
1888 Industrial Services, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance $ 1,171  
Charming Charlie, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance 0  
Eclipse Business Capital, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 99,224  
Fair value at ending balance 137,295 $ 99,224
Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 37,601  
Fair value at ending balance 40,845 37,601
JSC Tekers Holdings    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 6,197  
Fair value at ending balance 5,862 6,197
Kemmerer Operations LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance 3,670  
Security Holdings B.V.    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 47,108  
Fair value at ending balance 76,460 47,108
Sierra Senior Loan Strategy JV I, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance 40,216  
Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 84,438  
Fair value at ending balance 43,729 84,438
Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 13,501  
Fair value at ending balance 21,371 13,501
Black Angus Steakhouses, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance    
Fair value at ending balance 16,479  
MVC Automotive Group GmbH    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 14,848  
Fair value at ending balance 16,647 14,848
MVC Private Equity Fund LP    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 7,564  
Fair value at ending balance 1,678 7,564
Affiliate investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 288,069 78,599
Gross Additions 124,020 199,093
Gross Reductions (111,173) (7,106)
Amount of Realized Gain (Loss) 101 (101)
Amount of Unrealized Gain (Loss) (759) 17,584
Fair value at ending balance 300,258 288,069
Amount of Interest or Dividends Credited to Income 22,835 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 1,842  
Gross Reductions 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (671)  
Fair value at ending balance 1,171 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 0  
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 5,291 96,043
Gross Reductions (909) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 33,689 3,181
Fair value at ending balance 137,295 99,224
Amount of Interest or Dividends Credited to Income 9,855 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 12,751  
Gross Reductions 0  
Amount of Realized Gain (Loss) 101  
Amount of Unrealized Gain (Loss) (891)  
Fair value at ending balance 11,961 0
Amount of Interest or Dividends Credited to Income 506  
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) (1,756) 4,977
Fair value at ending balance 40,845 37,601
Amount of Interest or Dividends Credited to Income 0 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 4,373  
Gross Reductions (406)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (297)  
Fair value at ending balance 3,670 0
Amount of Interest or Dividends Credited to Income 220  
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) (10,005)  
Fair value at ending balance 40,216 0
Amount of Interest or Dividends Credited to Income 3,245  
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 (20,811) 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (19,898) 5,012
Fair value at ending balance 43,729 84,438
Amount of Interest or Dividends Credited to Income 7,707 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) (930) (194)
Fair value at ending balance 21,371 13,501
Amount of Interest or Dividends Credited to Income 1,314 280
Control investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 22,412 25,855
Gross Additions 99,347 4,500
Gross Reductions (17,750) (4,474)
Amount of Realized Gain (Loss) (1,587) 0
Amount of Unrealized Gain (Loss) 14,704 (3,469)
Fair value at ending balance 117,126 22,412
Amount of Interest or Dividends Credited to Income 1,192 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 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (335)  
Fair value at ending balance 5,862 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 77,875  
Gross Reductions (17,750)  
Amount of Realized Gain (Loss) (1,587)  
Amount of Unrealized Gain (Loss) 17,922  
Fair value at ending balance 76,460 0
Amount of Interest or Dividends Credited to Income 1,386  
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) 1,204  
Fair value at ending balance 16,479 0
Amount of Interest or Dividends Credited to Income 360  
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) 1,799 (1,883)
Fair value at ending balance 16,647 14,848
Amount of Interest or Dividends Credited to Income 325 435
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) (5,886) (1,560)
Fair value at ending balance 1,678 7,564
Amount of Interest or Dividends Credited to Income $ (879) $ 643
[1] Some or all of the investment is or will be encumbered as security for the Company's senior secured credit facility with ING Capital LLC.
[2] Some or all of the investment is or will be encumbered as security for the Company's $1.1 billion senior secured credit facility with ING Capital LLC initially entered into in February 2019 (as amended, restated and otherwise modified from time to time, the "February 2019 Credit Facility").
[3] Debt investment includes interest rate floor feature.
[4] The fair value of the investment was determined using significant unobservable inputs.
[5] The interest rate on these loans is subject to 3 Month LIBOR, which as of September 30, 2022 was 3.75471%.
[6] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 26.0% of total investments at fair value as of September 30, 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).
[7] Investment was purchased as part of the Sierra Acquisition and is part of the Sierra Reference Portfolio for purposes of the Sierra Credit Support Agreement.
[8] Non-accrual investment.
[9] Investment is non-income producing.
[10] 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. 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, BBSY, STIBOR, CDOR, SOFR, SONIA, SARON, NIBOR, BKBM 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.
[11] All of the Company’s portfolio company investments (including joint venture investments), which as of September 30, 2022 represented 189.9% 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.
[12] Debt investment includes interest rate floor feature.
[13] The fair value of the investment was determined using significant unobservable inputs.
[14] The interest rate on these loans is subject to 3 Month LIBOR, which as of December 31, 2021 was 0.20913%.
[15] The interest rate on these loans is subject to 6 Month SOFR, which as of September 30, 2022 was 3.99102%.
[16] 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).
[17] 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.
[18] 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.
[19] The interest rate on these loans is subject to 3 Month EURIBOR, which as of September 30, 2022 was 1.17300%.
[20] The interest rate on these loans is subject to 1 Month BBSY, which as of September 30, 2022 was 2.70750%.
[21] The interest rate on these loans is subject to 1 Month SOFR, which as of September 30, 2022 was 3.04205%.
[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 LIBOR, which as of September 30, 2022 was 4.23200%.
[24] The interest rate on these loans is subject to 6 Month LIBOR, which as of December 31, 2021 was 0.33875%.
[25] The interest rate on these loans is subject to 6 Month EURIBOR, which as of September 30, 2022 was 1.80900%.
[26] The interest rate on these loans is subject to 1 Month LIBOR, which as of September 30, 2022 was 3.14271%.
[27] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2021 was -0.57200%.
[28] The interest rate on these loans is subject to 3 Month GBP LIBOR, which as of December 31, 2021 was 0.26225%.
[29] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2021 was 0.49870%.
[30] The interest rate on these loans is subject to 6 Month SONIA, which as of September 30, 2022 was 4.12810%.
[31] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2021 was 0.33830%.
[32] The interest rate on these loans is subject to 3 Month SONIA, which as of September 30, 2022 was 3.22510%.
[33] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2021 was -0.54600%.
[34] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2021 was 0.06770%.
[35] The interest rate on these loans is subject to 6 Month BBSY, which as of September 30, 2022 was 3.56880%.
[36] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2021 was -0.00050%.
[37] The interest rate on these loans is subject to 3 Month STIBOR, which as of September 30, 2022 was 1.72500%.
[38] The interest rate on these loans is subject to 6 Month GBP LIBOR, which as of December 31, 2021 was 0.47363%.
[39] The interest rate on these loans is subject to 3 Month SOFR, which as of September 30, 2022 was 3.59329%.
[40] 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.
[41] The interest rate on these loans is subject to Prime, which as of September 30, 2022 was 6.25000%.
[42] The interest rate on these loans is subject to 1 Month SONIA, which as of September 30, 2022 was 2.25330%.
[43] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2021 was 0.09125%.
[44] The interest rate on these loans is subject to 3 Month CDOR, which as of December 31, 2021 was 0.51750%.
[45] The interest rate on these loans is subject to 3 Month CDOR, which as of September 30, 2022 was 4.20000%.
[46] Non-accrual investment.
[47] 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.
[48] The interest rate on these loans is subject to 3 Month BBSY, which as of September 30, 2022 was 3.06310%.
[49] The interest rate on these loans is subject to 1 Month EURIBOR, which as of September 30, 2022 was 0.67900%.
[50] The interest rate on these loans is subject to 3 Month BKBM, which as of September 30, 2022 was 3.64000%.
[51] The interest rate on these loans is subject to 1 Month NIBOR, which as of September 30, 2022 was 2.70000%.
[52] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2021 was 0.01500%.
[53] The interest rate on these loans is subject to 3 Month SARON, which as of September 30, 2022 was 0.43653%.
[54] 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.
[55] 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 & Electric ("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.