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Unaudited Consolidated Schedule of Investments - Schedule Of Investments (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 2,488,715  
Fair value at ending balance $ 2,527,537 $ 2,488,715
Investment, interest rate, paid in kind 3.30% [1],[2],[3],[4] 3.30% [5],[6],[7],[8]
Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 9.10% [3],[9],[10],[11],[12] 9.10% [7],[13],[14],[15],[16]
Sierra Senior Loan Strategy JV I, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 89.01% [3],[9],[11],[12],[17] 89.01% [7],[13],[15],[16],[18]
Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 16.00% [9],[11],[12],[19] 16.00% [13],[15],[16],[20]
Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 20.00% [3],[9],[11],[12],[19] 20.00% [7],[13],[15],[16],[20]
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 [21] $ 0 $ 0
Gross Additions [21],[22]   41
Gross Reductions [21],[23]   (41)
Amount of Realized Gain (Loss) [21]   (418)
Amount of Unrealized Gain (Loss) [21]   418
Fair value at ending balance [21]   0
Amount of Interest or Dividends Credited to Income [21],[24]   $ 67
Interest   5.00%
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 0 $ 1,263
Gross Additions [21],[22]   14
Gross Reductions [21],[23]   (1,156)
Amount of Realized Gain (Loss) [21]   (357)
Amount of Unrealized Gain (Loss) [21]   236
Fair value at ending balance [21]   0
Amount of Interest or Dividends Credited to Income [21],[24]   $ 127
Interest   5.00%
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 0 $ 0
Gross Additions [21],[22]   0
Gross Reductions [21],[23]   0
Amount of Realized Gain (Loss) [21]   0
Amount of Unrealized Gain (Loss) [21]   0
Fair value at ending balance [21]   0
Amount of Interest or Dividends Credited to Income [21],[24]   $ 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 [6],[8],[25] 7,124  
Fair value at ending balance $ 7,121 [2],[4],[26] $ 7,124 [6],[8],[25]
Interest 4.75% [2],[4],[26] 5.00% [6],[8],[25]
Interest 10.20% [2],[4],[26] 10.40% [6],[8],[25]
Investment, Identifier [Axis]: A.T. Holdings II LTD, Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8] $ 11,688  
Fair value at ending balance $ 11,150 [3],[4] $ 11,688 [7],[8]
Interest 14.30% [3],[4] 14.30% [7],[8]
Investment, Identifier [Axis]: AD Bidco, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ 9,833  
Interest [2],[4],[10],[27] 6.25%  
Interest [2],[4],[10],[27] 11.60%  
Investment, Identifier [Axis]: AD Bidco, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ (33)  
Interest [2],[4],[10],[27] 6.25%  
Interest [2],[4],[10],[27] 11.60%  
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 [5],[6],[7],[8] $ 5,392  
Fair value at ending balance $ 5,821 [2],[3],[4],[27] $ 5,392 [5],[6],[7],[8]
Interest 9.25% [2],[3],[4],[27] 9.25% [5],[6],[7],[8]
Interest 14.60% [2],[3],[4],[27] 14.60% [5],[6],[7],[8]
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 [8],[20] $ 537  
Fair value at ending balance $ 537 [4],[19] $ 537 [8],[20]
Investment owned, balance (in shares) 348.68 [4],[9],[11],[12],[19] 348.68 [8],[13],[15],[16],[20]
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 [6],[8],[28] $ 6,402  
Fair value at ending balance $ 6,424 [2],[4],[29] $ 6,402 [6],[8],[28]
Interest 7.50% [2],[4],[29] 7.50% [6],[8],[28]
Interest 12.90% [2],[4],[29] 13.00% [6],[8],[28]
Investment, Identifier [Axis]: AMMC CLO 23, Ltd. Series 2020-23A, Multi-Sector Holdings, Subordinated Structured Notes 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[18],[20] $ 2,468  
Fair value at ending balance 2,489 [3],[17],[19] $ 2,468 [7],[18],[20]
Investment, Identifier [Axis]: AMMC CLO 23, Ltd. Series 2020-23A, Multi-Sector Holdings, Subordinated Structured Notes 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[18] 1,476  
Fair value at ending balance 1,462 [3],[17] 1,476 [7],[18]
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 [6],[7],[8],[30] 2,505  
Fair value at ending balance $ 2,454 [1],[2],[3],[4] $ 2,505 [6],[7],[8],[30]
Interest 5.45% [1],[2],[3],[4] 5.50% [6],[7],[8],[30]
Interest 9.40% [1],[2],[3],[4] 9.40% [6],[7],[8],[30]
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 [6],[7],[8],[31] $ 2,086  
Fair value at ending balance $ 2,011 [2],[3],[4],[32] $ 2,086 [6],[7],[8],[31]
Interest 7.25% [2],[3],[4],[32] 7.25% [6],[7],[8],[31]
Interest 11.80% [2],[3],[4],[32] 11.60% [6],[7],[8],[31]
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 [5],[6],[8] $ 19,938  
Fair value at ending balance $ 20,000 [2],[4],[27] $ 19,938 [5],[6],[8]
Interest 7.50% [2],[4],[27] 7.50% [5],[6],[8]
Interest 12.90% [2],[4],[27] 13.00% [5],[6],[8]
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] $ 703  
Fair value at ending balance $ 753 [4] $ 703 [8]
Investment owned, balance (in shares) 25,718.2 [4],[9],[11],[12] 25,718.2 [8],[13],[15],[16]
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 [6],[8],[28] $ 9,035  
Fair value at ending balance $ 8,739 [2],[4],[29] $ 9,035 [6],[8],[28]
Interest 4.85% [2],[4],[29] 4.75% [6],[8],[28]
Interest 10.20% [2],[4],[29] 10.10% [6],[8],[28]
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ (9)  
Fair value at ending balance $ 0 [2],[4],[10],[29] $ (9) [6],[8],[14],[28]
Interest 4.75% [2],[4],[10],[29] 4.75% [6],[8],[14],[28]
Interest 10.10% [2],[4],[10],[29] 10.10% [6],[8],[14],[28]
Investment, Identifier [Axis]: ATL II MRO Holdings Inc, Transportation, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 8,250  
Fair value at ending balance $ 8,105 [2],[4],[10],[27] $ 8,250 [5],[6],[8]
Interest 5.75% [2],[4],[10],[27] 5.50% [5],[6],[8]
Interest 11.10% [2],[4],[10],[27] 10.90% [5],[6],[8]
Investment, Identifier [Axis]: ATL II MRO Holdings Inc, Transportation, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 0  
Fair value at ending balance $ (42) [2],[4],[10],[27] $ 0 [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 5.50% [5],[6],[8],[14]
Interest 11.10% [2],[4],[10],[27] 10.90% [5],[6],[8],[14]
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 ending balance $ 6,836  
Interest 5.00%  
Investment, interest rate, paid in kind 10.00%  
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 $ 6,332  
Fair value at ending balance   $ 6,332
Interest   5.00%
Investment, interest rate, paid in kind   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 [8],[20] 5,858  
Fair value at ending balance $ 5,979 [4],[19] $ 5,858 [8],[20]
Investment owned, balance (in shares) 5,000 [4],[9],[11],[12],[19] 5,000 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class B Convertible Preferred Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 1,950  
Fair value at ending balance $ 2,031 [4],[19] $ 1,950 [8],[20]
Investment owned, balance (in shares) 1,651 [4],[9],[11],[12],[19] 1,651 [8],[13],[15],[16],[20]
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 [6],[7],[8],[25] $ 2,461  
Fair value at ending balance $ 2,480 [2],[3],[4],[26] $ 2,461 [6],[7],[8],[25]
Interest 6.50% [2],[3],[4],[26] 6.25% [6],[7],[8],[25]
Interest 11.60% [2],[3],[4],[26] 11.60% [6],[7],[8],[25]
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 [8],[20] $ 512  
Fair value at ending balance $ 429 [4],[19] $ 512 [8],[20]
Investment owned, balance (in shares) 437,623.3 [4],[9],[11],[12],[19] 437,623.3 [8],[13],[15],[16],[20]
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 [5],[6],[8] $ 11,768  
Fair value at ending balance $ 11,816 [2],[4],[27] $ 11,768 [5],[6],[8]
Interest 5.25% [2],[4],[27] 5.25% [5],[6],[8]
Interest 10.70% [2],[4],[27] 10.80% [5],[6],[8]
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 [5],[6],[8],[14] $ 1,602  
Fair value at ending balance $ 1,784 [2],[4],[10],[27] $ 1,602 [5],[6],[8],[14]
Interest 5.25% [2],[4],[10],[27] 5.25% [5],[6],[8],[14]
Interest 10.70% [2],[4],[10],[27] 10.80% [5],[6],[8],[14]
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 [6],[7],[8],[30] $ 7,226  
Fair value at ending balance $ 6,772 [1],[2],[3],[4] $ 7,226 [6],[7],[8],[30]
Interest 4.65% [1],[2],[3],[4] 4.65% [6],[7],[8],[30]
Interest 8.60% [1],[2],[3],[4] 8.60% [6],[7],[8],[30]
Investment, interest rate, paid in kind 2.30% [1],[2],[3],[4] 2.30% [6],[7],[8],[30]
Investment, Identifier [Axis]: Adhefin International, Industrial Other, First Lien Senior Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[30] $ 1,778  
Fair value at ending balance $ 1,755 [1],[2],[3],[4],[10] $ 1,778 [6],[7],[8],[14],[30]
Interest 6.50% [1],[2],[3],[4],[10] 6.50% [6],[7],[8],[14],[30]
Interest 10.40% [1],[2],[3],[4],[10] 10.40% [6],[7],[8],[14],[30]
Investment, Identifier [Axis]: Adhefin International, Industrial Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[30] $ 300  
Fair value at ending balance $ 294 [1],[2],[3],[4] $ 300 [6],[7],[8],[30]
Interest 10.50% [1],[2],[3],[4] 10.50% [6],[7],[8],[30]
Investment, interest rate, paid in kind 14.40% [1],[2],[3],[4] 14.40% [6],[7],[8],[30]
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 [8],[20] $ 697  
Fair value at ending balance $ 697 [4],[19] $ 697 [8],[20]
Investment owned, balance (in shares) 8,717.76 [4],[9],[11],[12],[19] 8,717.76 [8],[13],[15],[16],[20]
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 [8],[20] $ 180  
Fair value at ending balance $ 180 [4],[19] $ 180 [8],[20]
Investment owned, balance (in shares) 2,248.46 [4],[9],[11],[12],[19] 2,248.46 [8],[13],[15],[16],[20]
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 [8],[20] $ 0  
Fair value at ending balance $ 0 [4],[19] $ 0 [8],[20]
Investment owned, balance (in shares) 8,717.76 [4],[9],[11],[12],[19] 8,717.76 [8],[13],[15],[16],[20]
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 [8],[20] $ 0  
Fair value at ending balance $ 0 [4],[19] $ 0 [8],[20]
Investment owned, balance (in shares) 2,248.46 [4],[9],[11],[12],[19] 2,248.46 [8],[13],[15],[16],[20]
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 $ 3,587  
Fair value at ending balance $ 3,590 $ 3,587
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 [5],[6],[8] $ 7,633  
Fair value at ending balance $ 7,705 [2],[4],[27] $ 7,633 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.30% [2],[4],[27] 10.30% [5],[6],[8]
Investment, Identifier [Axis]: Air Comm Corporation, LLC, 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 [5],[6],[8] $ 1,296  
Fair value at ending balance $ 1,289 [2],[4],[27] $ 1,296 [5],[6],[8]
Interest 6.25% [2],[4],[27] 6.25% [5],[6],[8]
Interest 11.70% [2],[4],[27] 11.70% [5],[6],[8]
Investment, Identifier [Axis]: AirX Climate Solutions, Inc,Diversified Manufacturing, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 3,226  
Fair value at ending balance $ 3,233 [2],[4],[10],[27] $ 3,226 [5],[6],[8],[14]
Interest 6.25% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.70% [2],[4],[10],[27] 11.70% [5],[6],[8],[14]
Investment, Identifier [Axis]: AirX Climate Solutions, Inc,Diversified Manufacturing,Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (12)  
Fair value at ending balance $ 73 [2],[4],[10],[27] $ (12) [5],[6],[8],[14]
Interest 6.25% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.70% [2],[4],[10],[27] 11.70% [5],[6],[8],[14]
Investment, Identifier [Axis]: AlliA Insurance Brokers NV, Insurance, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[30] $ 3,443  
Fair value at ending balance $ 3,469 [1],[2],[3],[4],[10] $ 3,443 [6],[7],[8],[14],[30]
Interest 6.00% [1],[2],[3],[4],[10] 6.25% [6],[7],[8],[14],[30]
Interest 9.90% [1],[2],[3],[4],[10] 10.20% [6],[7],[8],[14],[30]
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 [5],[6],[8],[18] $ 22,792  
Fair value at ending balance $ 22,792 [2],[4],[17],[27] $ 22,792 [5],[6],[8],[18]
Interest 6.00% [2],[4],[17],[27] 6.00% [5],[6],[8],[18]
Interest 11.50% [2],[4],[17],[27] 11.50% [5],[6],[8],[18]
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 [7],[8],[20] $ 1,188  
Fair value at ending balance $ 1,177 [3],[4],[19] $ 1,188 [7],[8],[20]
Investment owned, balance (in shares) 93,165,208 [3],[4],[9],[11],[12],[19] 93,165,208 [7],[8],[13],[15],[16],[20]
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 [7],[8] $ 4,824  
Fair value at ending balance $ 4,841 [3],[4] $ 4,824 [7],[8]
Interest 2.00% [3],[4] 2.00% [7],[8]
Investment, interest rate, paid in kind 9.00% [3],[4] 9.00% [7],[8]
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Warrant    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8],[20] $ 529  
Fair value at ending balance $ 644 [3],[4],[19] $ 529 [7],[8],[20]
Investment owned, balance (in shares) 380,385 [3],[4],[9],[11],[12],[19] 380,385 [7],[8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Americo Chemicals Products, LLC, Chemicals, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 89  
Fair value at ending balance $ 93 [4],[19] $ 89 [8],[20]
Investment owned, balance (in shares) 88,110 [4],[9],[11],[12],[19] 88,110 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Americo Chemicals Products, LLC, Chemicals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[28] $ 1,920  
Fair value at ending balance $ 1,930 [2],[4],[29] $ 1,920 [6],[8],[28]
Interest 5.50% [2],[4],[29] 5.50% [6],[8],[28]
Interest 10.80% [2],[4],[29] 10.90% [6],[8],[28]
Investment, Identifier [Axis]: Americo Chemicals Products, LLC, Chemicals, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ (4)  
Fair value at ending balance $ 0 [2],[4],[10],[29] $ (4) [6],[8],[14],[28]
Interest 5.50% [2],[4],[10],[29] 5.50% [6],[8],[14],[28]
Interest 10.80% [2],[4],[10],[29] 10.90% [6],[8],[14],[28]
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 [5],[6],[8] $ 2,988  
Fair value at ending balance $ 2,945 [2],[4],[27] $ 2,988 [5],[6],[8]
Interest 5.75% [2],[4],[27] 5.50% [5],[6],[8]
Interest 11.10% [2],[4],[27] 11.40% [5],[6],[8]
Investment, Identifier [Axis]: Amtech LLC, Technology, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 3,587  
Interest [2],[4],[27] 5.75%  
Interest [2],[4],[27] 11.10%  
Investment, Identifier [Axis]: Amtech LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 242  
Fair value at ending balance $ (19) [2],[4],[10],[27] $ 242 [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 5.50% [5],[6],[8],[14]
Interest 11.10% [2],[4],[10],[27] 11.40% [5],[6],[8],[14]
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 [6],[7],[8],[30] $ 3,173  
Fair value at ending balance $ 3,109 [1],[2],[3],[4] $ 3,173 [6],[7],[8],[30]
Interest 6.25% [1],[2],[3],[4] 6.25% [6],[7],[8],[30]
Interest 10.20% [1],[2],[3],[4] 10.20% [6],[7],[8],[30]
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 [6],[7],[8],[30] $ 958  
Fair value at ending balance $ 938 [1],[2],[3],[4] $ 958 [6],[7],[8],[30]
Interest 6.25% [1],[2],[3],[4] 6.25% [6],[7],[8],[30]
Interest 10.20% [1],[2],[3],[4] 10.20% [6],[7],[8],[30]
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 [6],[7],[8],[30] $ 1,678  
Fair value at ending balance $ 1,650 [1],[2],[3],[4] $ 1,678 [6],[7],[8],[30]
Interest 7.00% [1],[2],[3],[4] 7.00% [6],[7],[8],[30]
Interest 11.10% [1],[2],[3],[4] 11.00% [6],[7],[8],[30]
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 [5],[6],[7],[8] $ 1,002  
Fair value at ending balance $ 1,004 [3],[4],[27],[32] $ 1,002 [5],[6],[7],[8]
Interest 6.25% [3],[4],[27],[32] 6.25% [5],[6],[7],[8]
Interest 11.60% [3],[4],[27],[32] 11.90% [5],[6],[7],[8]
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 [6],[8],[33] $ 9,404  
Fair value at ending balance $ 859 [4],[10] $ 9,404 [6],[8],[33]
Investment, interest rate, paid in kind 10.00% [4],[10] 8.00% [6],[8],[33]
Investment, Identifier [Axis]: Anju Software, Inc. Application Software, Super Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14] $ 817  
Fair value at ending balance $ 2,717 [4],[34] $ 817 [6],[8],[14]
Investment, interest rate, paid in kind 8.00% [4],[34] 10.00% [6],[8],[14]
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 [6],[7],[8],[35] $ 1,858  
Fair value at ending balance $ 1,841 [2],[3],[4],[36] $ 1,858 [6],[7],[8],[35]
Interest 5.75% [2],[3],[4],[36] 5.75% [6],[7],[8],[35]
Interest 10.90% [2],[3],[4],[36] 11.10% [6],[7],[8],[35]
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[3],[4],[36] $ 1,387  
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, First Lien Senior Secured Term Loan1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[35] $ 1,358  
Fair value at ending balance [6],[7],[8],[35]   $ 1,358
Interest 6.50% [2],[3],[4],[36] 6.50% [6],[7],[8],[35]
Interest 11.70% [2],[3],[4],[36] 11.70% [6],[7],[8],[35]
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 [7],[8] $ 285  
Fair value at ending balance $ 301 [3],[4] $ 285 [7],[8]
Investment, interest rate, paid in kind 8.00% [3],[4] 8.00% [7],[8]
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 [7],[18] $ 5,885  
Fair value at ending balance 5,100 [3],[17] $ 5,885 [7],[18]
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 [7],[8],[20] 0  
Fair value at ending balance $ 0 [3],[4],[19] $ 0 [7],[8],[20]
Investment owned, balance (in shares) 48 [3],[4],[9],[11],[12],[19] 48 [7],[8],[13],[15],[16],[20]
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 [6],[7],[8],[37] $ 1,982  
Fair value at ending balance $ 2,033 [2],[3],[4],[38] $ 1,982 [6],[7],[8],[37]
Interest 6.50% [2],[3],[4],[38] 6.50% [6],[7],[8],[37]
Interest 10.40% [2],[3],[4],[38] 10.40% [6],[7],[8],[37]
Investment, interest rate, paid in kind 1.50% [2],[3],[4],[38] 1.50% [6],[7],[8],[37]
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 [7],[8],[20] $ 4  
Fair value at ending balance $ 4 [3],[4],[19] $ 4 [7],[8],[20]
Investment owned, balance (in shares) 13 [3],[4],[9],[11],[12],[19] 13 [7],[8],[13],[15],[16],[20]
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 [6],[7],[8],[35] $ 3,621  
Fair value at ending balance $ 3,614 [2],[3],[4],[36] $ 3,621 [6],[7],[8],[35]
Interest 5.75% [2],[3],[4],[36] 5.50% [6],[7],[8],[35]
Interest 10.90% [2],[3],[4],[36] 10.70% [6],[7],[8],[35]
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 [6],[7],[8],[14],[39] $ 5,839  
Fair value at ending balance $ 5,846 [2],[3],[4],[10] $ 5,839 [6],[7],[8],[14],[39]
Interest 6.00% [2],[3],[4],[10] 6.00% [6],[7],[8],[14],[39]
Interest 11.20% [2],[3],[4],[10] 11.20% [6],[7],[8],[14],[39]
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 [6],[7],[8],[39] $ 1,706  
Fair value at ending balance $ 1,723 [2],[3],[4],[40] $ 1,706 [6],[7],[8],[39]
Interest 10.50% [2],[3],[4],[40] 10.50% [6],[7],[8],[39]
Investment, interest rate, paid in kind 15.70% [2],[3],[4],[40] 15.70% [6],[7],[8],[39]
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 [6],[7],[8],[14],[30] $ 3,791  
Fair value at ending balance $ 3,717 [1],[2],[3],[4],[10] $ 3,791 [6],[7],[8],[14],[30]
Interest 5.75% [1],[2],[3],[4],[10] 5.75% [6],[7],[8],[14],[30]
Interest 9.60% [1],[2],[3],[4],[10] 9.70% [6],[7],[8],[14],[30]
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 [5],[6],[8] $ 8,993  
Fair value at ending balance $ 9,015 [2],[4],[27] $ 8,993 [5],[6],[8]
Interest 4.75% [2],[4],[27] 4.75% [5],[6],[8]
Interest 10.20% [2],[4],[27] 10.20% [5],[6],[8]
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 [6],[7],[8],[30] $ 6,304  
Fair value at ending balance $ 6,181 [1],[2],[3],[4] $ 6,304 [6],[7],[8],[30]
Interest 6.50% [1],[2],[3],[4] 6.50% [6],[7],[8],[30]
Interest 10.40% [1],[2],[3],[4] 10.40% [6],[7],[8],[30]
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 [7],[8],[20] $ 0  
Fair value at ending balance $ 0 [3],[4],[19] $ 0 [7],[8],[20]
Investment owned, balance (in shares) 464 [3],[4],[9],[11],[12],[19] 464 [7],[8],[13],[15],[16],[20]
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 [7],[8] $ 42  
Fair value at ending balance $ 46 [3],[4] $ 42 [7],[8]
Investment owned, balance (in shares) 41,560 [3],[4],[9],[11],[12] 41,560 [7],[8],[13],[15],[16]
Investment, interest rate, paid in kind 10.00% [3],[4] 10.00% [7],[8]
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 [5],[6],[7],[8] $ 125  
Fair value at ending balance $ 307 [1],[2],[3],[4] $ 125 [5],[6],[7],[8]
Interest 4.00% [1],[2],[3],[4] 4.00% [5],[6],[7],[8]
Interest 7.90% [1],[2],[3],[4] 9.30% [5],[6],[7],[8]
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 [6],[7],[8],[30] $ 307  
Fair value at ending balance $ 1,557 [1],[2],[3],[4] $ 307 [6],[7],[8],[30]
Interest 6.75% [1],[2],[3],[4] 4.00% [6],[7],[8],[30]
Interest 10.70% [1],[2],[3],[4] 7.60% [6],[7],[8],[30]
Investment, interest rate, paid in kind [6],[7],[8],[30]   3.30%
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 [6],[7],[8],[30] $ 1,408  
Fair value at ending balance $ 128 [2],[3],[4],[27] $ 1,408 [6],[7],[8],[30]
Interest 4.00% [2],[3],[4],[27] 6.75% [6],[7],[8],[30]
Interest 9.30% [2],[3],[4],[27] 10.70% [6],[7],[8],[30]
Investment, interest rate, paid in kind [2],[3],[4],[27] 3.30%  
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 4    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[35] $ 1,632  
Fair value at ending balance $ 1,641 [2],[3],[4],[10],[36] $ 1,632 [6],[7],[8],[35]
Interest 4.00% [2],[3],[4],[10],[36] 4.00% [6],[7],[8],[35]
Interest 9.10% [2],[3],[4],[10],[36] 8.90% [6],[7],[8],[35]
Investment, interest rate, paid in kind 3.30% [2],[3],[4],[10],[36] 3.30% [6],[7],[8],[35]
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 5    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[35] $ (28)  
Fair value at ending balance [6],[7],[8],[14],[35]   $ (28)
Interest [6],[7],[8],[14],[35]   6.50%
Interest [6],[7],[8],[14],[35]   11.40%
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 [7],[8] 42  
Fair value at ending balance $ 46 [3],[4] $ 42 [7],[8]
Investment owned, balance (in shares) 41,560 [3],[4],[9],[11],[12] 41,560 [7],[8],[13],[15],[16]
Investment, interest rate, paid in kind 10.00% [3],[4] 10.00% [7],[8]
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Second Lien Term Loan Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8] $ 734  
Fair value at ending balance $ 758 [3],[4] $ 734 [7],[8]
Investment, interest rate, paid in kind 10.50% [3],[4] 10.50% [7],[8]
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC ), Air Freight & Logistics, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 3,790  
Fair value at ending balance $ 3,750 [2],[4],[27] $ 3,790 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 11.40% [2],[4],[27] 10.90% [5],[6],[8]
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC ), Air Freight & Logistics, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 4,709  
Fair value at ending balance $ 4,672 [2],[4],[27] $ 4,709 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 11.40% [2],[4],[27] 10.90% [5],[6],[8]
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 [6],[7],[8],[14],[35] $ 2,380  
Fair value at ending balance $ 2,449 [2],[3],[4],[10],[36] $ 2,380 [6],[7],[8],[14],[35]
Interest 5.25% [2],[3],[4],[10],[36] 5.25% [6],[7],[8],[14],[35]
Interest 10.40% [2],[3],[4],[10],[36] 10.40% [6],[7],[8],[14],[35]
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 [6],[7],[8],[37] $ 1,427  
Fair value at ending balance $ 1,400 [2],[3],[4],[38] $ 1,427 [6],[7],[8],[37]
Interest 6.25% [2],[3],[4],[38] 7.25% [6],[7],[8],[37]
Interest 10.20% [2],[3],[4],[38] 11.30% [6],[7],[8],[37]
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 [6],[7],[8],[39] $ 788  
Fair value at ending balance $ 784 [2],[3],[4],[40] $ 788 [6],[7],[8],[39]
Interest 6.25% [2],[3],[4],[40] 7.25% [6],[7],[8],[39]
Interest 11.40% [2],[3],[4],[40] 12.40% [6],[7],[8],[39]
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 [6],[7],[8],[14],[41] $ 2,190  
Fair value at ending balance $ 2,011 [2],[3],[4],[10],[42] $ 2,190 [6],[7],[8],[14],[41]
Interest 5.00% [2],[3],[4],[10],[42] 5.00% [6],[7],[8],[14],[41]
Interest 9.40% [2],[3],[4],[10],[42] 9.40% [6],[7],[8],[14],[41]
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 [6],[8],[18],[28] $ 29,162  
Fair value at ending balance $ 29,162 [2],[4],[17],[29] $ 29,162 [6],[8],[18],[28]
Interest 8.50% [2],[4],[17],[29] 8.50% [6],[8],[18],[28]
Interest 13.80% [2],[4],[17],[29] 14.00% [6],[8],[18],[28]
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 [8],[20] $ 288  
Fair value at ending balance $ 300 [4],[19] $ 288 [8],[20]
Investment owned, balance (in shares) 192,307.7 [4],[9],[11],[12],[19] 192,307.7 [8],[13],[15],[16],[20]
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 [5],[6],[8],[14] $ 4,809  
Fair value at ending balance $ 4,819 [2],[4],[10],[27] $ 4,809 [5],[6],[8],[14]
Interest 5.25% [2],[4],[10],[27] 5.25% [5],[6],[8],[14]
Interest 10.70% [2],[4],[10],[27] 10.70% [5],[6],[8],[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 [5],[6],[8],[14] $ (3)  
Fair value at ending balance $ 0 [2],[4],[10],[27] $ (3) [5],[6],[8],[14]
Interest 5.25% [2],[4],[10],[27] 5.25% [5],[6],[8],[14]
Interest 10.70% [2],[4],[10],[27] 10.70% [5],[6],[8],[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 [8] $ 1,529  
Fair value at ending balance $ 1,627 [4] $ 1,529 [8]
Investment, interest rate, paid in kind 12.00% [4] 12.00% [8]
Investment, Identifier [Axis]: BNI Global, LLC, Other Industrial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[43] $ 9,707  
Interest [2],[4],[43] 5.75%  
Interest [2],[4],[43] 9.60%  
Investment, Identifier [Axis]: BPG Holdings IV Corp, Capital Goods, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 13,401  
Fair value at ending balance $ 13,367 [2],[4],[27] $ 13,401 [5],[6],[8]
Interest 6.00% [2],[4],[27] 6.00% [5],[6],[8]
Interest 11.30% [2],[4],[27] 11.40% [5],[6],[8]
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 [6],[8],[30] $ 9,541  
Fair value at ending balance $ 9,679 [1],[2],[4] $ 9,541 [6],[8],[30]
Interest 9.50% [1],[2],[4] 9.50% [6],[8],[30]
Interest 13.40% [1],[2],[4] 13.40% [6],[8],[30]
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 [6],[7],[8],[37] $ 3,314  
Fair value at ending balance $ 3,221 [2],[3],[4],[38] $ 3,314 [6],[7],[8],[37]
Interest 4.75% [2],[3],[4],[38] 4.75% [6],[7],[8],[37]
Interest 8.60% [2],[3],[4],[38] 8.60% [6],[7],[8],[37]
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 [6],[7],[8],[44] $ 1,096  
Fair value at ending balance $ 958 [2],[3],[4],[45] $ 1,096 [6],[7],[8],[44]
Interest 5.25% [2],[3],[4],[45] 5.25% [6],[7],[8],[44]
Interest 9.30% [2],[3],[4],[45] 9.30% [6],[7],[8],[44]
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 [5],[6],[8],[14] $ 2,944  
Fair value at ending balance $ 2,916 [2],[4],[10],[27] $ 2,944 [5],[6],[8],[14]
Interest 4.50% [2],[4],[10],[27] 4.50% [5],[6],[8],[14]
Interest 9.90% [2],[4],[10],[27] 10.00% [5],[6],[8],[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 [6],[7],[8],[37] $ 7,672  
Fair value at ending balance $ 7,518 [2],[3],[4],[38] $ 7,672 [6],[7],[8],[37]
Interest 6.45% [2],[3],[4],[38] 6.50% [6],[7],[8],[37]
Interest 10.50% [2],[3],[4],[38] 10.50% [6],[7],[8],[37]
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 [6],[7],[8],[25] $ 2,020  
Fair value at ending balance $ 2,355 [2],[3],[4],[26] $ 2,020 [6],[7],[8],[25]
Interest 5.75% [2],[3],[4],[26] 5.50% [6],[7],[8],[25]
Interest 11.20% [2],[3],[4],[26] 10.80% [6],[7],[8],[25]
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[7],[8] $ 353  
Fair value at ending balance [5],[6],[7],[8]   $ 353
Interest [5],[6],[7],[8]   5.75%
Interest [5],[6],[7],[8]   11.10%
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 [6],[7],[8],[35] 801  
Fair value at ending balance $ 788 [2],[3],[4],[36] $ 801 [6],[7],[8],[35]
Interest 5.75% [2],[3],[4],[36] 5.75% [6],[7],[8],[35]
Interest 10.90% [2],[3],[4],[36] 11.10% [6],[7],[8],[35]
Investment, Identifier [Axis]: Biolam Group, Consumer Non-cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[30] $ 2,266  
Fair value at ending balance $ 2,028 [1],[2],[3],[4],[10] $ 2,266 [6],[7],[8],[14],[30]
Interest 4.25% [1],[2],[3],[4],[10] 4.25% [6],[7],[8],[14],[30]
Interest 5.50% [1],[2],[3],[4],[10] 5.50% [6],[7],[8],[14],[30]
Investment, interest rate, paid in kind 2.80% [1],[2],[3],[4],[10] 2.80% [6],[7],[8],[14],[30]
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 [46] $ 7,166 $ 5,647
Gross Additions [46],[47] 141 1,330
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] 0 189
Fair value at ending balance [46] 7,307 7,166
Amount of Interest or Dividends Credited to Income [46],[49] $ 266 $ 1,401
Interest 14.40% 14.40%
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 [46] $ 4,869 $ 9,147
Gross Additions [46],[47] 0 0
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] (2,369) (4,278)
Fair value at ending balance [46] 2,500 4,869
Amount of Interest or Dividends Credited to Income [46],[49] $ 0 $ 0
Investment, interest rate, paid in kind 10.00% 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 [6],[8],[18],[28] $ 7,166  
Fair value at ending balance $ 2,500 [2],[4],[17],[29] $ 7,166 [6],[8],[18],[28]
Investment, interest rate, paid in kind 10.00% [2],[4],[17],[29] 14.40% [6],[8],[18],[28]
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 [8],[18],[33] $ 4,869  
Fair value at ending balance $ 7,307 [4],[17],[34] $ 4,869 [8],[18],[33]
Investment, interest rate, paid in kind 14.40% [4],[17],[34] 10.00% [8],[18],[33]
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 [8],[18],[20] $ 0  
Fair value at ending balance $ 0 [4],[17],[19] $ 0 [8],[18],[20]
Investment owned, balance (in shares) 44.6 [4],[9],[11],[12],[17],[19] 44.6 [8],[13],[15],[16],[18],[20]
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 [46] $ 0 $ 0
Gross Additions [46],[47] 0 0
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] 0 0
Fair value at ending balance [46] 0 0
Amount of Interest or Dividends Credited to Income [46],[49] $ 0 $ 0
Investment owned, balance (in shares) 44.6 44.6
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 [5],[6],[8],[14] $ 1,605  
Fair value at ending balance $ 3,947 [2],[4],[27] $ 1,605 [5],[6],[8],[14]
Interest 5.25% [2],[4],[27] 5.25% [5],[6],[8],[14]
Interest 10.70% [2],[4],[27] 10.70% [5],[6],[8],[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 $ 28,802  
Fair value at ending balance $ 27,984 $ 28,802
Interest 11.50% 11.50%
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Environmental Industries, Preferred Stock- Series A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] $ 15,003  
Fair value at ending balance $ 14,176 [4] $ 15,003 [8]
Investment owned, balance (in shares) 14,618 [4],[9],[11],[12] 14,618 [8],[13],[15],[16]
Investment, interest rate, paid in kind 7.00% [4] 7.00% [8]
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 [5],[6],[8] $ 4,540  
Fair value at ending balance $ 4,651 [2],[4],[27] $ 4,540 [5],[6],[8]
Interest 5.75% [2],[4],[27] 5.75% [5],[6],[8]
Interest 11.20% [2],[4],[27] 11.20% [5],[6],[8]
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 [8],[20] $ 930  
Fair value at ending balance $ 1,008 [4],[19] $ 930 [8],[20]
Investment owned, balance (in shares) 1,107,492.71 [4],[9],[11],[12],[19] 1,107,492.71 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 839  
Fair value at ending balance $ 1,051 [2],[4],[10],[27] $ 839 [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 11.20% [2],[4],[10],[27] 11.20% [5],[6],[8],[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 [8] $ 4,750  
Fair value at ending balance $ 5,000 [4] $ 4,750 [8]
Interest 8.00% [4] 8.00% [8]
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 [6],[7],[8],[14],[30] $ 2,250  
Fair value at ending balance $ 2,204 [1],[2],[3],[4],[10] $ 2,250 [6],[7],[8],[14],[30]
Interest 5.00% [1],[2],[3],[4],[10] 5.00% [6],[7],[8],[14],[30]
Interest 8.90% [1],[2],[3],[4],[10] 9.00% [6],[7],[8],[14],[30]
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 $ 610  
Fair value at ending balance   $ 610
Interest   8.40%
Investment, Identifier [Axis]: British Airways 2020-1 Class B Pass Through Trust, Structured Products, First Lien Senior Secured Bond    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance $ 590  
Interest 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 [6],[7],[8],[39] $ 14,403  
Fair value at ending balance $ 14,484 [2],[3],[4],[40] $ 14,403 [6],[7],[8],[39]
Interest 6.75% [2],[3],[4],[40] 7.00% [6],[7],[8],[39]
Interest 12.50% [2],[3],[4],[40] 11.90% [6],[7],[8],[39]
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 [5],[6],[8],[18] $ 2,596  
Fair value at ending balance $ 2,608 [2],[17],[27] $ 2,596 [5],[6],[8],[18]
Interest 4.00% [2],[17],[27] 4.00% [5],[6],[8],[18]
Interest 9.30% [2],[17],[27] 9.50% [5],[6],[8],[18]
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 [6],[8],[28] $ 5,954  
Fair value at ending balance $ 6,003 [2],[4],[29] $ 5,954 [6],[8],[28]
Interest 5.75% [2],[4],[29] 5.75% [6],[8],[28]
Interest 11.10% [2],[4],[29] 11.20% [6],[8],[28]
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 [8],[20] $ 462  
Fair value at ending balance $ 485 [4],[19] $ 462 [8],[20]
Investment owned, balance (in shares) 455 [4],[9],[11],[12],[19] 455 [8],[13],[15],[16],[20]
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 [6],[8],[28] $ 4,368  
Fair value at ending balance $ 4,482 [2],[4],[29] $ 4,368 [6],[8],[28]
Interest 9.00% [2],[4],[29] 9.00% [6],[8],[28]
Interest 14.40% [2],[4],[29] 14.40% [6],[8],[28]
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 [5],[6],[8] $ 4,636  
Fair value at ending balance $ 11,041 [2],[4],[27] $ 4,636 [5],[6],[8]
Interest 6.25% [2],[4],[27] 6.25% [5],[6],[8]
Interest 11.60% [2],[4],[27] 11.90% [5],[6],[8]
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 [5],[6],[8] $ 1,275  
Fair value at ending balance $ 1,333 [2],[4],[27] $ 1,275 [5],[6],[8]
Interest 6.25% [2],[4],[27] 6.25% [5],[6],[8]
Interest 11.60% [2],[4],[27] 11.90% [5],[6],[8]
Investment, Identifier [Axis]: CAi Software, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (61)  
Fair value at ending balance $ (50) [2],[4],[10],[27] $ (61) [5],[6],[8],[14]
Interest 6.25% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.60% [2],[4],[10],[27] 11.90% [5],[6],[8],[14]
Investment, Identifier [Axis]: CCFF Buyer, LLC, Food & Beverage, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[26] $ 3,693  
Interest [2],[4],[10],[26] 5.75%  
Interest [2],[4],[10],[26] 11.20%  
Investment, Identifier [Axis]: CCFF Buyer, LLC, Food & Beverage, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[19] $ 233  
Investment owned, balance (in shares) [4],[9],[11],[12],[19] 233  
Investment, Identifier [Axis]: CCFF Buyer, LLC, Food & Beverage, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[26] $ (21)  
Interest [2],[4],[10],[26] 5.75%  
Interest [2],[4],[10],[26] 11.20%  
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 12,968  
Fair value at ending balance $ 12,761 [2],[4],[27] $ 12,968 [5],[6],[8]
Interest 5.25% [2],[4],[27] 5.75% [5],[6],[8]
Interest 10.70% [2],[4],[27] 11.30% [5],[6],[8]
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 1,344  
Fair value at ending balance $ 1,340 [2],[4],[27] $ 1,344 [5],[6],[8]
Interest 5.25% [2],[4],[27] 5.75% [5],[6],[8]
Interest 10.70% [2],[4],[27] 11.30% [5],[6],[8]
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 [8],[20] $ 1,190  
Fair value at ending balance $ 1,244 [4],[19] $ 1,190 [8],[20]
Investment owned, balance (in shares) 657 [4],[9],[11],[12],[19] 657 [8],[13],[15],[16],[20]
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 [5],[6],[8],[14] $ (33)  
Fair value at ending balance $ (34) [2],[4],[10],[27] $ (33) [5],[6],[8],[14]
Interest 5.25% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 10.70% [2],[4],[10],[27] 11.30% [5],[6],[8],[14]
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 [5],[6],[8] $ 13,399  
Fair value at ending balance $ 13,309 [2],[4],[27] $ 13,399 [5],[6],[8]
Interest 4.75% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.20% [2],[4],[27] 10.20% [5],[6],[8]
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 [6],[8],[28] $ 3,742  
Fair value at ending balance $ 3,667 [2],[4],[29] $ 3,742 [6],[8],[28]
Interest 5.00% [2],[4],[29] 5.00% [6],[8],[28]
Interest 10.40% [2],[4],[29] 10.40% [6],[8],[28]
Investment, interest rate, paid in kind 0.30% [2],[4],[29] 0.30% [6],[8],[28]
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[28] $ 609  
Fair value at ending balance $ 595 [2],[4],[29] $ 609 [6],[8],[28]
Interest 5.00% [2],[4],[29] 5.00% [6],[8],[28]
Interest 10.40% [2],[4],[29] 10.40% [6],[8],[28]
Investment, interest rate, paid in kind 0.30% [2],[4],[29] 0.30% [6],[8],[28]
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 [8],[20] $ 59  
Fair value at ending balance $ 0 [4],[19] $ 59 [8],[20]
Investment owned, balance (in shares) 8,782 [4],[9],[11],[12],[19] 12,635 [8],[13],[15],[16],[20]
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 [6],[7],[8],[14],[50] $ 2,052  
Fair value at ending balance $ 2,033 [2],[3],[4],[10],[51] $ 2,052 [6],[7],[8],[14],[50]
Interest 5.25% [2],[3],[4],[10],[51] 5.25% [6],[7],[8],[14],[50]
Interest 10.20% [2],[3],[4],[10],[51] 10.50% [6],[7],[8],[14],[50]
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc., Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[18],[28] $ 4,684  
Fair value at ending balance $ 4,856 [2],[17],[29] $ 4,684 [6],[18],[28]
Interest 4.25% [2],[17],[29] 4.25% [6],[18],[28]
Interest 9.70% [2],[17],[29] 9.70% [6],[18],[28]
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, 2024 LIFO Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 3,750  
Interest [2],[4],[27] 10.00%  
Investment, interest rate, paid in kind [2],[4],[27] 15.30%  
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[19] $ 595  
Investment owned, balance (in shares) [4],[9],[11],[12],[19] 19,376  
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, Second Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 535  
Interest [2],[4],[27] 12.00%  
Investment, interest rate, paid in kind [2],[4],[27] 17.30%  
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, 2024 First Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 1,875  
Interest [2],[4],[27] 10.00%  
Investment, interest rate, paid in kind [2],[4],[27] 15.30%  
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Food & Beverage, First Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 715  
Interest [2],[4],[27] 10.00%  
Investment, interest rate, paid in kind [2],[4],[27] 15.30%  
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 [5],[6],[8] $ 2,759  
Fair value at ending balance $ 2,754 [2],[4],[27] $ 2,759 [5],[6],[8]
Interest 5.50% [2],[4],[27] 6.00% [5],[6],[8]
Interest 10.90% [2],[4],[27] 11.40% [5],[6],[8]
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 [8],[20] $ 289  
Fair value at ending balance $ 297 [4],[19] $ 289 [8],[20]
Investment owned, balance (in shares) 161,290.32 [4],[9],[11],[12],[19] 161,290.32 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class A Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[4],[19] $ 0  
Investment owned, balance (in shares) 500,000 [3],[4],[9],[11],[12],[19] 500,000 [7],[8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class C - Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[4],[19] $ 0  
Investment owned, balance (in shares) 74,712.64 [3],[4],[9],[11],[12],[19] 257,127.45 [7],[8],[13],[15],[16],[20]
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 [6],[7],[8],[52] $ 1,322  
Fair value at ending balance $ 1,100 [2],[3],[4],[53] $ 1,322 [6],[7],[8],[52]
Interest 3.50% [2],[3],[4],[53] 3.50% [6],[7],[8],[52]
Interest 9.00% [2],[3],[4],[53] 9.00% [6],[7],[8],[52]
Investment, interest rate, paid in kind 3.50% [2],[3],[4],[53] 3.50% [6],[7],[8],[52]
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 [5],[6],[7],[8] $ 4,240  
Fair value at ending balance $ 4,240 [2],[3],[4],[27] $ 4,240 [5],[6],[7],[8]
Interest 7.64% [2],[3],[4],[27] 7.64% [5],[6],[7],[8]
Interest 13.00% [2],[3],[4],[27] 14.00% [5],[6],[7],[8]
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 [7],[8],[20] $ 982  
Fair value at ending balance $ 1,016 [3],[4],[19] $ 982 [7],[8],[20]
Investment owned, balance (in shares) 681,818 [3],[4],[9],[11],[12],[19] 681,818 [7],[8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, LLC Units - Class X Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[4],[19] $ 0  
Investment owned, balance (in shares) 45,604 [3],[4],[9],[11],[12],[19] 45,604 [7],[8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Cascade Residential Services LLC, Electric, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (8)  
Fair value at ending balance $ (1) [2],[4],[10],[27] $ (8) [5],[6],[8],[14]
Interest 5.25% [2],[4],[10],[27] 10.40% [5],[6],[8],[14]
Interest 10.60% [2],[4],[10],[27] 5.00% [5],[6],[8],[14]
Investment, Identifier [Axis]: Cascade Residential Services LLC,Electric,First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 2,567  
Fair value at ending balance $ 3,144 [2],[4],[10],[27] $ 2,567 [5],[6],[8],[14]
Interest 5.25% [2],[4],[10],[27] 5.00% [5],[6],[8],[14]
Interest 10.60% [2],[4],[10],[27] 10.40% [5],[6],[8],[14]
Investment, Identifier [Axis]: Catawba River Limited, Finance Companies, Structured - Junior Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8],[14] $ 943  
Fair value at ending balance 3,636 [3],[4],[10] $ 943 [7],[8],[14]
Investment, Identifier [Axis]: Celebration Bidco, 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 [5],[8] 6,214  
Fair value at ending balance $ 6,214 [4],[27] $ 6,214 [5],[8]
Interest 8.00% [4],[27] 8.00% [5],[8]
Interest 13.30% [4],[27] 13.30% [5],[8]
Investment, Identifier [Axis]: Celebration Bidco, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] $ 12,177 $ 0
Gross Additions [21],[22] 0 12,177
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 2,292 0
Fair value at ending balance [21] 14,469 12,177
Amount of Interest or Dividends Credited to Income [21],[24] $ 0 $ 0
Investment owned, balance (in shares) 1,243,071 1,243,071
Investment, Identifier [Axis]: Celebration Bidco, LLC, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] $ 6,214 $ 0
Gross Additions [21],[22] 0 6,214
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 0 0
Fair value at ending balance [21] 6,214 6,214
Amount of Interest or Dividends Credited to Income [21],[24] $ 217 $ 0
Interest 8.00% 8.00%
Interest 13.30% 13.30%
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Diversified Financial Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[30] $ 3,144  
Fair value at ending balance $ 3,081 [1],[2],[3],[4] $ 3,144 [6],[7],[8],[30]
Interest 5.25% [1],[2],[3],[4] 5.25% [6],[7],[8],[30]
Interest 9.20% [1],[2],[3],[4] 9.20% [6],[7],[8],[30]
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 [6],[7],[8],[37] $ 3,307  
Fair value at ending balance $ 3,288 [2],[3],[4],[38] $ 3,307 [6],[7],[8],[37]
Interest 6.00% [2],[3],[4],[38] 6.00% [6],[7],[8],[37]
Interest 9.90% [2],[3],[4],[38] 10.10% [6],[7],[8],[37]
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 [5],[6],[8],[14] $ 6,602  
Fair value at ending balance $ 7,881 [2],[4],[10],[27] $ 6,602 [5],[6],[8],[14]
Interest 5.25% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 10.50% [2],[4],[10],[27] 11.30% [5],[6],[8],[14]
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 [5],[6],[8] $ 599  
Fair value at ending balance [5],[6],[8]   $ 599
Interest [5],[6],[8]   5.75%
Interest [5],[6],[8]   11.30%
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure ,LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Investment owned, balance (in shares) 2,407,825 [4],[9],[11],[12],[19] 2,407,825 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure ,LLC Units, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 12,177  
Fair value at ending balance $ 14,469 [4],[19] $ 12,177 [8],[20]
Investment owned, balance (in shares) 1,243,071 [4],[9],[11],[12],[19] 1,243,071 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] $ 6,868  
Fair value at ending balance $ 6,881 [4] $ 6,868 [8]
Interest 8.00% [4] 8.00% [8]
Investment, interest rate, paid in kind 10.00% [4] 10.00% [8]
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Hotel, Gaming & Leisure, Subordinated Term Loan2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] $ 15,649  
Fair value at ending balance 15,679 [4] $ 15,649 [8]
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 12,160 [8],[20] 0
Gross Additions [21],[22] 3,701 12,732
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 194 (572)
Fair value at ending balance [21] 16,055 [4],[19] 12,160 [8],[20]
Amount of Interest or Dividends Credited to Income [21],[24] $ 0 $ 0
Investment owned, balance (in shares) 2,407,825 2,407,825
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] $ 15,649 $ 0
Gross Additions [21],[22] 23 15,632
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 7 17
Fair value at ending balance [21] 15,679 15,649
Amount of Interest or Dividends Credited to Income [21],[24] $ 354 $ 715
Interest 8.00%  
Interest   8.00%
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] $ 6,868 $ 0
Gross Additions [21],[22] 8 6,879
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 5 (11)
Fair value at ending balance [21] 6,881 6,868
Amount of Interest or Dividends Credited to Income [21],[24] $ 190 $ 371
Investment, interest rate, paid in kind 10.00% 10.00%
Investment, Identifier [Axis]: Cobham Slip Rings SAS, Diversified Manufacturing, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[7],[8] $ 1,294  
Fair value at ending balance $ 1,303 [2],[4],[10],[27] $ 1,294 [5],[6],[7],[8]
Interest 6.25% [2],[4],[10],[27] 6.25% [5],[6],[7],[8]
Interest 11.60% [2],[4],[10],[27] 11.60% [5],[6],[7],[8]
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 [8],[20] $ 176  
Fair value at ending balance $ 177 [4],[19] $ 176 [8],[20]
Investment owned, balance (in shares) 33,324.69 [4],[9],[11],[12],[19] 33,324.69 [8],[13],[15],[16],[20]
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 [6],[8],[28] $ 13,345  
Fair value at ending balance $ 13,344 [2],[4],[29] $ 13,345 [6],[8],[28]
Interest 6.75% [2],[4],[29] 6.75% [6],[8],[28]
Interest 12.10% [2],[4],[29] 12.10% [6],[8],[28]
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 [8],[20] $ 142  
Fair value at ending balance $ 145 [4],[19] $ 142 [8],[20]
Investment owned, balance (in shares) 46,085.6 [4],[9],[11],[12],[19] 46,085.6 [8],[13],[15],[16],[20]
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 [8] $ 622  
Fair value at ending balance $ 621 [4] $ 622 [8]
Interest 11.00% [4] 11.00% [8]
Investment, interest rate, paid in kind 1.00% [4] 1.00% [8]
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 [5],[6],[8] $ 5,525  
Fair value at ending balance $ 5,507 [2],[4],[27] $ 5,525 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.40% [2],[4],[27] 10.40% [5],[6],[8]
Investment, Identifier [Axis]: Comply365, 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 [5],[6],[8] $ 12,997  
Fair value at ending balance $ 12,955 [2],[4],[27] $ 12,997 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.40% [2],[4],[27] 10.40% [5],[6],[8]
Investment, Identifier [Axis]: Comply365, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (22)  
Fair value at ending balance $ (20) [2],[4],[10],[27] $ (22) [5],[6],[8],[14]
Interest 5.00% [2],[4],[10],[27] 5.00% [5],[6],[8],[14]
Interest 10.40% [2],[4],[10],[27] 10.40% [5],[6],[8],[14]
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 [6],[7],[8],[30] $ 5,103  
Fair value at ending balance $ 5,029 [1],[2],[3],[4] $ 5,103 [6],[7],[8],[30]
Interest 5.25% [1],[2],[3],[4] 5.25% [6],[7],[8],[30]
Interest 9.20% [1],[2],[3],[4] 9.20% [6],[7],[8],[30]
Investment, Identifier [Axis]: Core Scientific, Inc., Technology Common Stock ($4,798,119 shares), N/A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[19] $ 16,985  
Investment owned, balance (in shares) [3],[9],[11],[12],[19] 4,798,119  
Investment, Identifier [Axis]: Core Scientific, Inc., Technology Warrants Jan '29 expiry ($41,585 warrants), N/A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[19] $ 47  
Investment owned, balance (in shares) [3],[9],[11],[12],[19] 41,585  
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 [7],[20] $ 133  
Fair value at ending balance [7],[20]   $ 133
Investment owned, balance (in shares) [7],[13],[15],[16],[20]   91,504
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, Equipment Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8],[33] 22,976  
Fair value at ending balance [7],[8],[33]   $ 22,976
Interest [7],[8],[33]   9.80%
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, Warrants Jan '27 expiry ($49,902 warrants), N/A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[19] $ 30  
Investment owned, balance (in shares) [3],[9],[11],[12],[19] 49,902  
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 [7],[8],[20] $ 211  
Fair value at ending balance $ 209 [3],[4],[19] $ 211 [7],[8],[20]
Investment owned, balance (in shares) 440 [3],[4],[9],[11],[12],[19] 440 [7],[8],[13],[15],[16],[20]
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 [7],[8],[20] $ 505  
Fair value at ending balance $ 461 [3],[4],[19] $ 505 [7],[8],[20]
Investment owned, balance (in shares) 191 [3],[4],[9],[11],[12],[19] 191 [7],[8],[13],[15],[16],[20]
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 [6],[7],[8],[14],[30] $ 4,659  
Fair value at ending balance $ 4,561 [1],[2],[3],[4],[10] $ 4,659 [6],[7],[8],[14],[30]
Interest 3.25% [1],[2],[3],[4],[10] 3.25% [6],[7],[8],[14],[30]
Interest 6.30% [1],[2],[3],[4],[10] 6.30% [6],[7],[8],[14],[30]
Investment, interest rate, paid in kind 3.40% [1],[2],[3],[4],[10] 3.40% [6],[7],[8],[14],[30]
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ 5,944  
Fair value at ending balance $ 6,896 [2],[4],[10],[29] $ 5,944 [6],[8],[14],[28]
Interest 5.00% [2],[4],[10],[29] 5.50% [6],[8],[14],[28]
Interest 10.30% [2],[4],[10],[29] 10.80% [6],[8],[14],[28]
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ 90  
Fair value at ending balance $ (6) [2],[4],[10],[29] $ 90 [6],[8],[14],[28]
Interest 5.00% [2],[4],[10],[29] 5.50% [6],[8],[14],[28]
Interest 10.30% [2],[4],[10],[29] 10.80% [6],[8],[14],[28]
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 1,873  
Fair value at ending balance $ 1,872 [2],[4],[27] $ 1,873 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.75% [5],[6],[8]
Interest 10.90% [2],[4],[27] 11.10% [5],[6],[8]
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 96  
Fair value at ending balance $ 97 [4],[19] $ 96 [8],[20]
Investment owned, balance (in shares) 96,153.85 [4],[9],[11],[12],[19] 96,153.85 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (7)  
Fair value at ending balance $ (6) [2],[4],[10],[27] $ (7) [5],[6],[8],[14]
Interest 5.50% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 10.90% [2],[4],[10],[27] 11.10% [5],[6],[8],[14]
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 [8],[20] $ 41  
Fair value at ending balance $ 48 [4],[19] $ 41 [8],[20]
Investment owned, balance (in shares) 1,280.8 [4],[9],[11],[12],[19] 1,280.8 [8],[20]
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 [6],[8],[28] $ 1,638  
Fair value at ending balance $ 1,626 [2],[4],[29] $ 1,638 [6],[8],[28]
Interest 6.25% [2],[4],[29] 6.25% [6],[8],[28]
Interest 11.70% [2],[4],[29] 11.70% [6],[8],[28]
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ (9)  
Fair value at ending balance $ 204 [2],[4],[10],[29] $ (9) [6],[8],[14],[28]
Interest 6.25% [2],[4],[10],[29] 6.25% [6],[8],[14],[28]
Interest 11.70% [2],[4],[10],[29] 11.70% [6],[8],[14],[28]
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 [5],[6],[8] $ 6,416  
Fair value at ending balance $ 6,416 [2],[4],[10] $ 6,416 [5],[6],[8]
Interest 6.25% [2],[4],[10] 6.50% [5],[6],[8]
Interest 11.60% [2],[4],[10] 12.00% [5],[6],[8]
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 [6],[7],[8],[37] $ 2,734  
Fair value at ending balance $ 2,679 [2],[3],[4],[38] $ 2,734 [6],[7],[8],[37]
Interest 6.50% [2],[3],[4],[38] 6.75% [6],[7],[8],[37]
Interest 10.40% [2],[3],[4],[38] 10.90% [6],[7],[8],[37]
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 [6],[7],[8],[30] $ 2,349  
Fair value at ending balance $ 2,297 [1],[2],[3],[4] $ 2,349 [6],[7],[8],[30]
Interest 5.25% [1],[2],[3],[4] 5.25% [6],[7],[8],[30]
Interest 9.20% [1],[2],[3],[4] 9.20% [6],[7],[8],[30]
Investment, Identifier [Axis]: Dryden 43 Senior Loan Fund, Series 2016-43A, Multi-Sector Holdings, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[18] $ 1,647  
Fair value at ending balance 1,628 [3],[17] $ 1,647 [7],[18]
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 [7],[18],[20] 3,319  
Fair value at ending balance 2,423 [3],[17],[19] 3,319 [7],[18],[20]
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 [6],[7],[8],[14],[30] 115  
Fair value at ending balance $ 107 [1],[2],[3],[4],[10] $ 115 [6],[7],[8],[14],[30]
Interest 6.00% [1],[2],[3],[4],[10] 6.00% [6],[7],[8],[14],[30]
Interest 9.90% [1],[2],[3],[4],[10] 10.00% [6],[7],[8],[14],[30]
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 [5],[6],[7],[8] $ 1,401  
Fair value at ending balance $ 1,387 [2],[3],[4],[27] $ 1,401 [5],[6],[7],[8]
Interest 6.00% [2],[3],[4],[27] 6.00% [5],[6],[7],[8]
Interest 11.30% [2],[3],[4],[27] 11.30% [5],[6],[7],[8]
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 [5],[6],[7],[8] $ 993  
Fair value at ending balance $ 1,000 [2],[3],[4],[27] $ 993 [5],[6],[7],[8]
Interest 6.10% [2],[3],[4],[27] 6.10% [5],[6],[7],[8]
Interest 11.40% [2],[3],[4],[27] 11.50% [5],[6],[7],[8]
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 [5],[6],[8] $ 14,479  
Fair value at ending balance $ 14,739 [2],[4],[27] $ 14,479 [5],[6],[8]
Interest 5.75% [2],[4],[27] 5.75% [5],[6],[8]
Interest 11.20% [2],[4],[27] 11.20% [5],[6],[8]
Investment, Identifier [Axis]: EFC International, Automotive, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 301  
Fair value at ending balance $ 339 [4],[19] $ 301 [8],[20]
Investment owned, balance (in shares) 163.83 [4],[9],[11],[12],[19] 163.83 [8],[20]
Investment, Identifier [Axis]: EFC International, Automotive, Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] $ 764  
Fair value at ending balance $ 771 [4] $ 764 [8]
Interest 11.00% [4] 11.00% [8]
Investment, interest rate, paid in kind 2.50% [4] 2.50% [8]
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 [5],[6],[8] $ 11,155  
Fair value at ending balance $ 11,822 [2],[4],[27] $ 11,155 [5],[6],[8]
Interest 5.75% [2],[4],[27] 5.75% [5],[6],[8]
Interest 11.20% [2],[4],[27] 11.50% [5],[6],[8]
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 [5],[6],[8],[14] $ 2,233  
Fair value at ending balance $ 2,750 [2],[4],[10],[27] $ 2,233 [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 11.20% [2],[4],[10],[27] 11.50% [5],[6],[8],[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 [5],[6],[8] $ 5,740  
Fair value at ending balance $ 5,792 [2],[4],[27] $ 5,740 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.75% [5],[6],[8]
Interest 10.90% [2],[4],[27] 11.10% [5],[6],[8]
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 [8],[20] $ 491  
Fair value at ending balance $ 475 [4],[19] $ 491 [8],[20]
Investment owned, balance (in shares) 530.92 [4],[9],[11],[12],[19] 530.92 [8],[20]
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 [5],[6],[8] $ 8,844  
Fair value at ending balance $ 9,251 [2],[4],[27] $ 8,844 [5],[6],[8]
Interest 7.25% [2],[4],[27] 7.00% [5],[6],[8]
Interest 12.40% [2],[4],[27] 12.50% [5],[6],[8]
Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC, Revolver, Funded    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 5,500  
Fair value at ending balance 5,900 $ 5,500
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 [8] 145,799  
Fair value at ending balance $ 143,116 [4] $ 145,799 [8]
Investment owned, balance (in shares) 89,447,396 [4],[9],[11],[12] 89,447,396 [8],[13],[15],[16]
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 [8],[14],[28] $ 5,545  
Fair value at ending balance $ 5,909 [4],[10],[29] $ 5,545 [8],[14],[28]
Interest 7.25% [4],[10],[29] 7.25% [8],[14],[28]
Interest 12.60% [4],[10],[29] 12.60% [8],[14],[28]
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 [8] $ 4,545  
Fair value at ending balance $ 4,545 [4] $ 4,545 [8]
Interest 7.50% [4] 7.50% [8]
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 [21] $ 145,799 $ 135,066
Gross Additions [21],[22] 0 354
Gross Reductions [21],[23] 0 (621)
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] (2,683) 11,000
Fair value at ending balance [21] 143,116 145,799
Amount of Interest or Dividends Credited to Income [21],[24] $ 3,220 $ 14,498
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 [21] $ 5,545 $ 5,273
Gross Additions [21],[22] 11,459 35,201
Gross Reductions [21],[23] (11,091) (34,909)
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] (4) (20)
Fair value at ending balance [21] 5,909 5,545
Amount of Interest or Dividends Credited to Income [21],[24] $ 105 $ 408
Interest 7.25% 7.25%
Interest 12.60% 12.60%
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 [21] $ 4,545 $ 4,545
Gross Additions [21],[22] 2 6
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] (2) (6)
Fair value at ending balance [21] 4,545 4,545
Amount of Interest or Dividends Credited to Income [21],[24] $ 87 $ 347
Interest 7.50% 7.50%
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 [5],[6],[8] $ 4,430  
Fair value at ending balance $ 4,344 [2],[4],[27] $ 4,430 [5],[6],[8]
Interest 5.50% [2],[4],[27] 6.25% [5],[6],[8]
Interest 11.00% [2],[4],[27] 11.50% [5],[6],[8]
Investment, interest rate, paid in kind [2],[4],[27] 2.00%  
Investment, Identifier [Axis]: Entact Environmental Services, Inc., Environmental Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 7,245  
Fair value at ending balance $ 6,897 [2],[4],[27] $ 7,245 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 10.90% [2],[4],[27] 10.90% [5],[6],[8]
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3],[4] $ 1,154  
Interest [1],[2],[3],[4] 4.50%  
Interest [1],[2],[3],[4] 8.40%  
Investment, interest rate, paid in kind [1],[2],[3],[4] 2.80%  
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[30] $ 1,047  
Fair value at ending balance $ (678) [1],[2],[3],[4],[10] $ 1,047 [6],[7],[8],[14],[30]
Interest 7.00% [1],[2],[3],[4],[10] 4.50% [6],[7],[8],[14],[30]
Interest 10.90% [1],[2],[3],[4],[10] 8.50% [6],[7],[8],[14],[30]
Investment, interest rate, paid in kind [6],[7],[8],[14],[30]   2.80%
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[7],[8] $ 700  
Fair value at ending balance $ 596 [2],[3],[4],[27] $ 700 [5],[6],[7],[8]
Interest 4.50% [2],[3],[4],[27] 4.50% [5],[6],[7],[8]
Interest 9.80% [2],[3],[4],[27] 9.80% [5],[6],[7],[8]
Investment, interest rate, paid in kind 2.80% [2],[3],[4],[27] 2.80% [5],[6],[7],[8]
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[35] $ 2,096  
Fair value at ending balance $ 1,769 [2],[3],[4],[36] $ 2,096 [6],[7],[8],[35]
Interest 4.50% [2],[3],[4],[36] 4.50% [6],[7],[8],[35]
Interest 9.70% [2],[3],[4],[36] 9.50% [6],[7],[8],[35]
Investment, interest rate, paid in kind 2.80% [2],[3],[4],[36] 2.80% [6],[7],[8],[35]
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8] $ 543  
Fair value at ending balance $ 0 [3],[4] $ 543 [7],[8]
Investment, interest rate, paid in kind 11.50% [3],[4] 11.50% [7],[8]
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 [6],[7],[8],[14],[41] $ 1,535  
Fair value at ending balance $ 1,452 [1],[2],[3],[4],[10] $ 1,535 [6],[7],[8],[14],[41]
Interest 6.50% [1],[2],[3],[4],[10] 6.50% [6],[7],[8],[14],[41]
Interest 10.90% [1],[2],[3],[4],[10] 10.80% [6],[7],[8],[14],[41]
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, Technology, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[41] $ 20  
Fair value at ending balance [6],[7],[8],[41]   $ 20
Interest [6],[7],[8],[41]   6.50%
Interest [6],[7],[8],[41]   10.80%
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 [5],[6],[8] 6,324  
Fair value at ending balance $ 6,430 [2],[4],[27] $ 6,324 [5],[6],[8]
Interest 6.50% [2],[4],[27] 6.50% [5],[6],[8]
Interest 11.80% [2],[4],[27] 12.20% [5],[6],[8]
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 [5],[6],[8],[14] $ 138  
Fair value at ending balance $ 141 [2],[4],[10],[27] $ 138 [5],[6],[8],[14]
Interest 6.50% [2],[4],[10],[27] 6.50% [5],[6],[8],[14]
Interest 11.80% [2],[4],[10],[27] 12.20% [5],[6],[8],[14]
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 [6],[7],[8],[30] $ 1,933  
Fair value at ending balance $ 1,924 [1],[2],[3],[4] $ 1,933 [6],[7],[8],[30]
Interest 6.50% [1],[2],[3],[4] 6.50% [6],[7],[8],[30]
Interest 10.50% [1],[2],[3],[4] 10.50% [6],[7],[8],[30]
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 [5],[6],[8] $ 4,768  
Fair value at ending balance $ 4,777 [2],[4],[27] $ 4,768 [5],[6],[8]
Interest 5.75% [2],[4],[27] 5.75% [5],[6],[8]
Interest 11.20% [2],[4],[27] 11.10% [5],[6],[8]
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 [8],[20] $ 16  
Fair value at ending balance $ 15 [4],[19] $ 16 [8],[20]
Investment owned, balance (in shares) 1,160.9 [4],[9],[11],[12],[19] 1,160.9 [8],[13],[15],[16],[20]
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 [8],[20] $ 72  
Fair value at ending balance $ 64 [4],[19] $ 72 [8],[20]
Investment owned, balance (in shares) 5,104.3 [4],[9],[11],[12],[19] 5,104.3 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Faraday, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[30] $ 1,632  
Fair value at ending balance $ 1,601 [1],[2],[3],[4],[10] $ 1,632 [6],[7],[8],[14],[30]
Interest 6.25% [1],[2],[3],[4],[10] 6.25% [6],[7],[8],[14],[30]
Interest 10.20% [1],[2],[3],[4],[10] 10.20% [6],[7],[8],[14],[30]
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 [8] $ 2,670  
Fair value at ending balance $ 2,670 [4] $ 2,670 [8]
Investment owned, balance (in shares) 2,886 [4],[9],[11],[12] 2,886 [8],[13],[15],[16]
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 [8] $ 5,266  
Fair value at ending balance $ 5,657 [4] $ 5,266 [8]
Investment owned, balance (in shares) 6,582.7 [4],[9],[11],[12] 6,582.7 [8],[13],[15],[16]
Investment, interest rate, paid in kind 11.00% [4] 11.00% [8]
Investment, Identifier [Axis]: Finaxy Holding, Banking, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8] $ 2,009  
Fair value at ending balance $ 1,969 [3],[4] $ 2,009 [7],[8]
Investment, interest rate, paid in kind 10.30% [3],[4] 10.30% [7],[8]
Investment, Identifier [Axis]: Finaxy Holding,Banking,First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[30] $ 4,431  
Fair value at ending balance $ 4,347 [1],[2],[3],[4] $ 4,431 [6],[7],[8],[30]
Interest 6.25% [1],[2],[3],[4] 6.25% [6],[7],[8],[30]
Interest 10.10% [1],[2],[3],[4] 10.20% [6],[7],[8],[30]
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 [5],[6],[8] $ 1,275  
Fair value at ending balance $ 1,263 [2],[4],[27] $ 1,275 [5],[6],[8]
Interest 4.75% [2],[4],[27] 4.75% [5],[6],[8]
Interest 10.10% [2],[4],[27] 10.10% [5],[6],[8]
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 [6],[7],[8],[14],[37] $ 4,230  
Fair value at ending balance $ 4,752 [2],[3],[4],[10],[38] $ 4,230 [6],[7],[8],[14],[37]
Interest 6.50% [2],[3],[4],[10],[38] 6.25% [6],[7],[8],[14],[37]
Interest 9.90% [2],[3],[4],[10],[38] 9.90% [6],[7],[8],[14],[37]
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 [6],[8],[28] $ 4,073  
Fair value at ending balance $ 4,104 [2],[4],[29] $ 4,073 [6],[8],[28]
Interest 4.75% [2],[4],[29] 4.75% [6],[8],[28]
Interest 10.20% [2],[4],[29] 10.10% [6],[8],[28]
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 [8],[20] $ 855  
Fair value at ending balance $ 775 [4],[19] $ 855 [8],[20]
Investment owned, balance (in shares) 966.99 [4],[9],[11],[12],[19] 966.99 [8],[13],[15],[16],[20]
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 [5],[6],[8] $ 13,404  
Fair value at ending balance $ 13,514 [2],[4],[27] $ 13,404 [5],[6],[8]
Interest 7.25% [2],[4],[27] 7.25% [5],[6],[8]
Interest 12.50% [2],[4],[27] 12.60% [5],[6],[8]
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 $ 13,187  
Fair value at ending balance $ 14,278 $ 13,187
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 [7],[8],[20] $ 3,196  
Fair value at ending balance $ 3,535 [3],[4],[19] $ 3,196 [7],[8],[20]
Investment owned, balance (in shares) 2,828,286 [3],[4],[9],[11],[12],[19] 2,828,286 [7],[8],[13],[15],[16],[20]
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 [6],[7],[8],[14],[35] $ 1,808  
Fair value at ending balance $ 1,779 [2],[3],[4],[10],[36] $ 1,808 [6],[7],[8],[14],[35]
Interest 6.75% [2],[3],[4],[10],[36] 6.75% [6],[7],[8],[14],[35]
Interest 11.70% [2],[3],[4],[10],[36] 11.90% [6],[7],[8],[14],[35]
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, Class A LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[19] $ 146  
Investment owned, balance (in shares) [4],[9],[11],[12],[19] 146  
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, Class B LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[19] $ 0  
Investment owned, balance (in shares) [4],[9],[11],[12],[19] 146  
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ (7)  
Interest [2],[4],[10],[27] 5.75%  
Interest [2],[4],[10],[27] 11.10%  
Investment, Identifier [Axis]: Forest Buyer, LLC, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ 1,536  
Interest [2],[4],[10],[27] 5.75%  
Interest [2],[4],[10],[27] 11.10%  
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 2,480  
Fair value at ending balance $ 8,490 [2],[4],[10],[27] $ 2,480 [5],[6],[8]
Interest 5.75% [2],[4],[10],[27] 5.25% [5],[6],[8]
Interest 11.20% [2],[4],[10],[27] 10.70% [5],[6],[8]
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Other Financial, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ (13)  
Interest [2],[4],[10],[27] 5.75%  
Interest [2],[4],[10],[27] 11.20%  
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 [5],[6],[8] $ 4,384  
Fair value at ending balance $ 4,177 [2],[4],[27] $ 4,384 [5],[6],[8]
Interest 5.75% [2],[4],[27] 5.75% [5],[6],[8]
Interest 11.30% [2],[4],[27] 11.40% [5],[6],[8]
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 [8],[20] $ 632  
Fair value at ending balance $ 412 [4],[19] $ 632 [8],[20]
Investment owned, balance (in shares) 937.5 [4],[9],[11],[12],[19] 937.5 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 10,573  
Fair value at ending balance $ 10,716 [2],[4],[27] $ 10,573 [5],[6],[8]
Interest 6.25% [2],[4],[27] 6.25% [5],[6],[8]
Interest 11.60% [2],[4],[27] 11.60% [5],[6],[8]
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 880  
Fair value at ending balance $ 932 [4],[19] $ 880 [8],[20]
Investment owned, balance (in shares) 687 [4],[9],[11],[12],[19] 687 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (15)  
Fair value at ending balance $ 0 [2],[4],[10],[27] $ (15) [5],[6],[8],[14]
Interest 6.25% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.60% [2],[4],[10],[27] 11.60% [5],[6],[8],[14]
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8],[20] $ 0  
Fair value at ending balance $ 0 [3],[4],[19] $ 0 [7],[8],[20]
Investment owned, balance (in shares) 5,785 [3],[4],[9],[11],[12],[19] 5,785 [7],[8],[13],[15],[16],[20]
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[54] $ 265  
Fair value at ending balance $ 220 [2],[3],[4],[43] $ 265 [6],[7],[8],[54]
Interest 6.00% [2],[3],[4],[43] 10.00% [6],[7],[8],[54]
Interest 9.80% [2],[3],[4],[43] 13.80% [6],[7],[8],[54]
Investment, Identifier [Axis]: GPNZ II GmbH, Healthcare, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8],[14] $ 124  
Fair value at ending balance $ 158 [3],[4],[10] $ 124 [7],[8],[14]
Investment, interest rate, paid in kind 10.00% [3],[4],[10] 10.00% [7],[8],[14]
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 [6],[7],[8],[55] $ 2,478  
Fair value at ending balance $ 2,375 [2],[3],[4],[56] $ 2,478 [6],[7],[8],[55]
Interest 6.00% [2],[3],[4],[56] 6.00% [6],[7],[8],[55]
Interest 10.30% [2],[3],[4],[56] 10.30% [6],[7],[8],[55]
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 [6],[7],[8],[14],[57] $ 4,295  
Fair value at ending balance $ 4,069 [2],[3],[4],[10],[58] $ 4,295 [6],[7],[8],[14],[57]
Interest 6.00% [2],[3],[4],[10],[58] 6.00% [6],[7],[8],[14],[57]
Interest 11.70% [2],[3],[4],[10],[58] 11.70% [6],[7],[8],[14],[57]
Investment, Identifier [Axis]: Gojo Industries, Inc. ,Industrial Other,First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 12,359  
Fair value at ending balance $ 12,574 [2],[4],[27] $ 12,359 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.40% [2],[4],[27] 10.40% [5],[6],[8]
Investment, interest rate, paid in kind 4.50% [2],[4],[27] 4.50% [5],[6],[8]
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 [6],[7],[8],[14],[30] $ 894  
Fair value at ending balance $ 888 [1],[2],[3],[4],[10] $ 894 [6],[7],[8],[14],[30]
Interest 5.25% [1],[2],[3],[4],[10] 5.25% [6],[7],[8],[14],[30]
Interest 9.20% [1],[2],[3],[4],[10] 9.20% [6],[7],[8],[14],[30]
Investment, Identifier [Axis]: Groupe Guemas,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 [6],[7],[8],[37] $ 5,006  
Fair value at ending balance $ 4,916 [2],[3],[4],[38] $ 5,006 [6],[7],[8],[37]
Interest 6.25% [2],[3],[4],[38] 6.25% [6],[7],[8],[37]
Interest 10.10% [2],[3],[4],[38] 10.10% [6],[7],[8],[37]
Investment, Identifier [Axis]: Groupe Product Life, Consumer Non-cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[30] $ 1,059  
Fair value at ending balance $ 1,064 [1],[2],[3],[4] $ 1,059 [6],[7],[8],[30]
Interest 6.50% [1],[2],[3],[4] 6.50% [6],[7],[8],[30]
Interest 10.40% [1],[2],[3],[4] 10.40% [6],[7],[8],[30]
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 [5],[6] $ 570  
Fair value at ending balance $ 567 [2],[27] $ 570 [5],[6]
Interest 6.75% [2],[27] 6.75% [5],[6]
Interest 12.20% [2],[27] 12.20% [5],[6]
Investment, Identifier [Axis]: Gusto Aus BidCo Pty Ltd., Consumer Non-Cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[55] $ 2,235  
Fair value at ending balance $ 2,109 [2],[3],[4],[10],[56] $ 2,235 [6],[7],[8],[14],[55]
Interest 6.50% [2],[3],[4],[10],[56] 6.50% [6],[7],[8],[14],[55]
Interest 10.90% [2],[3],[4],[10],[56] 10.90% [6],[7],[8],[14],[55]
Investment, Identifier [Axis]: HEKA Invest, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[30] $ 5,080  
Fair value at ending balance $ 5,059 [1],[2],[3],[4],[10] $ 5,080 [6],[7],[8],[14],[30]
Interest 6.50% [1],[2],[3],[4],[10] 6.50% [6],[7],[8],[14],[30]
Interest 10.40% [1],[2],[3],[4],[10] 10.40% [6],[7],[8],[14],[30]
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 11,355  
Fair value at ending balance $ 11,139 [2],[4],[10],[27] $ 11,355 [5],[6],[8],[14]
Interest 8.50% [2],[4],[10],[27] 8.50% [5],[6],[8],[14]
Interest 13.90% [2],[4],[10],[27] 14.00% [5],[6],[8],[14]
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (7)  
Fair value at ending balance $ (29) [2],[4],[10],[27] $ (7) [5],[6],[8],[14]
Interest 8.50% [2],[4],[10],[27] 8.50% [5],[6],[8],[14]
Interest 13.90% [2],[4],[10],[27] 14.00% [5],[6],[8],[14]
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Advertising, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 10,816  
Fair value at ending balance $ 10,973 [2],[4],[27] $ 10,816 [5],[6],[8]
Interest 6.25% [2],[4],[27] 6.25% [5],[6],[8]
Interest 11.70% [2],[4],[27] 11.80% [5],[6],[8]
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 [6],[7],[8],[14],[55] $ 674  
Fair value at ending balance $ 629 [2],[3],[4],[10],[56] $ 674 [6],[7],[8],[14],[55]
Interest 5.25% [2],[3],[4],[10],[56] 4.75% [6],[7],[8],[14],[55]
Interest 9.60% [2],[3],[4],[10],[56] 9.40% [6],[7],[8],[14],[55]
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 [8] $ 11,012  
Fair value at ending balance $ 11,268 [4] $ 11,012 [8]
Investment, interest rate, paid in kind 11.00% [4] 11.00% [8]
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 [6],[8],[28] $ 7,295  
Fair value at ending balance $ 7,246 [2],[4],[29] $ 7,295 [6],[8],[28]
Interest 5.50% [2],[4],[29] 5.50% [6],[8],[28]
Interest 10.80% [2],[4],[29] 10.90% [6],[8],[28]
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 [6],[8],[14],[28] $ 0  
Fair value at ending balance $ (11) [2],[4],[10],[29] $ 0 [6],[8],[14],[28]
Interest 5.50% [2],[4],[10],[29] 5.50% [6],[8],[14],[28]
Interest 10.80% [2],[4],[10],[29] 10.90% [6],[8],[14],[28]
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 [6],[7],[8],[37] $ 3,155  
Fair value at ending balance $ 3,075 [2],[3],[4],[38] $ 3,155 [6],[7],[8],[37]
Interest 5.75% [2],[3],[4],[38] 5.00% [6],[7],[8],[37]
Interest 9.60% [2],[3],[4],[38] 8.90% [6],[7],[8],[37]
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 101  
Fair value at ending balance $ 106 [4],[19] $ 101 [8],[20]
Investment owned, balance (in shares) 101,080 [4],[9],[11],[12],[19] 101,080 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 7,101  
Fair value at ending balance $ 7,194 [2],[4],[27] $ 7,101 [5],[6],[8]
Interest 6.00% [2],[4],[27] 6.00% [5],[6],[8]
Interest 11.30% [2],[4],[27] 11.40% [5],[6],[8]
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 342  
Fair value at ending balance $ 298 [2],[4],[10],[27] $ 342 [5],[6],[8],[14]
Interest 6.00% [2],[4],[10],[27] 6.00% [5],[6],[8],[14]
Interest 11.30% [2],[4],[10],[27] 11.40% [5],[6],[8],[14]
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 [5],[6],[8] $ 3,428  
Fair value at ending balance $ 3,426 [2],[4],[27] $ 3,428 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.40% [2],[4],[27] 10.50% [5],[6],[8]
Investment, Identifier [Axis]: HomeX Services Group LLC, Home Construction, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ 1,274  
Fair value at ending balance $ 1,310 [2],[4],[10],[29] $ 1,274 [6],[8],[14],[28]
Interest 5.50% [2],[4],[10],[29] 5.50% [6],[8],[14],[28]
Interest 10.80% [2],[4],[10],[29] 10.90% [6],[8],[14],[28]
Investment, Identifier [Axis]: HomeX Services Group LLC, Home Construction, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ (7)  
Fair value at ending balance $ (1) [2],[4],[10],[29] $ (7) [6],[8],[14],[28]
Interest 5.50% [2],[4],[10],[29] 5.50% [6],[8],[14],[28]
Interest 10.80% [2],[4],[10],[29] 10.90% [6],[8],[14],[28]
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 [6],[7],[8],[28] $ 6,160  
Fair value at ending balance $ 6,407 [2],[3],[4],[29] $ 6,160 [6],[7],[8],[28]
Interest 5.10% [2],[3],[4],[29] 5.00% [6],[7],[8],[28]
Interest 10.30% [2],[3],[4],[29] 10.50% [6],[7],[8],[28]
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 [6],[7],[8],[37] $ 1,739  
Fair value at ending balance $ 1,555 [2],[3],[4],[38] $ 1,739 [6],[7],[8],[37]
Interest 6.00% [2],[3],[4],[38] 6.25% [6],[7],[8],[37]
Interest 9.90% [2],[3],[4],[38] 10.40% [6],[7],[8],[37]
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 [21] $ 2,013 $ 4,496
Gross Additions [21],[22] 0 0
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] (940) (2,483)
Fair value at ending balance [21] 1,073 2,013
Amount of Interest or Dividends Credited to Income [21],[24] $ 0 $ 0
Investment owned, balance (in shares) 102,144 102,144
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 [8],[20] $ 2,013  
Fair value at ending balance $ 1,073 [4],[19] $ 2,013 [8],[20]
Investment owned, balance (in shares) 102,144 [4],[9],[11],[12],[19] 102,144 [8],[13],[15],[16],[20]
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 [5],[6],[8] $ 3,917  
Fair value at ending balance $ 3,917 [2],[4],[27] $ 3,917 [5],[6],[8]
Interest 8.00% [2],[4],[27] 8.00% [5],[6],[8]
Interest 13.40% [2],[4],[27] 13.40% [5],[6],[8]
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 [21] $ 4,519 [5],[6],[8] $ 4,098
Gross Additions [21],[22] 80 421
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 0 0
Fair value at ending balance [21] 4,599 [2],[4],[27] 4,519 [5],[6],[8]
Amount of Interest or Dividends Credited to Income [21],[24] $ 173 $ 665
Interest 3.00% [2],[4],[27] 3.00% [5],[6],[8]
Interest 8.30% [2],[4],[27] 8.50% [5],[6],[8]
Investment, interest rate, paid in kind [2],[4],[21],[27] 7.00%  
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 [21] $ 3,917 $ 3,917
Gross Additions [21],[22] 19 75
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] (19) (75)
Fair value at ending balance [21] 3,917 3,917
Amount of Interest or Dividends Credited to Income [21],[24] $ 151 $ 592
Interest 8.00% 8.00%
Interest 13.40% 13.40%
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 [6],[7],[8],[30] $ 2,713  
Fair value at ending balance $ 2,658 [1],[2],[3],[4] $ 2,713 [6],[7],[8],[30]
Interest 5.55% [1],[2],[3],[4] 5.50% [6],[7],[8],[30]
Interest 9.50% [1],[2],[3],[4] 9.50% [6],[7],[8],[30]
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 [6],[7],[8],[14],[30] $ 5,711  
Fair value at ending balance $ 5,006 [1],[2],[3],[4],[10] $ 5,711 [6],[7],[8],[14],[30]
Interest 5.37% [1],[2],[3],[4],[10] 5.37% [6],[7],[8],[14],[30]
Interest 9.30% [1],[2],[3],[4],[10] 9.30% [6],[7],[8],[14],[30]
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Healthcare First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 6,616  
Fair value at ending balance $ 6,642 [2],[4],[27] $ 6,616 [5],[6],[8]
Interest 6.25% [2],[4],[27] 6.25% [5],[6],[8]
Interest 11.60% [2],[4],[27] 11.60% [5],[6],[8]
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Healthcare, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (18)  
Fair value at ending balance $ (15) [2],[4],[10],[27] $ (18) [5],[6],[8],[14]
Interest 6.25% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.60% [2],[4],[10],[27] 11.60% [5],[6],[8],[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 [8],[20] $ 715  
Fair value at ending balance $ 764 [4],[19] $ 715 [8],[20]
Investment owned, balance (in shares) 7,500.4 [4],[9],[11],[12],[19] 7,500.4 [8],[13],[15],[16],[20]
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 [5],[6],[8] $ 12,757  
Fair value at ending balance $ 690 [2],[4],[27] $ 12,757 [5],[6],[8]
Interest 6.25% [2],[4],[27] 6.50% [5],[6],[8]
Interest 11.70% [2],[4],[27] 12.00% [5],[6],[8]
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 12,100  
Interest [2],[4],[27] 6.50%  
Interest [2],[4],[27] 11.90%  
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 [5],[6],[8],[14] $ 67  
Fair value at ending balance $ 73 [2],[4],[10],[27] $ 67 [5],[6],[8],[14]
Interest 6.50% [2],[4],[10],[27] 6.50% [5],[6],[8],[14]
Interest 11.90% [2],[4],[10],[27] 12.00% [5],[6],[8],[14]
Investment, Identifier [Axis]: Ice House America, L.L.C., Consumer Products, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ 4,029  
Interest [2],[4],[10],[27] 5.50%  
Interest [2],[4],[10],[27] 10.80%  
Investment, Identifier [Axis]: Ice House America, L.L.C., Consumer Products, LLC Units (2,703 units)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[19] $ 270  
Investment owned, balance (in shares) [4],[9],[11],[12],[19] 2,703  
Investment, Identifier [Axis]: Ice House America, L.L.C., Consumer Products, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ 59  
Interest [2],[4],[10],[27] 5.50%  
Interest [2],[4],[10],[27] 10.80%  
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 [6],[7],[8],[37] $ 2,879  
Fair value at ending balance $ 2,838 [2],[3],[4],[38] $ 2,879 [6],[7],[8],[37]
Interest 4.75% [2],[3],[4],[38] 4.75% [6],[7],[8],[37]
Interest 8.70% [2],[3],[4],[38] 8.70% [6],[7],[8],[37]
Investment, Identifier [Axis]: Innovad Group II BV, Beverage, Food & Tobacco, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[37] $ 6,203  
Fair value at ending balance $ 6,281 [2],[3],[4],[10],[38] $ 6,203 [6],[7],[8],[14],[37]
Interest 6.50% [2],[3],[4],[10],[38] 5.75% [6],[7],[8],[14],[37]
Interest 9.40% [2],[3],[4],[10],[38] 9.60% [6],[7],[8],[14],[37]
Investment, Identifier [Axis]: Innovad Group II BV, Beverage, Food & Tobacco, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[59] $ 1,035  
Fair value at ending balance $ 1,000 [2],[3],[4],[60] $ 1,035 [6],[7],[8],[59]
Interest 5.75% [2],[3],[4],[60] 5.75% [6],[7],[8],[59]
Interest 8.00% [2],[3],[4],[60] 7.50% [6],[7],[8],[59]
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 [6],[18],[25] $ 2,469  
Fair value at ending balance $ 2,730 [2],[17],[26] $ 2,469 [6],[18],[25]
Interest 4.25% [2],[17],[26] 4.25% [6],[18],[25]
Interest 9.60% [2],[17],[26] 9.90% [6],[18],[25]
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 [6],[7],[8],[14],[30] $ 1,676  
Fair value at ending balance $ 64 [1],[2],[3],[4] $ 1,676 [6],[7],[8],[14],[30]
Interest 5.50% [1],[2],[3],[4] 5.50% [6],[7],[8],[14],[30]
Interest 9.90% [1],[2],[3],[4] 9.40% [6],[7],[8],[14],[30]
Investment, Identifier [Axis]: Interstellar Group B.V., Technology, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3],[4],[10] $ 1,578  
Interest [1],[2],[3],[4],[10] 5.50%  
Interest [1],[2],[3],[4],[10] 9.90%  
Investment, Identifier [Axis]: InvoCare Limited, Consumer Cyclical Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[55] $ 2,051  
Fair value at ending balance $ 1,969 [2],[3],[4],[10],[56] $ 2,051 [6],[7],[8],[14],[55]
Interest 6.25% [2],[3],[4],[10],[56] 6.25% [6],[7],[8],[14],[55]
Interest 10.60% [2],[3],[4],[10],[56] 10.70% [6],[7],[8],[14],[55]
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 [6],[18],[28] $ 2,622  
Fair value at ending balance $ 2,655 [2],[17],[29] $ 2,622 [6],[18],[28]
Interest 7.50% [2],[17],[29] 7.50% [6],[18],[28]
Interest 12.80% [2],[17],[29] 13.00% [6],[18],[28]
Investment, Identifier [Axis]: Isagenix International, LLC, Wholesale, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 0  
Fair value at ending balance $ 0 [4],[19] $ 0 [8],[20]
Investment owned, balance (in shares) 58,538 [4],[9],[11],[12],[19] 58,538 [8],[13],[15],[16],[20]
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 [5],[6],[18] $ 718  
Fair value at ending balance $ 733 [2],[17],[27] $ 718 [5],[6],[18]
Interest 5.60% [2],[17],[27] 5.60% [5],[6],[18]
Interest 11.00% [2],[17],[27] 10.60% [5],[6],[18]
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), Trading Companies & Distributors, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[30] $ 4,778  
Fair value at ending balance $ 5,273 [1],[2],[3],[4],[10] $ 4,778 [6],[7],[8],[14],[30]
Interest 6.50% [1],[2],[3],[4],[10] 6.50% [6],[7],[8],[14],[30]
Interest 10.40% [1],[2],[3],[4],[10] 10.50% [6],[7],[8],[14],[30]
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 [5],[6],[18] $ 4,800  
Fair value at ending balance $ 5,139 [2],[17],[27] $ 4,800 [5],[6],[18]
Interest 7.25% [2],[17],[27] 7.25% [5],[6],[18]
Interest 12.80% [2],[17],[27] 12.90% [5],[6],[18]
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 [5],[6],[8] $ 3,598  
Fair value at ending balance $ 3,657 [2],[4],[27] $ 3,598 [5],[6],[8]
Interest 5.95% [2],[4],[27] 5.50% [5],[6],[8]
Interest 11.30% [2],[4],[27] 11.00% [5],[6],[8]
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 [6],[7],[8],[37] $ 1,176  
Fair value at ending balance $ 1,161 [2],[3],[4],[38] $ 1,176 [6],[7],[8],[37]
Interest 5.25% [2],[3],[4],[38] 5.25% [6],[7],[8],[37]
Interest 9.30% [2],[3],[4],[38] 9.30% [6],[7],[8],[37]
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 [6],[7],[8],[25] $ 6,648  
Fair value at ending balance $ 6,714 [2],[3],[4],[26] $ 6,648 [6],[7],[8],[25]
Interest 5.25% [2],[3],[4],[26] 5.25% [6],[7],[8],[25]
Interest 10.60% [2],[3],[4],[26] 10.60% [6],[7],[8],[25]
Investment, Identifier [Axis]: JetBlue 2019-1 Class B Pass Through Trust, Structured Products, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 3,026  
Fair value at ending balance $ 3,082 $ 3,026
Interest 8.00% 8.00%
Investment, Identifier [Axis]: Jocassee Partners LLC, Investment Funds & Vehicles, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[14] $ 41,053  
Fair value at ending balance 41,424 [3],[10] $ 41,053 [7],[14]
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 41,053 40,088
Gross Additions [22] 0 0 [21]
Gross Reductions [23] 0 0 [21]
Amount of Realized Gain (Loss) 0 0 [21]
Amount of Unrealized Gain (Loss) 371 965 [21]
Fair value at ending balance 41,424 41,053 [21]
Amount of Interest or Dividends Credited to Income [24] 1,427 5,709 [21]
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 [6],[7],[8],[14],[57] 3,844  
Fair value at ending balance $ 3,647 [2],[3],[4],[10],[58] $ 3,844 [6],[7],[8],[14],[57]
Interest 4.50% [2],[3],[4],[10],[58] 4.50% [6],[7],[8],[14],[57]
Interest 10.20% [2],[3],[4],[10],[58] 10.20% [6],[7],[8],[14],[57]
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 [5],[6],[8] $ 3,414  
Fair value at ending balance $ 3,439 [2],[4],[27] $ 3,414 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 10.90% [2],[4],[27] 11.00% [5],[6],[8]
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 [8] $ 228  
Fair value at ending balance $ 242 [4] $ 228 [8]
Investment owned, balance (in shares) 1,018 [4],[9] 1,018 [8],[13],[15],[16]
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 [5],[6],[8],[14] $ (8)  
Fair value at ending balance $ (5) [2],[4],[10],[27] $ (8) [5],[6],[8],[14]
Interest 5.50% [2],[4],[10],[27] 5.50% [5],[6],[8],[14]
Interest 10.90% [2],[4],[10],[27] 11.00% [5],[6],[8],[14]
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 [5],[6],[8],[14] $ 5,545  
Fair value at ending balance $ 8,391 [2],[4],[10],[27] $ 5,545 [5],[6],[8],[14]
Interest 5.00% [2],[4],[10],[27] 5.00% [5],[6],[8],[14]
Interest 10.40% [2],[4],[10],[27] 10.50% [5],[6],[8],[14]
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 [8],[20] $ 224  
Fair value at ending balance $ 217 [4],[19] $ 224 [8],[20]
Investment owned, balance (in shares) 203.2 [4],[9],[19] 203.2 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] $ 0 $ 1,181
Gross Additions [21],[22]   0
Gross Reductions [21],[23]   (2,300)
Amount of Realized Gain (Loss) [21]   711
Amount of Unrealized Gain (Loss) [21]   408
Fair value at ending balance [21]   0
Amount of Interest or Dividends Credited to Income [21],[24]   $ 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 [21] 0 $ 1,565
Gross Additions [21],[22]   237
Gross Reductions [21],[23]   (1,802)
Amount of Realized Gain (Loss) [21]   0
Amount of Unrealized Gain (Loss) [21]   0
Fair value at ending balance [21]   0
Amount of Interest or Dividends Credited to Income [21],[24]   $ 156
Investment, interest rate, paid in kind   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 [5],[6],[8] 7,031  
Fair value at ending balance [5],[6],[8]   $ 7,031
Interest [5],[6],[8]   4.25%
Interest [5],[6],[8]   9.70%
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 [5],[6],[8] 9,116  
Fair value at ending balance $ 9,097 [2],[4],[27] $ 9,116 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 10.90% [2],[4],[27] 10.80% [5],[6],[8]
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 [8],[20] $ 599  
Fair value at ending balance $ 606 [4],[19] $ 599 [8],[20]
Investment owned, balance (in shares) 637,677.11 [4],[9],[11],[12],[19] 637,677.11 [8],[13],[15],[16],[20]
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 [5],[6],[8] $ 8,413  
Fair value at ending balance $ 8,286 [2],[4],[27] $ 8,413 [5],[6],[8]
Interest 4.75% [2],[4],[27] 4.75% [5],[6],[8]
Interest 10.10% [2],[4],[27] 10.10% [5],[6],[8]
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 [6],[7],[8],[14],[30] $ 1,854  
Fair value at ending balance $ 1,787 [1],[2],[3],[4],[10] $ 1,854 [6],[7],[8],[14],[30]
Interest 6.50% [1],[2],[3],[4],[10] 6.25% [6],[7],[8],[14],[30]
Interest 10.40% [1],[2],[3],[4],[10] 10.40% [6],[7],[8],[14],[30]
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 [7],[8] $ 1,587  
Fair value at ending balance $ 1,534 [3],[4] $ 1,587 [7],[8]
Investment, interest rate, paid in kind 12.00% [3],[4] 12.00% [7],[8]
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 [6],[7],[8],[14],[25] $ 659  
Fair value at ending balance $ 680 [2],[3],[4],[10],[26] $ 659 [6],[7],[8],[14],[25]
Interest 5.75% [2],[3],[4],[10],[26] 5.75% [6],[7],[8],[14],[25]
Interest 11.10% [2],[3],[4],[10],[26] 11.10% [6],[7],[8],[14],[25]
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 [6],[7],[8],[14],[25] $ 16  
Fair value at ending balance $ 16 [2],[3],[4],[10],[26] $ 16 [6],[7],[8],[14],[25]
Interest 5.75% [2],[3],[4],[10],[26] 5.75% [6],[7],[8],[14],[25]
Interest 11.10% [2],[3],[4],[10],[26] 11.10% [6],[7],[8],[14],[25]
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 [5],[6],[8] $ 10,096  
Fair value at ending balance $ 10,073 [2],[4],[27] $ 10,096 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.75% [5],[6],[8]
Interest 10.80% [2],[4],[27] 11.20% [5],[6],[8]
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 [8] $ 239  
Fair value at ending balance $ 172 [4] $ 239 [8]
Investment owned, balance (in shares) 81,664 [4],[9],[11],[12] 81,739 [8],[13],[15],[16]
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 [5],[6],[8],[14] $ 400  
Fair value at ending balance $ (26) [2],[4],[10],[27] $ 400 [5],[6],[8],[14]
Interest 6.00% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 11.30% [2],[4],[10],[27] 11.20% [5],[6],[8],[14]
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 [6],[28] $ 5,311  
Fair value at ending balance $ 5,471 [2],[29] $ 5,311 [6],[28]
Interest 5.50% [2],[29] 5.50% [6],[28]
Interest 10.80% [2],[29] 10.90% [6],[28]
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 [8],[20] $ 4,037  
Fair value at ending balance $ 4,698 [4],[19] $ 4,037 [8],[20]
Investment owned, balance (in shares) 94,441 [4],[9],[11],[12],[19] 94,441 [8],[13],[15],[16],[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 [8],[33],[61] $ 0  
Fair value at ending balance $ 0 [4],[34],[62] $ 0 [8],[33],[61]
Investment, interest rate, paid in kind 16.00% [4],[34],[62] 16.00% [8],[33],[61]
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 [5],[6],[8],[18] $ 2,675  
Fair value at ending balance $ 2,675 [2],[4],[17],[27] $ 2,675 [5],[6],[8],[18]
Interest 7.00% [2],[4],[17],[27] 7.00% [5],[6],[8],[18]
Interest 12.30% [2],[4],[17],[27] 12.70% [5],[6],[8],[18]
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 [5],[6],[8],[14],[18] $ (275)  
Fair value at ending balance $ (275) [2],[4],[10],[17],[27] $ (275) [5],[6],[8],[14],[18]
Interest 7.00% [2],[4],[10],[17],[27] 7.00% [5],[6],[8],[14],[18]
Interest 12.30% [2],[4],[10],[17],[27] 12.70% [5],[6],[8],[14],[18]
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 [5],[6],[8] $ 860  
Fair value at ending balance $ 861 [2],[4],[27] $ 860 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.30% [2],[4],[27] 10.60% [5],[6],[8]
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 [6],[18],[28] $ 1,274  
Fair value at ending balance [6],[18],[28]   $ 1,274
Interest [6],[18],[28]   4.75%
Interest [6],[18],[28]   10.30%
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 [6],[8],[28] 6,308  
Fair value at ending balance $ 7,185 [2],[4],[29] $ 6,308 [6],[8],[28]
Interest 1.00% [2],[4],[29] 1.00% [6],[8],[28]
Interest 6.30% [2],[4],[29] 6.30% [6],[8],[28]
Investment, interest rate, paid in kind 6.00% [2],[4],[29] 6.00% [6],[8],[28]
Investment, Identifier [Axis]: MB Purchaser, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ 1,786  
Interest 4.75%  
Interest 10.10%  
Investment, Identifier [Axis]: MB Purchaser, LLC, Technology, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[19] $ 68  
Investment owned, balance (in shares) [4],[9],[11],[12],[19] 66  
Investment, Identifier [Axis]: MB Purchaser, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ (6)  
Interest 4.75%  
Interest 10.10%  
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 [5],[6],[8],[14] $ 4,133  
Fair value at ending balance $ 4,138 [2],[4],[10],[27] $ 4,133 [5],[6],[8],[14]
Interest 5.50% [2],[4],[10],[27] 5.50% [5],[6],[8],[14]
Interest 10.90% [2],[4],[10],[27] 11.00% [5],[6],[8],[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 [8],[20] $ 778  
Fair value at ending balance $ 740 [4],[19] $ 778 [8],[20]
Investment owned, balance (in shares) 746.66 [4],[9],[11],[12],[19] 746.66 [8],[13],[15],[16],[20]
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 [6],[8],[28] $ 901  
Fair value at ending balance $ 900 [2],[4],[29] $ 901 [6],[8],[28]
Interest 5.50% [2],[4],[29] 5.50% [6],[8],[28]
Interest 10.90% [2],[4],[29] 11.00% [6],[8],[28]
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 [8],[20] $ 82  
Fair value at ending balance $ 88 [4],[19] $ 82 [8],[20]
Investment owned, balance (in shares) 76,923 [4],[9],[11],[12],[19] 76,923 [8],[13],[15],[16],[20]
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 [46] $ 9,762 $ 7,149
Gross Additions [46],[47] 0 2,613
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] 0 0
Fair value at ending balance [46] 9,762 9,762
Amount of Interest or Dividends Credited to Income [46],[49] $ 148 $ 587
Interest 4.50% 4.50%
Investment, interest rate, paid in kind 1.50% 1.50%
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 [46] $ 15,430 $ 9,675
Gross Additions [46],[47] 0 0
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] 8,133 5,755
Fair value at ending balance [46] 23,563 15,430
Amount of Interest or Dividends Credited to Income [46],[49] $ 0 $ 0
Investment owned, balance (in shares) 18,000 18,000
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 [7],[8],[61] $ 9,762  
Fair value at ending balance $ 9,762 [3],[4],[62] $ 9,762 [7],[8],[61]
Interest 4.50% [3],[4],[62] 4.50% [7],[8],[61]
Investment, interest rate, paid in kind 1.50% [3],[4],[62] 1.50% [7],[8],[61]
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 [7],[8],[20],[61] $ 15,430  
Fair value at ending balance $ 23,563 [3],[4],[19],[62] $ 15,430 [7],[8],[20],[61]
Investment owned, balance (in shares) 18,000 [3],[4],[9],[11],[12],[19],[62] 18,000 [7],[8],[13],[15],[16],[20],[61]
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 $ 24 $ 45
Gross Additions [47] 0 0
Gross Reductions [48] 0 (24)
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (12) 3
Fair value at ending balance 12 24
Amount of Interest or Dividends Credited to Income [49] $ 15 $ 95
Investment owned, balance (in shares) 1,831.4 1,831.4
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 [7],[20],[61] $ 24  
Fair value at ending balance $ 12 [3],[19],[62] $ 24 [7],[20],[61]
Investment owned, balance (in shares) 1,831.4 [3],[9],[11],[12],[19],[62] 1,831.4 [7],[13],[15],[16],[20],[61]
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 [7],[20],[61] $ 981  
Fair value at ending balance $ 499 [3],[19],[62] $ 981 [7],[20],[61]
Investment owned, balance (in shares) 71,790.4 [3],[9],[11],[12],[19],[62] 71,790.4 [7],[13],[15],[16],[20],[61]
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 $ 981 $ 1,793
Gross Additions [47] 0 0
Gross Reductions [48] 0 (940)
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (482) 128
Fair value at ending balance 499 981
Amount of Interest or Dividends Credited to Income [49] $ 0 $ 0
Investment owned, balance (in shares) 71,790.4 71,790.4
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 [5],[7],[18] $ 5,067  
Fair value at ending balance $ 5,160 [3],[17],[27] $ 5,067 [5],[7],[18]
Interest 9.03% [3],[17],[27] 9.03% [5],[7],[18]
Interest 14.30% [3],[17],[27] 14.40% [5],[7],[18]
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 [7],[18] $ 8,181  
Fair value at ending balance 8,445 [3],[17] $ 8,181 [7],[18]
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 [6],[7],[8],[14],[30] 1,777  
Fair value at ending balance [6],[7],[8],[14],[30]   $ 1,777
Interest [6],[7],[8],[14],[30]   6.75%
Interest [6],[7],[8],[14],[30]   3.90%
Investment, interest rate, paid in kind [6],[7],[8],[14],[30]   6.80%
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 ending balance [1],[2],[3],[4],[10],[34] $ 163  
Interest [1],[2],[3],[4],[10],[34] 6.75%  
Investment, interest rate, paid in kind [1],[2],[3],[4],[10],[34] 10.60%  
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3],[4],[34] $ 932  
Interest [1],[2],[3],[4],[34] 6.75%  
Investment, interest rate, paid in kind [1],[2],[3],[4],[34] 10.60%  
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 [6],[7],[8],[14],[30] $ 6  
Fair value at ending balance $ (35) [1],[2],[3],[4],[10] $ 6 [6],[7],[8],[14],[30]
Interest 5.75% [1],[2],[3],[4],[10] 5.75% [6],[7],[8],[14],[30]
Interest [6],[7],[8],[14],[30]   3.90%
Investment, interest rate, paid in kind 9.60% [1],[2],[3],[4],[10] 5.80% [6],[7],[8],[14],[30]
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, Super Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[3],[4],[34] $ 183  
Interest [1],[2],[3],[4],[34] 6.00%  
Investment, interest rate, paid in kind [1],[2],[3],[4],[34] 9.90%  
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 [5],[6],[8] $ 10,462  
Fair value at ending balance $ 10,737 [2],[4],[27] $ 10,462 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 10.80% [2],[4],[27] 11.00% [5],[6],[8]
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 [5],[6],[8],[14] $ 1,914  
Fair value at ending balance $ 2,031 [2],[4],[10],[27] $ 1,914 [5],[6],[8],[14]
Interest 5.50% [2],[4],[10],[27] 5.50% [5],[6],[8],[14]
Interest 10.80% [2],[4],[10],[27] 11.00% [5],[6],[8],[14]
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 [5],[6],[8] $ 2,764  
Fair value at ending balance $ 2,789 [2],[4],[27] $ 2,764 [5],[6],[8]
Interest 6.00% [2],[4],[27] 6.00% [5],[6],[8]
Interest 11.60% [2],[4],[27] 11.60% [5],[6],[8]
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 [6],[8],[35] $ 3,946  
Fair value at ending balance $ 3,926 [2],[4],[36] $ 3,946 [6],[8],[35]
Interest 6.00% [2],[4],[36] 6.00% [6],[8],[35]
Interest 11.30% [2],[4],[36] 11.20% [6],[8],[35]
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 [6],[7],[39] $ 8,595  
Fair value at ending balance $ 8,836 [2],[3],[40] $ 8,595 [6],[7],[39]
Interest 6.00% [2],[3],[40] 6.00% [6],[7],[39]
Interest 11.30% [2],[3],[40] 11.40% [6],[7],[39]
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 [5],[6] $ 3,708  
Fair value at ending balance $ 3,531 [2],[27] $ 3,708 [5],[6]
Interest 7.00% [2],[27] 7.00% [5],[6]
Interest 12.40% [2],[27] 12.50% [5],[6]
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[19] $ 21  
Investment owned, balance (in shares) [4],[9],[11],[12],[19] 205  
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 4,108  
Interest [2],[4],[27] 5.25%  
Interest [2],[4],[27] 10.60%  
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[19] $ 184  
Investment owned, balance (in shares) [4],[9],[11],[12],[19] 1,842  
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Aerospace & Defense, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ (13)  
Interest [2],[4],[10],[27] 5.25%  
Interest [2],[4],[10],[27] 10.60%  
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 [7],[8],[20] $ 128  
Fair value at ending balance $ 122 [3],[4],[19] $ 128 [7],[8],[20]
Investment owned, balance (in shares) 114.4 [3],[4],[9],[11],[12],[19] 114.4 [7],[8],[13],[15],[16],[20]
Investment, interest rate, paid in kind 9.00% [3],[4],[19] 9.00% [7],[8],[20]
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 [7],[8],[20] $ 51  
Fair value at ending balance $ 46 [3],[4],[19] $ 51 [7],[8],[20]
Investment owned, balance (in shares) 28,943.8 [3],[4],[9],[11],[12],[19] 28,943.8 [7],[8],[13],[15],[16],[20]
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 [6],[7],[8],[14],[63] $ 3,041  
Fair value at ending balance $ 2,854 [2],[3],[4],[10],[64] $ 3,041 [6],[7],[8],[14],[63]
Interest 5.50% [2],[3],[4],[10],[64] 5.50% [6],[7],[8],[14],[63]
Interest 10.10% [2],[3],[4],[10],[64] 10.10% [6],[7],[8],[14],[63]
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 [6],[7],[8],[14],[41] $ 7,784  
Fair value at ending balance $ 7,458 [2],[3],[4],[10],[42] $ 7,784 [6],[7],[8],[14],[41]
Interest 5.50% [2],[3],[4],[10],[42] 5.50% [6],[7],[8],[14],[41]
Interest 10.30% [2],[3],[4],[10],[42] 10.30% [6],[7],[8],[14],[41]
Investment, Identifier [Axis]: Moonlight Bidco Limited, Healthcare, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8],[20] $ 1,380  
Fair value at ending balance $ 167 [3],[4],[19] $ 1,380 [7],[8],[20]
Investment owned, balance (in shares) 10,590 [3],[4],[9],[11],[12],[19] 107,714 [7],[8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Moonlight 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 [6],[7],[8],[14],[35] $ 1,832  
Fair value at ending balance $ 1,821 [2],[3],[4],[10],[36] $ 1,832 [6],[7],[8],[14],[35]
Interest 6.25% [2],[3],[4],[10],[36] 6.25% [6],[7],[8],[14],[35]
Interest 11.60% [2],[3],[4],[10],[36] 11.60% [6],[7],[8],[14],[35]
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 [6],[7],[8],[39] $ 1,670  
Fair value at ending balance $ 1,655 [2],[3],[4],[40] $ 1,670 [6],[7],[8],[39]
Interest 5.50% [2],[3],[4],[40] 5.25% [6],[7],[8],[39]
Interest 10.70% [2],[3],[4],[40] 10.70% [6],[7],[8],[39]
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 [5],[6],[8] $ 6,884  
Fair value at ending balance $ 6,632 [2],[4],[27] $ 6,884 [5],[6],[8]
Interest 6.00% [2],[4],[27] 6.00% [5],[6],[8]
Interest 11.50% [2],[4],[27] 11.50% [5],[6],[8]
Investment, Identifier [Axis]: NAW Buyer LLC, Technology, Equity Co Invest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 473  
Fair value at ending balance $ 430 [4],[19] $ 473 [8],[20]
Investment owned, balance (in shares) 472,512 [4],[9],[11],[12],[19] 472,512 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: NAW 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 [5],[6],[8],[14] $ 11,446  
Fair value at ending balance $ 11,681 [2],[4],[10],[27] $ 11,446 [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 11.10% [2],[4],[10],[27] 11.10% [5],[6],[8],[14]
Investment, Identifier [Axis]: NAW Buyer LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 335  
Fair value at ending balance $ 189 [2],[4],[10],[27] $ 335 [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 11.10% [2],[4],[10],[27] 11.10% [5],[6],[8],[14]
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 6,204  
Fair value at ending balance $ 6,268 [2],[4],[27] $ 6,204 [5],[6],[8]
Interest 6.00% [2],[4],[27] 6.50% [5],[6],[8]
Interest 11.30% [2],[4],[27] 11.80% [5],[6],[8]
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 633  
Fair value at ending balance $ 723 [4],[19] $ 633 [8],[20]
Investment owned, balance (in shares) 639,510 [4],[9],[11],[12],[19] 639,510 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 417  
Fair value at ending balance $ 221 [2],[4],[10],[27] $ 417 [5],[6],[8],[14]
Interest 6.00% [2],[4],[10],[27] 6.50% [5],[6],[8],[14]
Interest 11.30% [2],[4],[10],[27] 11.80% [5],[6],[8],[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 [6],[8],[28] $ 4,655  
Fair value at ending balance [6],[8],[28]   $ 4,655
Interest [6],[8],[28]   4.00%
Interest [6],[8],[28]   9.50%
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 [6],[7],[8],[14],[30] 2,175  
Fair value at ending balance $ 2,133 [1],[2],[3],[4],[10] $ 2,175 [6],[7],[8],[14],[30]
Interest 6.25% [1],[2],[3],[4],[10] 6.00% [6],[7],[8],[14],[30]
Interest 10.10% [1],[2],[3],[4],[10] 9.90% [6],[7],[8],[14],[30]
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 [6],[7],[8],[55] $ 18,321  
Fair value at ending balance $ 17,976 [2],[3],[4],[56] $ 18,321 [6],[7],[8],[55]
Interest 5.00% [2],[3],[4],[56] 5.50% [6],[7],[8],[55]
Interest 9.40% [2],[3],[4],[56] 9.90% [6],[7],[8],[55]
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 [8],[20] $ 535  
Fair value at ending balance $ 546 [4],[19] $ 535 [8],[20]
Investment owned, balance (in shares) 4,587.38 [4],[9],[11],[12],[19] 4,587.38 [8],[13],[15],[16],[20]
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 [8],[20] $ 229  
Fair value at ending balance $ 330 [4],[19] $ 229 [8],[20]
Investment owned, balance (in shares) 509.71 [4],[9],[11],[12],[19] 509.71 [8],[13],[15],[16],[20]
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 [5],[6],[8] $ 5,562  
Fair value at ending balance $ 5,143 [2],[4],[27] $ 5,562 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.40% [2],[4],[27] 10.50% [5],[6],[8]
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 [5],[6],[8],[14] $ (8)  
Fair value at ending balance $ 0 [2],[4],[10],[27] $ (8) [5],[6],[8],[14]
Interest 5.00% [2],[4],[10],[27] 5.00% [5],[6],[8],[14]
Interest 10.40% [2],[4],[10],[27] 10.50% [5],[6],[8],[14]
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[28] $ 2,918  
Fair value at ending balance $ 2,916 [2],[4],[29] $ 2,918 [6],[8],[28]
Interest 2.00% [2],[4],[29] 2.00% [6],[8],[28]
Interest 7.40% [2],[4],[29] 7.40% [6],[8],[28]
Investment, interest rate, paid in kind 3.00% [2],[4],[29] 3.00% [6],[8],[28]
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[28] $ 2,620  
Fair value at ending balance $ 2,641 [2],[4],[29] $ 2,620 [6],[8],[28]
Interest 5.00% [2],[4],[29] 5.00% [6],[8],[28]
Interest 10.40% [2],[4],[29] 10.40% [6],[8],[28]
Investment, Identifier [Axis]: NeoxCo, 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 [6],[7],[8],[14],[37] $ 2,090  
Fair value at ending balance $ 2,055 [2],[3],[4],[10],[38] $ 2,090 [6],[7],[8],[14],[37]
Interest 6.50% [2],[3],[4],[10],[38] 6.50% [6],[7],[8],[14],[37]
Interest 10.40% [2],[3],[4],[10],[38] 10.50% [6],[7],[8],[14],[37]
Investment, Identifier [Axis]: Next Holdco, LLC,Technology,First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ 7,236  
Fair value at ending balance $ 7,255 [2],[4],[10],[29] $ 7,236 [6],[8],[14],[28]
Interest 6.00% [2],[4],[10],[29] 6.00% [6],[8],[14],[28]
Interest 11.30% [2],[4],[10],[29] 11.30% [6],[8],[14],[28]
Investment, Identifier [Axis]: Next Holdco, LLC,Technology,Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ (11)  
Fair value at ending balance $ (10) [2],[4],[10],[29] $ (11) [6],[8],[14],[28]
Interest 6.00% [2],[4],[10],[29] 6.00% [6],[8],[14],[28]
Interest 11.30% [2],[4],[10],[29] 11.30% [6],[8],[14],[28]
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 [5],[6],[8] $ 2,434  
Fair value at ending balance $ 2,444 [2],[4],[27] $ 2,434 [5],[6],[8]
Interest 4.75% [2],[4],[27] 4.75% [5],[6],[8]
Interest 10.10% [2],[4],[27] 10.10% [5],[6],[8]
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 [6],[7],[8],[14],[25] $ 3,984  
Fair value at ending balance $ 4,021 [2],[3],[4],[10],[26] $ 3,984 [6],[7],[8],[14],[25]
Interest 5.25% [2],[3],[4],[10],[26] 5.25% [6],[7],[8],[14],[25]
Interest 11.10% [2],[3],[4],[10],[26] 11.10% [6],[7],[8],[14],[25]
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 [6],[8],[28] $ 5,485  
Fair value at ending balance $ 5,518 [2],[4],[29] $ 5,485 [6],[8],[28]
Interest 5.50% [2],[4],[29] 5.50% [6],[8],[28]
Interest 10.80% [2],[4],[29] 10.90% [6],[8],[28]
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 [8],[20] $ 276  
Fair value at ending balance $ 318 [4],[19] $ 276 [8],[20]
Investment owned, balance (in shares) 210,920.11 [4],[9],[19] 210,920.11 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ (12)  
Fair value at ending balance $ 177 [2],[4],[10],[29] $ (12) [6],[8],[14],[28]
Interest 5.50% [2],[4],[10],[29] 5.50% [6],[8],[14],[28]
Interest 10.80% [2],[4],[10],[29] 10.90% [6],[8],[14],[28]
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 [5],[6],[8] $ 3,454  
Fair value at ending balance $ 3,525 [2],[4],[27] $ 3,454 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.40% [2],[4],[27] 10.50% [5],[6],[8]
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 [5],[6],[8],[14] $ (47)  
Fair value at ending balance $ 274 [2],[4],[10],[27] $ (47) [5],[6],[8],[14]
Interest 5.00% [2],[4],[10],[27] 5.00% [5],[6],[8],[14]
Interest 10.40% [2],[4],[10],[27] 10.50% [5],[6],[8],[14]
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 [6],[7],[8],[30] $ 3,390  
Fair value at ending balance $ 3,314 [1],[2],[3],[4] $ 3,390 [6],[7],[8],[30]
Interest 5.75% [1],[2],[3],[4] 5.75% [6],[7],[8],[30]
Interest 9.70% [1],[2],[3],[4] 9.70% [6],[7],[8],[30]
Investment, Identifier [Axis]: ORTEC INTERNATIONAL NEWCO 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 [6],[7],[8],[30] $ 985  
Fair value at ending balance $ 965 [1],[2],[3],[4] $ 985 [6],[7],[8],[30]
Interest 5.75% [1],[2],[3],[4] 5.75% [6],[7],[8],[30]
Interest 9.70% [1],[2],[3],[4] 9.70% [6],[7],[8],[30]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, 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 [5],[6],[8] $ 12,934  
Fair value at ending balance $ 12,935 [2],[4],[27] $ 12,934 [5],[6],[8]
Interest 5.50% [2],[4],[27] 6.00% [5],[6],[8]
Interest 10.90% [2],[4],[27] 11.50% [5],[6],[8]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, 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 [5],[6],[8],[14] $ (107)  
Fair value at ending balance $ (94) [2],[4],[10],[27] $ (107) [5],[6],[8],[14]
Interest 5.50% [2],[4],[10],[27] 6.00% [5],[6],[8],[14]
Interest 10.90% [2],[4],[10],[27] 11.50% [5],[6],[8],[14]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (22)  
Fair value at ending balance $ (15) [2],[4],[10],[27] $ (22) [5],[6],[8],[14]
Interest 5.50% [2],[4],[10],[27] 6.00% [5],[6],[8],[14]
Interest 10.90% [2],[4],[10],[27] 11.50% [5],[6],[8],[14]
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 [8] $ 174  
Fair value at ending balance $ 179 [4] $ 174 [8]
Investment owned, balance (in shares) 173,749 [4],[9],[11],[12] 173,749 [8],[13],[15],[16]
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 0  
Fair value at ending balance $ 0 [4],[19] $ 0 [8],[20]
Investment owned, balance (in shares) 186.67 [4],[9],[11],[12],[19] 186.67 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] $ 2,085  
Fair value at ending balance $ 2,053 [4] $ 2,085 [8]
Investment owned, balance (in shares) 8,550.57 [4],[9],[11],[12] 243.81 [8],[13],[15],[16]
Investment, interest rate, paid in kind 15.00% [4] 15.00% [8]
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Super Senior Takeback Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] $ 549  
Fair value at ending balance $ 549 [4] $ 549 [8]
Interest 10.00% [4] 10.00% [8]
Investment, Identifier [Axis]: Ocelot Holdco LLC, Construction Machinery, Takeback Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] $ 2,933  
Fair value at ending balance $ 2,933 [4] $ 2,933 [8]
Interest 10.00% [4] 10.00% [8]
Investment, Identifier [Axis]: Ocular Therapeutix, Inc., Pharma-ceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[28] $ 3,812  
Fair value at ending balance $ 3,812 [2],[3],[4],[29] $ 3,812 [6],[7],[8],[28]
Interest 6.75% [2],[3],[4],[29] 6.75% [6],[7],[8],[28]
Interest 12.10% [2],[3],[4],[29] 12.10% [6],[7],[8],[28]
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 [8],[18],[25] $ 3,691  
Fair value at ending balance $ 3,688 [4],[26],[56] $ 3,691 [8],[18],[25]
Interest 5.00% [4],[26],[56] 5.00% [8],[18],[25]
Interest 10.40% [4],[26],[56] 10.50% [8],[18],[25]
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 [5],[6],[8] $ 7,864  
Fair value at ending balance [5],[6],[8]   $ 7,864
Interest [5],[6],[8]   5.00%
Interest [5],[6],[8]   10.50%
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 [6],[7],[8],[25] 2,249  
Fair value at ending balance $ 2,252 [2],[3],[4],[26] $ 2,249 [6],[7],[8],[25]
Interest 4.75% [2],[3],[4],[26] 4.75% [6],[7],[8],[25]
Interest 10.10% [2],[3],[4],[26] 10.20% [6],[7],[8],[25]
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 [6],[7],[8],[39] $ 2,918  
Fair value at ending balance $ 2,891 [2],[3],[4],[40] $ 2,918 [6],[7],[8],[39]
Interest 4.75% [2],[3],[4],[40] 4.75% [6],[7],[8],[39]
Interest 9.90% [2],[3],[4],[40] 9.90% [6],[7],[8],[39]
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 [6],[7],[8],[30] $ 326  
Fair value at ending balance $ 320 [1],[2],[3],[4] $ 326 [6],[7],[8],[30]
Interest 5.25% [1],[2],[3],[4] 5.25% [6],[7],[8],[30]
Interest 9.20% [1],[2],[3],[4] 9.20% [6],[7],[8],[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 [5],[6],[7],[8] $ 531  
Fair value at ending balance $ 533 [2],[3],[4],[27] $ 531 [5],[6],[7],[8]
Interest 5.25% [2],[3],[4],[27] 5.25% [5],[6],[7],[8]
Interest 10.70% [2],[3],[4],[27] 10.70% [5],[6],[7],[8]
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 [8] $ 44  
Fair value at ending balance $ 46 [4] $ 44 [8]
Investment owned, balance (in shares) 28.8 [4],[9],[11],[12] 28.8 [8],[13],[15],[16]
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 [5],[6],[8],[14] $ 10,319  
Fair value at ending balance $ 2,884 [2],[4],[10],[27] $ 10,319 [5],[6],[8],[14]
Interest 5.21% [2],[4],[10],[27] 5.21% [5],[6],[8],[14]
Interest 10.50% [2],[4],[10],[27] 10.70% [5],[6],[8],[14]
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 2,930  
Fair value at ending balance $ 7,343 [2],[4],[27] $ 2,930 [5],[6],[8],[14]
Interest 5.21% [2],[4],[27] 5.75% [5],[6],[8],[14]
Interest 10.50% [2],[4],[27] 11.20% [5],[6],[8],[14]
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[27] $ 2,980  
Interest [2],[4],[10],[27] 5.50%  
Interest [2],[4],[10],[27] 10.80%  
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 [6],[7],[8],[14],[54] $ 820  
Fair value at ending balance $ 831 [2],[3],[4],[10],[43] $ 820 [6],[7],[8],[14],[54]
Interest 6.25% [2],[3],[4],[10],[43] 6.00% [6],[7],[8],[14],[54]
Interest 10.20% [2],[3],[4],[10],[43] 9.90% [6],[7],[8],[14],[54]
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 [6],[7],[8],[28] $ 1,305  
Fair value at ending balance $ 1,343 [2],[3],[4],[29] $ 1,305 [6],[7],[8],[28]
Interest 6.25% [2],[3],[4],[29] 6.00% [6],[7],[8],[28]
Interest 11.60% [2],[3],[4],[29] 11.40% [6],[7],[8],[28]
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 [8] $ 4,224  
Fair value at ending balance $ 3,933 [4] $ 4,224 [8]
Interest 6.90% [4] 6.90% [8]
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[37] $ 2,804  
Fair value at ending balance $ 2,743 [2],[3],[4],[38] $ 2,804 [6],[7],[8],[37]
Interest 5.25% [2],[3],[4],[38] 5.25% [6],[7],[8],[37]
Interest 9.20% [2],[3],[4],[38] 9.20% [6],[7],[8],[37]
Investment, interest rate, paid in kind 0.80% [2],[3],[4],[38] 0.80% [6],[7],[8],[37]
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[7],[8] $ 1,482  
Fair value at ending balance $ 1,476 [2],[3],[4],[27] $ 1,482 [5],[6],[7],[8]
Interest 5.25% [2],[3],[4],[27] 5.25% [5],[6],[7],[8]
Interest 10.60% [2],[3],[4],[27] 10.60% [5],[6],[7],[8]
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 605  
Fair value at ending balance $ 23 [2],[4],[10],[27] $ 605 [5],[6],[8],[14]
Interest 6.50% [2],[4],[10],[27] 8.30% [5],[6],[8],[14]
Interest 11.80% [2],[4],[10],[27] 13.60% [5],[6],[8],[14]
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Healthcare, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 585  
Interest [2],[4],[27] 8.30%  
Interest [2],[4],[27] 13.60%  
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, Healthcare, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 298  
Fair value at ending balance $ 293 [4],[19] $ 298 [8],[20]
Investment owned, balance (in shares) 29,762 [4],[9],[11],[12],[19] 29,762 [8],[13],[15],[16],[20]
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 [6],[7],[8],[30] $ 2,327  
Fair value at ending balance $ 2,274 [1],[2],[3],[4] $ 2,327 [6],[7],[8],[30]
Interest 6.75% [1],[2],[3],[4] 6.75% [6],[7],[8],[30]
Interest 10.70% [1],[2],[3],[4] 10.70% [6],[7],[8],[30]
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 [5],[6],[7],[8] $ 2,804  
Fair value at ending balance $ 2,802 [2],[3],[4],[27] $ 2,804 [5],[6],[7],[8]
Interest 6.75% [2],[3],[4],[27] 6.75% [5],[6],[7],[8]
Interest 12.30% [2],[3],[4],[27] 12.30% [5],[6],[7],[8]
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 [7],[8] $ 172  
Fair value at ending balance $ 175 [3],[4] $ 172 [7],[8]
Interest 4.70% [3],[4] 4.70% [7],[8]
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 [7],[8] $ 173  
Fair value at ending balance $ 176 [3],[4] $ 173 [7],[8]
Interest 5.40% [3],[4] 5.40% [7],[8]
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 [7],[8] $ 167  
Fair value at ending balance $ 175 [3],[4] $ 167 [7],[8]
Interest 5.90% [3],[4] 5.90% [7],[8]
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 [7],[8] $ 166  
Fair value at ending balance $ 174 [3],[4] $ 166 [7],[8]
Interest 8.50% [3],[4] 8.50% [7],[8]
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 [7],[8] $ 8,503  
Fair value at ending balance $ 8,893 [3],[4] $ 8,503 [7],[8]
Interest 11.40% [3],[4] 11.40% [7],[8]
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 [6],[7],[8],[55] $ 2,743  
Fair value at ending balance $ 2,646 [2],[3],[4],[56] $ 2,743 [6],[7],[8],[55]
Interest 6.25% [2],[3],[4],[56] 6.25% [6],[7],[8],[55]
Interest 10.70% [2],[3],[4],[56] 10.70% [6],[7],[8],[55]
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 [5],[6],[8] $ 1,118  
Fair value at ending balance $ 1,115 [2],[4],[27] $ 1,118 [5],[6],[8]
Interest 4.75% [2],[4],[27] 4.75% [5],[6],[8]
Interest 10.20% [2],[4],[27] 10.20% [5],[6],[8]
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 [8] $ 1,285  
Fair value at ending balance $ 1,210 [4] $ 1,285 [8]
Investment owned, balance (in shares) 7,409 [4],[9],[11],[12] 7,409 [8],[13],[15],[16]
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 [5],[6],[8],[14] $ 0  
Fair value at ending balance $ 0 [2],[4],[10],[27] $ 0 [5],[6],[8],[14]
Interest 4.75% [2],[4],[10],[27] 4.75% [5],[6],[8],[14]
Interest 10.20% [2],[4],[10],[27] 10.20% [5],[6],[8],[14]
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 [5],[6],[8] $ 50,498  
Fair value at ending balance $ 51,103 [2],[4],[27] $ 50,498 [5],[6],[8]
Interest 6.00% [2],[4],[27] 6.00% [5],[6],[8]
Interest 11.30% [2],[4],[27] 11.60% [5],[6],[8]
Investment, interest rate, paid in kind 4.00% [2],[4],[27] 4.00% [5],[6],[8]
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 [8],[20] $ 1,297  
Fair value at ending balance $ 1,299 [4],[19] $ 1,297 [8],[20]
Investment owned, balance (in shares) 2.55830 [4],[9],[11],[12],[19] 2.55830 [8],[13],[15],[16],[20]
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 [8],[20] $ 438  
Fair value at ending balance $ 438 [4],[19] $ 438 [8],[20]
Investment owned, balance (in shares) 0.86340 [4],[9],[11],[12],[19] 0.86340 [8],[13],[15],[16],[20]
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 [8],[20] $ 0  
Fair value at ending balance $ 0 [4],[19] $ 0 [8],[20]
Investment owned, balance (in shares) 0.08870 [4],[9],[11],[12],[19] 0.08870 [8],[13],[15],[16],[20]
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 [8],[20] $ 125  
Fair value at ending balance $ 125 [4],[19] $ 125 [8],[20]
Investment owned, balance (in shares) 0.24710 [4],[9],[11],[12],[19] 0.24710 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, Chemicals, Plastics & Rubber, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 0  
Fair value at ending balance $ 0 [4],[19] $ 0 [8],[20]
Investment owned, balance (in shares) 10,000 [4],[9],[11],[12],[19] 74 [8],[13],[15],[16],[20]
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 [6],[8],[18],[28] $ 936  
Fair value at ending balance $ 884 [2],[4],[17],[29] $ 936 [6],[8],[18],[28]
Interest 7.00% [2],[4],[17],[29] 7.00% [6],[8],[18],[28]
Interest 12.40% [2],[4],[17],[29] 12.40% [6],[8],[18],[28]
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 [5],[6],[8] $ 7,511  
Fair value at ending balance $ 7,517 [2],[4],[27] $ 7,511 [5],[6],[8]
Interest 6.25% [2],[4],[27] 6.75% [5],[6],[8]
Interest 12.50% [2],[4],[27] 12.50% [5],[6],[8]
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 [6],[7],[8],[14],[37] $ 9,031  
Fair value at ending balance $ 8,921 [2],[3],[4],[10],[38] $ 9,031 [6],[7],[8],[14],[37]
Interest 6.50% [2],[3],[4],[10],[38] 6.50% [6],[7],[8],[14],[37]
Interest 10.40% [2],[3],[4],[10],[38] 10.50% [6],[7],[8],[14],[37]
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 [6],[7],[8],[25] $ 2,778  
Fair value at ending balance $ 2,789 [2],[3],[4],[26] $ 2,778 [6],[7],[8],[25]
Interest 5.00% [2],[3],[4],[26] 5.25% [6],[7],[8],[25]
Interest 10.30% [2],[3],[4],[26] 11.00% [6],[7],[8],[25]
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 [5],[6],[8] $ 5,462  
Fair value at ending balance $ 5,445 [2],[4],[27] $ 5,462 [5],[6],[8]
Interest 5.25% [2],[4],[27] 5.25% [5],[6],[8]
Interest 10.60% [2],[4],[27] 11.00% [5],[6],[8]
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 340  
Fair value at ending balance $ 338 [4],[19] $ 340 [8],[20]
Investment owned, balance (in shares) 281 [4],[9],[11],[12],[19] 281 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 5,293  
Fair value at ending balance $ 5,362 [2],[4],[10],[27] $ 5,293 [5],[6],[8],[14]
Interest 6.00% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.30% [2],[4],[10],[27] 11.60% [5],[6],[8],[14]
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Electronics, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (6)  
Fair value at ending balance $ 159 [2],[4],[10],[27] $ (6) [5],[6],[8],[14]
Interest 6.00% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.30% [2],[4],[10],[27] 11.60% [5],[6],[8],[14]
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 [5],[6],[8] $ 1,783  
Fair value at ending balance [5],[6],[8]   $ 1,783
Interest [5],[6],[8]   4.50%
Interest [5],[6],[8]   10.10%
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 [6],[8],[25] 1,635  
Fair value at ending balance $ 1,626 [2],[4],[26] $ 1,635 [6],[8],[25]
Interest 5.75% [2],[4],[26] 5.75% [6],[8],[25]
Interest 11.20% [2],[4],[26] 11.50% [6],[8],[25]
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 220  
Fair value at ending balance $ 220 [4],[19] $ 220 [8],[20]
Investment owned, balance (in shares) 241,935.48 [4],[9],[11],[12],[19] 241,935.48 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[25] $ 274  
Fair value at ending balance $ 395 [2],[4],[10],[26] $ 274 [6],[8],[14],[25]
Interest 5.75% [2],[4],[10],[26] 5.75% [6],[8],[14],[25]
Interest 11.20% [2],[4],[10],[26] 11.50% [6],[8],[14],[25]
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 [8] $ 73  
Fair value at ending balance $ 73 [4] $ 73 [8]
Interest 8.00% [4] 8.00% [8]
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 [8],[18] $ 0  
Fair value at ending balance $ 0 [4],[17] $ 0 [8],[18]
Investment owned, balance (in shares) 1,668,106 [4],[9],[11],[12],[17] 1,668,106 [8],[13],[15],[16],[18]
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 [6],[7],[8],[14],[37] $ 1,630  
Fair value at ending balance $ 1,719 [2],[3],[4],[10],[38] $ 1,630 [6],[7],[8],[14],[37]
Interest 6.75% [2],[3],[4],[10],[38] 6.75% [6],[7],[8],[14],[37]
Interest 10.70% [2],[3],[4],[10],[38] 10.80% [6],[7],[8],[14],[37]
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 [6],[7],[8],[37] $ 2,110  
Fair value at ending balance $ 2,084 [2],[3],[4],[38] $ 2,110 [6],[7],[8],[37]
Interest 6.50% [2],[3],[4],[38] 6.50% [6],[7],[8],[37]
Interest 10.40% [2],[3],[4],[38] 10.50% [6],[7],[8],[37]
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 [6],[7],[8],[31] $ 1,852  
Fair value at ending balance $ 1,781 [2],[3],[4],[32] $ 1,852 [6],[7],[8],[31]
Interest 3.75% [2],[3],[4],[32] 4.50% [6],[7],[8],[31]
Interest 8.10% [2],[3],[4],[32] 8.80% [6],[7],[8],[31]
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 64  
Fair value at ending balance $ 85 [4],[19] $ 64 [8],[20]
Investment owned, balance (in shares) 303,030 [4],[9],[11],[12],[19] 303,030 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Qualified Industries, 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 [5],[6],[8] $ 592  
Fair value at ending balance $ 588 [2],[4],[27] $ 592 [5],[6],[8]
Interest 5.75% [2],[4],[27] 5.75% [5],[6],[8]
Interest 11.20% [2],[4],[27] 11.20% [5],[6],[8]
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 159  
Fair value at ending balance $ 163 [4],[19] $ 159 [8],[20]
Investment owned, balance (in shares) 148 [4],[9],[11],[12],[19] 148 [8],[13],[15],[16],[20]
Investment, interest rate, paid in kind 10.00% [4],[19] 10.00% [8],[20]
Investment, Identifier [Axis]: Qualified Industries, LLC, Consumer Cyclical, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (2)  
Fair value at ending balance $ (5) [2],[4],[10],[27] $ (2) [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 11.20% [2],[4],[10],[27] 11.20% [5],[6],[8],[14]
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 [5],[6],[7],[8] $ 6,732  
Fair value at ending balance $ 6,741 [2],[3],[4],[27] $ 6,732 [5],[6],[7],[8]
Interest 4.00% [2],[3],[4],[27] 6.25% [5],[6],[7],[8]
Interest 9.30% [2],[3],[4],[27] 11.70% [5],[6],[7],[8]
Investment, interest rate, paid in kind [2],[3],[4],[27] 2.40%  
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[25] $ 6,001  
Fair value at ending balance $ 6,218 [2],[4],[10],[26] $ 6,001 [6],[8],[14],[25]
Interest 6.25% [2],[4],[10],[26] 6.25% [6],[8],[14],[25]
Interest 11.60% [2],[4],[10],[26] 11.60% [6],[8],[14],[25]
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[25] $ 80  
Fair value at ending balance $ 118 [2],[4],[10],[26] $ 80 [6],[8],[14],[25]
Interest 6.25% [2],[4],[10],[26] 6.25% [6],[8],[14],[25]
Interest 11.60% [2],[4],[10],[26] 11.60% [6],[8],[14],[25]
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 [5],[6],[8],[18] $ 12,723  
Fair value at ending balance $ 12,723 [2],[4],[17],[27] $ 12,723 [5],[6],[8],[18]
Interest 6.75% [2],[4],[17],[27] 6.75% [5],[6],[8],[18]
Interest 12.10% [2],[4],[17],[27] 12.00% [5],[6],[8],[18]
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 [5],[6],[8],[14],[18] $ 778  
Fair value at ending balance $ 1,216 [2],[4],[10],[17],[27] $ 778 [5],[6],[8],[14],[18]
Interest 6.75% [2],[4],[10],[17],[27] 6.75% [5],[6],[8],[14],[18]
Interest 12.10% [2],[4],[10],[17],[27] 12.00% [5],[6],[8],[14],[18]
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 [6],[8],[30] $ 9,498  
Fair value at ending balance $ 9,296 [1],[2],[4] $ 9,498 [6],[8],[30]
Interest 5.00% [1],[2],[4] 5.00% [6],[8],[30]
Interest 8.90% [1],[2],[4] 8.90% [6],[8],[30]
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 [5],[6],[8] $ 1,949  
Fair value at ending balance $ 1,946 [2],[4],[27] $ 1,949 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.40% [2],[4],[27] 10.40% [5],[6],[8]
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 [5],[6],[8] $ 4,732  
Fair value at ending balance $ 4,413 [2],[4],[27] $ 4,732 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 10.80% [2],[4],[27] 11.00% [5],[6],[8]
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 [8],[18],[20] $ 0  
Fair value at ending balance $ 0 [4],[17],[19] $ 0 [8],[18],[20]
Investment owned, balance (in shares) 145.347 [4],[9],[11],[12],[17],[19] 145.347 [8],[13],[15],[16],[18],[20]
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 [8],[18],[20] $ 0  
Fair value at ending balance $ 0 [4],[17],[19] $ 0 [8],[18],[20]
Investment owned, balance (in shares) 145.347 [4],[9],[11],[12],[17],[19] 145.347 [8],[13],[15],[16],[18],[20]
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 [8],[18],[20] $ 73  
Fair value at ending balance $ 69 [4],[17],[19] $ 73 [8],[18],[20]
Investment owned, balance (in shares) 7,844.03 [4],[9],[11],[12],[17],[19] 7,844.03 [8],[13],[15],[16],[18],[20]
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 [8],[18],[20] $ 0  
Fair value at ending balance $ 0 [4],[17],[19] $ 0 [8],[18],[20]
Investment owned, balance (in shares) 153 [4],[9],[11],[12],[17],[19] 153 [8],[13],[15],[16],[18],[20]
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 [5],[6],[8],[18] $ 8,717  
Fair value at ending balance $ 8,367 [2],[4],[17],[27] $ 8,717 [5],[6],[8],[18]
Interest 7.75% [2],[4],[17],[27] 7.75% [5],[6],[8],[18]
Interest 13.10% [2],[4],[17],[27] 13.10% [5],[6],[8],[18]
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 [5],[6],[8],[14],[18] $ 524  
Fair value at ending balance $ 3,008 [2],[4],[10],[17],[27] $ 524 [5],[6],[8],[14],[18]
Interest 7.75% [2],[4],[10],[17],[27] 7.75% [5],[6],[8],[14],[18]
Interest 13.10% [2],[4],[10],[17],[27] 13.10% [5],[6],[8],[14],[18]
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 9,890  
Fair value at ending balance $ 389 [2],[4],[10],[27] $ 9,890 [5],[6],[8],[14]
Interest 6.50% [2],[4],[10],[27] 6.50% [5],[6],[8],[14]
Interest 11.80% [2],[4],[10],[27] 11.90% [5],[6],[8],[14]
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 10,039  
Interest [2],[4],[27] 6.50%  
Interest [2],[4],[27] 11.80%  
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 570  
Fair value at ending balance $ 534 [4],[19] $ 570 [8],[20]
Investment owned, balance (in shares) 5,333 [4],[9],[11],[12],[19] 5,333 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 505  
Fair value at ending balance $ 492 [2],[4],[10],[27] $ 505 [5],[6],[8],[14]
Interest 6.50% [2],[4],[10],[27] 6.50% [5],[6],[8],[14]
Interest 11.80% [2],[4],[10],[27] 11.90% [5],[6],[8],[14]
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 [5],[6],[8] $ 11,442  
Fair value at ending balance $ 11,383 [2],[4],[27] $ 11,442 [5],[6],[8]
Interest 6.50% [2],[4],[27] 6.00% [5],[6],[8]
Interest 11.80% [2],[4],[27] 11.40% [5],[6],[8]
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 [8],[20] $ 103  
Fair value at ending balance $ 97 [4],[19] $ 103 [8],[20]
Investment owned, balance (in shares) 187,235 [4],[9],[11],[12],[19] 187,235 [8],[13],[15],[16],[20]
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 [5],[6],[8] $ 4,167  
Fair value at ending balance $ 4,191 [2],[4],[27] $ 4,167 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 10.90% [2],[4],[27] 11.00% [5],[6],[8]
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 [8],[20] $ 67  
Fair value at ending balance $ 59 [4],[19] $ 67 [8],[20]
Investment owned, balance (in shares) 197,368.42 [4],[9],[11],[12],[19] 197,368.42 [8],[13],[15],[16],[20]
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 [5],[6],[8],[18] $ 762  
Fair value at ending balance $ 0 [2],[4],[17],[19],[27] $ 762 [5],[6],[8],[18]
Interest [5],[6],[8],[18]   8.00%
Investment owned, balance (in shares) [9],[11],[12],[17],[19] 38,571  
Interest [5],[6],[8],[18]   13.60%
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 [5],[6],[8] $ 3,991  
Fair value at ending balance $ 4,011 [2],[4],[27] $ 3,991 [5],[6],[8]
Interest 7.00% [2],[4],[27] 7.00% [5],[6],[8]
Interest 12.40% [2],[4],[27] 12.60% [5],[6],[8]
Investment, Identifier [Axis]: Rhondda Financing No. 1 DAC, Finance Companies, Structured - Junior Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8],[14] $ 29,586  
Fair value at ending balance 28,476 [3],[4],[10] $ 29,586 [7],[8],[14]
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 [6],[7],[8],[30] 2,078  
Fair value at ending balance $ 2,025 [1],[2],[3],[4] $ 2,078 [6],[7],[8],[30]
Interest 6.25% [1],[2],[3],[4] 6.25% [6],[7],[8],[30]
Interest 10.20% [1],[2],[3],[4] 10.20% [6],[7],[8],[30]
Investment, Identifier [Axis]: Rocade Holdings LLC, Common LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] $ 844 $ 0
Gross Additions [21],[22] 0 0
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 426 844
Fair value at ending balance [21] 1,270 844
Amount of Interest or Dividends Credited to Income [21],[24] $ 0 $ 0
Investment owned, balance (in shares) 23.8 23.8
Investment, Identifier [Axis]: Rocade Holdings LLC, Other Financial, Common LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 844  
Fair value at ending balance $ 1,270 [4],[19] $ 844 [8],[20]
Investment owned, balance (in shares) 23.8 [4],[9],[11],[12],[19] 23.8 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Rocade Holdings LLC, Other Financial, Preferred LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[8],[14] $ 73,113  
Fair value at ending balance $ 75,175 [4],[10],[27] $ 73,113 [5],[8],[14]
Interest 6.00% [4],[10],[27] 6.00% [5],[8],[14]
Investment owned, balance (in shares) 67,500 [4],[9],[10],[11],[12],[27] 67,500 [5],[8],[13],[14],[15],[16]
Investment, interest rate, paid in kind 11.30% [4],[10],[27] 11.30% [5],[8],[14]
Investment, Identifier [Axis]: Rocade Holdings LLC, Preferred LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] $ 73,113 $ 0
Gross Additions [21],[22] 2,062 73,113
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 0 0
Fair value at ending balance [21] 75,175 73,113
Amount of Interest or Dividends Credited to Income [21],[24] $ 2,063 $ 5,612
Interest 6.00% 6.00%
Investment owned, balance (in shares) 67,500 67,500
Investment, interest rate, paid in kind 11.30% 11.30%
Investment, Identifier [Axis]: Rock Labor LLC, Media: Diversified & Production, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 1,534  
Fair value at ending balance $ 1,225 [4],[19] $ 1,534 [8],[20]
Investment owned, balance (in shares) 233,871 [4],[9],[11],[12],[19] 233,871 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Rock Labor LLC, 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 [6],[8],[28] $ 6,422  
Fair value at ending balance $ 6,425 [2],[4],[29] $ 6,422 [6],[8],[28]
Interest 7.50% [2],[4],[29] 7.50% [6],[8],[28]
Interest 12.70% [2],[4],[29] 12.90% [6],[8],[28]
Investment, Identifier [Axis]: Rock Labor LLC, Media: Diversified & Production, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ (30)  
Fair value at ending balance $ (27) [2],[4],[10],[29] $ (30) [6],[8],[14],[28]
Interest 7.50% [2],[4],[10],[29] 7.50% [6],[8],[14],[28]
Interest 12.70% [2],[4],[10],[29] 12.90% [6],[8],[14],[28]
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 [5],[6],[8],[14] $ 7,164  
Fair value at ending balance $ 7,174 [2],[4],[10],[27] $ 7,164 [5],[6],[8],[14]
Interest 6.00% [2],[4],[10],[27] 5.50% [5],[6],[8],[14]
Interest 11.30% [2],[4],[10],[27] 10.90% [5],[6],[8],[14]
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 [5],[6],[8],[14] $ 388  
Fair value at ending balance $ (17) [2],[4],[10],[27] $ 388 [5],[6],[8],[14]
Interest 6.00% [2],[4],[10],[27] 5.50% [5],[6],[8],[14]
Interest 11.30% [2],[4],[10],[27] 10.90% [5],[6],[8],[14]
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 [5],[6],[8] $ 9,241  
Fair value at ending balance $ 8,465 [2],[4],[27] $ 9,241 [5],[6],[8]
Interest 6.00% [2],[4],[27] 6.00% [5],[6],[8]
Interest 11.40% [2],[4],[27] 11.40% [5],[6],[8]
Investment, interest rate, paid in kind 0.50% [2],[4],[27] 0.50% [5],[6],[8]
Investment, Identifier [Axis]: SBP Holdings LP, Industrial Other, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 13,442  
Fair value at ending balance $ 13,946 [2],[4],[27] $ 13,442 [5],[6],[8],[14]
Interest 6.75% [2],[4],[27] 6.75% [5],[6],[8],[14]
Interest 12.10% [2],[4],[27] 12.10% [5],[6],[8],[14]
Investment, Identifier [Axis]: SBP Holdings LP, Industrial Other, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (19)  
Fair value at ending balance $ 355 [2],[4],[10],[27] $ (19) [5],[6],[8],[14]
Interest 6.75% [2],[4],[10],[27] 6.75% [5],[6],[8],[14]
Interest 12.10% [2],[4],[10],[27] 12.10% [5],[6],[8],[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 [6],[8],[14],[28] $ 6,463  
Fair value at ending balance $ 6,964 [2],[4],[10],[29] $ 6,463 [6],[8],[14],[28]
Interest 5.75% [2],[4],[10],[29] 5.75% [6],[8],[14],[28]
Interest 11.10% [2],[4],[10],[29] 11.10% [6],[8],[14],[28]
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 [5],[6],[8] $ 10,592  
Fair value at ending balance [5],[6],[8]   $ 10,592
Interest [5],[6],[8]   5.75%
Interest [5],[6],[8]   11.20%
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 [6],[7],[8],[14],[35] 3,416  
Fair value at ending balance $ 4,038 [2],[3],[4],[10],[36] $ 3,416 [6],[7],[8],[14],[35]
Interest 6.00% [2],[3],[4],[10],[36] 6.00% [6],[7],[8],[14],[35]
Interest 11.30% [2],[3],[4],[10],[36] 11.30% [6],[7],[8],[14],[35]
Investment, Identifier [Axis]: SSCP Spring Bidco 3 Limited, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[39] $ 947  
Fair value at ending balance $ 942 [2],[3],[4],[40] $ 947 [6],[7],[8],[39]
Interest 6.50% [2],[3],[4],[40] 6.50% [6],[7],[8],[39]
Interest 11.70% [2],[3],[4],[40] 11.70% [6],[7],[8],[39]
Investment, Identifier [Axis]: SVI International LLC, Automotive, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[29] $ 629  
Interest [2],[4],[10],[29] 6.75%  
Interest [2],[4],[10],[29] 12.10%  
Investment, Identifier [Axis]: SVI International LLC, Automotive, LLC Units ($207,921 units)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[19] $ 208  
Investment owned, balance (in shares) [4],[9],[11],[12],[19] 207,921  
Investment, Identifier [Axis]: SVI International LLC, Automotive, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[10],[29] $ (1)  
Interest [2],[4],[10],[29] 6.75%  
Interest [2],[4],[10],[29] 12.10%  
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 [5],[6],[8] $ 11,567  
Fair value at ending balance $ 11,683 [2],[4],[27] $ 11,567 [5],[6],[8]
Interest 6.00% [2],[4],[27] 6.00% [5],[6],[8]
Interest 11.50% [2],[4],[27] 11.50% [5],[6],[8]
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 [8],[20] $ 468  
Fair value at ending balance $ 452 [4],[19] $ 468 [8],[20]
Investment owned, balance (in shares) 378.7 [4],[9],[11],[12],[19] 378.7 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[3],[4],[60] $ 1,995  
Interest [2],[3],[4],[60] 5.75%  
Interest [2],[3],[4],[60] 7.20%  
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 [6],[7],[8],[14],[30] $ 2,585  
Fair value at ending balance $ 3,541 [1],[2],[3],[4],[10] $ 2,585 [6],[7],[8],[14],[30]
Interest 5.75% [1],[2],[3],[4],[10] 5.50% [6],[7],[8],[14],[30]
Interest 9.70% [1],[2],[3],[4],[10] 9.40% [6],[7],[8],[14],[30]
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 [6],[7],[8],[59] $ 3,357  
Fair value at ending balance $ 783 [2],[3],[4],[60] $ 3,357 [6],[7],[8],[59]
Interest 6.75% [2],[3],[4],[60] 5.50% [6],[7],[8],[59]
Interest 8.20% [2],[3],[4],[60] 7.20% [6],[7],[8],[59]
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 [5],[6],[8] $ 1,759  
Fair value at ending balance $ 1,727 [2],[4],[27] $ 1,759 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 10.90% [2],[4],[27] 10.90% [5],[6],[8]
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 [5],[6],[8],[14] $ 48  
Fair value at ending balance $ 43 [2],[4],[10],[27] $ 48 [5],[6],[8],[14]
Interest 5.50% [2],[4],[10],[27] 5.50% [5],[6],[8],[14]
Interest 10.90% [2],[4],[10],[27] 10.90% [5],[6],[8],[14]
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[30] $ 3,480  
Fair value at ending balance $ 3,383 [1],[2],[3],[4] $ 3,480 [6],[7],[8],[30]
Interest 5.75% [1],[2],[3],[4] 5.75% [6],[7],[8],[30]
Interest 9.70% [1],[2],[3],[4] 9.70% [6],[7],[8],[30]
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[7],[8] $ 437  
Fair value at ending balance $ 434 [2],[3],[4],[27] $ 437 [5],[6],[7],[8]
Interest 5.75% [2],[3],[4],[27] 5.75% [5],[6],[7],[8]
Interest 11.10% [2],[3],[4],[27] 11.10% [5],[6],[7],[8]
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 [6],[7],[8],[14],[30] $ 410  
Fair value at ending balance $ 397 [1],[2],[3],[4],[10] $ 410 [6],[7],[8],[14],[30]
Interest 5.75% [1],[2],[3],[4],[10] 5.75% [6],[7],[8],[14],[30]
Interest 9.70% [1],[2],[3],[4],[10] 9.70% [6],[7],[8],[14],[30]
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan, 2023 Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [46] $ 3,866 $ 0
Gross Additions [46],[47] 0 3,840
Gross Reductions [46],[48] 0 (22)
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] (87) 48
Fair value at ending balance [46] 3,779 3,866
Amount of Interest or Dividends Credited to Income [46],[49] $ 88 $ 168
Interest 6.00% 6.00%
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 [46] $ 6,328 $ 6,020
Gross Additions [46],[47] 0 308
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] 0 0
Fair value at ending balance [46] 6,328 6,328
Amount of Interest or Dividends Credited to Income [46],[49] $ 80 $ 309
Investment, interest rate, paid in kind 5.00% 5.00%
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 [46] $ 311 $ 575
Gross Additions [46],[47] 0 0
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] 71 (264)
Fair value at ending balance [46] 382 311
Amount of Interest or Dividends Credited to Income [46],[49] $ 0 $ 0
Investment owned, balance (in shares) 17,100 17,100
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series B, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [46] $ 29,080 $ 53,728
Gross Additions [46],[47] 0 0
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] 6,601 (24,648)
Fair value at ending balance [46] 35,681 29,080
Amount of Interest or Dividends Credited to Income [46],[49] $ 0 $ 0
Investment owned, balance (in shares) 1,236 1,236
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 [46] $ 10,867 $ 10,534
Gross Additions [46],[47] 151 333
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] 0 0
Fair value at ending balance [46] 11,018 10,867
Amount of Interest or Dividends Credited to Income [46],[49] $ 97 $ 379
Investment, interest rate, paid in kind 3.10% 3.10%
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 [46] $ 2,236 $ 2,015
Gross Additions [46],[47] 99 154
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] (50) 67
Fair value at ending balance [46] 2,285 2,236
Amount of Interest or Dividends Credited to Income [46],[49] $ 101 $ 374
Interest 6.00% 6.00%
Investment, interest rate, paid in kind 9.00% 9.00%
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 [7],[8],[61] $ 6,328  
Fair value at ending balance $ 6,328 [3],[4],[62] $ 6,328 [7],[8],[61]
Investment, interest rate, paid in kind 5.00% [3],[4],[62] 5.00% [7],[8],[61]
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 [7],[8],[20],[61] $ 311  
Fair value at ending balance $ 382 [3],[4],[10],[19],[62] $ 311 [7],[8],[20],[61]
Investment owned, balance (in shares) 17,100 [3],[4],[9],[10],[11],[12],[19],[62] 17,100 [7],[8],[13],[15],[16],[20],[61]
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 [7],[8],[20],[61] $ 29,080  
Fair value at ending balance $ 35,681 [3],[4],[10],[19],[62] $ 29,080 [7],[8],[20],[61]
Investment owned, balance (in shares) 1,236 [3],[4],[9],[10],[11],[12],[19],[62] 1,236 [7],[8],[13],[15],[16],[20],[61]
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8],[14],[61] $ 3,866  
Fair value at ending balance $ 3,779 [3],[4],[10],[62] $ 3,866 [7],[8],[14],[61]
Interest 6.00% [3],[4],[10],[62] 6.00% [7],[8],[14],[61]
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 [7],[8],[61] $ 10,867  
Fair value at ending balance $ 11,018 [3],[4],[62] $ 10,867 [7],[8],[61]
Investment, interest rate, paid in kind 3.10% [3],[4],[62] 3.10% [7],[8],[61]
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],[8],[14],[61] $ 2,236  
Fair value at ending balance $ 2,285 [3],[4],[10],[62] $ 2,236 [7],[8],[14],[61]
Interest 6.00% [3],[4],[10],[62] 6.00% [7],[8],[14],[61]
Investment, interest rate, paid in kind 9.00% [3],[4],[10],[62] 9.00% [7],[8],[14],[61]
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 [6],[7],[8],[37] $ 2,522  
Fair value at ending balance $ 2,490 [2],[3],[4],[38] $ 2,522 [6],[7],[8],[37]
Interest 6.75% [2],[3],[4],[38] 6.25% [6],[7],[8],[37]
Interest 10.70% [2],[3],[4],[38] 10.30% [6],[7],[8],[37]
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Home Furnishings, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 791  
Fair value at ending balance $ 682 [4],[19] $ 791 [8],[20]
Investment owned, balance (in shares) 109,127 [4],[9],[11],[12],[19] 109,127 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8],[20] $ 1,548  
Fair value at ending balance $ 2,676 [3],[4],[19] $ 1,548 [7],[8],[20]
Investment owned, balance (in shares) 1,200,000 [3],[4],[9],[11],[12],[19] 1,200,000 [7],[8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[7],[8] $ 34,019  
Fair value at ending balance $ 35,319 [2],[3],[4],[27] $ 34,019 [5],[6],[7],[8]
Interest 6.00% [2],[3],[4],[27] 6.00% [5],[6],[7],[8]
Interest 11.70% [2],[3],[4],[27] 11.70% [5],[6],[7],[8]
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Joint Venture, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[18] $ 39,172  
Fair value at ending balance 42,000 [3],[17] $ 39,172 [7],[18]
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 39,172 37,950
Gross Additions [22] 0 0
Gross Reductions [23] 0 (1,780)
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 2,828 3,002
Fair value at ending balance 42,000 39,172
Amount of Interest or Dividends Credited to Income [24] 445 5,655
Investment, Identifier [Axis]: Sinari Invest, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[37] 1,822  
Fair value at ending balance $ 1,786 [2],[3],[4],[10],[38] $ 1,822 [6],[7],[8],[14],[37]
Interest 6.00% [2],[3],[4],[10],[38] 6.00% [6],[7],[8],[14],[37]
Interest 9.90% [2],[3],[4],[10],[38] 9.90% [6],[7],[8],[14],[37]
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 288  
Fair value at ending balance $ 392 [4],[19] $ 288 [8],[20]
Investment owned, balance (in shares) 275 [4],[9],[11],[12],[19] 275 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 9,332  
Fair value at ending balance $ 9,715 [2],[4],[10],[27] $ 9,332 [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.60% [2],[4],[10],[27] 11.60% [5],[6],[8],[14]
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (38)  
Fair value at ending balance $ 0 [2],[4],[10],[27] $ (38) [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.60% [2],[4],[10],[27] 11.60% [5],[6],[8],[14]
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 [6],[8],[28] $ 10,466  
Fair value at ending balance $ 10,477 [2],[4],[29] $ 10,466 [6],[8],[28]
Interest 4.50% [2],[4],[29] 4.50% [6],[8],[28]
Interest 9.90% [2],[4],[29] 9.90% [6],[8],[28]
Investment, Identifier [Axis]: Smartling, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ (12)  
Fair value at ending balance $ (5) [2],[4],[10],[29] $ (12) [6],[8],[14],[28]
Interest 4.50% [2],[4],[10],[29] 4.50% [6],[8],[14],[28]
Interest 9.90% [2],[4],[10],[29] 9.90% [6],[8],[14],[28]
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 [5],[6],[8] $ 4,533  
Fair value at ending balance $ 4,077 [2],[4],[27] $ 4,533 [5],[6],[8]
Interest 4.50% [2],[4],[27] 4.50% [5],[6],[8]
Interest 9.90% [2],[4],[27] 10.00% [5],[6],[8]
Investment, interest rate, paid in kind 1.00% [2],[4],[27] 1.00% [5],[6],[8]
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 ending balance [2],[4],[27] $ 552  
Interest [2],[4],[27] 4.50%  
Interest [2],[4],[27] 9.90%  
Investment, interest rate, paid in kind [2],[4],[27] 1.00%  
Investment, Identifier [Axis]: Soho Square III Debtco II SARL, Diversified Capital Markets, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[8] $ 8,175  
Fair value at ending balance $ 8,214 [3],[4] $ 8,175 [7],[8]
Investment, interest rate, paid in kind 9.50% [3],[4] 9.50% [7],[8]
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 15,140  
Fair value at ending balance $ 15,296 [2],[4],[27] $ 15,140 [5],[6],[8]
Interest 6.25% [2],[4],[27] 6.25% [5],[6],[8]
Interest 11.60% [2],[4],[27] 11.70% [5],[6],[8]
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 382  
Fair value at ending balance $ 516 [4],[19] $ 382 [8],[20]
Investment owned, balance (in shares) 516,399 [4],[9],[11],[12],[19] 516,399 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 615  
Fair value at ending balance $ 665 [2],[4],[10],[27] $ 615 [5],[6],[8],[14]
Interest 6.25% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.60% [2],[4],[10],[27] 11.70% [5],[6],[8],[14]
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 [7],[18],[20] $ 579  
Fair value at ending balance 404 [3],[17],[19] $ 579 [7],[18],[20]
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] 1,858  
Fair value at ending balance $ 1,612 [2],[4],[10],[27] $ 1,858 [5],[6],[8],[14]
Interest 5.00% [2],[4],[10],[27] 5.00% [5],[6],[8],[14]
Interest 10.30% [2],[4],[10],[27] 10.30% [5],[6],[8],[14]
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 246  
Interest [2],[4],[27] 5.00%  
Interest [2],[4],[27] 10.30%  
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 62  
Fair value at ending balance $ 35 [2],[4],[10],[27] $ 62 [5],[6],[8],[14]
Interest 5.00% [2],[4],[10],[27] 5.00% [5],[6],[8],[14]
Interest 10.30% [2],[4],[10],[27] 10.30% [5],[6],[8],[14]
Investment, Identifier [Axis]: Spatial Business Systems LLC, Electric, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ 11,461  
Fair value at ending balance $ 11,461 [2],[4],[10],[29] $ 11,461 [6],[8],[14],[28]
Interest 5.50% [2],[4],[10],[29] 5.50% [6],[8],[14],[28]
Interest 10.80% [2],[4],[10],[29] 10.90% [6],[8],[14],[28]
Investment, Identifier [Axis]: Spatial Business Systems LLC, Electric, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ (21)  
Fair value at ending balance $ (18) [2],[4],[10],[29] $ (21) [6],[8],[14],[28]
Interest 5.50% [2],[4],[10],[29] 5.50% [6],[8],[14],[28]
Interest 10.80% [2],[4],[10],[29] 10.90% [6],[8],[14],[28]
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Enterprise Software & Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 13,719  
Fair value at ending balance $ 17,618 [2],[4],[27] $ 13,719 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.75% [5],[6],[8]
Interest 10.90% [2],[4],[27] 11.00% [5],[6],[8]
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Enterprise Software & Services, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 2,791  
Fair value at ending balance $ 2,791 [2],[4],[27] $ 2,791 [5],[6],[8]
Interest 6.50% [2],[4],[27] 6.50% [5],[6],[8]
Interest 11.90% [2],[4],[27] 12.00% [5],[6],[8]
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 [6],[7],[8],[25] $ 2,490  
Fair value at ending balance $ 2,495 [2],[3],[4],[26] $ 2,490 [6],[7],[8],[25]
Interest 5.75% [2],[3],[4],[26] 6.00% [6],[7],[8],[25]
Interest 11.20% [2],[3],[4],[26] 11.50% [6],[7],[8],[25]
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 [5],[6],[8] $ 12,825  
Fair value at ending balance $ 12,814 [2],[4],[27] $ 12,825 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 10.90% [2],[4],[27] 10.90% [5],[6],[8]
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 444  
Fair value at ending balance $ 447 [2],[4],[10],[27] $ 444 [5],[6],[8],[14]
Interest 5.50% [2],[4],[10],[27] 5.50% [5],[6],[8],[14]
Interest 10.90% [2],[4],[10],[27] 10.90% [5],[6],[8],[14]
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 [8] $ 8,788  
Fair value at ending balance $ 9,015 [4] $ 8,788 [8]
Investment owned, balance (in shares) 7,575,758 [4],[9],[11],[12] 7,575,758 [8],[13],[15],[16]
Investment, interest rate, paid in kind 12.50% [4] 12.50% [8]
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 [6],[7],[8],[14],[28] $ 1,997  
Fair value at ending balance $ 1,992 [2],[3],[4],[29] $ 1,997 [6],[7],[8],[14],[28]
Interest 5.50% [2],[3],[4],[29] 5.50% [6],[7],[8],[14],[28]
Interest 10.90% [2],[3],[4],[29] 11.00% [6],[7],[8],[14],[28]
Investment, Identifier [Axis]: Syntax Systems Ltd, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[28] $ 620  
Fair value at ending balance $ 728 [2],[3],[4],[10],[29] $ 620 [6],[7],[8],[14],[28]
Interest 5.50% [2],[3],[4],[10],[29] 5.50% [6],[7],[8],[14],[28]
Interest 10.90% [2],[3],[4],[10],[29] 11.00% [6],[7],[8],[14],[28]
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 [8],[20] $ 73  
Fair value at ending balance $ 76 [4],[19] $ 73 [8],[20]
Investment owned, balance (in shares) 1,589 [4],[9],[11],[12],[19] 1,589 [8],[13],[15],[16],[20]
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 [8] $ 2,395  
Fair value at ending balance $ 2,558 [4] $ 2,395 [8]
Investment, interest rate, paid in kind 7.80% [4] 7.80% [8]
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 810  
Fair value at ending balance $ 1,367 [2],[4],[10],[27] $ 810 [5],[6],[8],[14]
Interest 4.75% [2],[4],[10],[27] 4.75% [5],[6],[8],[14]
Interest 10.10% [2],[4],[10],[27] 10.10% [5],[6],[8],[14]
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, First Lien Senior Secured Term Loan1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 584  
Fair value at ending balance $ 586 [2],[4],[27] $ 584 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.30% [2],[4],[27] 10.40% [5],[6],[8]
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 9  
Fair value at ending balance $ 9 [4],[19] $ 9 [8],[20]
Investment owned, balance (in shares) 4,673 [4],[9],[11],[12],[19] 4,673 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ (10)  
Fair value at ending balance $ (7) [2],[4],[10],[27] $ (10) [5],[6],[8],[14]
Interest 4.75% [2],[4],[10],[27] 4.75% [5],[6],[8],[14]
Interest 10.10% [2],[4],[10],[27] 10.10% [5],[6],[8],[14]
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[28] $ 7,915  
Fair value at ending balance $ 7,903 [2],[4],[29] $ 7,915 [6],[8],[28]
Interest 5.75% [2],[4],[29] 5.75% [6],[8],[28]
Interest 11.20% [2],[4],[29] 11.20% [6],[8],[28]
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ 2,430  
Fair value at ending balance $ 2,502 [2],[4],[10],[29] $ 2,430 [6],[8],[14],[28]
Interest 6.00% [2],[4],[10],[29] 6.00% [6],[8],[14],[28]
Interest 11.40% [2],[4],[10],[29] 11.50% [6],[8],[14],[28]
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 [6],[8],[14],[28] $ 223  
Fair value at ending balance $ 212 [2],[4],[10],[29] $ 223 [6],[8],[14],[28]
Interest 5.75% [2],[4],[10],[29] 5.75% [6],[8],[14],[28]
Interest 11.20% [2],[4],[10],[29] 11.20% [6],[8],[14],[28]
Investment, Identifier [Axis]: Tanqueray Bidco Limited, Technology. First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[35] $ 1,730  
Fair value at ending balance $ 1,714 [2],[3],[4],[10],[36] $ 1,730 [6],[7],[8],[14],[35]
Interest 5.50% [2],[3],[4],[10],[36] 5.50% [6],[7],[8],[14],[35]
Interest 10.70% [2],[3],[4],[10],[36] 10.70% [6],[7],[8],[14],[35]
Investment, Identifier [Axis]: Team Air Distributing, LLC, Consumer Cyclical, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 420  
Fair value at ending balance $ 424 [4],[19] $ 420 [8],[20]
Investment owned, balance (in shares) 400,000 [4],[9],[11],[12],[19] 400,000 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Team Air Distributing, LLC, Consumer Cyclical, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] $ 590  
Fair value at ending balance $ 591 [4] $ 590 [8]
Interest 12.00% [4] 12.00% [8]
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 [5],[6],[8],[18] $ 10,382  
Fair value at ending balance $ 10,220 [2],[4],[17],[27] $ 10,382 [5],[6],[8],[18]
Interest 7.50% [2],[4],[17],[27] 7.50% [5],[6],[8],[18]
Interest 12.90% [2],[4],[17],[27] 13.10% [5],[6],[8],[18]
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 [6],[18],[25] $ 9,646  
Fair value at ending balance $ 4,750 [2],[17],[26] $ 9,646 [6],[18],[25]
Interest 9.00% [2],[17],[26] 5.00% [6],[18],[25]
Interest 14.30% [2],[17],[26] 10.90% [6],[18],[25]
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 [6],[8],[18],[25] $ 4,694  
Fair value at ending balance [6],[8],[18],[25]   $ 4,694
Interest [6],[8],[18],[25]   9.00%
Interest [6],[8],[18],[25]   14.90%
Investment, Identifier [Axis]: Techone B.V., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[30] 3,814  
Fair value at ending balance $ 3,738 [1],[2],[3],[4] $ 3,814 [6],[7],[8],[30]
Interest 5.50% [1],[2],[3],[4] 5.50% [6],[7],[8],[30]
Interest 9.30% [1],[2],[3],[4] 9.30% [6],[7],[8],[30]
Investment, Identifier [Axis]: Techone B.V., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[30] $ 201  
Fair value at ending balance $ (8) [1],[2],[3],[4],[10] $ 201 [6],[7],[8],[14],[30]
Interest 5.50% [1],[2],[3],[4],[10] 5.50% [6],[7],[8],[14],[30]
Interest 9.30% [1],[2],[3],[4],[10] 9.30% [6],[7],[8],[14],[30]
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 [5],[6],[8] $ 6,226  
Fair value at ending balance $ 6,139 [2],[4],[27] $ 6,226 [5],[6],[8]
Interest 5.00% [2],[4],[27] 5.00% [5],[6],[8]
Interest 10.30% [2],[4],[27] 10.60% [5],[6],[8]
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 [5],[6],[8],[14] $ (6)  
Fair value at ending balance $ (17) [2],[4],[10],[27] $ (6) [5],[6],[8],[14]
Interest 5.00% [2],[4],[10],[27] 5.00% [5],[6],[8],[14]
Interest 10.30% [2],[4],[10],[27] 10.60% [5],[6],[8],[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 [8],[20] $ 115  
Fair value at ending balance $ 104 [4],[19] $ 115 [8],[20]
Investment owned, balance (in shares) 24,358.97 [4],[9],[11],[12],[19] 24,358.97 [8],[13],[15],[16],[20]
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 [8] $ 260  
Fair value at ending balance $ 261 [4] $ 260 [8]
Interest 10.00% [4] 10.00% [8]
Investment, interest rate, paid in kind 4.00% [4] 4.00% [8]
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 [5],[6],[8],[14] $ 830  
Fair value at ending balance $ 2,653 [2],[4],[10],[27] $ 830 [5],[6],[8],[14]
Interest 4.25% [2],[4],[10],[27] 4.25% [5],[6],[8],[14]
Interest 9.70% [2],[4],[10],[27] 9.60% [5],[6],[8],[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 [5],[6],[8],[14] $ 0  
Fair value at ending balance $ 0 [2],[4],[10],[27] $ 0 [5],[6],[8],[14]
Interest 4.25% [2],[4],[10],[27] 4.25% [5],[6],[8],[14]
Interest 9.70% [2],[4],[10],[27] 9.60% [5],[6],[8],[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 [6],[8],[25] $ 3,578  
Fair value at ending balance $ 3,584 [2],[4],[26] $ 3,578 [6],[8],[25]
Interest 7.75% [2],[4],[26] 7.75% [6],[8],[25]
Interest 13.20% [2],[4],[26] 13.20% [6],[8],[25]
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Capital Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[28] $ 12,680  
Fair value at ending balance $ 12,680 [2],[4],[29] $ 12,680 [6],[8],[28]
Interest 5.50% [2],[4],[29] 5.75% [6],[8],[28]
Interest 10.80% [2],[4],[29] 11.10% [6],[8],[28]
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Capital Equipment, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ 0  
Fair value at ending balance $ 0 [2],[4],[10],[29] $ 0 [6],[8],[14],[28]
Interest 5.50% [2],[4],[10],[29] 5.75% [6],[8],[14],[28]
Interest 10.80% [2],[4],[10],[29] 11.10% [6],[8],[14],[28]
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Capital Equipment, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] $ 4,882  
Fair value at ending balance $ 5,063 [4] $ 4,882 [8]
Investment, interest rate, paid in kind 12.50% [4] 12.50% [8]
Investment, Identifier [Axis]: The Hilb Group, LLC, Insurance Brokerage, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ 11,317  
Fair value at ending balance $ 11,401 [2],[4],[10],[29] $ 11,317 [6],[8],[14],[28]
Interest 5.75% [2],[4],[10],[29] 5.75% [6],[8],[14],[28]
Interest 11.20% [2],[4],[10],[29] 11.20% [6],[8],[14],[28]
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 [8],[20] $ 2,152  
Fair value at ending balance $ 2,152 [4],[19] $ 2,152 [8],[20]
Investment owned, balance (in shares) 676,880.98 [4],[9],[11],[12],[19] 676,880.98 [8],[13],[15],[16],[20]
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 [5],[6],[8] $ 4,240  
Fair value at ending balance $ 4,276 [2],[4],[27] $ 4,240 [5],[6],[8]
Interest 7.50% [2],[4],[27] 7.50% [5],[6],[8]
Interest 12.80% [2],[4],[27] 12.80% [5],[6],[8]
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [20] $ 13,365  
Fair value at ending balance 10,980 [19] $ 13,365 [20]
Investment, Identifier [Axis]: Thompson Rivers LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 13,365 30,339
Gross Additions [22] 0 0
Gross Reductions [23] (2,396) (17,733)
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 11 759
Fair value at ending balance 10,980 13,365
Amount of Interest or Dividends Credited to Income [24] 0 0
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 [6],[28] 5,433  
Fair value at ending balance [6],[28]   $ 5,433
Interest [6],[28]   6.00%
Interest [6],[28]   11.50%
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 [6],[8],[28] 3,717  
Fair value at ending balance [6],[8],[28]   $ 3,717
Interest [6],[8],[28]   6.00%
Interest [6],[8],[28]   11.50%
Investment, interest rate, paid in kind [6],[8],[28]   5.00%
Investment, Identifier [Axis]: Trader Corporation, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[65] 4,617  
Fair value at ending balance $ 4,561 [2],[3],[4],[66] $ 4,617 [6],[7],[8],[65]
Interest 6.50% [2],[3],[4],[66] 6.75% [6],[7],[8],[65]
Interest 12.20% [2],[3],[4],[66] 12.20% [6],[7],[8],[65]
Investment, Identifier [Axis]: Trader Corporation, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[65] $ (6)  
Fair value at ending balance $ 0 [2],[3],[4],[10],[66] $ (6) [6],[7],[8],[14],[65]
Interest 6.50% [2],[3],[4],[10],[66] 6.75% [6],[7],[8],[14],[65]
Interest 12.20% [2],[3],[4],[10],[66] 12.20% [6],[7],[8],[14],[65]
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 [5],[6],[8] $ 6,035  
Fair value at ending balance $ 9,134 [2],[4],[27] $ 6,035 [5],[6],[8]
Interest 5.00% [2],[4],[27] 4.75% [5],[6],[8]
Interest 10.30% [2],[4],[27] 10.30% [5],[6],[8]
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 [6],[8],[25] $ 10,335  
Fair value at ending balance $ 9,233 [2],[4],[26] $ 10,335 [6],[8],[25]
Interest 4.50% [2],[4],[26] 4.50% [6],[8],[25]
Interest 9.90% [2],[4],[26] 10.00% [6],[8],[25]
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 [5],[6],[8] $ 15,409  
Fair value at ending balance $ 15,193 [2],[4],[27] $ 15,409 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 11.00% [2],[4],[27] 10.90% [5],[6],[8]
Investment, Identifier [Axis]: Trintech, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[28] $ 6,790  
Fair value at ending balance $ 6,786 [2],[4],[29] $ 6,790 [6],[8],[28]
Interest 6.50% [2],[4],[29] 6.50% [6],[8],[28]
Interest 11.80% [2],[4],[29] 11.90% [6],[8],[28]
Investment, Identifier [Axis]: Trintech, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ 140  
Fair value at ending balance $ 141 [2],[4],[10],[29] $ 140 [6],[8],[14],[28]
Interest 6.50% [2],[4],[10],[29] 6.50% [6],[8],[14],[28]
Interest 11.80% [2],[4],[10],[29] 11.90% [6],[8],[14],[28]
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 [5],[6],[8] $ 18,967  
Fair value at ending balance [5],[6],[8]   $ 18,967
Interest [5],[6],[8]   6.25%
Interest [5],[6],[8]   11.70%
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 [8],[18],[20] 0  
Fair value at ending balance $ 0 [4],[17],[19] $ 0 [8],[18],[20]
Investment owned, balance (in shares) 2.71 [4],[9],[11],[12],[17],[19] 2.71 [8],[13],[15],[16],[18],[20]
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 [8],[18],[20] $ 0  
Fair value at ending balance $ 0 [4],[17],[19] $ 0 [8],[18],[20]
Investment owned, balance (in shares) 2.8 [4],[9],[11],[12],[17],[19] 2.8 [8],[13],[15],[16],[18],[20]
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 [8] $ 1,323  
Fair value at ending balance $ 1,141 [4] $ 1,323 [8]
Investment owned, balance (in shares) 440.97 [4],[9],[11],[12] 440.97 [8],[13],[15],[16]
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 [5],[6],[8] $ 6,739  
Fair value at ending balance $ 15,996 [2],[4],[27] $ 6,739 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.25% [5],[6],[8]
Interest 10.80% [2],[4],[27] 10.60% [5],[6],[8]
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 [5],[6],[8],[14] $ 7,939  
Fair value at ending balance $ 7,929 [2],[4],[10],[27] $ 7,939 [5],[6],[8],[14]
Interest 6.00% [2],[4],[10],[27] 6.00% [5],[6],[8],[14]
Interest 11.30% [2],[4],[10],[27] 11.50% [5],[6],[8],[14]
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 [5],[6],[8] $ 4,898  
Fair value at ending balance $ 4,912 [2],[4],[27] $ 4,898 [5],[6],[8]
Interest 5.75% [2],[4],[27] 6.00% [5],[6],[8]
Interest 11.10% [2],[4],[27] 11.40% [5],[6],[8]
Investment, Identifier [Axis]: UBC Ledgers Holding AB, Financial Other, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[44] $ 1,529  
Fair value at ending balance $ 1,447 [2],[3],[4],[10],[45] $ 1,529 [6],[7],[8],[14],[44]
Interest 5.25% [2],[3],[4],[10],[45] 5.25% [6],[7],[8],[14],[44]
Interest 9.30% [2],[3],[4],[10],[45] 9.30% [6],[7],[8],[14],[44]
Investment, Identifier [Axis]: UBC Ledgers Holding AB, Financial Other, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[44] $ 0  
Fair value at ending balance $ 0 [2],[3],[4],[10],[45] $ 0 [6],[7],[8],[14],[44]
Interest 5.25% [2],[3],[4],[10],[45] 5.25% [6],[7],[8],[14],[44]
Interest 9.30% [2],[3],[4],[10],[45] 9.30% [6],[7],[8],[14],[44]
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 [6],[7],[8],[35] $ 10,762  
Fair value at ending balance $ 10,818 [2],[3],[4],[36] $ 10,762 [6],[7],[8],[35]
Interest 7.25% [2],[3],[4],[36] 4.50% [6],[7],[8],[35]
Interest 12.40% [2],[3],[4],[36] 4.50% [6],[7],[8],[35]
Investment, interest rate, paid in kind [6],[7],[8],[35]   3.40%
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 [6],[8],[14],[28] $ 9,883  
Fair value at ending balance $ 9,971 [2],[4],[10],[29] $ 9,883 [6],[8],[14],[28]
Interest 5.75% [2],[4],[10],[29] 5.75% [6],[8],[14],[28]
Interest 11.20% [2],[4],[10],[29] 11.10% [6],[8],[14],[28]
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 [6],[7],[8],[14],[35] $ 877  
Fair value at ending balance $ 888 [2],[3],[4],[10],[36] $ 877 [6],[7],[8],[14],[35]
Interest 5.94% [2],[3],[4],[10],[36] 6.00% [6],[7],[8],[14],[35]
Interest 11.40% [2],[3],[4],[10],[36] 11.40% [6],[7],[8],[14],[35]
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 [6],[7],[8],[14],[37] $ 1,312  
Fair value at ending balance $ 1,305 [2],[3],[4],[10],[38] $ 1,312 [6],[7],[8],[14],[37]
Interest 5.75% [2],[3],[4],[10],[38] 5.75% [6],[7],[8],[14],[37]
Interest 9.90% [2],[3],[4],[10],[38] 9.90% [6],[7],[8],[14],[37]
Investment, Identifier [Axis]: Unither (Uniholding), Pharma-ceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[14],[30] $ 2,037  
Fair value at ending balance $ 2,017 [1],[2],[3],[4],[10] $ 2,037 [6],[7],[8],[14],[30]
Interest 6.25% [1],[2],[3],[4],[10] 6.25% [6],[7],[8],[14],[30]
Interest 10.20% [1],[2],[3],[4],[10] 10.20% [6],[7],[8],[14],[30]
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[30] $ 1,559  
Fair value at ending balance $ 1,551 [1],[2],[3],[4] $ 1,559 [6],[7],[8],[30]
Interest 4.75% [1],[2],[3],[4] 6.65% [6],[7],[8],[30]
Interest 8.40% [1],[2],[3],[4] 10.10% [6],[7],[8],[30]
Investment, interest rate, paid in kind 1.80% [1],[2],[3],[4] 1.80% [6],[7],[8],[30]
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 [5],[6],[7],[8] $ 3,353  
Fair value at ending balance $ 3,369 [2],[3],[4],[27] $ 3,353 [5],[6],[7],[8]
Interest 4.75% [2],[3],[4],[27] 6.65% [5],[6],[7],[8]
Interest 10.10% [2],[3],[4],[27] 12.00% [5],[6],[7],[8]
Investment, interest rate, paid in kind 1.80% [2],[3],[4],[27] 1.80% [5],[6],[7],[8]
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 [7],[18],[20] $ 91  
Fair value at ending balance 18 [3],[17],[19] $ 91 [7],[18],[20]
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 [7],[18],[20] 943  
Fair value at ending balance 1,252 [3],[17],[19] 943 [7],[18],[20]
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 [6],[8],[28] 4,783  
Fair value at ending balance $ 4,783 [2],[4],[29] $ 4,783 [6],[8],[28]
Interest 5.25% [2],[4],[29] 5.25% [6],[8],[28]
Interest 10.70% [2],[4],[29] 10.70% [6],[8],[28]
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 [8],[18],[20] $ 2  
Fair value at ending balance $ 3 [4],[17],[19] $ 2 [8],[18],[20]
Investment owned, balance (in shares) 5,591 [4],[9],[11],[12],[17],[19] 4,676 [8],[13],[15],[16],[18],[20]
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 [8],[18],[20] $ 3  
Fair value at ending balance $ 2 [4],[17],[19] $ 3 [8],[18],[20]
Investment owned, balance (in shares) 4,676 [4],[9],[11],[12],[17],[19] 5,591 [8],[13],[15],[16],[18],[20]
Investment, Identifier [Axis]: Victoria Bidco Limited, Industrial Machinery, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[8],[35] $ 3,573  
Fair value at ending balance $ 3,517 [2],[3],[4],[36] $ 3,573 [6],[7],[8],[35]
Interest 6.50% [2],[3],[4],[36] 6.50% [6],[7],[8],[35]
Interest 11.70% [2],[3],[4],[36] 11.40% [6],[7],[8],[35]
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 [5],[6],[18] $ 5,908  
Fair value at ending balance $ 6,024 [2],[17],[27] $ 5,908 [5],[6],[18]
Interest 7.25% [2],[17],[27] 7.25% [5],[6],[18]
Interest 12.70% [2],[17],[27] 12.90% [5],[6],[18]
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 [8] $ 3,262  
Fair value at ending balance $ 3,505 [4] $ 3,262 [8]
Interest 6.30% [4] 6.30% [8]
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 [5],[6],[8] $ 7,526  
Fair value at ending balance $ 7,448 [2],[4],[27] $ 7,526 [5],[6],[8]
Interest 5.50% [2],[4],[27] 5.50% [5],[6],[8]
Interest 10.90% [2],[4],[27] 10.90% [5],[6],[8]
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 [8],[20] $ 434  
Fair value at ending balance $ 279 [4],[19] $ 434 [8],[20]
Investment owned, balance (in shares) 16,442.9 [4],[9],[11],[12],[19] 16,442.9 [8],[13],[15],[16],[20]
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 [5],[8] $ 5,785  
Fair value at ending balance $ 5,770 [4],[27] $ 5,785 [5],[8]
Interest 4.75% [4],[27] 5.25% [5],[8]
Interest 10.10% [4],[27] 10.60% [5],[8]
Investment, Identifier [Axis]: W2O Holdings, Inc., Healthcare Technology, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 2,699  
Interest [2],[4],[27] 5.25%  
Interest [2],[4],[27] 10.60%  
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC,Insurance, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 2,403  
Fair value at ending balance $ 2,488 [2],[4],[10],[27] $ 2,403 [5],[6],[8],[14]
Interest 6.25% [2],[4],[10],[27] 6.25% [5],[6],[8],[14]
Interest 11.70% [2],[4],[10],[27] 11.70% [5],[6],[8],[14]
Investment, Identifier [Axis]: WWEC Holdings III Corp, Capital Goods, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8] $ 12,346  
Fair value at ending balance $ 2,142 [2],[4],[27] $ 12,346 [5],[6],[8]
Interest 5.75% [2],[4],[27] 5.75% [5],[6],[8]
Interest 11.10% [2],[4],[27] 11.10% [5],[6],[8]
Investment, Identifier [Axis]: WWEC Holdings III Corp, Capital Goods, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[4],[27] $ 9,862  
Interest [2],[4],[27] 5.75%  
Interest [2],[4],[27] 11.10%  
Investment, Identifier [Axis]: WWEC Holdings III Corp, Capital Goods, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 466  
Fair value at ending balance $ (62) [2],[4],[10],[27] $ 466 [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 11.10% [2],[4],[10],[27] 11.10% [5],[6],[8],[14]
Investment, Identifier [Axis]: Waccamaw River LLC, Investment Funds & Vehicles, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[20] $ 15,470  
Fair value at ending balance 15,779 [3],[19] $ 15,470 [7],[20]
Investment, Identifier [Axis]: Waccamaw River LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 15,470 20,212
Gross Additions [22] 0 2,480
Gross Reductions [23] 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 309 (7,222)
Fair value at ending balance 15,779 15,470
Amount of Interest or Dividends Credited to Income [24] 0 1,460
Investment, Identifier [Axis]: Watermill-QMC Midco, Inc., Automotive, Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[18],[20] 0  
Fair value at ending balance 0 [4],[17],[19] 0 [8],[18],[20]
Investment, Identifier [Axis]: Wheels Up Experience Inc, Transportation Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8] 9,884  
Fair value at ending balance $ 8,884 [4] $ 9,884 [8]
Interest 12.00% [4] 12.00% [8]
Investment, Identifier [Axis]: Whitcraft Holdings, 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 [5],[6],[8] $ 8,345  
Fair value at ending balance $ 8,595 [2],[4],[27] $ 8,345 [5],[6],[8]
Interest 7.00% [2],[4],[27] 7.00% [5],[6],[8]
Interest 12.30% [2],[4],[27] 12.30% [5],[6],[8]
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [8],[20] $ 804  
Fair value at ending balance $ 818 [4],[19] $ 804 [8],[20]
Investment owned, balance (in shares) 63,087.1 [4],[9],[11],[12],[19] 63,087.1 [8],[13],[15],[16],[20]
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Aerospace & Defense, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[6],[8],[14] $ 67  
Fair value at ending balance $ 902 [2],[4],[10],[27] $ 67 [5],[6],[8],[14]
Interest 7.00% [2],[4],[10],[27] 7.00% [5],[6],[8],[14]
Interest 12.30% [2],[4],[10],[27] 12.30% [5],[6],[8],[14]
Investment, Identifier [Axis]: White 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 [5],[6],[7],[8],[14] $ 1,687  
Fair value at ending balance $ 1,696 [2],[3],[4],[10],[27] $ 1,687 [5],[6],[7],[8],[14]
Interest 6.00% [2],[3],[4],[10],[27] 6.00% [5],[6],[7],[8],[14]
Interest 11.30% [2],[3],[4],[10],[27] 11.40% [5],[6],[7],[8],[14]
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 [5],[6],[18] $ 47  
Fair value at ending balance $ 47 [2],[17],[27] $ 47 [5],[6],[18]
Interest 6.25% [2],[17],[27] 6.25% [5],[6],[18]
Interest 11.70% [2],[17],[27] 11.80% [5],[6],[18]
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 [8],[20] $ 1,012  
Fair value at ending balance $ 1,060 [4],[19] $ 1,012 [8],[20]
Investment owned, balance (in shares) 1,663.3 [4],[9],[11],[12],[19] 1,663.3 [8],[13],[15],[16],[20]
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 [5],[6],[8] $ 4,946  
Fair value at ending balance $ 5,059 [2],[4],[27] $ 4,946 [5],[6],[8]
Interest 5.75% [2],[4],[27] 5.75% [5],[6],[8]
Interest 11.10% [2],[4],[27] 11.40% [5],[6],[8]
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 [5],[6],[8],[14] $ 1,378  
Fair value at ending balance $ 1,769 [2],[4],[10],[27] $ 1,378 [5],[6],[8],[14]
Interest 5.75% [2],[4],[10],[27] 5.75% [5],[6],[8],[14]
Interest 11.10% [2],[4],[10],[27] 11.40% [5],[6],[8],[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 [5],[6],[8] $ 2,414  
Fair value at ending balance $ 18,646 [2],[4],[27] $ 2,414 [5],[6],[8]
Interest 5.75% [2],[4],[27] 4.50% [5],[6],[8]
Interest 11.10% [2],[4],[27] 10.10% [5],[6],[8]
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 [5],[6],[8] $ 8,760  
Fair value at ending balance $ (19) [2],[4],[27] $ 8,760 [5],[6],[8]
Interest 5.75% [2],[4],[27] 4.50% [5],[6],[8]
Interest 11.10% [2],[4],[27] 10.10% [5],[6],[8]
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 [7],[8],[20] $ 582  
Fair value at ending balance $ 577 [3],[4],[19] $ 582 [7],[8],[20]
Investment owned, balance (in shares) 45,665,825 [3],[4],[9],[11],[12],[19] 45,665,825 [7],[8],[13],[15],[16],[20]
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 [6],[7],[8],[14],[35] $ 6,448  
Fair value at ending balance $ 299 [2],[3],[4],[36] $ 6,448 [6],[7],[8],[14],[35]
Interest 5.25% [2],[3],[4],[36] 5.25% [6],[7],[8],[14],[35]
Interest 9.20% [2],[3],[4],[36] 10.40% [6],[7],[8],[14],[35]
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[3],[4],[10],[36] $ 6,690  
Interest [2],[3],[4],[10],[36] 5.25%  
Interest [2],[3],[4],[10],[36] 10.40%  
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 [7],[8] $ 3,241  
Fair value at ending balance $ 3,480 [3],[4] $ 3,241 [7],[8]
Investment, interest rate, paid in kind 11.00% [3],[4] 11.00% [7],[8]
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 [5],[6],[8],[14] $ 6,271  
Fair value at ending balance $ 8,308 [2],[4],[10],[27] $ 6,271 [5],[6],[8],[14]
Interest 6.00% [2],[4],[10],[27] 6.00% [5],[6],[8],[14]
Interest 11.30% [2],[4],[10],[27] 11.50% [5],[6],[8],[14]
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 [8] $ 172  
Fair value at ending balance $ 212 [4] $ 172 [8]
Investment owned, balance (in shares) 152.69 [4],[9],[11],[12] 152.69 [8],[13],[15],[16]
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 [5],[6],[8],[14] $ (6)  
Fair value at ending balance $ 287 [2],[4],[10],[27] $ (6) [5],[6],[8],[14]
Interest 6.00% [2],[4],[10],[27] 6.00% [5],[6],[8],[14]
Interest 11.30% [2],[4],[10],[27] 11.50% [5],[6],[8],[14]
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 [6],[7],[8],[14],[35] $ 5,718  
Fair value at ending balance $ 5,556 [2],[3],[4],[10],[36] $ 5,718 [6],[7],[8],[14],[35]
Interest 6.25% [2],[3],[4],[10],[36] 6.00% [6],[7],[8],[14],[35]
Interest 11.40% [2],[3],[4],[10],[36] 11.40% [6],[7],[8],[14],[35]
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 [6],[8],[28] $ 3,473  
Fair value at ending balance $ 3,471 [2],[4],[29] $ 3,473 [6],[8],[28]
Interest 5.00% [2],[4],[29] 5.00% [6],[8],[28]
Interest 10.40% [2],[4],[29] 10.50% [6],[8],[28]
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[8],[14],[28] $ 0  
Fair value at ending balance $ 271 [2],[4],[10],[29] $ 0 [6],[8],[14],[28]
Interest 5.00% [2],[4],[10],[29] 5.00% [6],[8],[14],[28]
Interest 10.40% [2],[4],[10],[29] 10.50% [6],[8],[14],[28]
Celebration Bidco, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 18,391  
Fair value at ending balance 20,683 $ 18,391
Coastal Marina Holdings, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 34,677  
Fair value at ending balance 38,615 34,677
Eclipse Business Capital, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 155,889  
Fair value at ending balance 153,570 155,889
Hylan Datacom And Electrical, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 10,449  
Fair value at ending balance 9,589 10,449
Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 41,053  
Fair value at ending balance 41,424 41,053
Rocade Holdings LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 73,957  
Fair value at ending balance 76,445 73,957
Sierra Senior Loan Strategy JV I, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 39,172  
Fair value at ending balance 42,000 39,172
Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 13,365  
Fair value at ending balance 10,980 13,365
Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 15,470  
Fair value at ending balance 15,779 15,470
Black Angus Steakhouses, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 12,035  
Fair value at ending balance 9,807 12,035
MVC Automotive Group GmbH    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 25,192  
Fair value at ending balance 33,325 25,192
MVC Private Equity Fund LP    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 1,005  
Fair value at ending balance 511 1,005
Security Holdings B.V.    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 52,688  
Fair value at ending balance 59,473 52,688
Affiliate investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 402,423 289,993
Gross Additions [22] 17,354 165,576
Gross Reductions [23] (13,487) (60,342)
Amount of Realized Gain (Loss) 0 (64)
Amount of Unrealized Gain (Loss) 2,795 7,260
Fair value at ending balance 409,085 402,423
Amount of Interest or Dividends Credited to Income [24] 8,432 36,382
Affiliate investments | 1888 Industrial Services, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 0 1,263
Gross Additions [21],[22]   55
Gross Reductions [21],[23]   (1,197)
Amount of Realized Gain (Loss) [21]   (775)
Amount of Unrealized Gain (Loss) [21]   654
Fair value at ending balance [21]   0
Amount of Interest or Dividends Credited to Income [21],[24]   194
Affiliate investments | Celebration Bidco, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 18,391 0
Gross Additions [21],[22] 0 18,391
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 2,292 0
Fair value at ending balance [21] 20,683 18,391
Amount of Interest or Dividends Credited to Income [21],[24] 217 0
Affiliate investments | Coastal Marina Holdings, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 34,677 0
Gross Additions [21],[22] 3,732 35,243
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 206 (566)
Fair value at ending balance [21] 38,615 34,677
Amount of Interest or Dividends Credited to Income [21],[24] 544 1,086
Affiliate investments | Eclipse Business Capital, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 155,889 144,884
Gross Additions [21],[22] 11,461 35,561
Gross Reductions [21],[23] (11,091) (35,530)
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] (2,689) 10,974
Fair value at ending balance [21] 153,570 155,889
Amount of Interest or Dividends Credited to Income [21],[24] 3,412 15,253
Affiliate investments | Hylan Datacom And Electrical, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 10,449 12,511
Gross Additions [21],[22] 99 496
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] (959) (2,558)
Fair value at ending balance [21] 9,589 10,449
Amount of Interest or Dividends Credited to Income [21],[24] 324 1,257
Affiliate investments | Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 41,053 40,088
Gross Additions [22] 0 0 [21]
Gross Reductions [23] 0 0 [21]
Amount of Realized Gain (Loss) 0 0 [21]
Amount of Unrealized Gain (Loss) 371 965 [21]
Fair value at ending balance 41,424 41,053 [21]
Amount of Interest or Dividends Credited to Income [24] 1,427 5,709 [21]
Affiliate investments | Kemmerer Operations LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 0 2,746
Gross Additions [21],[22]   237
Gross Reductions [21],[23]   (4,102)
Amount of Realized Gain (Loss) [21]   711
Amount of Unrealized Gain (Loss) [21]   408
Fair value at ending balance [21]   0
Amount of Interest or Dividends Credited to Income [21],[24]   156
Affiliate investments | Rocade Holdings LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [21] 73,957 0
Gross Additions [21],[22] 2,062 73,113
Gross Reductions [21],[23] 0 0
Amount of Realized Gain (Loss) [21] 0 0
Amount of Unrealized Gain (Loss) [21] 426 844
Fair value at ending balance [21] 76,445 73,957
Amount of Interest or Dividends Credited to Income [21],[24] 2,063 5,612
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 39,172 37,950
Gross Additions [22] 0 0
Gross Reductions [23] 0 (1,780)
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 2,828 3,002
Fair value at ending balance 42,000 39,172
Amount of Interest or Dividends Credited to Income [24] 445 5,655
Affiliate investments | Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 13,365 30,339
Gross Additions [22] 0 0
Gross Reductions [23] (2,396) (17,733)
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 11 759
Fair value at ending balance 10,980 13,365
Amount of Interest or Dividends Credited to Income [24] 0 0
Affiliate investments | Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 15,470 20,212
Gross Additions [22] 0 2,480
Gross Reductions [23] 0 0
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 309 (7,222)
Fair value at ending balance 15,779 15,470
Amount of Interest or Dividends Credited to Income [24] 0 1,460
Control investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 90,920 106,328
Gross Additions [47] 391 8,578
Gross Reductions [48] 0 (986)
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 11,805 (23,000)
Fair value at ending balance 103,116 90,920
Amount of Interest or Dividends Credited to Income [49] 795 3,313
Control investments | Black Angus Steakhouses, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [46] 12,035 14,794
Gross Additions [46],[47] 141 1,330
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] (2,369) (4,089)
Fair value at ending balance [46] 9,807 12,035
Amount of Interest or Dividends Credited to Income [46],[49] 266 1,401
Control investments | MVC Automotive Group GmbH    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [46] 25,192 16,824
Gross Additions [46],[47] 0 2,613
Gross Reductions [46],[48] 0 0
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] 8,133 5,755
Fair value at ending balance [46] 33,325 25,192
Amount of Interest or Dividends Credited to Income [46],[49] 148 587
Control investments | MVC Private Equity Fund LP    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 1,005 1,838
Gross Additions [47] 0 0
Gross Reductions [48] 0 (964)
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (494) 131
Fair value at ending balance 511 1,005
Amount of Interest or Dividends Credited to Income [49] 15 95
Control investments | Security Holdings B.V.    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [46] 52,688 72,872
Gross Additions [46],[47] 250 4,635
Gross Reductions [46],[48] 0 (22)
Amount of Realized Gain (Loss) [46] 0 0
Amount of Unrealized Gain (Loss) [46] 6,535 (24,797)
Fair value at ending balance [46] 59,473 52,688
Amount of Interest or Dividends Credited to Income [46],[49] $ 366 $ 1,230
[1] The interest rate on these loans is subject to 3 Month EURIBOR, which as of March 31, 2024 was 3.89200%.
[2] Debt investment includes interest rate floor feature.
[3] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 29.1% of total investments at fair value as of March 31, 2024. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. If at any time qualifying assets do not represent at least 70% of the Company’s total assets, the Company will be precluded from acquiring any additional non-qualifying asset until such time as it complies with the requirements of Section 55(a).
[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 SOFR, which as of December 31, 2023 was 5.33140%.
[6] Debt investment includes interest rate floor feature.
[7] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 28.8% of total investments at fair value as of December 31, 2023. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. If at any time qualifying assets do not represent at least 70% of the Company’s total assets, the Company will be precluded from acquiring any additional non-qualifying asset until such time as it complies with the requirements of Section 55(a).
[8] The fair value of the investment was determined using significant unobservable inputs.
[9] A summary of the composition of the Company’s investment portfolio at cost and fair value, and as a percentage of total investments and net assets are as follows:
($ in thousands)CostPercent of
Total
Portfolio
Fair ValuePercent of
Total
Portfolio
Percent of
Total
Net Assets
March 31, 2024:
Senior debt and 1st lien notes
$1,699,117 67 %$1,658,742 66 %137 %
Subordinated debt and 2nd lien notes
260,225 10 246,902 10 21 
Structured products105,043 95,131 
Equity shares343,533 13 413,482 16 34 
Equity warrants129 — 2,586 — — 
Investments in joint ventures / PE fund143,252 110,694 
$2,551,299 100 %$2,527,537 100 %209 %
[10] Position or portion thereof is an unfunded loan or equity commitment.
[11] All debt investments are income producing, unless otherwise noted. The Company’s external investment adviser, Barings, determines in good faith the fair value of the Company’s investments in accordance with a valuation policy and processes established by the Adviser, which have been approved by the Company’s board of directors (the “Board”), and the Investment Company Act of 1940, as amended (the “1940 Act”). In addition, all debt investments are variable rate investments unless otherwise noted. Index-based floating interest rates are generally subject to a contractual minimum interest rate. Variable rate loans to the Company’s portfolio companies bear interest at a rate that may be determined by reference to the Secured Overnight Financing Rate (“SOFR”), the Euro Interbank Offered Rate (“EURIBOR”), the Bank Bill Swap Bid Rate (“BBSY”), the Stockholm Interbank Offered Rate (“STIBOR”), the Canadian Dollar Offered Rate (“CDOR”), the Sterling Overnight Index Average (“SONIA”), the Swiss Average Rate Overnight (“SARON”), the Norwegian Interbank Offered Rate (“NIBOR”), the Bank Bill Market rate (“BKBM”) or an alternate base rate (commonly based on the Federal Funds Rate or the Prime Rate), at the borrower’s option, which reset annually, semi-annually, quarterly or monthly. For each such loan, the Company has provided the interest rate in effect on the date presented. SOFR-based contracts may include a credit spread adjustment that is charged in addition to the base rate and the stated spread. The borrower may also elect to have multiple interest reset periods for each loan.
[12] All of the Company’s portfolio company investments (including joint venture investments), which as of March 31, 2024 represented 208.6% 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.
[13] A summary of the composition of the Company’s investment portfolio at cost and fair value, and as a percentage of total investments and net assets are as follows:
($ in thousands)CostPercent of
Total
Portfolio
Fair ValuePercent of
Total
Portfolio
Percent of
Total
Net Assets
December 31, 2023:
Senior debt and 1st lien notes
$1,705,353 67 %$1,670,300 67 %140 %
Subordinated debt and 2nd lien notes
256,850 10 238,215 10 20 
Structured products107,314 93,038 
Equity shares320,335 13 374,704 15 31 
Equity warrants76 — 2,392 — — 
Investments in joint ventures / PE fund145,648 110,066 
$2,535,576 100 %$2,488,715 100 %208 %
[14] Position or portion thereof is an unfunded loan or equity commitment.
[15] All debt investments are income producing, unless otherwise noted. The Adviser determines in good faith the fair value of the Company’s investments in accordance with a valuation policy and processes established by the Adviser, which have been approved by the Board, and the 1940 Act. In addition, all debt investments are variable rate investments unless otherwise noted. Index-based floating interest rates are generally subject to a contractual minimum interest rate. Variable rate loans to the Company’s portfolio companies bear interest at a rate that may be determined by reference to SOFR, EURIBOR, BBSY, STIBOR, CDOR, SONIA, SARON, NIBOR, BKBM or an alternate base rate (commonly based on the Federal Funds Rate or the Prime Rate), at the borrower’s option, which reset annually, semi-annually, quarterly or monthly. For each such loan, the Company has provided the interest rate in effect on the date presented. SOFR-based contracts may include a credit spread adjustment that is charged in addition to the base rate and the stated spread. The borrower may also elect to have multiple interest reset periods for each loan.
[16] All of the Company’s portfolio company investments (including joint venture investments), which as of December 31, 2023 represented 208.0% 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.
[17] Investment was purchased as part of the Sierra Merger and is part of the Sierra Reference Portfolio for purposes of the Sierra Credit Support Agreement.
[18] Investment was purchased as part of the Sierra Merger and is part of the Sierra Reference Portfolio for purposes of the Sierra Credit Support Agreement.
[19] Investment is non-income producing.
[20] Investment is non-income producing.
[21]
(d) The fair value of the investment was determined using significant unobservable inputs.
[22]
(a)     Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
[23]
(b)    Gross reductions include decreases in the cost basis of investments resulting from principal repayments, sales and return of capital.
[24] (c) Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Affiliate category.
[25] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2023 was 5.15772%.
[26] The interest rate on these loans is subject to 6 Month SOFR, which as of March 31, 2024 was 5.21781%.
[27] The interest rate on these loans is subject to 3 Month SOFR, which as of March 31, 2024 was 5.29823%.
[28] The interest rate on these loans is subject to 1 Month SOFR, which as of December 31, 2023 was 5.35472%.
[29] The interest rate on these loans is subject to 1 Month SOFR, which as of March 31, 2024 was 5.32874%.
[30] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2023 was 3.90900%.
[31] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2023 was 4.31000%.
[32] The interest rate on these loans is subject to 1 Month BBSY, which as of March 31, 2024 was 4.29730%.
[33] Non-accrual investment.
[34] Non-accrual investment.
[35] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2023 was 5.20530%.
[36] The interest rate on these loans is subject to 3 Month SONIA, which as of March 31, 2024 was 5.18440%.
[37] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2023 was 3.86100%.
[38] The interest rate on these loans is subject to 6 Month EURIBOR, which as of March 31, 2024 was 3.85100%.
[39] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2023 was 5.13220%.
[40] The interest rate on these loans is subject to 6 Month SONIA, which as of March 31, 2024 was 5.09150%.
[41] The interest rate on these loans is subject to 6 Month BBSY, which as of December 31, 2023 was 4.44500%.
[42] The interest rate on these loans is subject to 6 Month BBSY, which as of March 31, 2024 was 4.49860%.
[43] The interest rate on these loans is subject to 1 Month EURIBOR, which as of March 31, 2024 was 3.85500%.
[44] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2023 was 4.05200%.
[45] The interest rate on these loans is subject to 3 Month STIBOR, which as of March 31, 2024 was 4.02500%.
[46]
(d) The fair value of the investment was determined using significant unobservable inputs.
[47]
(a) Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
[48]
(b)     Gross reductions include decreases in the cost basis of investments resulting from principal repayments, sales and return of capital.
[49]
(c)    Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Control category.
[50] The interest rate on these loans is subject to 1 Month SONIA, which as of December 31, 2023 was 5.19920%.
[51] The interest rate on these loans is subject to 1 Month SONIA, which as of March 31, 2024 was 5.19800%.
[52] The interest rate on these loans is subject to 3 Month CDOR, which as of December 31, 2023 was 5.44750%.
[53] The interest rate on these loans is subject to 3 Month CDOR, which as of March 31, 2024 was 5.29500%.
[54] The interest rate on these loans is subject to 1 Month EURIBOR, which as of December 31, 2023 was 3.84500%.
[55] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2023 was 4.35750%.
[56] The interest rate on these loans is subject to 3 Month BBSY, which as of March 31, 2024 was 4.34420%.
[57] The interest rate on these loans is subject to 3 Month BKBM, which as of December 31, 2023 was 5.63000%.
[58] The interest rate on these loans is subject to 3 Month BKBM, which as of March 31, 2024 was 5.64000%.
[59] The interest rate on these loans is subject to 6 Month SARON, which as of December 31, 2023 was 1.69524%.
[60] The interest rate on these loans is subject to 6 Month SARON, which as of March 31, 2024 was 1.46421%.
[61] 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.
[62] 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.
[63] The interest rate on these loans is subject to 1 Month NIBOR, which as of December 31, 2023 was 4.59000%.
[64] The interest rate on these loans is subject to 1 Month NIBOR, which as of March 31, 2024 was 4.61000%.
[65] The interest rate on these loans is subject to 1 Month CDOR, which as of December 31, 2023 was 5.45500%.
[66] The interest rate on these loans is subject to 1 Month CDOR, which as of March 31, 2024 was 5.29000%.