XML 28 R12.htm IDEA: XBRL DOCUMENT v3.25.0.1
Consolidated Schedule of Investments - Schedule of Investments (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 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 $ 2,449,272 $ 2,488,715
Investment, interest rate, paid in kind [1],[2],[3],[4]   3.30%
Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 9.10% [5] 9.10% [3],[6],[7],[8],[9]
Sierra Senior Loan Strategy JV I LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 89.01% 89.01% [3],[6],[8],[9],[10]
Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 16.00% 16.00% [6],[8],[9],[11]
Waccamaw River LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 20.00% 20.00% [3],[6],[8],[9],[11]
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   $ 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   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   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   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   41,053
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   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   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   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   15,470
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   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   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   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   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 51,189 [12] 165,576 [13]
Gross Reductions (43,028) [14] (60,342) [15]
Amount of Realized Gain (Loss) (4,179) (64)
Amount of Unrealized Gain (Loss) (9,169) 7,260
Fair value at ending balance 397,236 402,423
Amount of Interest or Dividends Credited to Income 39,605 [16] 36,382 [17]
Affiliate investments | Celebration Bidco, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 18,391 [18] 0
Gross Additions 200 [12],[18] 18,391 [13]
Gross Reductions 0 [14],[18] 0 [15]
Amount of Realized Gain (Loss) 0 [18] 0
Amount of Unrealized Gain (Loss) (915) [18] 0
Fair value at ending balance [18] 17,676 18,391
Amount of Interest or Dividends Credited to Income 837 [16],[18] 0 [17]
Affiliate investments | Coastal Marina Holdings, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 34,677 [18] 0
Gross Additions 6,049 [12],[18] 35,243 [13]
Gross Reductions 0 [14],[18] 0 [15]
Amount of Realized Gain (Loss) 0 [18] 0
Amount of Unrealized Gain (Loss) (833) [18] (566)
Fair value at ending balance [18] 39,893 34,677
Amount of Interest or Dividends Credited to Income 2,139 [16],[18] 1,086 [17]
Affiliate investments | Eclipse Business Capital, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 155,889 [18] 144,884
Gross Additions 27,728 [12],[18] 35,561 [13]
Gross Reductions (23,091) [14],[18] (35,530) [15]
Amount of Realized Gain (Loss) 0 [18] 0
Amount of Unrealized Gain (Loss) (9,035) [18] 10,974
Fair value at ending balance [18] 151,491 155,889
Amount of Interest or Dividends Credited to Income 16,034 [16],[18] 15,253 [17]
Affiliate investments | Hylan Datacom And Electrical, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 10,449 [18] 12,511
Gross Additions 333 [12],[18] 496 [13]
Gross Reductions (9,637) [14],[18] 0 [15]
Amount of Realized Gain (Loss) (4,179) [18] 0
Amount of Unrealized Gain (Loss) 3,034 [18] (2,558)
Fair value at ending balance [18] 0 10,449
Amount of Interest or Dividends Credited to Income 492 [16],[18] 1,257 [17]
Affiliate investments | Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 41,053 40,088
Gross Additions 0 [12] 0 [13]
Gross Reductions 0 [14] 0 [15]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (292) 965
Fair value at ending balance 40,761 41,053
Amount of Interest or Dividends Credited to Income 5,709 [16] 5,709 [17]
Affiliate investments | Rocade Holdings LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 73,957 [18] 0
Gross Additions 12,098 [12],[18] 73,113 [13]
Gross Reductions (2,222) [14],[18] 0 [15]
Amount of Realized Gain (Loss) 0 [18] 0
Amount of Unrealized Gain (Loss) (590) [18] 844
Fair value at ending balance [18] 83,243 73,957
Amount of Interest or Dividends Credited to Income 8,598 [16],[18] 5,612 [17]
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 0 [12] 0 [13]
Gross Reductions 0 [14] (1,780) [15]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 2,281 3,002
Fair value at ending balance 41,453 39,172
Amount of Interest or Dividends Credited to Income 2,225 [16] 5,655 [17]
Affiliate investments | Skyvault Holdings LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] 0  
Gross Additions [12],[18] 4,781  
Gross Reductions [14],[18] 0  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] 0  
Fair value at ending balance [18] 4,781 0
Amount of Interest or Dividends Credited to Income [16],[18] 36  
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 0 [12] 0 [13]
Gross Reductions (5,991) [14] (17,733) [15]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (166) 759
Fair value at ending balance 7,208 13,365
Amount of Interest or Dividends Credited to Income 0 [16] 0 [17]
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 0 [12] 2,480 [13]
Gross Reductions (2,087) [14] 0 [15]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (2,653) (7,222)
Fair value at ending balance 10,730 15,470
Amount of Interest or Dividends Credited to Income 3,535 [16] 1,460 [17]
Affiliate investments | 1888 Industrial Services, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0 1,263
Gross Additions [13]   55
Gross Reductions [15]   (1,197)
Amount of Realized Gain (Loss)   (775)
Amount of Unrealized Gain (Loss)   654
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income [17]   194
Affiliate investments | Kemmerer Operations LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0 2,746
Gross Additions [13]   237
Gross Reductions [15]   (4,102)
Amount of Realized Gain (Loss)   711
Amount of Unrealized Gain (Loss)   408
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income [17]   156
Control investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 90,920 106,328
Gross Additions 14,141 [19] 8,578 [20]
Gross Reductions (10,327) [21] (986) [22]
Amount of Realized Gain (Loss) (845) 0
Amount of Unrealized Gain (Loss) (14,226) (23,000)
Fair value at ending balance 79,663 90,920
Amount of Interest or Dividends Credited to Income 2,613 [23] 3,313 [24]
Control investments | Black Angus Steakhouses, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 12,035 [25] 14,794 [26]
Gross Additions 1,114 [19],[25] 1,330 [20],[26]
Gross Reductions 0 [21],[25] 0 [22],[26]
Amount of Realized Gain (Loss) 0 [25] 0 [26]
Amount of Unrealized Gain (Loss) (10,405) [25] (4,089) [26]
Fair value at ending balance [25] 2,744 12,035
Amount of Interest or Dividends Credited to Income 1,028 [23],[25] 1,401 [24],[26]
Control investments | MVC Automotive Group GmbH    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 25,192 [25] 16,824
Gross Additions 10,340 [19],[25] 2,613 [20]
Gross Reductions (9,620) [21],[25] 0 [22]
Amount of Realized Gain (Loss) (862) [25] 0
Amount of Unrealized Gain (Loss) (11,309) [25] 5,755
Fair value at ending balance [25] 13,741 25,192
Amount of Interest or Dividends Credited to Income 495 [23],[25] 587 [24]
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 0 [19] 0 [20]
Gross Reductions (695) [21] (964) [22]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (299) 131
Fair value at ending balance 11 1,005
Amount of Interest or Dividends Credited to Income 48 [23] 95 [24]
Control investments | Security Holdings B.V.    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 52,688 [25] 72,872
Gross Additions 2,687 [19],[25] 4,635 [20]
Gross Reductions (12) [21],[25] (22) [22]
Amount of Realized Gain (Loss) 17 [25] 0
Amount of Unrealized Gain (Loss) 7,787 [25] (24,797)
Fair value at ending balance [25] 63,167 52,688
Amount of Interest or Dividends Credited to Income 1,042 [23],[25] 1,230 [24]
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 [27] 0 0
Gross Additions [13],[27]   41
Gross Reductions [15],[27]   (41)
Amount of Realized Gain (Loss) [27]   (418)
Amount of Unrealized Gain (Loss) [27]   418
Fair value at ending balance [27]   0
Amount of Interest or Dividends Credited to Income [17],[27]   $ 67
Interest [27]   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 [27] 0 $ 1,263
Gross Additions [13],[27]   14
Gross Reductions [15],[27]   (1,156)
Amount of Realized Gain (Loss) [27]   (357)
Amount of Unrealized Gain (Loss) [27]   236
Fair value at ending balance [27]   0
Amount of Interest or Dividends Credited to Income [17],[27]   $ 127
Interest [27]   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 [27] 0 $ 0
Gross Additions [13],[27]   0
Gross Reductions [15],[27]   0
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   0
Fair value at ending balance [27]   0
Amount of Interest or Dividends Credited to Income [17],[27]   $ 0
Investment owned, balance (in shares) [27]   7,546.76
Investment, Identifier [Axis]: 1WorldSync, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 7,049  
Interest [28],[29],[30] 4.75%  
Interest [28],[29],[30] 9.50%  
Investment, Identifier [Axis]: 1WorldSync, Inc., IT Consulting & Other Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31] $ 7,124  
Interest [28],[29],[31] 5.00%  
Interest [28],[29],[31] 10.40%  
Investment, Identifier [Axis]: A.T. Holdings II LTD, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[32],[33] $ 8,479  
Interest [29],[32],[33] 6.70%  
Investment, interest rate, paid in kind [29],[32],[33] 7.60%  
Investment, Identifier [Axis]: A.T. Holdings II LTD, Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[4] $ 11,688  
Interest [3],[4] 14.30%  
Investment, Identifier [Axis]: AD Bidco, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 10,099  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 9.60%  
Investment, Identifier [Axis]: AD Bidco, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 9.60%  
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 ending balance [1],[2],[3],[4] $ 5,392  
Interest [1],[2],[3],[4] 9.25%  
Interest [1],[2],[3],[4] 14.60%  
Investment, Identifier [Axis]: ADB Safegate, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 6,523  
Interest [28],[29],[30],[33] 9.25%  
Interest [28],[29],[30],[33] 13.70%  
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 550  
Investment owned, balance (in shares) [29],[34] 348.68  
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 [4],[11] $ 537  
Fair value at ending balance [4],[11]   $ 537
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   348.68
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 [2],[4],[35] 6,402  
Fair value at ending balance [2],[4],[35]   $ 6,402
Interest [2],[4],[35]   7.50%
Interest [2],[4],[35]   13.00%
Investment, Identifier [Axis]: AMMC CLO 22, Limited Series 2018-22A, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[36] 1,733  
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 [3],[10],[11] 2,468  
Fair value at ending balance [3],[10],[11]   $ 2,468
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 [3],[10] 1,476  
Fair value at ending balance [3],[10]   1,476
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 [2],[3],[4],[37] 2,505  
Fair value at ending balance [2],[3],[4],[37]   $ 2,505
Interest [2],[3],[4],[37]   5.50%
Interest [2],[3],[4],[37]   9.40%
Investment, Identifier [Axis]: APC1 Holding, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 2,370  
Interest [28],[29],[33],[38] 5.40%  
Interest [28],[29],[33],[38] 8.70%  
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 [2],[3],[4],[39] $ 2,086  
Fair value at ending balance [2],[3],[4],[39]   $ 2,086
Interest [2],[3],[4],[39]   7.25%
Interest [2],[3],[4],[39]   11.60%
Investment, Identifier [Axis]: APOG Bidco Pty Ltd, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[40] $ 864  
Interest [28],[29],[33],[40] 7.30%  
Interest [28],[29],[33],[40] 12.00%  
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 [1],[2],[4] $ 19,938  
Fair value at ending balance [1],[2],[4]   $ 19,938
Interest [1],[2],[4]   7.50%
Interest [1],[2],[4]   13.00%
Investment, Identifier [Axis]: ASC Communications, LLC, Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 869  
Investment owned, balance (in shares) [29] 25,718.2  
Investment, Identifier [Axis]: ASC Communications, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 7,344  
Interest [28],[29],[41] 4.75%  
Interest [28],[29],[41] 9.40%  
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 [4] $ 703  
Fair value at ending balance [4]   $ 703
Investment owned, balance (in shares) [4],[6],[8],[9]   25,718.2
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[35] 9,035  
Fair value at ending balance [2],[4],[35]   $ 9,035
Interest [2],[4],[35]   4.75%
Interest [2],[4],[35]   10.10%
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 [2],[4],[7],[35] (9)  
Fair value at ending balance [2],[4],[7],[35]   $ (9)
Interest [2],[4],[7],[35]   4.75%
Interest [2],[4],[7],[35]   10.10%
Investment, Identifier [Axis]: ASC Communications, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 0  
Interest [5],[28],[29],[41] 4.75%  
Interest [5],[28],[29],[41] 9.40%  
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 [1],[2],[4] $ 8,250  
Fair value at ending balance [1],[2],[4]   $ 8,250
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   10.90%
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 [1],[2],[4],[7] 0  
Fair value at ending balance [1],[2],[4],[7]   $ 0
Interest [1],[2],[4],[7]   5.50%
Interest [1],[2],[4],[7]   10.90%
Investment, Identifier [Axis]: ATL II MRO Holdings Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 19,021  
Interest [28],[29],[30] 5.25%  
Interest [28],[29],[30] 9.80%  
Investment, Identifier [Axis]: ATL II MRO Holdings Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (49)  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 9.80%  
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]: AVSC Holding Corp., First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[41] $ 148  
Interest [28],[41] 3.50%  
Interest [28],[41] 8.20%  
Investment, Identifier [Axis]: AVSC Holding Corp., First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[41] $ 2  
Interest [28],[41] 5.50%  
Interest [28],[41] 10.20%  
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class A Convertible Preferred Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[11] $ 5,858  
Investment owned, balance (in shares) [4],[6],[8],[9],[11] 5,000  
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 ending balance [4],[11] $ 1,950  
Investment owned, balance (in shares) [4],[6],[8],[9],[11] 1,651  
Investment, Identifier [Axis]: Accelerant Holdings, Class A Convertible Preferred Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 6,347  
Investment owned, balance (in shares) [29],[34] 5,018  
Investment, Identifier [Axis]: Accelerant Holdings, Class B Convertible Preferred Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 2,285  
Investment owned, balance (in shares) [29],[34] 1,657  
Investment, Identifier [Axis]: Accelerant Holdings, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 7,840  
Investment owned, balance (in shares) [29],[34] 4,243  
Investment, Identifier [Axis]: Acclime Holdings HK Limited, Business services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[28],[29],[31] $ 2,461  
Interest [3],[28],[29],[31] 6.25%  
Interest [3],[28],[29],[31] 11.60%  
Investment, Identifier [Axis]: Acclime Holdings HK Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31],[33] $ 2,438  
Interest [28],[29],[31],[33] 6.75%  
Interest [28],[29],[31],[33] 11.80%  
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [4],[11] $ 512  
Investment owned, balance (in shares) [4],[6],[8],[9],[11] 437,623.3  
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[4] $ 11,768  
Interest [1],[2],[4] 5.25%  
Interest [1],[2],[4] 10.80%  
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[4],[7] $ 1,602  
Interest [1],[2],[4],[7] 5.25%  
Interest [1],[2],[4],[7] 10.80%  
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 0  
Investment owned, balance (in shares) [29],[34] 437,623.3  
Investment, Identifier [Axis]: Accurus Aerospace Corporation, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 11,612  
Interest [28],[29],[30] 5.75%  
Interest [28],[29],[30] 10.30%  
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 1,768  
Interest [5],[28],[29],[30] 5.75%  
Interest [5],[28],[29],[30] 10.30%  
Investment, Identifier [Axis]: Acogroup, Business Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[3],[4],[37] $ 7,226  
Interest [2],[3],[4],[37] 4.65%  
Interest [2],[3],[4],[37] 8.60%  
Investment, interest rate, paid in kind [2],[3],[4],[37] 2.30%  
Investment, Identifier [Axis]: Acogroup, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 5,412  
Interest [28],[29],[33],[42] 2.90%  
Interest [28],[29],[33],[42] 4.00%  
Investment, interest rate, paid in kind [28],[29],[33],[42] 6.60%  
Investment, Identifier [Axis]: Adhefin International, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 1,716  
Interest [5],[28],[29],[33],[38] 5.75%  
Interest [5],[28],[29],[33],[38] 9.10%  
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 ending balance [2],[3],[4],[7],[37] $ 1,778  
Interest [2],[3],[4],[7],[37] 6.50%  
Interest [2],[3],[4],[7],[37] 10.40%  
Investment, Identifier [Axis]: Adhefin International, Industrial Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [2],[3],[4],[37] $ 300  
Interest [2],[3],[4],[37] 10.50%  
Investment, interest rate, paid in kind [2],[3],[4],[37] 14.40%  
Investment, Identifier [Axis]: Adhefin International, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 326  
Interest [28],[29],[33],[38] 10.50%  
Investment, interest rate, paid in kind [28],[29],[33],[38] 13.20%  
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 ending balance [4],[11] $ 697  
Investment owned, balance (in shares) [4],[6],[8],[9],[11] 8,717.76  
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 ending balance [4],[11] $ 180  
Investment owned, balance (in shares) [4],[6],[8],[9],[11] 2,248.46  
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 ending balance [4],[11] $ 0  
Investment owned, balance (in shares) [4],[6],[8],[9],[11] 8,717.76  
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 ending balance [4],[11] $ 0  
Investment owned, balance (in shares) [4],[6],[8],[9],[11] 2,248.46  
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class A1 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 593  
Investment owned, balance (in shares) [29],[34] 8,717.76  
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class A2 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 153  
Investment owned, balance (in shares) [29],[34] 2,248.46  
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class B1 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 0  
Investment owned, balance (in shares) [29],[34] 8,717.76  
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Class B2 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 0  
Investment owned, balance (in shares) [29],[34] 2,248.46  
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 ending balance $ 3,587  
Interest 9.00%  
Investment, Identifier [Axis]: Air Canada 2020-2 Class B Pass Through Trust, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance $ 2,411  
Interest 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 ending balance [1],[2],[4] $ 7,633  
Interest [1],[2],[4] 5.00%  
Interest [1],[2],[4] 10.30%  
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 ending balance [1],[2],[4] $ 1,296  
Interest [1],[2],[4] 6.25%  
Interest [1],[2],[4] 11.70%  
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 ending balance [1],[2],[4],[7] $ 3,226  
Interest [1],[2],[4],[7] 6.25%  
Interest [1],[2],[4],[7] 11.70%  
Investment, Identifier [Axis]: AirX Climate Solutions, Inc,Diversified Manufacturing,Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [1],[2],[4],[7] $ (12)  
Interest [1],[2],[4],[7] 6.25%  
Interest [1],[2],[4],[7] 11.70%  
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 2,710  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.40%  
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 3,828  
Interest [5],[28],[29],[30] 5.75%  
Interest [5],[28],[29],[30] 10.20%  
Investment, Identifier [Axis]: AirX Climate Solutions, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 5.75%  
Interest [5],[28],[29],[30] 10.20%  
Investment, Identifier [Axis]: AlliA Insurance Brokers NV, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[42] $ 4,569  
Interest [5],[28],[29],[33],[42] 5.75%  
Interest [5],[28],[29],[33],[42] 8.90%  
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 [2],[3],[4],[7],[37] $ 3,443  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 3,443
Interest [2],[3],[4],[7],[37]   6.25%
Interest [2],[3],[4],[7],[37]   10.20%
Investment, Identifier [Axis]: Alpine SG, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[36] $ 22,949  
Interest [28],[29],[30],[36] 6.00%  
Interest [28],[29],[30],[36] 10.70%  
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 [1],[2],[4],[10] $ 22,792  
Fair value at ending balance [1],[2],[4],[10]   $ 22,792
Interest [1],[2],[4],[10]   6.00%
Interest [1],[2],[4],[10]   11.50%
Investment, Identifier [Axis]: Amalfi Midco, Class B Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 1,239  
Investment owned, balance (in shares) [29],[33],[34] 98,906,608  
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 [3],[4],[11] $ 1,188  
Fair value at ending balance [3],[4],[11]   $ 1,188
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   93,165,208
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Subordinated Loan Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4] 4,824  
Fair value at ending balance [3],[4]   $ 4,824
Interest [3],[4]   2.00%
Investment, interest rate, paid in kind [3],[4]   9.00%
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Warrant    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4],[11] 529  
Fair value at ending balance [3],[4],[11]   $ 529
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   380,385
Investment, Identifier [Axis]: Amalfi Midco, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 290  
Interest [29],[33] 17.50%  
Investment, Identifier [Axis]: Amalfi Midco, Subordinated Loan Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 5,492  
Interest [29],[33] 2.00%  
Investment, interest rate, paid in kind [29],[33] 9.00%  
Investment, Identifier [Axis]: Amalfi Midco, Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 919  
Investment owned, balance (in shares) [29],[33],[34] 380,385  
Investment, Identifier [Axis]: Americo Chemical Products, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 119  
Investment owned, balance (in shares) [29],[34] 88,110  
Investment, Identifier [Axis]: Americo Chemical Products, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 2,611  
Interest [28],[29],[41] 5.00%  
Interest [28],[29],[41] 9.60%  
Investment, Identifier [Axis]: Americo Chemical Products, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ (7)  
Interest [5],[28],[29],[41] 5.00%  
Interest [5],[28],[29],[41] 9.60%  
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 [4],[11] $ 89  
Fair value at ending balance [4],[11]   $ 89
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   88,110
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 [2],[4],[35] 1,920  
Fair value at ending balance [2],[4],[35]   $ 1,920
Interest [2],[4],[35]   5.50%
Interest [2],[4],[35]   10.90%
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 [2],[4],[7],[35] (4)  
Fair value at ending balance [2],[4],[7],[35]   $ (4)
Interest [2],[4],[7],[35]   5.50%
Interest [2],[4],[7],[35]   10.90%
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 [1],[2],[4] 2,988  
Fair value at ending balance [1],[2],[4]   $ 2,988
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   11.40%
Investment, Identifier [Axis]: Amtech LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 242  
Fair value at ending balance [1],[2],[4],[7]   $ 242
Interest [1],[2],[4],[7]   5.50%
Interest [1],[2],[4],[7]   11.40%
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 [2],[3],[4],[37] 3,173  
Fair value at ending balance [2],[3],[4],[37]   $ 3,173
Interest [2],[3],[4],[37]   6.25%
Interest [2],[3],[4],[37]   10.20%
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 [2],[3],[4],[37] 958  
Fair value at ending balance [2],[3],[4],[37]   $ 958
Interest [2],[3],[4],[37]   6.25%
Interest [2],[3],[4],[37]   10.20%
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 [2],[3],[4],[37] 1,678  
Fair value at ending balance [2],[3],[4],[37]   $ 1,678
Interest [2],[3],[4],[37]   7.00%
Interest [2],[3],[4],[37]   11.00%
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 [1],[2],[3],[4] 1,002  
Fair value at ending balance [1],[2],[3],[4]   $ 1,002
Interest [1],[2],[3],[4]   6.25%
Interest [1],[2],[3],[4]   11.90%
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 2,995  
Interest [28],[29],[33],[38] 6.20%  
Interest [28],[29],[33],[38] 9.30%  
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 1,576  
Interest [28],[29],[33],[42] 6.20%  
Interest [28],[29],[33],[42] 9.90%  
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 904  
Interest [28],[29],[33],[42] 6.95%  
Interest [28],[29],[33],[42] 10.70%  
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, First Lien Senior Secured Term Loan 4    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 1,008  
Interest [28],[29],[30],[33] 6.20%  
Interest [28],[29],[30],[33] 11.50%  
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 [2],[4],[43] $ 9,404  
Fair value at ending balance [2],[4],[43]   $ 9,404
Investment, interest rate, paid in kind [2],[4],[43]   8.00%
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 [2],[4],[7] 817  
Fair value at ending balance [2],[4],[7]   $ 817
Investment, interest rate, paid in kind [2],[4],[7]   10.00%
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 [2],[3],[4],[39] 1,858  
Fair value at ending balance [2],[3],[4],[39]   $ 1,858
Interest [2],[3],[4],[39]   5.75%
Interest [2],[3],[4],[39]   11.10%
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 [2],[3],[4],[39] 1,358  
Fair value at ending balance [2],[3],[4],[39]   $ 1,358
Interest [2],[3],[4],[39]   6.50%
Interest [2],[3],[4],[39]   11.70%
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 [3],[4] 285  
Fair value at ending balance [3],[4]   $ 285
Investment, interest rate, paid in kind [3],[4]   8.00%
Investment, Identifier [Axis]: Apex Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[44] $ 3,180  
Interest [28],[29],[33],[44] 6.25%  
Interest [28],[29],[33],[44] 11.30%  
Investment, Identifier [Axis]: Apex Bidco Limited, Subordinated Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 297  
Investment, interest rate, paid in kind [29],[33] 8.00%  
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 [3],[10] $ 5,885  
Fair value at ending balance [3],[10]   $ 5,885
Investment, Identifier [Axis]: Apidos CLO XXIV, Series 2016-24A, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [33],[36] 3,272  
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 [3],[4],[11] 0  
Fair value at ending balance [3],[4],[11]   $ 0
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   48
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[45] 1,982  
Fair value at ending balance [2],[3],[4],[45]   $ 1,982
Interest [2],[3],[4],[45]   6.50%
Interest [2],[3],[4],[45]   10.40%
Investment, interest rate, paid in kind [2],[3],[4],[45]   1.50%
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 [3],[4],[11] 4  
Fair value at ending balance [3],[4],[11]   $ 4
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   13
Investment, Identifier [Axis]: Aptus 1829. GmbH, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 0  
Investment owned, balance (in shares) [29],[33],[34] 48  
Investment, Identifier [Axis]: Aptus 1829. GmbH, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 1,994  
Interest [28],[29],[33],[42] 5.75%  
Interest [28],[29],[33],[42] 8.40%  
Investment, Identifier [Axis]: Aptus 1829. GmbH, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 40  
Investment owned, balance (in shares) [29],[33],[34] 13  
Investment, Identifier [Axis]: Apus Bidco Limited, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[39] $ 3,621  
Fair value at ending balance [2],[3],[4],[39]   $ 3,621
Interest [2],[3],[4],[39]   5.50%
Interest [2],[3],[4],[39]   10.70%
Investment, Identifier [Axis]: Apus Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46] $ 3,608  
Interest [28],[29],[33],[46] 5.50%  
Interest [28],[29],[33],[46] 10.70%  
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[44] $ 6,314  
Interest [5],[28],[29],[33],[44] 6.00%  
Interest [5],[28],[29],[33],[44] 10.60%  
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[44] $ 2,119  
Interest [28],[29],[33],[44] 10.50%  
Investment, interest rate, paid in kind [28],[29],[33],[44] 15.10%  
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 [2],[3],[4],[7],[47] $ 5,839  
Fair value at ending balance [2],[3],[4],[7],[47]   $ 5,839
Interest [2],[3],[4],[7],[47]   6.00%
Interest [2],[3],[4],[7],[47]   11.20%
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 [2],[3],[4],[47] 1,706  
Fair value at ending balance [2],[3],[4],[47]   $ 1,706
Interest [2],[3],[4],[47]   10.50%
Investment, interest rate, paid in kind [2],[3],[4],[47]   15.70%
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 [2],[3],[4],[7],[37] 3,791  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 3,791
Interest [2],[3],[4],[7],[37]   5.75%
Interest [2],[3],[4],[7],[37]   9.70%
Investment, Identifier [Axis]: Arc Education, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 3,807  
Interest [5],[28],[29],[33],[38] 5.97%  
Interest [5],[28],[29],[33],[38] 9.30%  
Investment, Identifier [Axis]: Arch Global Precision LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 8,769  
Interest [28],[29],[30] 4.75%  
Interest [28],[29],[30] 9.50%  
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 [1],[2],[4] $ 8,993  
Fair value at ending balance [1],[2],[4]   $ 8,993
Interest [1],[2],[4]   4.75%
Interest [1],[2],[4]   10.20%
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 [2],[3],[4],[37] 6,304  
Fair value at ending balance [2],[3],[4],[37]   $ 6,304
Interest [2],[3],[4],[37]   6.50%
Interest [2],[3],[4],[37]   10.40%
Investment, Identifier [Axis]: Archimede, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 5,676  
Interest [28],[29],[33],[38] 6.50%  
Interest [28],[29],[33],[38] 9.80%  
Investment, Identifier [Axis]: Argus Bidco Limited, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 0  
Investment owned, balance (in shares) [29],[33],[34] 464  
Investment, Identifier [Axis]: Argus Bidco Limited, Equity Loan Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 33  
Investment owned, balance (in shares) [29],[33] 41,560  
Investment, interest rate, paid in kind [29],[33] 10.00%  
Investment, Identifier [Axis]: Argus Bidco Limited, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 1,773  
Interest [28],[29],[33],[38] 4.00%  
Interest [28],[29],[33],[38] 7.20%  
Investment, interest rate, paid in kind [28],[29],[33],[38] 2.80%  
Investment, Identifier [Axis]: Argus Bidco Limited, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 127  
Interest [28],[29],[30],[33] 4.00%  
Interest [28],[29],[30],[33] 8.80%  
Investment, interest rate, paid in kind [28],[29],[30],[33] 2.80%  
Investment, Identifier [Axis]: Argus Bidco Limited, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[44] $ 1,584  
Interest [5],[28],[29],[33],[44] 4.00%  
Interest [5],[28],[29],[33],[44] 8.90%  
Investment, interest rate, paid in kind [5],[28],[29],[33],[44] 2.80%  
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 [3],[4],[11] $ 0  
Fair value at ending balance [3],[4],[11]   $ 0
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   464
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Equity Loan Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4] 42  
Fair value at ending balance [3],[4]   $ 42
Investment owned, balance (in shares) [3],[4],[6],[8],[9]   41,560
Investment, interest rate, paid in kind [3],[4]   10.00%
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 [1],[2],[3],[4] 125  
Fair value at ending balance [1],[2],[3],[4]   $ 125
Interest [1],[2],[3],[4]   4.00%
Interest [1],[2],[3],[4]   9.30%
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 [2],[3],[4],[37] 307  
Fair value at ending balance [2],[3],[4],[37]   $ 307
Interest [2],[3],[4],[37]   4.00%
Interest [2],[3],[4],[37]   7.60%
Investment, interest rate, paid in kind [2],[3],[4],[37]   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 [2],[3],[4],[37] 1,408  
Fair value at ending balance [2],[3],[4],[37]   $ 1,408
Interest [2],[3],[4],[37]   6.75%
Interest [2],[3],[4],[37]   10.70%
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 [2],[3],[4],[39] 1,632  
Fair value at ending balance [2],[3],[4],[39]   $ 1,632
Interest [2],[3],[4],[39]   4.00%
Interest [2],[3],[4],[39]   8.90%
Investment, interest rate, paid in kind [2],[3],[4],[39]   3.30%
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 [2],[3],[4],[7],[39] (28)  
Fair value at ending balance [2],[3],[4],[7],[39]   $ (28)
Interest [2],[3],[4],[7],[39]   6.50%
Interest [2],[3],[4],[7],[39]   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 [3],[4] 42  
Fair value at ending balance [3],[4]   $ 42
Investment owned, balance (in shares) [3],[4],[6],[8],[9]   41,560
Investment, interest rate, paid in kind [3],[4]   10.00%
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 [3],[4] 734  
Fair value at ending balance [3],[4]   $ 734
Investment, interest rate, paid in kind [3],[4]   10.50%
Investment, Identifier [Axis]: Argus Bidco Limited, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 33  
Investment owned, balance (in shares) [29],[33] 41,560  
Investment, interest rate, paid in kind [29],[33] 10.00%  
Investment, Identifier [Axis]: Argus Bidco Limited, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 777  
Investment, interest rate, paid in kind [29],[33] 10.50%  
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 [1],[2],[4] $ 3,790  
Fair value at ending balance [1],[2],[4]   $ 3,790
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   10.90%
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 [1],[2],[4] 4,709  
Fair value at ending balance [1],[2],[4]   $ 4,709
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   10.90%
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 5,637  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.10%  
Investment, Identifier [Axis]: Artemis Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 256  
Interest [5],[28],[29],[33],[38] 5.00%  
Interest [5],[28],[29],[33],[38] 8.00%  
Investment, Identifier [Axis]: Astra Bidco Limited, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 396  
Interest [28],[29],[33],[38] 5.50%  
Interest [28],[29],[33],[38] 8.50%  
Investment, Identifier [Axis]: Astra Bidco Limited, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[46] $ 2,365  
Interest [5],[28],[29],[33],[46] 5.75%  
Interest [5],[28],[29],[33],[46] 10.50%  
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 [2],[3],[4],[7],[39] $ 2,380  
Fair value at ending balance [2],[3],[4],[7],[39]   $ 2,380
Interest [2],[3],[4],[7],[39]   5.25%
Interest [2],[3],[4],[7],[39]   10.40%
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 [2],[3],[4],[45] 1,427  
Fair value at ending balance [2],[3],[4],[45]   $ 1,427
Interest [2],[3],[4],[45]   7.25%
Interest [2],[3],[4],[45]   11.30%
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 [2],[3],[4],[47] 788  
Fair value at ending balance [2],[3],[4],[47]   $ 788
Interest [2],[3],[4],[47]   7.25%
Interest [2],[3],[4],[47]   12.40%
Investment, Identifier [Axis]: Auxi International, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 1,351  
Interest [28],[29],[33],[42] 7.25%  
Interest [28],[29],[33],[42] 10.40%  
Investment, Identifier [Axis]: Auxi International, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46] $ 782  
Interest [28],[29],[33],[46] 6.25%  
Interest [28],[29],[33],[46] 11.20%  
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[48] $ 1,967  
Interest [5],[28],[29],[33],[48] 4.50%  
Interest [5],[28],[29],[33],[48] 8.90%  
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 [2],[3],[4],[49],[50] $ 2,190  
Fair value at ending balance [2],[3],[4],[49],[50]   $ 2,190
Interest [2],[3],[4],[49],[50]   5.00%
Interest [2],[3],[4],[49],[50]   9.40%
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 [2],[4],[10],[35] 29,162  
Fair value at ending balance [2],[4],[10],[35]   $ 29,162
Interest [2],[4],[10],[35]   8.50%
Interest [2],[4],[10],[35]   14.00%
Investment, Identifier [Axis]: Azalea Buyer, Inc., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 288  
Investment owned, balance (in shares) [29],[34] 192,307.7  
Investment, Identifier [Axis]: Azalea Buyer, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 4,785  
Interest [5],[28],[29],[41] 5.25%  
Interest [5],[28],[29],[41] 9.90%  
Investment, Identifier [Axis]: Azalea Buyer, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 0  
Interest [5],[28],[29],[41] 5.25%  
Interest [5],[28],[29],[41] 9.90%  
Investment, Identifier [Axis]: Azalea Buyer, Inc., Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 1,805  
Investment, interest rate, paid in kind [29] 12.00%  
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 [4],[11] $ 288  
Fair value at ending balance [4],[11]   $ 288
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   192,307.7
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 4,809  
Fair value at ending balance [1],[2],[4],[7]   $ 4,809
Interest [1],[2],[4],[7]   5.25%
Interest [1],[2],[4],[7]   10.70%
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] (3)  
Fair value at ending balance [1],[2],[4],[7]   $ (3)
Interest [1],[2],[4],[7]   5.25%
Interest [1],[2],[4],[7]   10.70%
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 [4] 1,529  
Fair value at ending balance [4]   $ 1,529
Investment, interest rate, paid in kind [4]   12.00%
Investment, Identifier [Axis]: BKF Buyer, Inc., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 1,045  
Investment owned, balance (in shares) [29],[34] 1,004,467  
Investment, Identifier [Axis]: BKF Buyer, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 8,015  
Interest [28],[29],[41] 5.00%  
Interest [28],[29],[41] 9.30%  
Investment, Identifier [Axis]: BKF Buyer, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ (52)  
Interest [5],[28],[29],[41] 5.00%  
Interest [5],[28],[29],[41] 9.30%  
Investment, Identifier [Axis]: BNI Global, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[51] $ 9,302  
Interest [28],[29],[51] 5.50%  
Interest [28],[29],[51] 8.50%  
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 [1],[2],[4] $ 13,401  
Fair value at ending balance [1],[2],[4]   $ 13,401
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.40%
Investment, Identifier [Axis]: BPG Holdings IV Corp, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 12,560  
Interest [28],[29],[30] 6.00%  
Interest [28],[29],[30] 10.60%  
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 [2],[4],[37] $ 9,541  
Fair value at ending balance [2],[4],[37]   $ 9,541
Interest [2],[4],[37]   9.50%
Interest [2],[4],[37]   13.40%
Investment, Identifier [Axis]: BVI Medical, Inc., Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[38] $ 9,482  
Interest [28],[29],[38] 9.50%  
Interest [28],[29],[38] 12.80%  
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 [2],[3],[4],[45] $ 3,314  
Fair value at ending balance [2],[3],[4],[45]   $ 3,314
Interest [2],[3],[4],[45]   4.75%
Interest [2],[3],[4],[45]   8.60%
Investment, Identifier [Axis]: Bariacum S.A, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 3,107  
Interest [28],[29],[33],[42] 4.75%  
Interest [28],[29],[33],[42] 7.30%  
Investment, Identifier [Axis]: Basin Innovation Group, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 13,949  
Interest [5],[28],[29],[41] 5.00%  
Interest [5],[28],[29],[41] 9.50%  
Investment, Identifier [Axis]: Basin Innovation Group, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ (28)  
Interest [5],[28],[29],[41] 5.00%  
Interest [5],[28],[29],[41] 9.50%  
Investment, Identifier [Axis]: Benify (Bennevis AB), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[52] $ 854  
Interest [28],[29],[33],[52] 5.25%  
Interest [28],[29],[33],[52] 8.40%  
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 [2],[3],[4],[53] $ 1,096  
Fair value at ending balance [2],[3],[4],[53]   $ 1,096
Interest [2],[3],[4],[53]   5.25%
Interest [2],[3],[4],[53]   9.30%
Investment, Identifier [Axis]: Beyond Risk Management, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 5,322  
Interest [5],[28],[29],[30] 4.50%  
Interest [5],[28],[29],[30] 9.20%  
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 [1],[2],[4],[7] $ 2,944  
Fair value at ending balance [1],[2],[4],[7]   $ 2,944
Interest [1],[2],[4],[7]   4.50%
Interest [1],[2],[4],[7]   10.00%
Investment, Identifier [Axis]: Bidwax, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 7,088  
Interest [28],[29],[33],[42] 6.40%  
Interest [28],[29],[33],[42] 9.20%  
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 [2],[3],[4],[45] $ 7,672  
Fair value at ending balance [2],[3],[4],[45]   $ 7,672
Interest [2],[3],[4],[45]   6.50%
Interest [2],[3],[4],[45]   10.50%
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 [2],[3],[4],[54] 2,020  
Fair value at ending balance [2],[3],[4],[54]   $ 2,020
Interest [2],[3],[4],[54]   5.50%
Interest [2],[3],[4],[54]   10.80%
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[55] 353  
Fair value at ending balance [2],[3],[4],[55]   $ 353
Interest [2],[3],[4],[55]   5.75%
Interest [2],[3],[4],[55]   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 [2],[3],[4],[39] 801  
Fair value at ending balance [2],[3],[4],[39]   $ 801
Interest [2],[3],[4],[39]   5.75%
Interest [2],[3],[4],[39]   11.10%
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 [2],[3],[4],[7],[37] 2,266  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 2,266
Interest [2],[3],[4],[7],[37]   4.25%
Interest [2],[3],[4],[7],[37]   5.50%
Investment, interest rate, paid in kind [2],[3],[4],[7],[37]   2.80%
Investment, Identifier [Axis]: Biolam Group, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[42],[56] $ 1,406  
Interest [5],[28],[29],[33],[42],[56] 4.25%  
Interest [5],[28],[29],[33],[42],[56] 5.50%  
Investment, interest rate, paid in kind [5],[28],[29],[33],[42],[56] 2.80%  
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 [26] $ 7,166 $ 5,647
Gross Additions [20],[26]   1,330
Gross Reductions [22],[26]   0
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   189
Fair value at ending balance $ 0 [29],[36],[56],[57] 7,166 [26]
Amount of Interest or Dividends Credited to Income [24],[26]   $ 1,401
Interest [26]   14.40%
Investment, interest rate, paid in kind [29],[36],[56],[57] 10.00%  
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 [26] $ 4,869 $ 9,147
Gross Additions [20],[26]   0
Gross Reductions [22],[26]   0
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   (4,278)
Fair value at ending balance $ 2,744 [28],[29],[36],[41],[56],[57] 4,869 [26]
Amount of Interest or Dividends Credited to Income [24],[26]   $ 0
Investment, interest rate, paid in kind 14.40% [28],[29],[36],[41],[56],[57] 10.00% [26]
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [25],[58] $ 7,166  
Gross Additions [19],[25],[58] 1,114  
Gross Reductions [21],[25],[58] 0  
Amount of Realized Gain (Loss) [25],[58] 0  
Amount of Unrealized Gain (Loss) [25],[58] (5,536)  
Fair value at ending balance [25],[58] 2,744 $ 7,166
Amount of Interest or Dividends Credited to Income [23],[25],[58] $ 1,028  
Investment, interest rate, paid in kind [25] 14.40%  
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 4    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [25],[58] $ 4,869  
Gross Additions [19],[25],[58] 0  
Gross Reductions [21],[25],[58] 0  
Amount of Realized Gain (Loss) [25],[58] 0  
Amount of Unrealized Gain (Loss) [25],[58] (4,869)  
Fair value at ending balance [25],[58] 0 4,869
Amount of Interest or Dividends Credited to Income [23],[25],[58] $ 0  
Investment, interest rate, paid in kind [25] 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 [2],[4],[10],[35] $ 7,166  
Fair value at ending balance [2],[4],[10],[35]   $ 7,166
Investment, interest rate, paid in kind [2],[4],[10],[35]   14.40%
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 [4],[10],[43] 4,869  
Fair value at ending balance [4],[10],[43]   $ 4,869
Investment, interest rate, paid in kind [4],[10],[43]   10.00%
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[10],[11] 0  
Fair value at ending balance [4],[10],[11]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[10],[11]   44.6
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [26] 0 $ 0
Gross Additions [20],[26]   0
Gross Reductions [22],[26]   0
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   0
Fair value at ending balance $ 0 [29],[34],[36] 0 [26]
Amount of Interest or Dividends Credited to Income [24],[26]   $ 0
Investment owned, balance (in shares) 44.6 [29],[34],[36] 44.6 [26]
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 [25] $ 0  
Gross Additions [19],[25] 0  
Gross Reductions [21],[25] 0  
Amount of Realized Gain (Loss) [25] 0  
Amount of Unrealized Gain (Loss) [25] 0  
Fair value at ending balance [25] 0 $ 0
Amount of Interest or Dividends Credited to Income [23],[25] $ 0  
Investment owned, balance (in shares) [25] 44.6  
Investment, Identifier [Axis]: Bounteous, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 4,081  
Interest [28],[29],[30] 4.75%  
Interest [28],[29],[30] 9.40%  
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 [1],[2],[4],[7] $ 1,605  
Fair value at ending balance [1],[2],[4],[7]   $ 1,605
Interest [1],[2],[4],[7]   5.25%
Interest [1],[2],[4],[7]   10.70%
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   $ 28,802
Interest   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 [4] 15,003  
Fair value at ending balance [4]   $ 15,003
Investment owned, balance (in shares) [4],[6],[8],[9]   14,618
Investment, interest rate, paid in kind [4]   7.00%
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Municipal Revenue Bond    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance $ 27,859  
Interest 11.50%  
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Preferred Stock- Series C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 14,618  
Investment owned, balance (in shares) [29] 14,618  
Investment, interest rate, paid in kind [29] 7.00%  
Investment, Identifier [Axis]: BrightSign LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 4,657  
Interest [28],[29],[41] 5.50%  
Interest [28],[29],[41] 10.20%  
Investment, Identifier [Axis]: BrightSign LLC, LLC units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 1,174  
Investment owned, balance (in shares) [29] 1,107,492.71  
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 [1],[2],[4] $ 4,540  
Fair value at ending balance [1],[2],[4]   $ 4,540
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.20%
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 [4],[11] 930  
Fair value at ending balance [4],[11]   $ 930
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   1,107,492.71
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 839  
Fair value at ending balance [1],[2],[4],[7]   $ 839
Interest [1],[2],[4],[7]   5.75%
Interest [1],[2],[4],[7]   11.20%
Investment, Identifier [Axis]: BrightSign LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 1,085  
Interest [5],[28],[29],[41] 5.50%  
Interest [5],[28],[29],[41] 10.20%  
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 [4] $ 4,750  
Fair value at ending balance [4]   $ 4,750
Interest [4]   8.00%
Investment, Identifier [Axis]: Brightpay Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 386  
Interest [5],[28],[29],[33],[38] 5.00%  
Interest [5],[28],[29],[33],[38] 8.20%  
Investment, Identifier [Axis]: Brightpay Limited, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 1,720  
Interest [28],[29],[33],[42] 5.00%  
Interest [28],[29],[33],[42] 8.60%  
Investment, interest rate, paid in kind [28],[29],[33],[42] 0.30%  
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 [2],[3],[4],[7],[37] $ 2,250  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 2,250
Interest [2],[3],[4],[7],[37]   5.00%
Interest [2],[3],[4],[7],[37]   9.00%
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, First Lien Senior Secured Bond    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance $ 507  
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 [2],[3],[4],[47] $ 14,403  
Fair value at ending balance [2],[3],[4],[47]   $ 14,403
Interest [2],[3],[4],[47]   7.00%
Interest [2],[3],[4],[47]   11.90%
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46] $ 14,454  
Interest [28],[29],[33],[46] 7.00%  
Interest [28],[29],[33],[46] 12.70%  
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 [1],[2],[4],[10] $ 2,596  
Fair value at ending balance [1],[2],[4],[10]   $ 2,596
Interest [1],[2],[4],[10]   4.00%
Interest [1],[2],[4],[10]   9.50%
Investment, Identifier [Axis]: Brook & Whittle Holding Corp., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[30],[36] $ 2,461  
Interest [28],[30],[36] 4.00%  
Interest [28],[30],[36] 8.70%  
Investment, Identifier [Axis]: Brown Machine Group Holdings, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 5,716  
Interest [28],[29],[41] 6.00%  
Interest [28],[29],[41] 10.70%  
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 [2],[4],[35] $ 5,954  
Fair value at ending balance [2],[4],[35]   $ 5,954
Interest [2],[4],[35]   5.75%
Interest [2],[4],[35]   11.20%
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 [4],[11] 462  
Fair value at ending balance [4],[11]   $ 462
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   455
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Auto Parts & Equipment, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[35] 4,368  
Fair value at ending balance [2],[4],[35]   $ 4,368
Interest [2],[4],[35]   9.00%
Interest [2],[4],[35]   14.40%
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 450  
Investment owned, balance (in shares) [29],[34] 455  
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31] $ 4,364  
Interest [28],[29],[31] 9.00%  
Interest [28],[29],[31] 14.20%  
Investment, Identifier [Axis]: CAi Software, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 12,455  
Interest [28],[29],[30] 5.25%  
Interest [28],[29],[30] 10.10%  
Investment, Identifier [Axis]: CAi Software, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 1,246  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 10.10%  
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 [1],[2],[4] $ 4,636  
Fair value at ending balance [1],[2],[4]   $ 4,636
Interest [1],[2],[4]   6.25%
Interest [1],[2],[4]   11.90%
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] 1,275  
Fair value at ending balance [1],[2],[4]   $ 1,275
Interest [1],[2],[4]   6.25%
Interest [1],[2],[4]   11.90%
Investment, Identifier [Axis]: CAi Software, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] (61)  
Fair value at ending balance [1],[2],[4],[7]   $ (61)
Interest [1],[2],[4],[7]   6.25%
Interest [1],[2],[4],[7]   11.90%
Investment, Identifier [Axis]: CCFF Buyer, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 5,809  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 9.80%  
Investment, Identifier [Axis]: CCFF Buyer, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 235  
Investment owned, balance (in shares) [29] 233  
Investment, Identifier [Axis]: CCFF Buyer, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (15)  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 9.80%  
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 [1],[2],[4] $ 12,968  
Fair value at ending balance [1],[2],[4]   $ 12,968
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.30%
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 [1],[2],[4] 1,344  
Fair value at ending balance [1],[2],[4]   $ 1,344
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.30%
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[11] 1,190  
Fair value at ending balance [4],[11]   $ 1,190
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   657
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 [1],[2],[4],[7] (33)  
Fair value at ending balance [1],[2],[4],[7]   $ (33)
Interest [1],[2],[4],[7]   5.75%
Interest [1],[2],[4],[7]   11.30%
Investment, Identifier [Axis]: CGI Parent, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 14,008  
Interest [28],[29],[30] 4.50%  
Interest [28],[29],[30] 9.10%  
Investment, Identifier [Axis]: CGI Parent, LLC, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 1,710  
Investment owned, balance (in shares) [29],[34] 657  
Investment, Identifier [Axis]: CGI Parent, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 4.50%  
Interest [5],[28],[29],[30] 9.10%  
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 12,140  
Interest [28],[29],[30] 6.00%  
Interest [28],[29],[30] 7.80%  
Investment, interest rate, paid in kind [28],[29],[30] 2.50%  
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 1,523  
Interest [28],[29],[30] 6.00%  
Interest [28],[29],[30] 7.80%  
Investment, interest rate, paid in kind [28],[29],[30] 2.50%  
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 [1],[2],[4] $ 13,399  
Fair value at ending balance [1],[2],[4]   $ 13,399
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   10.20%
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 [2],[4],[35] 3,742  
Fair value at ending balance [2],[4],[35]   $ 3,742
Interest [2],[4],[35]   5.00%
Interest [2],[4],[35]   10.40%
Investment, interest rate, paid in kind [2],[4],[35]   0.30%
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 [2],[4],[35] 609  
Fair value at ending balance [2],[4],[35]   $ 609
Interest [2],[4],[35]   5.00%
Interest [2],[4],[35]   10.40%
Investment, interest rate, paid in kind [2],[4],[35]   0.30%
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 [4],[11] 59  
Fair value at ending balance [4],[11]   $ 59
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   12,635
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 3,381  
Interest [28],[29],[30] 5.25%  
Interest [28],[29],[30] 9.50%  
Investment, interest rate, paid in kind [28],[29],[30] 0.30%  
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 0  
Investment owned, balance (in shares) [29],[34] 12,635  
Investment, Identifier [Axis]: CSL DualCom, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[59] $ 2,016  
Interest [5],[28],[29],[33],[59] 4.75%  
Interest [5],[28],[29],[33],[59] 9.50%  
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 [2],[3],[4],[7],[55] $ 2,052  
Fair value at ending balance [2],[3],[4],[7],[55]   $ 2,052
Interest [2],[3],[4],[7],[55]   5.25%
Interest [2],[3],[4],[7],[55]   10.50%
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 [10],[35] 4,684  
Fair value at ending balance [10],[35]   $ 4,684
Interest [10],[35]   4.25%
Interest [10],[35]   9.70%
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, 2024 LIFO Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 4,211  
Interest [28],[29],[30] 10.00%  
Investment, interest rate, paid in kind [28],[29],[30] 14.70%  
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 695  
Investment owned, balance (in shares) [29],[34] 21,031  
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, First Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 2,860  
Interest [28],[29],[30] 10.00%  
Investment, interest rate, paid in kind [28],[29],[30] 14.70%  
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC, Second Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 597  
Interest [28],[29],[30] 12.00%  
Investment, interest rate, paid in kind [28],[29],[30] 16.70%  
Investment, Identifier [Axis]: CW Group Holdings, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 2,732  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.80%  
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 [1],[2],[4] $ 2,759  
Fair value at ending balance [1],[2],[4]   $ 2,759
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.40%
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 [4],[11] 289  
Fair value at ending balance [4],[11]   $ 289
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   161,290.32
Investment, Identifier [Axis]: CW Group Holdings, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 371  
Investment owned, balance (in shares) [29] 161,290.32  
Investment, Identifier [Axis]: Caldwell & Gregory LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 18,833  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.30%  
Investment, Identifier [Axis]: Caldwell & Gregory LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (34)  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.30%  
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Class A Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 0  
Investment owned, balance (in shares) [29],[33],[34] 500,000  
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Class C - Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 0  
Investment owned, balance (in shares) [29],[33],[34] 74,712.64  
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Class X Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 0  
Investment owned, balance (in shares) [29],[33],[34] 45,604  
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 0  
Investment owned, balance (in shares) [29],[33],[34] 14.37  
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[56],[60] $ 360  
Interest [28],[29],[33],[56],[60] 7.00%  
Investment, interest rate, paid in kind [28],[29],[33],[56],[60] 10.30%  
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class A Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4],[11] $ 0  
Fair value at ending balance [3],[4],[11]   $ 0
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   500,000
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class C - Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4],[11] 0  
Fair value at ending balance [3],[4],[11]   $ 0
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   257,127.45
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 [2],[3],[4],[61] 1,322  
Fair value at ending balance [2],[3],[4],[61]   $ 1,322
Interest [2],[3],[4],[61]   3.50%
Interest [2],[3],[4],[61]   9.00%
Investment, interest rate, paid in kind [2],[3],[4],[61]   3.50%
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Super Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[29],[33] $ 185  
Investment, interest rate, paid in kind [5],[29],[33] 15.00%  
Investment, Identifier [Axis]: Caribou Holding Company, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 4,236  
Interest [28],[29],[30],[33] 7.64%  
Interest [28],[29],[30],[33] 12.50%  
Investment, Identifier [Axis]: Caribou Holding Company, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 682  
Investment owned, balance (in shares) [29],[33],[34] 681,818  
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 [1],[2],[3],[4] $ 4,240  
Fair value at ending balance [1],[2],[3],[4]   $ 4,240
Interest [1],[2],[3],[4]   7.64%
Interest [1],[2],[3],[4]   14.00%
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 [3],[4],[11] 982  
Fair value at ending balance [3],[4],[11]   $ 982
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   681,818
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 beginning balance [3],[4],[11] 0  
Fair value at ending balance [3],[4],[11]   $ 0
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   45,604
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 [1],[2],[4],[7] (8)  
Fair value at ending balance [1],[2],[4],[7]   $ (8)
Interest [1],[2],[4],[7]   10.40%
Interest [1],[2],[4],[7]   5.00%
Investment, Identifier [Axis]: Cascade Residential Services LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 3,742  
Interest [5],[28],[29],[30] 6.00%  
Interest [5],[28],[29],[30] 10.60%  
Investment, Identifier [Axis]: Cascade Residential Services LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 312  
Interest [28],[29],[30] 6.00%  
Interest [28],[29],[30] 10.60%  
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 [1],[2],[4],[7] $ 2,567  
Fair value at ending balance [1],[2],[4],[7]   $ 2,567
Interest [1],[2],[4],[7]   5.00%
Interest [1],[2],[4],[7]   10.40%
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 [3],[4],[7] 943  
Fair value at ending balance [3],[4],[7]   $ 943
Investment, Identifier [Axis]: Catawba River Limited, Structured - Junior Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] 2,365  
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 [1],[4] 6,214  
Fair value at ending balance [1],[4]   $ 6,214
Interest [1],[4]   8.00%
Interest [1],[4]   13.30%
Investment, Identifier [Axis]: Celebration Bidco, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [27] 12,177 $ 0
Gross Additions [13],[27]   12,177
Gross Reductions [15],[27]   0
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   0
Fair value at ending balance $ 11,262 [29],[34] 12,177 [27]
Amount of Interest or Dividends Credited to Income [17],[27]   $ 0
Investment owned, balance (in shares) 1,243,071 [29],[34] 1,243,071 [27]
Investment, Identifier [Axis]: Celebration Bidco, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] $ 12,177  
Gross Additions [12],[18] 0  
Gross Reductions [14],[18] 0  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] (915)  
Fair value at ending balance [18] 11,262 $ 12,177
Amount of Interest or Dividends Credited to Income [16],[18] $ 0  
Investment owned, balance (in shares) [18] 1,243,071  
Investment, Identifier [Axis]: Celebration Bidco, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[30] $ 6,414  
Interest [29],[30] 8.00%  
Investment, interest rate, paid in kind [29],[30] 12.60%  
Investment, Identifier [Axis]: Celebration Bidco, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] $ 6,214  
Gross Additions [12],[18] 200  
Gross Reductions [14],[18] 0  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] 0  
Fair value at ending balance [18] 6,414 6,214
Amount of Interest or Dividends Credited to Income [16],[18] $ 837  
Interest [18] 8.00%  
Investment, interest rate, paid in kind [18] 12.60%  
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 [27] $ 6,214 0
Gross Additions [13],[27]   6,214
Gross Reductions [15],[27]   0
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   0
Fair value at ending balance [27]   6,214
Amount of Interest or Dividends Credited to Income [17],[27]   $ 0
Interest [27]   8.00%
Interest [27]   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 [2],[3],[4],[37] 3,144  
Fair value at ending balance [2],[3],[4],[37]   $ 3,144
Interest [2],[3],[4],[37]   5.25%
Interest [2],[3],[4],[37]   9.20%
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 2,996  
Interest [28],[29],[33],[38] 5.25%  
Interest [28],[29],[33],[38] 8.30%  
Investment, Identifier [Axis]: Ceres Pharma NV, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 3,167  
Interest [28],[29],[33],[42] 6.00%  
Interest [28],[29],[33],[42] 8.90%  
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 [2],[3],[4],[45] $ 3,307  
Fair value at ending balance [2],[3],[4],[45]   $ 3,307
Interest [2],[3],[4],[45]   6.00%
Interest [2],[3],[4],[45]   10.10%
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 [1],[2],[4],[7] 6,602  
Fair value at ending balance [1],[2],[4],[7]   $ 6,602
Interest [1],[2],[4],[7]   5.75%
Interest [1],[2],[4],[7]   11.30%
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 [1],[2],[4] 599  
Fair value at ending balance [1],[2],[4]   $ 599
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   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) [4],[6],[8],[9],[11]   2,407,825
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 [4],[11] 12,177  
Fair value at ending balance [4],[11]   $ 12,177
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   1,243,071
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 [4] 6,868  
Fair value at ending balance [4]   $ 6,868
Interest [4]   8.00%
Investment, interest rate, paid in kind [4]   10.00%
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 [4] 15,649  
Fair value at ending balance [4]   $ 15,649
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 [27] 12,160 [4],[11] 0
Gross Additions [13],[27]   12,732
Gross Reductions [15],[27]   0
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   (572)
Fair value at ending balance $ 16,852 [29],[34] 12,160 [4],[11],[27]
Amount of Interest or Dividends Credited to Income [17],[27]   $ 0
Investment owned, balance (in shares) 3,518,097 [29],[34] 2,407,825 [27]
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, LLC Units 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] $ 12,160  
Gross Additions [12],[18] 5,551  
Gross Reductions [14],[18] 0  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] (859)  
Fair value at ending balance [18] 16,852 $ 12,160
Amount of Interest or Dividends Credited to Income [16],[18] $ 0  
Investment owned, balance (in shares) [18] 3,518,097  
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] $ 15,649  
Gross Additions [12],[18] 95  
Gross Reductions [14],[18] 0  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] 26  
Fair value at ending balance [18] 15,770 15,649
Amount of Interest or Dividends Credited to Income [16],[18] $ 1,428  
Interest [18] 8.00%  
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] $ 6,868  
Gross Additions [12],[18] 403  
Gross Reductions [14],[18] 0  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] 0  
Fair value at ending balance [18] 7,271 6,868
Amount of Interest or Dividends Credited to Income [16],[18] $ 711  
Investment, interest rate, paid in kind [18] 8.00%  
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 [27] $ 15,649 0
Gross Additions [13],[27]   15,632
Gross Reductions [15],[27]   0
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   17
Fair value at ending balance $ 15,770 [29] 15,649 [27]
Amount of Interest or Dividends Credited to Income [17],[27]   $ 715
Interest 8.00% [29] 8.00% [27]
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 [27] $ 6,868 $ 0
Gross Additions [13],[27]   6,879
Gross Reductions [15],[27]   0
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   (11)
Fair value at ending balance $ 7,271 [29] 6,868 [27]
Amount of Interest or Dividends Credited to Income [17],[27]   $ 371
Interest [29] 8.00%  
Investment, interest rate, paid in kind [27]   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 [1],[2],[3],[4] $ 1,294  
Fair value at ending balance [1],[2],[3],[4]   $ 1,294
Interest [1],[2],[3],[4]   6.25%
Interest [1],[2],[3],[4]   11.60%
Investment, Identifier [Axis]: Cobham Slip Rings SAS, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31],[33] $ 1,303  
Interest [28],[29],[31],[33] 6.25%  
Interest [28],[29],[31],[33] 10.90%  
Investment, Identifier [Axis]: Coherus Biosciences, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 3,903  
Interest [28],[29],[30] 8.00%  
Interest [28],[29],[30] 12.60%  
Investment, Identifier [Axis]: Coherus Biosciences, Inc., Royalty Rights    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 5,834  
Investment owned, balance (in shares) [29] 3,626,518  
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Class B Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 175  
Investment owned, balance (in shares) [29],[34] 33,324.7  
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 [4],[11] $ 176  
Fair value at ending balance [4],[11]   $ 176
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   33,324.69
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 [2],[4],[35] 13,345  
Fair value at ending balance [2],[4],[35]   $ 13,345
Interest [2],[4],[35]   6.75%
Interest [2],[4],[35]   12.10%
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[11] 142  
Fair value at ending balance [4],[11]   $ 142
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   46,085.6
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] 622  
Fair value at ending balance [4]   $ 622
Interest [4]   11.00%
Investment, interest rate, paid in kind [4]   1.00%
Investment, Identifier [Axis]: Compass Precision, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 154  
Investment owned, balance (in shares) [29],[34] 46,085.6  
Investment, Identifier [Axis]: Compass Precision, LLC, Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 640  
Interest [29] 11.00%  
Investment, interest rate, paid in kind [29] 1.00%  
Investment, Identifier [Axis]: Comply365, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 18,663  
Interest [28],[29],[41] 5.00%  
Interest [28],[29],[41] 9.70%  
Investment, Identifier [Axis]: Comply365, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 0  
Interest [5],[28],[29],[41] 5.00%  
Interest [5],[28],[29],[41] 9.70%  
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 [1],[2],[4] $ 5,525  
Fair value at ending balance [1],[2],[4]   $ 5,525
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   10.40%
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 [1],[2],[4] 12,997  
Fair value at ending balance [1],[2],[4]   $ 12,997
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   10.40%
Investment, Identifier [Axis]: Comply365, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] (22)  
Fair value at ending balance [1],[2],[4],[7]   $ (22)
Interest [1],[2],[4],[7]   5.00%
Interest [1],[2],[4],[7]   10.40%
Investment, Identifier [Axis]: Contabo Finco S.À R.L, Internet Software & Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[37] 5,103  
Fair value at ending balance [2],[3],[4],[37]   $ 5,103
Interest [2],[3],[4],[37]   5.25%
Interest [2],[3],[4],[37]   9.20%
Investment, Identifier [Axis]: Contabo Finco S.À.R.L, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 4,822  
Interest [28],[29],[33],[38] 5.15%  
Interest [28],[29],[33],[38] 8.20%  
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 [3],[11] $ 133  
Fair value at ending balance [3],[11]   $ 133
Investment owned, balance (in shares) [3],[6],[8],[9],[11]   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 [3],[4],[43] 22,976  
Fair value at ending balance [3],[4],[43]   $ 22,976
Interest [3],[4],[43]   9.80%
Investment, Identifier [Axis]: Coyo Uprising GmbH, Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 206  
Investment owned, balance (in shares) [29],[33],[34] 440  
Investment, Identifier [Axis]: Coyo Uprising GmbH, Class B Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 381  
Investment owned, balance (in shares) [29],[33],[34] 191  
Investment, Identifier [Axis]: Coyo Uprising GmbH, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 4,590  
Interest [5],[28],[29],[33],[38] 6.50%  
Interest [5],[28],[29],[33],[38] 10.10%  
Investment, interest rate, paid in kind [5],[28],[29],[33],[38] 0.30%  
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 [3],[4],[11] $ 211  
Fair value at ending balance [3],[4],[11]   $ 211
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   440
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class B Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4],[11] 505  
Fair value at ending balance [3],[4],[11]   $ 505
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   191
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[7],[37] 4,659  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 4,659
Interest [2],[3],[4],[7],[37]   3.25%
Interest [2],[3],[4],[7],[37]   6.30%
Investment, interest rate, paid in kind [2],[3],[4],[7],[37]   3.40%
Investment, Identifier [Axis]: DISA Holdings Corp., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 6,950  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.50%  
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 [2],[4],[7],[35] $ 5,944  
Fair value at ending balance [2],[4],[7],[35]   $ 5,944
Interest [2],[4],[7],[35]   5.50%
Interest [2],[4],[7],[35]   10.80%
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 [2],[4],[7],[35] 90  
Fair value at ending balance [2],[4],[7],[35]   $ 90
Interest [2],[4],[7],[35]   5.50%
Interest [2],[4],[7],[35]   10.80%
Investment, Identifier [Axis]: DISA Holdings Corp., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.50%  
Investment, Identifier [Axis]: DataServ Integrations, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31] $ 1,871  
Interest [28],[29],[31] 5.50%  
Interest [28],[29],[31] 10.00%  
Investment, Identifier [Axis]: DataServ Integrations, LLC, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 103  
Investment owned, balance (in shares) [29],[34] 96,153.9  
Investment, Identifier [Axis]: DataServ Integrations, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31] $ 0  
Interest [5],[28],[29],[31] 5.50%  
Interest [5],[28],[29],[31] 10.00%  
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] $ 1,873  
Fair value at ending balance [1],[2],[4]   $ 1,873
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.10%
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 [4],[11] 96  
Fair value at ending balance [4],[11]   $ 96
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   96,153.85
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] (7)  
Fair value at ending balance [1],[2],[4],[7]   $ (7)
Interest [1],[2],[4],[7]   5.75%
Interest [1],[2],[4],[7]   11.10%
Investment, Identifier [Axis]: David Wood Baking UK Ltd, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46] $ 818  
Interest [28],[29],[33],[46] 10.00%  
Interest [28],[29],[33],[46] 14.70%  
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 $ 41  
Fair value at ending balance   $ 41
Investment owned, balance (in shares) [6],[8],[9]   1,280.8
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[35] 1,638  
Fair value at ending balance [2],[4],[35]   $ 1,638
Interest [2],[4],[35]   6.25%
Interest [2],[4],[35]   11.70%
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[35] (9)  
Fair value at ending balance [2],[4],[35]   $ (9)
Interest [2],[4],[35]   6.25%
Interest [2],[4],[35]   11.70%
Investment, Identifier [Axis]: DecksDirect, LLC, Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 0  
Investment owned, balance (in shares) [29],[34] 1,016.1  
Investment, Identifier [Axis]: DecksDirect, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 0  
Investment owned, balance (in shares) [29],[34] 1,280.8  
Investment, Identifier [Axis]: DecksDirect, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 1,383  
Interest [28],[29],[30] 6.25%  
Interest [28],[29],[30] 10.90%  
Investment, Identifier [Axis]: DecksDirect, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 301  
Interest [5],[28],[29],[30] 6.25%  
Interest [5],[28],[29],[30] 10.90%  
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 [1],[2],[4] $ 6,416  
Fair value at ending balance [1],[2],[4]   $ 6,416
Interest [1],[2],[4]   6.50%
Interest [1],[2],[4]   12.00%
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 333  
Investment owned, balance (in shares) [29],[34] 2,769  
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 717  
Interest [29] 11.00%  
Investment, interest rate, paid in kind [29] 1.50%  
Investment, Identifier [Axis]: Dragon Bidco, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 2,585  
Interest [28],[29],[33],[38] 5.50%  
Interest [28],[29],[33],[38] 8.60%  
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 [2],[3],[4],[45] $ 2,734  
Fair value at ending balance [2],[3],[4],[45]   $ 2,734
Interest [2],[3],[4],[45]   6.75%
Interest [2],[3],[4],[45]   10.90%
Investment, Identifier [Axis]: DreamStart Bidco SAS (d/b/a SmartTrade), Diversified Financial Services, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[37] 2,349  
Fair value at ending balance [2],[3],[4],[37]   $ 2,349
Interest [2],[3],[4],[37]   5.25%
Interest [2],[3],[4],[37]   9.20%
Investment, Identifier [Axis]: DreamStart Bidco SAS (d/b/a SmartTrade), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 2,202  
Interest [28],[29],[33],[38] 5.25%  
Interest [28],[29],[33],[38] 8.60%  
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 [3],[10] $ 1,647  
Fair value at ending balance [3],[10]   $ 1,647
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 [3],[10],[11] 3,319  
Fair value at ending balance [3],[10],[11]   3,319
Investment, Identifier [Axis]: Dryden 49 Senior Loan Fund, Series 2017-49A, Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [33],[34],[36] 437  
Investment, Identifier [Axis]: Dune Group, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 91  
Interest [5],[28],[29],[33],[38] 4.00%  
Interest [5],[28],[29],[33],[38] 6.60%  
Investment, Identifier [Axis]: Dune Group, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 193  
Interest [28],[29],[30],[33] 4.00%  
Interest [28],[29],[30],[33] 8.80%  
Investment, Identifier [Axis]: Dune Group, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 1,164  
Interest [28],[29],[30],[33] 4.00%  
Interest [28],[29],[30],[33] 6.30%  
Investment, interest rate, paid in kind [28],[29],[30],[33] 2.30%  
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 [2],[3],[4],[7],[37] $ 115  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 115
Interest [2],[3],[4],[7],[37]   6.00%
Interest [2],[3],[4],[7],[37]   10.00%
Investment, Identifier [Axis]: Dune Group, Health Care Equipment, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[3],[4] 1,401  
Fair value at ending balance [1],[2],[3],[4]   $ 1,401
Interest [1],[2],[3],[4]   6.00%
Interest [1],[2],[3],[4]   11.30%
Investment, Identifier [Axis]: Dunlipharder B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 998  
Interest [28],[29],[30],[33] 5.25%  
Interest [28],[29],[30],[33] 9.90%  
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 [1],[2],[3],[4] $ 993  
Fair value at ending balance [1],[2],[3],[4]   $ 993
Interest [1],[2],[3],[4]   6.10%
Interest [1],[2],[3],[4]   11.50%
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 [1],[2],[4] 14,479  
Fair value at ending balance [1],[2],[4]   $ 14,479
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.20%
Investment, Identifier [Axis]: Dwyer Instruments, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 14,433  
Interest [28],[29],[30] 4.75%  
Interest [28],[29],[30] 9.50%  
Investment, Identifier [Axis]: EB Development, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 1,971  
Interest [5],[28],[29],[33],[38] 5.50%  
Interest [5],[28],[29],[33],[38] 8.30%  
Investment, Identifier [Axis]: EFC International, Automotive, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[11] $ 301  
Fair value at ending balance [4],[11]   $ 301
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   163.83
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 [4] 764  
Fair value at ending balance [4]   $ 764
Interest [4]   11.00%
Investment, interest rate, paid in kind [4]   2.50%
Investment, Identifier [Axis]: EFC International, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 380  
Investment owned, balance (in shares) [29],[34] 163.83  
Investment, Identifier [Axis]: EFC International, Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 797  
Interest [29] 11.00%  
Investment, interest rate, paid in kind [29] 2.50%  
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 [1],[2],[4] $ 11,155  
Fair value at ending balance [1],[2],[4]   $ 11,155
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.50%
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Diversified Manufacturing, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 2,233  
Fair value at ending balance [1],[2],[4],[7]   $ 2,233
Interest [1],[2],[4],[7]   5.75%
Interest [1],[2],[4],[7]   11.50%
Investment, Identifier [Axis]: EMI Porta Holdco LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 11,696  
Interest [28],[29],[30] 5.75%  
Interest [28],[29],[30] 10.50%  
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 543  
Interest [5],[28],[29],[30] 5.75%  
Interest [5],[28],[29],[30] 10.50%  
Investment, Identifier [Axis]: EPS NASS Parent, Inc., Electrical Components & Equipment, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] $ 5,740  
Fair value at ending balance [1],[2],[4]   $ 5,740
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.10%
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 [4],[11] 491  
Fair value at ending balance [4],[11]   $ 491
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   530.92
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Air Transportation, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] 8,844  
Fair value at ending balance [1],[2],[4]   $ 8,844
Interest [1],[2],[4]   7.00%
Interest [1],[2],[4]   12.50%
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 417  
Investment owned, balance (in shares) [29],[34] 530.92  
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 9,450  
Interest [28],[29],[41] 7.00%  
Interest [28],[29],[41] 11.70%  
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 10,100 $ 5,500
Investment, Identifier [Axis]: Eclipse Business Capital, LLC units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] 145,799  
Gross Additions [12],[18] 66  
Gross Reductions [14],[18] 0  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] (9,010)  
Fair value at ending balance [18] 136,855 145,799
Amount of Interest or Dividends Credited to Income [16],[18] $ 14,894  
Investment owned, balance (in shares) [18] 89,447,396  
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 [4] $ 145,799  
Fair value at ending balance [4]   $ 145,799
Investment owned, balance (in shares) [4],[6],[8],[9]   89,447,396
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[7],[35] 5,545  
Fair value at ending balance [4],[7],[35]   $ 5,545
Interest [4],[7],[35]   7.25%
Interest [4],[7],[35]   12.60%
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 [4] 4,545  
Fair value at ending balance [4]   $ 4,545
Interest [4]   7.50%
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 136,855  
Investment owned, balance (in shares) [29] 89,447,396  
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 [27] $ 145,799 $ 135,066
Gross Additions [13],[27]   354
Gross Reductions [15],[27]   (621)
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   11,000
Fair value at ending balance [27]   145,799
Amount of Interest or Dividends Credited to Income [17],[27]   $ 14,498
Investment owned, balance (in shares) [27]   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 [27] 5,545 $ 5,273
Gross Additions [13],[27]   35,201
Gross Reductions [15],[27]   (34,909)
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   (20)
Fair value at ending balance [27]   5,545
Amount of Interest or Dividends Credited to Income [17],[27]   $ 408
Interest [27]   7.25%
Interest [27]   12.60%
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] 5,545  
Gross Additions [12],[18] 27,656  
Gross Reductions [14],[18] (23,091)  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] (19)  
Fair value at ending balance [18] 10,091 $ 5,545
Amount of Interest or Dividends Credited to Income [16],[18] $ 817  
Interest [18] 7.25%  
Interest [18] 11.90%  
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[29],[41] $ 10,091  
Interest [5],[29],[41] 7.25%  
Interest [5],[29],[41] 11.90%  
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 [27] $ 4,545 4,545
Gross Additions [13],[27]   6
Gross Reductions [15],[27]   0
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   (6)
Fair value at ending balance [27]   4,545
Amount of Interest or Dividends Credited to Income [17],[27]   $ 347
Interest [27]   7.50%
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Second Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 4,545  
Interest [29] 7.50%  
Investment, Identifier [Axis]: Eclipse Business Capital, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] $ 4,545  
Gross Additions [12],[18] 6  
Gross Reductions [14],[18] 0  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] (6)  
Fair value at ending balance [18] 4,545 $ 4,545
Amount of Interest or Dividends Credited to Income [16],[18] $ 323  
Interest [18] 7.50%  
Investment, Identifier [Axis]: Electric Equipment & Engineering Co., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 307  
Interest [29] 10.50%  
Investment, interest rate, paid in kind [29] 3.00%  
Investment, Identifier [Axis]: Electric Equipment & Engineering Co., LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 188  
Investment owned, balance (in shares) [29],[34] 187,500  
Investment, Identifier [Axis]: Electrical Components International, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31] $ 10,410  
Interest [5],[28],[29],[31] 6.50%  
Interest [5],[28],[29],[31] 11.30%  
Investment, Identifier [Axis]: Ellkay, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 4,348  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 8.00%  
Investment, interest rate, paid in kind [28],[29],[30] 2.00%  
Investment, Identifier [Axis]: Ellkay, LLC, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] $ 4,430  
Fair value at ending balance [1],[2],[4]   $ 4,430
Interest [1],[2],[4]   6.25%
Interest [1],[2],[4]   11.50%
Investment, Identifier [Axis]: Entact Environmental Services, Inc., Environmental Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] 7,245  
Fair value at ending balance [1],[2],[4]   $ 7,245
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   10.90%
Investment, Identifier [Axis]: Entact Environmental Services, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 6,624  
Interest [28],[29],[30] 5.75%  
Interest [28],[29],[30] 10.40%  
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42],[56] $ 831  
Interest [28],[29],[33],[42],[56] 7.00%  
Investment, interest rate, paid in kind [28],[29],[33],[42],[56] 9.60%  
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33],[56] $ 453  
Interest [28],[29],[30],[33],[56] 7.00%  
Investment, interest rate, paid in kind [28],[29],[30],[33],[56] 11.30%  
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46],[56] $ 1,165  
Interest [28],[29],[33],[46],[56] 7.00%  
Investment, interest rate, paid in kind [28],[29],[33],[46],[56] 11.50%  
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[56] $ 0  
Investment, interest rate, paid in kind [29],[33],[56] 11.50%  
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 [2],[3],[4],[7],[37] $ 1,047  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 1,047
Interest [2],[3],[4],[7],[37]   4.50%
Interest [2],[3],[4],[7],[37]   8.50%
Investment, interest rate, paid in kind [2],[3],[4],[7],[37]   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 [1],[2],[3],[4] 700  
Fair value at ending balance [1],[2],[3],[4]   $ 700
Interest [1],[2],[3],[4]   4.50%
Interest [1],[2],[3],[4]   9.80%
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 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[39] 2,096  
Fair value at ending balance [2],[3],[4],[39]   $ 2,096
Interest [2],[3],[4],[39]   4.50%
Interest [2],[3],[4],[39]   9.50%
Investment, interest rate, paid in kind [2],[3],[4],[39]   2.80%
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 [3],[4] 543  
Fair value at ending balance [3],[4]   $ 543
Investment, interest rate, paid in kind [3],[4]   11.50%
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[48] $ 1,336  
Interest [5],[28],[29],[33],[48] 6.50%  
Interest [5],[28],[29],[33],[48] 11.00%  
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 [2],[3],[4],[7],[49] $ 1,535  
Fair value at ending balance [2],[3],[4],[7],[49]   $ 1,535
Interest [2],[3],[4],[7],[49]   6.50%
Interest [2],[3],[4],[7],[49]   10.80%
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 [2],[3],[4],[49] 20  
Fair value at ending balance [2],[3],[4],[49]   $ 20
Interest [2],[3],[4],[49]   6.50%
Interest [2],[3],[4],[49]   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 [1],[2],[4] 6,324  
Fair value at ending balance [1],[2],[4]   $ 6,324
Interest [1],[2],[4]   6.50%
Interest [1],[2],[4]   12.20%
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 [1],[2],[4],[7] 138  
Fair value at ending balance [1],[2],[4],[7]   $ 138
Interest [1],[2],[4],[7]   6.50%
Interest [1],[2],[4],[7]   12.20%
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 5,955  
Interest [28],[29],[30] 6.50%  
Interest [28],[29],[30] 11.40%  
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 124  
Interest [5],[28],[29],[30] 6.50%  
Interest [5],[28],[29],[30] 11.40%  
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 [2],[3],[4],[37] $ 1,933  
Fair value at ending balance [2],[3],[4],[37]   $ 1,933
Interest [2],[3],[4],[37]   6.50%
Interest [2],[3],[4],[37]   10.50%
Investment, Identifier [Axis]: FL Hawk Intermediate Holdings, Inc. (f.k.a. Fineline Technologies, Inc.), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 11,950  
Interest [28],[29],[30] 4.50%  
Interest [28],[29],[30] 9.10%  
Investment, Identifier [Axis]: FSS Buyer LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 4,740  
Interest [28],[29],[41] 5.00%  
Interest [28],[29],[41] 9.60%  
Investment, Identifier [Axis]: FSS Buyer LLC, LP Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 17  
Investment owned, balance (in shares) [29] 1,160.9  
Investment, Identifier [Axis]: FSS Buyer LLC, LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 74  
Investment owned, balance (in shares) [29],[34] 5,104.3  
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 [1],[2],[4] $ 4,768  
Fair value at ending balance [1],[2],[4]   $ 4,768
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.10%
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 [4],[11] 16  
Fair value at ending balance [4],[11]   $ 16
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   1,160.9
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 [4],[11] 72  
Fair value at ending balance [4],[11]   $ 72
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   5,104.3
Investment, Identifier [Axis]: Faraday, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 1,552  
Interest [5],[28],[29],[33],[38] 6.25%  
Interest [5],[28],[29],[33],[38] 9.60%  
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 [2],[3],[4],[7],[37] $ 1,632  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 1,632
Interest [2],[3],[4],[7],[37]   6.25%
Interest [2],[3],[4],[7],[37]   10.20%
Investment, Identifier [Axis]: Ferrellgas L.P., Oil & Gas Equipment & Services, Opco Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] 2,670  
Fair value at ending balance [4]   $ 2,670
Investment owned, balance (in shares) [4],[6],[8],[9]   2,886
Investment, Identifier [Axis]: Ferrellgas L.P., Opco Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 2,799  
Investment owned, balance (in shares) [29] 2,886  
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings Inc., Business Equipment & Services, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] $ 5,266  
Fair value at ending balance [4]   $ 5,266
Investment owned, balance (in shares) [4],[6],[8],[9]   6,582.7
Investment, interest rate, paid in kind [4]   11.00%
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings Inc., Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 5,608  
Investment owned, balance (in shares) [29] 6,582.7  
Investment, interest rate, paid in kind [29] 11.00%  
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 [3],[4] $ 2,009  
Fair value at ending balance [3],[4]   $ 2,009
Investment, interest rate, paid in kind [3],[4]   10.30%
Investment, Identifier [Axis]: Finaxy Holding, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 3,872  
Interest [28],[29],[33],[42] 6.25%  
Interest [28],[29],[33],[42] 9.30%  
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 [2],[3],[4],[37] $ 4,431  
Fair value at ending balance [2],[3],[4],[37]   $ 4,431
Interest [2],[3],[4],[37]   6.25%
Interest [2],[3],[4],[37]   10.20%
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 [1],[2],[4] 1,275  
Fair value at ending balance [1],[2],[4]   $ 1,275
Interest [1],[2],[4]   4.75%
Interest [1],[2],[4]   10.10%
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 [2],[3],[4],[7],[45] 4,230  
Fair value at ending balance [2],[3],[4],[7],[45]   $ 4,230
Interest [2],[3],[4],[7],[45]   6.25%
Interest [2],[3],[4],[7],[45]   9.90%
Investment, Identifier [Axis]: Finexvet, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 4,613  
Interest [28],[29],[33],[42] 6.50%  
Interest [28],[29],[33],[42] 10.20%  
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 [2],[4],[35] $ 4,073  
Fair value at ending balance [2],[4],[35]   $ 4,073
Interest [2],[4],[35]   4.75%
Interest [2],[4],[35]   10.10%
Investment, Identifier [Axis]: FitzMark Buyer, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 4,128  
Interest [28],[29],[41] 4.75%  
Interest [28],[29],[41] 9.40%  
Investment, Identifier [Axis]: Five Star Holding LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 564  
Investment owned, balance (in shares) [29],[34] 966.99  
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 [4],[11] $ 855  
Fair value at ending balance [4],[11]   $ 855
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   966.99
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] 13,404  
Fair value at ending balance [1],[2],[4]   $ 13,404
Interest [1],[2],[4]   7.25%
Interest [1],[2],[4]   12.60%
Investment, Identifier [Axis]: Five Star Holding LLC, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 13,198  
Interest [28],[29],[30] 7.25%  
Interest [28],[29],[30] 11.80%  
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   $ 13,187
Interest   6.90%
Investment, Identifier [Axis]: Flexential Issuer, LLC, Structured Secured Note - Class C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance $ 15,339  
Interest 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 [3],[4],[11] $ 3,196  
Fair value at ending balance [3],[4],[11]   $ 3,196
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   2,828,286
Investment, Identifier [Axis]: Flywheel Re Segregated Portfolio 2022-4, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 3,875  
Investment owned, balance (in shares) [29],[33],[34] 2,828,286  
Investment, Identifier [Axis]: Footco 40 Limited, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 217  
Interest [28],[29],[33],[38] 6.50%  
Interest [28],[29],[33],[38] 10.20%  
Investment, Identifier [Axis]: Footco 40 Limited, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[44] $ 1,588  
Interest [5],[28],[29],[33],[44] 6.50%  
Interest [5],[28],[29],[33],[44] 11.50%  
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 [2],[3],[4],[7],[39] $ 1,808  
Fair value at ending balance [2],[3],[4],[7],[39]   $ 1,808
Interest [2],[3],[4],[7],[39]   6.75%
Interest [2],[3],[4],[7],[39]   11.90%
Investment, Identifier [Axis]: Forest Buyer, LLC, Class A LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 130  
Investment owned, balance (in shares) [29],[34] 122  
Investment, Identifier [Axis]: Forest Buyer, LLC, Class B LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 124  
Investment owned, balance (in shares) [29],[34] 122  
Investment, Identifier [Axis]: Forest Buyer, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 6,091  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.60%  
Investment, Identifier [Axis]: Forest Buyer, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (2)  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.60%  
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 8,815  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 10.00%  
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 [1],[2],[4] $ 2,480  
Fair value at ending balance [1],[2],[4]   $ 2,480
Interest [1],[2],[4]   5.25%
Interest [1],[2],[4]   10.70%
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (9)  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 10.00%  
Investment, Identifier [Axis]: FragilePak LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 4,544  
Interest [28],[29],[30] 5.75%  
Interest [28],[29],[30] 10.50%  
Investment, Identifier [Axis]: FragilePak LLC, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 767  
Investment owned, balance (in shares) [29],[34] 937.5  
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 [1],[2],[4] $ 4,384  
Fair value at ending balance [1],[2],[4]   $ 4,384
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.40%
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 [4],[11] 632  
Fair value at ending balance [4],[11]   $ 632
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   937.5
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 [1],[2],[4] 10,573  
Fair value at ending balance [1],[2],[4]   $ 10,573
Interest [1],[2],[4]   6.25%
Interest [1],[2],[4]   11.60%
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 [4],[11] 880  
Fair value at ending balance [4],[11]   $ 880
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   687
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Capital Goods, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] (15)  
Fair value at ending balance [1],[2],[4],[7]   $ (15)
Interest [1],[2],[4],[7]   6.25%
Interest [1],[2],[4],[7]   11.60%
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 9,129  
Interest [5],[28],[29],[30] 6.25%  
Interest [5],[28],[29],[30] 10.90%  
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 1,350  
Investment owned, balance (in shares) [29] 687  
Investment, Identifier [Axis]: GB Eagle Buyer, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (23)  
Interest [5],[28],[29],[30] 6.25%  
Interest [5],[28],[29],[30] 10.90%  
Investment, Identifier [Axis]: GCDL LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 243  
Investment owned, balance (in shares) [29],[34] 243,243.24  
Investment, Identifier [Axis]: GCDL LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 529  
Interest [5],[28],[29],[30] 6.00%  
Interest [5],[28],[29],[30] 10.40%  
Investment, Identifier [Axis]: GCDL LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (2)  
Interest [5],[28],[29],[30] 6.00%  
Interest [5],[28],[29],[30] 10.40%  
Investment, Identifier [Axis]: GPNZ II GmbH, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 0  
Investment owned, balance (in shares) [29],[33],[34] 5,785  
Investment, Identifier [Axis]: GPNZ II GmbH, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 271  
Investment, interest rate, paid in kind [29],[33] 10.00%  
Investment, Identifier [Axis]: GPNZ II GmbH, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33] $ 33  
Investment, interest rate, paid in kind [5],[28],[29],[33] 10.00%  
Investment, Identifier [Axis]: GPNZ II GmbH, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[51],[56] $ 189  
Interest [28],[29],[33],[51],[56] 6.00%  
Interest [28],[29],[33],[51],[56] 8.70%  
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 [3],[4],[11] $ 0  
Fair value at ending balance [3],[4],[11]   $ 0
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   5,785
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 [2],[3],[4],[10] 265  
Fair value at ending balance [2],[3],[4],[10]   $ 265
Interest [2],[3],[4],[10]   10.00%
Interest [2],[3],[4],[10]   13.80%
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 [3],[4],[7] 124  
Fair value at ending balance [3],[4],[7]   $ 124
Investment, interest rate, paid in kind [3],[4],[7]   10.00%
Investment, Identifier [Axis]: Global Academic Group Limited, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[48] $ 2,284  
Interest [28],[29],[33],[48] 5.50%  
Interest [28],[29],[33],[48] 9.30%  
Investment, Identifier [Axis]: Global Academic Group Limited, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[62] $ 4,000  
Interest [5],[28],[29],[33],[62] 5.50%  
Interest [5],[28],[29],[33],[62] 9.30%  
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 [2],[3],[4],[63] $ 2,478  
Fair value at ending balance [2],[3],[4],[63]   $ 2,478
Interest [2],[3],[4],[63]   6.00%
Interest [2],[3],[4],[63]   10.30%
Investment, Identifier [Axis]: Global Academic Group Limited, Industrial Other, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[7],[64] 4,295  
Fair value at ending balance [2],[3],[4],[7],[64]   $ 4,295
Interest [2],[3],[4],[7],[64]   6.00%
Interest [2],[3],[4],[7],[64]   11.70%
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 [1],[2],[4] 12,359  
Fair value at ending balance [1],[2],[4]   $ 12,359
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   10.40%
Investment, interest rate, paid in kind [1],[2],[4]   4.50%
Investment, Identifier [Axis]: Gojo Industries, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 12,883  
Interest [28],[29],[30] 9.50%  
Interest [28],[29],[30] 9.80%  
Investment, interest rate, paid in kind [5],[28],[29],[30] 4.50%  
Investment, Identifier [Axis]: Graphpad Software, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 9,499  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.40%  
Investment, Identifier [Axis]: Graphpad Software, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (1)  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.40%  
Investment, Identifier [Axis]: Greenhill II BV, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 936  
Interest [5],[28],[29],[33],[38] 5.10%  
Interest [5],[28],[29],[33],[38] 8.30%  
Investment, Identifier [Axis]: Greenhill II BV, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[7],[37] $ 894  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 894
Interest [2],[3],[4],[7],[37]   5.25%
Interest [2],[3],[4],[7],[37]   9.20%
Investment, Identifier [Axis]: Groupe Guemas, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 4,747  
Interest [28],[29],[33],[42] 6.25%  
Interest [28],[29],[33],[42] 9.40%  
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 [2],[3],[4],[45] $ 5,006  
Fair value at ending balance [2],[3],[4],[45]   $ 5,006
Interest [2],[3],[4],[45]   6.25%
Interest [2],[3],[4],[45]   10.10%
Investment, Identifier [Axis]: Groupe Product Life, Consumer Non-cyclical, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[37] 1,059  
Fair value at ending balance [2],[3],[4],[37]   $ 1,059
Interest [2],[3],[4],[37]   6.50%
Interest [2],[3],[4],[37]   10.40%
Investment, Identifier [Axis]: Groupe Product Life, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 871  
Interest [5],[28],[29],[33],[38] 5.45%  
Interest [5],[28],[29],[33],[38] 8.50%  
Investment, Identifier [Axis]: Gulf Finance, LLC, Oil & Gas Exploration & Production, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2] $ 570  
Fair value at ending balance [1],[2]   $ 570
Interest [1],[2]   6.75%
Interest [1],[2]   12.20%
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 [2],[3],[4],[7],[63] 2,235  
Fair value at ending balance [2],[3],[4],[7],[63]   $ 2,235
Interest [2],[3],[4],[7],[63]   6.50%
Interest [2],[3],[4],[7],[63]   10.90%
Investment, Identifier [Axis]: HEKA Invest, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 4,850  
Interest [5],[28],[29],[33],[38] 6.25%  
Interest [5],[28],[29],[33],[38] 9.60%  
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 [2],[3],[4],[7],[37] $ 5,080  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 5,080
Interest [2],[3],[4],[7],[37]   6.50%
Interest [2],[3],[4],[7],[37]   10.40%
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 [1],[2],[4],[7] 11,355  
Fair value at ending balance [1],[2],[4],[7]   $ 11,355
Interest [1],[2],[4],[7]   8.50%
Interest [1],[2],[4],[7]   14.00%
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 [1],[2],[4],[7] (7)  
Fair value at ending balance [1],[2],[4],[7]   $ (7)
Interest [1],[2],[4],[7]   8.50%
Interest [1],[2],[4],[7]   14.00%
Investment, Identifier [Axis]: HTI Technology & Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 10,421  
Interest [5],[28],[29],[30] 8.50%  
Interest [5],[28],[29],[30] 13.50%  
Investment, Identifier [Axis]: HTI Technology & Industries, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (70)  
Interest [5],[28],[29],[30] 8.50%  
Interest [5],[28],[29],[30] 13.50%  
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 [1],[2],[4] $ 10,816  
Fair value at ending balance [1],[2],[4]   $ 10,816
Interest [1],[2],[4]   6.25%
Interest [1],[2],[4]   11.80%
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 11,081  
Interest [28],[29],[30] 5.75%  
Interest [28],[29],[30] 10.60%  
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[48] $ 602  
Interest [28],[29],[33],[48] 5.25%  
Interest [28],[29],[33],[48] 9.70%  
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 [2],[3],[4],[7],[63] $ 674  
Fair value at ending balance [2],[3],[4],[7],[63]   $ 674
Interest [2],[3],[4],[7],[63]   4.75%
Interest [2],[3],[4],[7],[63]   9.40%
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 [4] 11,012  
Fair value at ending balance [4]   $ 11,012
Investment, interest rate, paid in kind [4]   11.00%
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 12,865  
Investment, interest rate, paid in kind [29] 11.00%  
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 7,221  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.10%  
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.10%  
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 [2],[4],[35] $ 7,295  
Fair value at ending balance [2],[4],[35]   $ 7,295
Interest [2],[4],[35]   5.50%
Interest [2],[4],[35]   10.90%
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 [2],[4],[7],[35] 0  
Fair value at ending balance [2],[4],[7],[35]   $ 0
Interest [2],[4],[7],[35]   5.50%
Interest [2],[4],[7],[35]   10.90%
Investment, Identifier [Axis]: Heilbron (f/k/a Sucsez (Bolt Bidco B.V.)), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 3,042  
Interest [28],[29],[33],[42] 5.75%  
Interest [28],[29],[33],[42] 9.30%  
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 [2],[3],[4],[45] $ 3,155  
Fair value at ending balance [2],[3],[4],[45]   $ 3,155
Interest [2],[3],[4],[45]   5.00%
Interest [2],[3],[4],[45]   8.90%
Investment, Identifier [Axis]: HemaSource, Inc., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 124  
Investment owned, balance (in shares) [29],[34] 101,080  
Investment, Identifier [Axis]: HemaSource, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 7,267  
Interest [28],[29],[41] 4.75%  
Interest [28],[29],[41] 9.30%  
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[11] $ 101  
Fair value at ending balance [4],[11]   $ 101
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   101,080
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 [1],[2],[4] 7,101  
Fair value at ending balance [1],[2],[4]   $ 7,101
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.40%
Investment, Identifier [Axis]: HemaSource, Inc., Healthcare., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 342  
Fair value at ending balance [1],[2],[4],[7]   $ 342
Interest [1],[2],[4],[7]   6.00%
Interest [1],[2],[4],[7]   11.40%
Investment, Identifier [Axis]: HemaSource, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 0  
Interest [5],[28],[29],[41] 4.75%  
Interest [5],[28],[29],[41] 9.30%  
Investment, Identifier [Axis]: Herbalife Ltd., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[33],[41] $ 3,294  
Interest [28],[33],[41] 6.75%  
Interest [28],[33],[41] 12.10%  
Investment, Identifier [Axis]: Home Care Assistance, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 3,524  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.50%  
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 [1],[2],[4] $ 3,428  
Fair value at ending balance [1],[2],[4]   $ 3,428
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   10.50%
Investment, Identifier [Axis]: HomeX Services Group LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 1,477  
Interest [5],[28],[29],[30] 4.50%  
Interest [5],[28],[29],[30] 9.10%  
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 [2],[4],[7],[35] $ 1,274  
Fair value at ending balance [2],[4],[7],[35]   $ 1,274
Interest [2],[4],[7],[35]   5.50%
Interest [2],[4],[7],[35]   10.90%
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 [2],[4],[7],[35] (7)  
Fair value at ending balance [2],[4],[7],[35]   $ (7)
Interest [2],[4],[7],[35]   5.50%
Interest [2],[4],[7],[35]   10.90%
Investment, Identifier [Axis]: HomeX Services Group LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (3)  
Interest [5],[28],[29],[30] 4.50%  
Interest [5],[28],[29],[30] 9.10%  
Investment, Identifier [Axis]: Honour Lane Logistics Holdings Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31],[33] $ 6,645  
Interest [28],[29],[31],[33] 5.00%  
Interest [28],[29],[31],[33] 10.30%  
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 [2],[3],[4],[35] $ 6,160  
Fair value at ending balance [2],[3],[4],[35]   $ 6,160
Interest [2],[3],[4],[35]   5.00%
Interest [2],[3],[4],[35]   10.50%
Investment, Identifier [Axis]: Hydratech Holdings, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 7,413  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.60%  
Investment, Identifier [Axis]: Hydratech Holdings, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 265  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.60%  
Investment, Identifier [Axis]: Hygie 31 Holding, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 1,502  
Interest [28],[29],[33],[42] 5.63%  
Interest [28],[29],[33],[42] 8.80%  
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 [2],[3],[4],[45] $ 1,739  
Fair value at ending balance [2],[3],[4],[45]   $ 1,739
Interest [2],[3],[4],[45]   6.25%
Interest [2],[3],[4],[45]   10.40%
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [27] 2,013 $ 4,496
Gross Additions 0 [12],[18] 0 [13],[27]
Gross Reductions (1,040) [14],[18] 0 [15],[27]
Amount of Realized Gain (Loss) (4,179) [18] 0 [27]
Amount of Unrealized Gain (Loss) 3,206 [18] (2,483) [27]
Fair value at ending balance 0 [18] 2,013 [27]
Amount of Interest or Dividends Credited to Income $ 0 [16],[18] $ 0 [17],[27]
Investment owned, balance (in shares) 102,144 [18] 102,144 [27]
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 [4],[11] $ 2,013  
Fair value at ending balance [4],[11]   $ 2,013
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   102,144
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Construction & Building, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] 3,917  
Fair value at ending balance [1],[2],[4]   $ 3,917
Interest [1],[2],[4]   8.00%
Interest [1],[2],[4]   13.40%
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 [27] 4,519 [1],[2],[4] $ 4,098
Gross Additions [13],[27]   421
Gross Reductions [15],[27]   0
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   0
Fair value at ending balance [1],[2],[4],[27]   4,519
Amount of Interest or Dividends Credited to Income [17],[27]   $ 665
Interest [1],[2],[4],[27]   3.00%
Interest [1],[2],[4],[27]   8.50%
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] 3,917  
Gross Additions [12],[18] 172  
Gross Reductions [14],[18] (3,917)  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] (172)  
Fair value at ending balance [18] 0 $ 3,917
Amount of Interest or Dividends Credited to Income [16],[18] $ 311  
Interest [18] 8.00%  
Interest [18] 13.40%  
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 [27] $ 3,917 3,917
Gross Additions [13],[27]   75
Gross Reductions [15],[27]   0
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   (75)
Fair value at ending balance [27]   3,917
Amount of Interest or Dividends Credited to Income [17],[27]   $ 592
Interest [27]   8.00%
Interest [27]   13.40%
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] 4,519  
Gross Additions [12],[18] 161  
Gross Reductions [14],[18] (4,680)  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] 0  
Fair value at ending balance [18] 0 $ 4,519
Amount of Interest or Dividends Credited to Income [16],[18] $ 181  
Interest [18] 3.00%  
Interest [18] 8.50%  
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 [2],[3],[4],[37] $ 2,713  
Fair value at ending balance [2],[3],[4],[37]   $ 2,713
Interest [2],[3],[4],[37]   5.50%
Interest [2],[3],[4],[37]   9.50%
Investment, Identifier [Axis]: IM Square, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 2,533  
Interest [28],[29],[33],[38] 5.50%  
Interest [28],[29],[33],[38] 8.80%  
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 [2],[3],[4],[7],[37] $ 5,711  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 5,711
Interest [2],[3],[4],[7],[37]   5.37%
Interest [2],[3],[4],[7],[37]   9.30%
Investment, Identifier [Axis]: ISTO Technologies II, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31] $ 6,706  
Interest [28],[29],[31] 5.00%  
Interest [28],[29],[31] 9.60%  
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 [1],[2],[4] $ 6,616  
Fair value at ending balance [1],[2],[4]   $ 6,616
Interest [1],[2],[4]   6.25%
Interest [1],[2],[4]   11.60%
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 [1],[2],[4],[7] (18)  
Fair value at ending balance [1],[2],[4],[7]   $ (18)
Interest [1],[2],[4],[7]   6.25%
Interest [1],[2],[4],[7]   11.60%
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31] $ (2)  
Interest [5],[28],[29],[31] 5.00%  
Interest [5],[28],[29],[31] 9.60%  
Investment, Identifier [Axis]: ITI Intermodal, Inc., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 915  
Investment owned, balance (in shares) [29],[34] 7,500.4  
Investment, Identifier [Axis]: ITI Intermodal, Inc., First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31] $ 800  
Interest [28],[29],[31] 6.25%  
Interest [28],[29],[31] 10.60%  
Investment, Identifier [Axis]: ITI Intermodal, Inc., First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31] $ 12,079  
Interest [28],[29],[31] 6.50%  
Interest [28],[29],[31] 10.80%  
Investment, Identifier [Axis]: ITI Intermodal, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31] $ 225  
Interest [5],[28],[29],[31] 6.50%  
Interest [5],[28],[29],[31] 10.80%  
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 [4],[11] $ 715  
Fair value at ending balance [4],[11]   $ 715
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   7,500.4
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 [1],[2],[4] 12,757  
Fair value at ending balance [1],[2],[4]   $ 12,757
Interest [1],[2],[4]   6.50%
Interest [1],[2],[4]   12.00%
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 [1],[2],[4],[7] 67  
Fair value at ending balance [1],[2],[4],[7]   $ 67
Interest [1],[2],[4],[7]   6.50%
Interest [1],[2],[4],[7]   12.00%
Investment, Identifier [Axis]: Ice House America, L.L.C., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 4,482  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.10%  
Investment, Identifier [Axis]: Ice House America, L.L.C., LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 316  
Investment owned, balance (in shares) [29],[34] 2,833  
Investment, Identifier [Axis]: Ice House America, L.L.C., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 186  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.10%  
Investment, Identifier [Axis]: Infoniqa Holdings GmbH, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 2,721  
Interest [28],[29],[33],[42] 4.75%  
Interest [28],[29],[33],[42] 8.10%  
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 [2],[3],[4],[45] $ 2,879  
Fair value at ending balance [2],[3],[4],[45]   $ 2,879
Interest [2],[3],[4],[45]   4.75%
Interest [2],[3],[4],[45]   8.70%
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 [2],[3],[4],[7],[45] 6,203  
Fair value at ending balance [2],[3],[4],[7],[45]   $ 6,203
Interest [2],[3],[4],[7],[45]   5.75%
Interest [2],[3],[4],[7],[45]   9.60%
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 [2],[3],[4],[65] 1,035  
Fair value at ending balance [2],[3],[4],[65]   $ 1,035
Interest [2],[3],[4],[65]   5.75%
Interest [2],[3],[4],[65]   7.50%
Investment, Identifier [Axis]: Innovad Group II BV, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 6,383  
Interest [28],[29],[33],[42] 5.00%  
Interest [28],[29],[33],[42] 8.70%  
Investment, Identifier [Axis]: Innovad Group II BV, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[66] $ 1,012  
Interest [28],[29],[33],[66] 5.00%  
Interest [28],[29],[33],[66] 6.00%  
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 [2],[10],[54] $ 2,469  
Fair value at ending balance [2],[10],[54]   $ 2,469
Interest [2],[10],[54]   4.25%
Interest [2],[10],[54]   9.90%
Investment, Identifier [Axis]: Innovative XCessories & Services, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[30],[36] $ 2,746  
Interest [28],[30],[36] 4.25%  
Interest [28],[30],[36] 9.00%  
Investment, Identifier [Axis]: Interstellar Group B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 1,509  
Interest [5],[28],[29],[33],[38] 6.00%  
Interest [5],[28],[29],[33],[38] 9.60%  
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 [2],[3],[4],[7],[37] $ 1,676  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 1,676
Interest [2],[3],[4],[7],[37]   5.50%
Interest [2],[3],[4],[7],[37]   9.40%
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 [2],[3],[4],[7],[63] 2,051  
Fair value at ending balance [2],[3],[4],[7],[63]   $ 2,051
Interest [2],[3],[4],[7],[63]   6.25%
Interest [2],[3],[4],[7],[63]   10.70%
Investment, Identifier [Axis]: InvoCare Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[48] $ 1,963  
Interest [5],[28],[29],[33],[48] 6.25%  
Interest [5],[28],[29],[33],[48] 10.70%  
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 [2],[10],[35] $ 2,622  
Fair value at ending balance [2],[10],[35]   $ 2,622
Interest [2],[10],[35]   7.50%
Interest [2],[10],[35]   13.00%
Investment, Identifier [Axis]: Isagenix International, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34],[36] $ 0  
Investment owned, balance (in shares) [29],[34],[36] 58,538  
Investment, Identifier [Axis]: Isagenix International, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[36] $ 160  
Interest [28],[29],[30],[36] 6.50%  
Interest [28],[29],[30],[36] 11.20%  
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 [4],[11] $ 0  
Fair value at ending balance [4],[11]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   58,538
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 [1],[2],[10] 718  
Fair value at ending balance [1],[2],[10]   $ 718
Interest [1],[2],[10]   5.60%
Interest [1],[2],[10]   10.60%
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 5,075  
Interest [28],[29],[33],[38] 6.00%  
Interest [28],[29],[33],[38] 9.20%  
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 [2],[3],[4],[7],[37] $ 4,778  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 4,778
Interest [2],[3],[4],[7],[37]   6.50%
Interest [2],[3],[4],[7],[37]   10.50%
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 [1],[2],[10] 4,800  
Fair value at ending balance [1],[2],[10]   $ 4,800
Interest [1],[2],[10]   7.25%
Interest [1],[2],[10]   12.90%
Investment, Identifier [Axis]: Ivanti Software, Inc., Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[30],[36] $ 3,285  
Interest [28],[30],[36] 7.25%  
Interest [28],[30],[36] 12.10%  
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 [1],[2],[4] $ 3,598  
Fair value at ending balance [1],[2],[4]   $ 3,598
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   11.00%
Investment, Identifier [Axis]: JF Acquisition, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 3,736  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.20%  
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 [2],[3],[4],[45] $ 1,176  
Fair value at ending balance [2],[3],[4],[45]   $ 1,176
Interest [2],[3],[4],[45]   5.25%
Interest [2],[3],[4],[45]   9.30%
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[54] 6,648  
Fair value at ending balance [2],[3],[4],[54]   $ 6,648
Interest [2],[3],[4],[54]   5.25%
Interest [2],[3],[4],[54]   10.60%
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 1,112  
Interest [28],[29],[33],[42] 5.25%  
Interest [28],[29],[33],[42] 7.90%  
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31],[33] $ 6,579  
Interest [28],[29],[31],[33] 5.25%  
Interest [28],[29],[31],[33] 9.80%  
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   $ 3,026
Interest   8.00%
Investment, Identifier [Axis]: JetBlue 2019-1 Class B Pass Through Trust, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance $ 2,520  
Interest 8.00%  
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[33],[67] $ 40,761  
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 [3],[7] 41,053  
Fair value at ending balance [3],[7]   $ 41,053
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 41,053 40,088
Gross Additions 0 [12] 0 [13]
Gross Reductions 0 [14] 0 [15]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (292) 965
Fair value at ending balance 40,761 41,053
Amount of Interest or Dividends Credited to Income 5,709 [16] 5,709 [17]
Investment, Identifier [Axis]: Jon Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[62] $ 3,720  
Interest [5],[28],[29],[33],[62] 4.50%  
Interest [5],[28],[29],[33],[62] 9.50%  
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 [2],[3],[4],[7],[64] $ 3,844  
Fair value at ending balance [2],[3],[4],[7],[64]   $ 3,844
Interest [2],[3],[4],[7],[64]   4.50%
Interest [2],[3],[4],[7],[64]   10.20%
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] 3,414  
Fair value at ending balance [1],[2],[4]   $ 3,414
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   11.00%
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 [4] 228  
Fair value at ending balance [4]   $ 228
Investment owned, balance (in shares) [4]   1,018
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 [1],[2],[4],[7] (8)  
Fair value at ending balance [1],[2],[4],[7]   $ (8)
Interest [1],[2],[4],[7]   5.50%
Interest [1],[2],[4],[7]   11.00%
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 3,481  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.00%  
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 372  
Investment owned, balance (in shares) [29] 1,018  
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.00%  
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 [1],[2],[4],[7] $ 5,545  
Fair value at ending balance [1],[2],[4],[7]   $ 5,545
Interest [1],[2],[4],[7]   5.00%
Interest [1],[2],[4],[7]   10.50%
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 [4],[11] 224  
Fair value at ending balance [4],[11]   $ 224
Investment owned, balance (in shares) [4],[11]   203.2
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [27] 0 $ 1,181
Gross Additions [13],[27]   0
Gross Reductions [15],[27]   (2,300)
Amount of Realized Gain (Loss) [27]   711
Amount of Unrealized Gain (Loss) [27]   408
Fair value at ending balance [27]   0
Amount of Interest or Dividends Credited to Income [17],[27]   $ 0
Investment owned, balance (in shares) [27]   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 [27] 0 $ 1,565
Gross Additions [13],[27]   237
Gross Reductions [15],[27]   (1,802)
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   0
Fair value at ending balance [27]   0
Amount of Interest or Dividends Credited to Income [17],[27]   $ 156
Investment, interest rate, paid in kind [27]   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 [1],[2],[4] 7,031  
Fair value at ending balance [1],[2],[4]   $ 7,031
Interest [1],[2],[4]   4.25%
Interest [1],[2],[4]   9.70%
Investment, Identifier [Axis]: Keystone Bidco B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 677  
Interest [5],[28],[29],[33],[38] 5.25%  
Interest [5],[28],[29],[33],[38] 8.10%  
Investment, Identifier [Axis]: Keystone Bidco B.V., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 18  
Interest [5],[28],[29],[33],[38] 5.25%  
Interest [5],[28],[29],[33],[38] 8.10%  
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 13,156  
Interest [28],[29],[30] 4.75%  
Interest [28],[29],[30] 9.50%  
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 772  
Investment owned, balance (in shares) [29],[34] 637,677.11  
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 [1],[2],[4] $ 9,116  
Fair value at ending balance [1],[2],[4]   $ 9,116
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   10.80%
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 [4],[11] 599  
Fair value at ending balance [4],[11]   $ 599
Investment owned, balance (in shares) [4],[11]   637,677.11
Investment, Identifier [Axis]: Kona Buyer, LLC, High Tech Industries, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] 8,413  
Fair value at ending balance [1],[2],[4]   $ 8,413
Interest [1],[2],[4]   4.75%
Interest [1],[2],[4]   10.10%
Investment, Identifier [Axis]: Lambir Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[42] $ 1,952  
Interest [5],[28],[29],[33],[42] 6.00%  
Interest [5],[28],[29],[33],[42] 8.70%  
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 [2],[3],[4],[7],[37] $ 1,854  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 1,854
Interest [2],[3],[4],[7],[37]   6.25%
Interest [2],[3],[4],[7],[37]   10.40%
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 [3],[4] 1,587  
Fair value at ending balance [3],[4]   $ 1,587
Investment, interest rate, paid in kind [3],[4]   12.00%
Investment, Identifier [Axis]: Lambir Bidco Limited, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 1,721  
Investment, interest rate, paid in kind [29],[33] 12.00%  
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31],[33] $ 687  
Interest [5],[28],[29],[31],[33] 5.75%  
Interest [5],[28],[29],[31],[33] 10.60%  
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31],[33] $ (1)  
Interest [5],[28],[29],[31],[33] 5.75%  
Interest [5],[28],[29],[31],[33] 10.60%  
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 [2],[3],[4],[7],[54] $ 659  
Fair value at ending balance [2],[3],[4],[7],[54]   $ 659
Interest [2],[3],[4],[7],[54]   5.75%
Interest [2],[3],[4],[7],[54]   11.10%
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 [2],[3],[4],[7],[54] 16  
Fair value at ending balance [2],[3],[4],[7],[54]   $ 16
Interest [2],[3],[4],[7],[54]   5.75%
Interest [2],[3],[4],[7],[54]   11.10%
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 [1],[2],[4] 10,096  
Fair value at ending balance [1],[2],[4]   $ 10,096
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.20%
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 [4] 239  
Fair value at ending balance [4]   $ 239
Investment owned, balance (in shares) [4]   81,739
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 [1],[2],[4] 400  
Fair value at ending balance [1],[2],[4]   $ 400
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.20%
Investment, Identifier [Axis]: LeadsOnline, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 10,029  
Interest [28],[29],[30] 4.75%  
Interest [28],[29],[30] 9.40%  
Investment, Identifier [Axis]: LeadsOnline, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 180  
Investment owned, balance (in shares) [29] 81,739  
Investment, Identifier [Axis]: LeadsOnline, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (10)  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.40%  
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 [2],[35] $ 5,311  
Fair value at ending balance [2],[35]   $ 5,311
Interest [2],[35]   5.50%
Interest [2],[35]   10.90%
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 [4],[11] 4,037  
Fair value at ending balance [4],[11]   $ 4,037
Investment owned, balance (in shares) [4],[11]   94,441
Investment, Identifier [Axis]: Learfield Communications, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 4,085  
Investment owned, balance (in shares) [29],[34] 55,198  
Investment, Identifier [Axis]: Learfield Communications, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[41] $ 5,520  
Interest [28],[41] 5.00%  
Interest [28],[41] 9.60%  
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 [4],[43],[68] $ 0  
Fair value at ending balance [4],[43],[68]   $ 0
Investment, interest rate, paid in kind [4],[43],[68]   16.00%
Investment, Identifier [Axis]: Legal Solutions Holdings, Senior Subordinated Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[56],[69] $ 0  
Interest [29],[56],[69] 6.00%  
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 [1],[2],[4],[10] $ 2,675  
Fair value at ending balance [1],[2],[4],[10]   $ 2,675
Interest [1],[2],[4],[10]   7.00%
Interest [1],[2],[4],[10]   12.70%
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Consumer Goods: Durable, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7],[10] (275)  
Fair value at ending balance [1],[2],[4],[7],[10]   $ (275)
Interest [1],[2],[4],[7],[10]   7.00%
Interest [1],[2],[4],[7],[10]   12.70%
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[36] $ 2,812  
Interest [28],[29],[30],[36] 7.00%  
Interest [28],[29],[30],[36] 11.90%  
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 [1],[2],[4] $ 860  
Fair value at ending balance [1],[2],[4]   $ 860
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   10.60%
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 [2],[10],[35] 1,274  
Fair value at ending balance [2],[10],[35]   $ 1,274
Interest [2],[10],[35]   4.75%
Interest [2],[10],[35]   10.30%
Investment, Identifier [Axis]: Long Term Care Group, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 7,839  
Interest [28],[29],[30] 3.27%  
Interest [28],[29],[30] 8.10%  
Investment, interest rate, paid in kind [28],[29],[30] 3.70%  
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 [2],[4],[35] $ 6,308  
Fair value at ending balance [2],[4],[35]   $ 6,308
Interest [2],[4],[35]   1.00%
Interest [2],[4],[35]   6.30%
Investment, interest rate, paid in kind [2],[4],[35]   6.00%
Investment, Identifier [Axis]: M-Personal Protection Management GMBH (f.k.a INOS 19-090 GmbH), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 10,829  
Interest [28],[29],[33],[38] 5.38%  
Interest [28],[29],[33],[38] 8.10%  
Investment, Identifier [Axis]: MB Purchaser, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 2,591  
Interest [5],[28],[29],[41] 4.75%  
Interest [5],[28],[29],[41] 9.40%  
Investment, Identifier [Axis]: MB Purchaser, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 82  
Investment owned, balance (in shares) [29],[34] 66  
Investment, Identifier [Axis]: MB Purchaser, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ (2)  
Interest [5],[28],[29],[41] 4.75%  
Interest [5],[28],[29],[41] 9.40%  
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 [1],[2],[4],[7] $ 4,133  
Fair value at ending balance [1],[2],[4],[7]   $ 4,133
Interest [1],[2],[4],[7]   5.50%
Interest [1],[2],[4],[7]   11.00%
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 778  
Fair value at ending balance   $ 778
Investment owned, balance (in shares) [6],[8],[9]   746.66
Investment, Identifier [Axis]: MC Group Ventures Corporation, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 4,899  
Interest [5],[28],[29],[41] 5.25%  
Interest [5],[28],[29],[41] 9.90%  
Investment, Identifier [Axis]: MC Group Ventures Corporation, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31] $ 4,036  
Interest [5],[28],[29],[31] 5.50%  
Interest [5],[28],[29],[31] 10.20%  
Investment, Identifier [Axis]: MC Group Ventures Corporation, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 681  
Investment owned, balance (in shares) [29],[34] 746.66  
Investment, Identifier [Axis]: MI OpCo Holdings, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[41] $ 6,320  
Interest [28],[41] 7.25%  
Interest [28],[41] 11.80%  
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 [2],[4],[35] $ 901  
Fair value at ending balance [2],[4],[35]   $ 901
Interest [2],[4],[35]   5.50%
Interest [2],[4],[35]   11.00%
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 [4],[11] 82  
Fair value at ending balance [4],[11]   $ 82
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   76,923
Investment, Identifier [Axis]: MNS Buyer, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 662  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.50%  
Investment, Identifier [Axis]: MNS Buyer, Inc., Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 106  
Investment owned, balance (in shares) [29],[34] 76,923  
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 [26] $ 9,762 $ 7,149
Gross Additions [20],[26]   2,613
Gross Reductions [22],[26]   0
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   0
Fair value at ending balance [26]   9,762
Amount of Interest or Dividends Credited to Income [24],[26]   $ 587
Interest [26]   4.50%
Investment, interest rate, paid in kind [26]   1.50%
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 [25] 9,762  
Gross Additions [19],[25] 720  
Gross Reductions [21],[25] (9,620)  
Amount of Realized Gain (Loss) [25] (862)  
Amount of Unrealized Gain (Loss) [25] 0  
Fair value at ending balance [25] 0 $ 9,762
Amount of Interest or Dividends Credited to Income [23],[25] $ 495  
Interest [25] 4.50%  
Investment, interest rate, paid in kind [25] 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 [26] $ 15,430 9,675
Gross Additions [20],[26]   0
Gross Reductions [22],[26]   0
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   5,755
Fair value at ending balance $ 13,741 [29],[33],[34],[69] 15,430 [26]
Amount of Interest or Dividends Credited to Income [24],[26]   $ 0
Investment owned, balance (in shares) 18,000 [29],[33],[34],[69] 18,000 [26]
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 [25] $ 15,430  
Gross Additions [19],[25] 9,620  
Gross Reductions [21],[25] 0  
Amount of Realized Gain (Loss) [25] 0  
Amount of Unrealized Gain (Loss) [25] (11,309)  
Fair value at ending balance [25] 13,741 $ 15,430
Amount of Interest or Dividends Credited to Income [23],[25] $ 0  
Investment owned, balance (in shares) [25] 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 [3],[4],[68] $ 9,762  
Fair value at ending balance [3],[4],[68]   $ 9,762
Interest [3],[4],[68]   4.50%
Investment, interest rate, paid in kind [3],[4],[68]   1.50%
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive, Common Equity interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4],[11],[68] 15,430  
Fair value at ending balance [3],[4],[11],[68]   $ 15,430
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11],[68]   18,000
Investment, Identifier [Axis]: MVC Private Equity Fund LP, General Partnership Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 24 $ 45
Gross Additions [20]   0
Gross Reductions [22]   (24)
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   3
Fair value at ending balance   24
Amount of Interest or Dividends Credited to Income [24]   $ 95
Investment owned, balance (in shares)   1,831.4
Investment, Identifier [Axis]: MVC Private Equity Fund LP, General Partnership Interest 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [33],[34],[69] $ 0  
Investment owned, balance (in shares) [33],[34],[69] 1,831.4  
Investment, Identifier [Axis]: MVC Private Equity Fund LP, General Partnership Interest 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 24  
Gross Additions [19] 0  
Gross Reductions [21] (17)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (7)  
Fair value at ending balance 0 $ 24
Amount of Interest or Dividends Credited to Income [23] $ 48  
Investment owned, balance (in shares) 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 [3],[11],[68] $ 24  
Fair value at ending balance [3],[11],[68]   $ 24
Investment owned, balance (in shares) [3],[6],[8],[9],[11],[68]   1,831.4
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Investment Funds & Vehicles, Limited Partnership Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[11],[68] 981  
Fair value at ending balance [3],[11],[68]   $ 981
Investment owned, balance (in shares) [3],[6],[8],[9],[11],[68]   71,790.4
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Limited Partnership Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 981 $ 1,793
Gross Additions [20]   0
Gross Reductions [22]   (940)
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   128
Fair value at ending balance   981
Amount of Interest or Dividends Credited to Income [24]   $ 0
Investment owned, balance (in shares)   71,790.4
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Limited Partnership Interest 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [33],[34],[69] 11  
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Limited Partnership Interest 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 981  
Gross Additions [19] 0  
Gross Reductions [21] (678)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (292)  
Fair value at ending balance 11 $ 981
Amount of Interest or Dividends Credited to Income [23] $ 0  
Investment owned, balance (in shares) 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 [1],[3],[10] $ 5,067  
Fair value at ending balance [1],[3],[10]   $ 5,067
Interest [1],[3],[10]   9.03%
Interest [1],[3],[10]   14.40%
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 [3],[10] 8,181  
Fair value at ending balance [3],[10]   $ 8,181
Investment, Identifier [Axis]: Magnetite XIX, Limited, Subordinated Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[30],[33],[36] $ 10,500  
Interest [29],[30],[33],[36] 9.03%  
Interest [29],[30],[33],[36] 13.70%  
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 [2],[3],[4],[7],[37] $ 1,777  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 1,777
Interest [2],[3],[4],[7],[37]   6.75%
Interest [2],[3],[4],[7],[37]   3.90%
Investment, interest rate, paid in kind [2],[3],[4],[7],[37]   6.80%
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 [2],[3],[4],[7],[37] 6  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 6
Interest [2],[3],[4],[7],[37]   5.75%
Interest [2],[3],[4],[7],[37]   3.90%
Investment, interest rate, paid in kind [2],[3],[4],[7],[37]   5.80%
Investment, Identifier [Axis]: Marmoutier Holding B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[42],[56] $ 146  
Interest [5],[28],[29],[33],[42],[56] 6.50%  
Interest [5],[28],[29],[33],[42],[56] 10.40%  
Investment, Identifier [Axis]: Marmoutier Holding B.V., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[42],[56] $ (53)  
Interest [5],[28],[29],[33],[42],[56] 5.75%  
Interest [5],[28],[29],[33],[42],[56] 6.70%  
Investment, Identifier [Axis]: Marmoutier Holding B.V., Super Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[56] $ 185  
Investment, interest rate, paid in kind [28],[29],[33],[56] 6.00%  
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 [1],[2],[4] $ 10,462  
Fair value at ending balance [1],[2],[4]   $ 10,462
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   11.00%
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 [1],[2],[4],[7] 1,914  
Fair value at ending balance [1],[2],[4],[7]   $ 1,914
Interest [1],[2],[4],[7]   5.50%
Interest [1],[2],[4],[7]   11.00%
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 [1],[2],[4] 2,764  
Fair value at ending balance [1],[2],[4]   $ 2,764
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.60%
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 [2],[4],[39] 3,946  
Fair value at ending balance [2],[4],[39]   $ 3,946
Interest [2],[4],[39]   6.00%
Interest [2],[4],[39]   11.20%
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 1,747  
Interest [28],[29],[30] 4.75%  
Interest [28],[29],[30] 9.50%  
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[59] $ 3,775  
Interest [28],[29],[59] 4.75%  
Interest [28],[29],[59] 9.60%  
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Revolver 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (9)  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.50%  
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Revolver 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[59] $ (10)  
Interest [5],[28],[29],[59] 4.75%  
Interest [5],[28],[29],[59] 9.60%  
Investment, Identifier [Axis]: Median B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[33],[46] $ 8,966  
Interest [28],[33],[46] 5.93%  
Interest [28],[33],[46] 11.00%  
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 [2],[3],[47] $ 8,595  
Fair value at ending balance [2],[3],[47]   $ 8,595
Interest [2],[3],[47]   6.00%
Interest [2],[3],[47]   11.40%
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc., Healthcare, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2] 3,708  
Fair value at ending balance [1],[2]   $ 3,708
Interest [1],[2]   7.00%
Interest [1],[2]   12.50%
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc., Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[30] $ 2,211  
Interest [28],[30] 7.00%  
Interest [28],[30] 11.70%  
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 0  
Investment owned, balance (in shares) [29],[34] 205  
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 3,648  
Interest [28],[29],[30] 5.25%  
Interest [28],[29],[30] 9.70%  
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 46  
Investment owned, balance (in shares) [29],[34] 1,842  
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 108  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 9.70%  
Investment, Identifier [Axis]: Mercell Holding AS, Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 125  
Investment owned, balance (in shares) [29],[33],[34] 114.4  
Investment, interest rate, paid in kind 9.00%  
Investment, Identifier [Axis]: Mercell Holding AS, Class B Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 21  
Investment owned, balance (in shares) [29],[33],[34] 28,943.8  
Investment, Identifier [Axis]: Mercell Holding AS, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[70] $ 2,750  
Interest [5],[28],[29],[33],[70] 5.50%  
Interest [5],[28],[29],[33],[70] 10.10%  
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 [3],[4],[11] $ 128  
Fair value at ending balance [3],[4],[11]   $ 128
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   114.4
Investment, interest rate, paid in kind [3],[4],[11]   9.00%
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 [3],[4],[11] 51  
Fair value at ending balance [3],[4],[11]   $ 51
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   28,943.8
Investment, Identifier [Axis]: Mercell Holding AS, Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[7],[71] 3,041  
Fair value at ending balance [2],[3],[4],[7],[71]   $ 3,041
Interest [2],[3],[4],[7],[71]   5.50%
Interest [2],[3],[4],[7],[71]   10.10%
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[72] $ 7,008  
Interest [5],[28],[29],[33],[72] 6.00%  
Interest [5],[28],[29],[33],[72] 10.40%  
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 [2],[3],[4],[7],[49] $ 7,784  
Fair value at ending balance [2],[3],[4],[7],[49]   $ 7,784
Interest [2],[3],[4],[7],[49]   5.50%
Interest [2],[3],[4],[7],[49]   10.30%
Investment, Identifier [Axis]: Moonlight Bidco Limited, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 182  
Investment owned, balance (in shares) [29],[33],[34] 10,590  
Investment, Identifier [Axis]: Moonlight Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[44] $ 1,841  
Interest [5],[28],[29],[33],[44] 5.75%  
Interest [5],[28],[29],[33],[44] 10.70%  
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 [3],[4],[11] $ 1,380  
Fair value at ending balance [3],[4],[11]   $ 1,380
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   107,714
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 [2],[3],[4],[7],[39] 1,832  
Fair value at ending balance [2],[3],[4],[7],[39]   $ 1,832
Interest [2],[3],[4],[7],[39]   6.25%
Interest [2],[3],[4],[7],[39]   11.60%
Investment, Identifier [Axis]: Murphy Midco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46] $ 1,641  
Interest [28],[29],[33],[46] 5.25%  
Interest [28],[29],[33],[46] 10.20%  
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 [2],[3],[4],[47] $ 1,670  
Fair value at ending balance [2],[3],[4],[47]   $ 1,670
Interest [2],[3],[4],[47]   5.25%
Interest [2],[3],[4],[47]   10.70%
Investment, Identifier [Axis]: Music Reports, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 6,618  
Interest [28],[29],[30] 6.25%  
Interest [28],[29],[30] 10.70%  
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 [1],[2],[4] $ 6,884  
Fair value at ending balance [1],[2],[4]   $ 6,884
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.50%
Investment, Identifier [Axis]: NAW Buyer LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 11,850  
Interest [5],[28],[29],[30] 5.75%  
Interest [5],[28],[29],[30] 10.40%  
Investment, Identifier [Axis]: NAW Buyer LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 524  
Investment owned, balance (in shares) [29] 472,512  
Investment, Identifier [Axis]: NAW Buyer LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 5.75%  
Interest [5],[28],[29],[30] 10.40%  
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 [4],[11] $ 473  
Fair value at ending balance [4],[11]   $ 473
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   472,512
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 [1],[2],[4],[7] 11,446  
Fair value at ending balance [1],[2],[4],[7]   $ 11,446
Interest [1],[2],[4],[7]   5.75%
Interest [1],[2],[4],[7]   11.10%
Investment, Identifier [Axis]: NAW Buyer LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 335  
Fair value at ending balance [1],[2],[4],[7]   $ 335
Interest [1],[2],[4],[7]   5.75%
Interest [1],[2],[4],[7]   11.10%
Investment, Identifier [Axis]: NF Holdco, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 6,283  
Interest [28],[29],[30] 6.50%  
Interest [28],[29],[30] 10.80%  
Investment, Identifier [Axis]: NF Holdco, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 563  
Investment owned, balance (in shares) [29],[34] 639,510  
Investment, Identifier [Axis]: NF Holdco, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 276  
Interest [5],[28],[29],[30] 6.50%  
Interest [5],[28],[29],[30] 10.80%  
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 [1],[2],[4] $ 6,204  
Fair value at ending balance [1],[2],[4]   $ 6,204
Interest [1],[2],[4]   6.50%
Interest [1],[2],[4]   11.80%
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 [4],[11] 633  
Fair value at ending balance [4],[11]   $ 633
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   639,510
Investment, Identifier [Axis]: NF Holdco, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 417  
Fair value at ending balance [1],[2],[4],[7]   $ 417
Interest [1],[2],[4],[7]   6.50%
Interest [1],[2],[4],[7]   11.80%
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 [2],[4],[35] 4,655  
Fair value at ending balance [2],[4],[35]   $ 4,655
Interest [2],[4],[35]   4.00%
Interest [2],[4],[35]   9.50%
Investment, Identifier [Axis]: NPM Investments 28 B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 1,869  
Interest [5],[28],[29],[33],[38] 6.00%  
Interest [5],[28],[29],[33],[38] 9.30%  
Investment, Identifier [Axis]: NPM Investments 28 B.V., Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[7],[37] $ 2,175  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 2,175
Interest [2],[3],[4],[7],[37]   6.00%
Interest [2],[3],[4],[7],[37]   9.90%
Investment, Identifier [Axis]: Napa Bidco Pty Ltd, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[48] $ 12,459  
Interest [28],[29],[33],[48] 5.00%  
Interest [28],[29],[33],[48] 9.50%  
Investment, Identifier [Axis]: Napa Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[63] $ 18,321  
Fair value at ending balance [2],[3],[4],[63]   $ 18,321
Interest [2],[3],[4],[63]   5.50%
Interest [2],[3],[4],[63]   9.90%
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 [4],[11] 535  
Fair value at ending balance [4],[11]   $ 535
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   4,587.38
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 [4],[11] 229  
Fair value at ending balance [4],[11]   $ 229
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   509.71
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 [1],[2],[4] 5,562  
Fair value at ending balance [1],[2],[4]   $ 5,562
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   10.50%
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 [1],[2],[4],[7] (8)  
Fair value at ending balance [1],[2],[4],[7]   $ (8)
Interest [1],[2],[4],[7]   5.00%
Interest [1],[2],[4],[7]   10.50%
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Class A Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 578  
Investment owned, balance (in shares) [29],[34] 4,587.38  
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Class B Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 743  
Investment owned, balance (in shares) [29],[34] 509.71  
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 5,074  
Interest [28],[29],[41] 4.75%  
Interest [28],[29],[41] 9.40%  
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 0  
Interest [5],[28],[29],[41] 4.75%  
Interest [5],[28],[29],[41] 9.40%  
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 5,572  
Interest [28],[29],[41] 4.50%  
Interest [28],[29],[41] 9.20%  
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 [2],[4],[35] $ 2,918  
Fair value at ending balance [2],[4],[35]   $ 2,918
Interest [2],[4],[35]   2.00%
Interest [2],[4],[35]   7.40%
Investment, interest rate, paid in kind [2],[4],[35]   3.00%
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 [2],[4],[35] 2,620  
Fair value at ending balance [2],[4],[35]   $ 2,620
Interest [2],[4],[35]   5.00%
Interest [2],[4],[35]   10.40%
Investment, Identifier [Axis]: NeoxCo, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 2,456  
Interest [28],[29],[33],[42] 6.50%  
Interest [28],[29],[33],[42] 10.10%  
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 [2],[3],[4],[7],[45] $ 2,090  
Fair value at ending balance [2],[3],[4],[7],[45]   $ 2,090
Interest [2],[3],[4],[7],[45]   6.50%
Interest [2],[3],[4],[7],[45]   10.50%
Investment, Identifier [Axis]: Next Holdco, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 7,320  
Interest [5],[28],[29],[30] 5.75%  
Interest [5],[28],[29],[30] 10.50%  
Investment, Identifier [Axis]: Next Holdco, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 5.75%  
Interest [5],[28],[29],[30] 10.50%  
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 [2],[4],[7],[35] $ 7,236  
Fair value at ending balance [2],[4],[7],[35]   $ 7,236
Interest [2],[4],[7],[35]   6.00%
Interest [2],[4],[7],[35]   11.30%
Investment, Identifier [Axis]: Next Holdco, LLC,Technology,Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[7],[35] (11)  
Fair value at ending balance [2],[4],[7],[35]   $ (11)
Interest [2],[4],[7],[35]   6.00%
Interest [2],[4],[7],[35]   11.30%
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 [1],[2],[4] 2,434  
Fair value at ending balance [1],[2],[4]   $ 2,434
Interest [1],[2],[4]   4.75%
Interest [1],[2],[4]   10.10%
Investment, Identifier [Axis]: Northstar Recycling, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 16,910  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.00%  
Investment, Identifier [Axis]: Northstar Recycling, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (44)  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.00%  
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 [2],[3],[4],[7],[54] $ 3,984  
Fair value at ending balance [2],[3],[4],[7],[54]   $ 3,984
Interest [2],[3],[4],[7],[54]   5.25%
Interest [2],[3],[4],[7],[54]   11.10%
Investment, Identifier [Axis]: OA Buyer, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 8,268  
Interest [28],[29],[41] 4.75%  
Interest [28],[29],[41] 9.30%  
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 [2],[4],[35] $ 5,485  
Fair value at ending balance [2],[4],[35]   $ 5,485
Interest [2],[4],[35]   5.50%
Interest [2],[4],[35]   10.90%
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 276  
Fair value at ending balance   $ 276
Investment owned, balance (in shares) [6],[8],[9]   210,920.11
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[7],[35] (12)  
Fair value at ending balance [2],[4],[7],[35]   $ (12)
Interest [2],[4],[7],[35]   5.50%
Interest [2],[4],[7],[35]   10.90%
Investment, Identifier [Axis]: OA Buyer, Inc., Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 783  
Investment owned, balance (in shares) [29] 210,920.11  
Investment, Identifier [Axis]: OA Buyer, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ (5)  
Interest [5],[28],[29],[41] 4.75%  
Interest [5],[28],[29],[41] 9.30%  
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 [1],[2],[4] $ 3,454  
Fair value at ending balance [1],[2],[4]   $ 3,454
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   10.50%
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 [1],[2],[4],[7] (47)  
Fair value at ending balance [1],[2],[4],[7]   $ (47)
Interest [1],[2],[4],[7]   5.00%
Interest [1],[2],[4],[7]   10.50%
Investment, Identifier [Axis]: OAC Holdings I Corp, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 3,539  
Interest [28],[29],[41] 5.00%  
Interest [28],[29],[41] 9.70%  
Investment, Identifier [Axis]: OAC Holdings I Corp, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 0  
Interest [5],[28],[29],[41] 5.00%  
Interest [5],[28],[29],[41] 9.70%  
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 [2],[3],[4],[37] $ 3,390  
Fair value at ending balance [2],[3],[4],[37]   $ 3,390
Interest [2],[3],[4],[37]   5.75%
Interest [2],[3],[4],[37]   9.70%
Investment, Identifier [Axis]: OG III B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 3,241  
Interest [28],[29],[33],[38] 5.50%  
Interest [28],[29],[33],[38] 8.90%  
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 [2],[3],[4],[37] $ 985  
Fair value at ending balance [2],[3],[4],[37]   $ 985
Interest [2],[3],[4],[37]   5.75%
Interest [2],[3],[4],[37]   9.70%
Investment, Identifier [Axis]: ORTEC INTERNATIONAL NEWCO B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 931  
Interest [28],[29],[33],[38] 5.75%  
Interest [28],[29],[33],[38] 8.50%  
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 13,901  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 9.80%  
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 151  
Investment owned, balance (in shares) [29] 173,749  
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 430  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 9.80%  
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 [1],[2],[4] $ 12,934  
Fair value at ending balance [1],[2],[4]   $ 12,934
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.50%
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 [1],[2],[4],[7] (107)  
Fair value at ending balance [1],[2],[4],[7]   $ (107)
Interest [1],[2],[4],[7]   6.00%
Interest [1],[2],[4],[7]   11.50%
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 [1],[2],[4],[7] (22)  
Fair value at ending balance [1],[2],[4],[7]   $ (22)
Interest [1],[2],[4],[7]   6.00%
Interest [1],[2],[4],[7]   11.50%
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] 174  
Fair value at ending balance [4]   $ 174
Investment owned, balance (in shares) [4],[6],[8],[9]   173,749
Investment, Identifier [Axis]: Ocelot Holdco LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 742  
Investment owned, balance (in shares) [29],[34] 186.67  
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 [4],[11] $ 0  
Fair value at ending balance [4],[11]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   186.67
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 [4] 2,085  
Fair value at ending balance [4]   $ 2,085
Investment owned, balance (in shares) [4],[6],[8],[9]   243.81
Investment, interest rate, paid in kind [4]   15.00%
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 [4] 549  
Fair value at ending balance [4]   $ 549
Interest [4]   10.00%
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 [4] 2,933  
Fair value at ending balance [4]   $ 2,933
Interest [4]   10.00%
Investment, Identifier [Axis]: Ocelot Holdco LLC, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 2,873  
Investment owned, balance (in shares) [29] 243.81  
Investment, interest rate, paid in kind 15.00%  
Investment, Identifier [Axis]: Ocelot Holdco LLC, Super Senior Takeback Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29] $ 549  
Interest [28],[29] 10.00%  
Investment, Identifier [Axis]: Ocelot Holdco LLC, Takeback Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29] $ 2,933  
Interest [28],[29] 10.00%  
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 [2],[3],[4],[35] $ 3,812  
Fair value at ending balance [2],[3],[4],[35]   $ 3,812
Interest [2],[3],[4],[35]   6.75%
Interest [2],[3],[4],[35]   12.10%
Investment, Identifier [Axis]: Ocular Therapeutix, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[41] $ 4,849  
Interest [28],[29],[33],[41] 6.75%  
Interest [28],[29],[33],[41] 11.20%  
Investment, Identifier [Axis]: Offen Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[36],[41] $ 3,681  
Interest [29],[36],[41] 5.00%  
Interest [29],[36],[41] 9.70%  
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 [4],[10],[54] $ 3,691  
Fair value at ending balance [4],[10],[54]   $ 3,691
Interest [4],[10],[54]   5.00%
Interest [4],[10],[54]   10.50%
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 [1],[2],[4] 7,864  
Fair value at ending balance [1],[2],[4]   $ 7,864
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   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 [2],[3],[4],[54] 2,249  
Fair value at ending balance [2],[3],[4],[54]   $ 2,249
Interest [2],[3],[4],[54]   4.75%
Interest [2],[3],[4],[54]   10.20%
Investment, Identifier [Axis]: Oracle Vision Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46] $ 2,802  
Interest [28],[29],[33],[46] 5.25%  
Interest [28],[29],[33],[46] 10.00%  
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 [2],[3],[4],[47] $ 2,918  
Fair value at ending balance [2],[3],[4],[47]   $ 2,918
Interest [2],[3],[4],[47]   4.75%
Interest [2],[3],[4],[47]   9.90%
Investment, Identifier [Axis]: Origin Bidco Limited, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 301  
Interest [28],[29],[33],[38] 5.25%  
Interest [28],[29],[33],[38] 8.10%  
Investment, Identifier [Axis]: Origin Bidco Limited, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 522  
Interest [28],[29],[30],[33] 5.25%  
Interest [28],[29],[30],[33] 10.00%  
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 [2],[3],[4],[37] $ 326  
Fair value at ending balance [2],[3],[4],[37]   $ 326
Interest [2],[3],[4],[37]   5.25%
Interest [2],[3],[4],[37]   9.20%
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 [1],[2],[3],[4] 531  
Fair value at ending balance [1],[2],[3],[4]   $ 531
Interest [1],[2],[3],[4]   5.25%
Interest [1],[2],[3],[4]   10.70%
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 [4] 44  
Fair value at ending balance [4]   $ 44
Investment owned, balance (in shares) [4],[6],[8],[9]   28.8
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 [1],[2],[4],[7] 10,319  
Fair value at ending balance [1],[2],[4],[7]   $ 10,319
Interest [1],[2],[4],[7]   5.21%
Interest [1],[2],[4],[7]   10.70%
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 [1],[2],[4],[7] 2,930  
Fair value at ending balance [1],[2],[4],[7]   $ 2,930
Interest [1],[2],[4],[7]   5.75%
Interest [1],[2],[4],[7]   11.20%
Investment, Identifier [Axis]: PDQ.Com Corporation, Class A-2 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 42  
Investment owned, balance (in shares) [29],[34] 28.8  
Investment, Identifier [Axis]: PDQ.Com Corporation, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 14,514  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.30%  
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 844  
Interest [5],[28],[29],[33],[38] 5.75%  
Interest [5],[28],[29],[33],[38] 8.80%  
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 1,408  
Interest [28],[29],[30],[33] 5.75%  
Interest [28],[29],[30],[33] 10.50%  
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 [2],[3],[4],[7],[73] $ 820  
Fair value at ending balance [2],[3],[4],[7],[73]   $ 820
Interest [2],[3],[4],[7],[73]   6.00%
Interest [2],[3],[4],[7],[73]   9.90%
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 [2],[3],[4],[35] 1,305  
Fair value at ending balance [2],[3],[4],[35]   $ 1,305
Interest [2],[3],[4],[35]   6.00%
Interest [2],[3],[4],[35]   11.40%
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 [4] 4,224  
Fair value at ending balance [4]   $ 4,224
Interest [4]   6.90%
Investment, Identifier [Axis]: Panoche Energy Center LLC, First Lien Senior Secured Bond    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 3,695  
Interest [29] 6.90%  
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 2,688  
Interest [28],[29],[33],[42] 5.25%  
Interest [28],[29],[33],[42] 9.00%  
Investment, interest rate, paid in kind [28],[29],[33],[42] 0.80%  
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 1,500  
Interest [28],[29],[30],[33] 5.25%  
Interest [28],[29],[30],[33] 9.90%  
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 [2],[3],[4],[45] $ 2,804  
Fair value at ending balance [2],[3],[4],[45]   $ 2,804
Interest [2],[3],[4],[45]   5.25%
Interest [2],[3],[4],[45]   9.20%
Investment, interest rate, paid in kind [2],[3],[4],[45]   0.80%
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 [1],[2],[3],[4] 1,482  
Fair value at ending balance [1],[2],[3],[4]   $ 1,482
Interest [1],[2],[3],[4]   5.25%
Interest [1],[2],[3],[4]   10.60%
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 609  
Interest [5],[28],[29],[41] 8.30%  
Interest [5],[28],[29],[41] 12.90%  
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 [1],[2],[4],[7] $ 605  
Fair value at ending balance [1],[2],[4],[7]   $ 605
Interest [1],[2],[4],[7]   8.30%
Interest [1],[2],[4],[7]   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 [4],[11] 298  
Fair value at ending balance [4],[11]   $ 298
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   29,762
Investment, Identifier [Axis]: Parkview Dental Holdings LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 263  
Investment owned, balance (in shares) [29],[34] 29,762  
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 [2],[3],[4],[37] $ 2,327  
Fair value at ending balance [2],[3],[4],[37]   $ 2,327
Interest [2],[3],[4],[37]   6.75%
Interest [2],[3],[4],[37]   10.70%
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 [1],[2],[3],[4] 2,804  
Fair value at ending balance [1],[2],[3],[4]   $ 2,804
Interest [1],[2],[3],[4]   6.75%
Interest [1],[2],[3],[4]   12.30%
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 2,045  
Interest [28],[29],[33],[38] 6.75%  
Interest [28],[29],[33],[38] 9.80%  
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 2,628  
Interest [28],[29],[30],[33] 7.01%  
Interest [28],[29],[30],[33] 11.60%  
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 [3],[4] $ 172  
Fair value at ending balance [3],[4]   $ 172
Interest [3],[4]   4.70%
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4] 173  
Fair value at ending balance [3],[4]   $ 173
Interest [3],[4]   5.40%
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4] 167  
Fair value at ending balance [3],[4]   $ 167
Interest [3],[4]   5.90%
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class D    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4] 166  
Fair value at ending balance [3],[4]   $ 166
Interest [3],[4]   8.50%
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class E    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [3],[4] 8,503  
Fair value at ending balance [3],[4]   $ 8,503
Interest [3],[4]   11.40%
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 177  
Interest [29],[33] 4.70%  
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 178  
Interest [29],[33] 5.40%  
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 180  
Interest [29],[33] 5.90%  
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class D    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 178  
Interest [29],[33] 8.50%  
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Structured Secured Note - Class E    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 8,904  
Interest [29],[33] 11.40%  
Investment, Identifier [Axis]: Permaconn BidCo Pty Ltd, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[48] $ 2,537  
Interest [28],[29],[33],[48] 5.25%  
Interest [28],[29],[33],[48] 9.70%  
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 [2],[3],[4],[63] $ 2,743  
Fair value at ending balance [2],[3],[4],[63]   $ 2,743
Interest [2],[3],[4],[63]   6.25%
Interest [2],[3],[4],[63]   10.70%
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 [1],[2],[4] 1,118  
Fair value at ending balance [1],[2],[4]   $ 1,118
Interest [1],[2],[4]   4.75%
Interest [1],[2],[4]   10.20%
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 [4] 1,285  
Fair value at ending balance [4]   $ 1,285
Investment owned, balance (in shares) [4],[6],[8],[9]   7,409
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 [1],[2],[4],[7] 0  
Fair value at ending balance [1],[2],[4],[7]   $ 0
Interest [1],[2],[4],[7]   4.75%
Interest [1],[2],[4],[7]   10.20%
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 957  
Interest [28],[29],[30] 4.75%  
Interest [28],[29],[30] 9.50%  
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 1,229  
Investment owned, balance (in shares) [29] 7,409  
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.50%  
Investment, Identifier [Axis]: Policy Services Company, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 52,940  
Interest [28],[29],[30] 6.00%  
Interest [28],[29],[30] 10.90%  
Investment, interest rate, paid in kind [28],[29],[30] 4.00%  
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 [1],[2],[4] $ 50,498  
Fair value at ending balance [1],[2],[4]   $ 50,498
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.60%
Investment, interest rate, paid in kind [1],[2],[4]   4.00%
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[11] 1,297  
Fair value at ending balance [4],[11]   $ 1,297
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   2.55830
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 [4],[11] 438  
Fair value at ending balance [4],[11]   $ 438
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   0.86340
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 [4],[11] 0  
Fair value at ending balance [4],[11]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   0.08870
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 [4],[11] 125  
Fair value at ending balance [4],[11]   $ 125
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   0.24710
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 1,262  
Investment owned, balance (in shares) [29],[34] 2.5582  
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 426  
Investment owned, balance (in shares) [29],[34] 0.8634  
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 0  
Investment owned, balance (in shares) [29],[34] 0.0888  
Investment, Identifier [Axis]: Policy Services Company, LLC, Warrants - Class D    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 122  
Investment owned, balance (in shares) [29],[34] 0.2471  
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 [4],[11] $ 0  
Fair value at ending balance [4],[11]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   74
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 [2],[4],[10],[35] 936  
Fair value at ending balance [2],[4],[10],[35]   $ 936
Interest [2],[4],[10],[35]   7.00%
Interest [2],[4],[10],[35]   12.40%
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 0  
Investment owned, balance (in shares) [29],[34] 74  
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[36],[41],[56] $ 554  
Interest [28],[29],[36],[41],[56] 7.00%  
Interest [28],[29],[36],[41],[56] 11.30%  
Investment, Identifier [Axis]: PowerGEM Buyer, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 6,710  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.50%  
Investment, Identifier [Axis]: PowerGEM Buyer, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (26)  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.50%  
Investment, Identifier [Axis]: Premium Franchise Brands, LLC, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 7,377  
Interest [28],[29],[30] 6.25%  
Interest [28],[29],[30] 10.70%  
Investment, Identifier [Axis]: Premium Franchise Brands, LLC, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 2,694  
Interest [28],[29],[30] 6.75%  
Interest [28],[29],[30] 11.20%  
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 [1],[2],[4] $ 7,511  
Fair value at ending balance [1],[2],[4]   $ 7,511
Interest [1],[2],[4]   6.75%
Interest [1],[2],[4]   12.50%
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 [2],[3],[4],[7],[45] 9,031  
Fair value at ending balance [2],[3],[4],[7],[45]   $ 9,031
Interest [2],[3],[4],[7],[45]   6.50%
Interest [2],[3],[4],[7],[45]   10.50%
Investment, Identifier [Axis]: Premium Invest, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 8,750  
Interest [5],[28],[29],[33],[38] 5.75%  
Interest [5],[28],[29],[33],[38] 9.10%  
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 [2],[3],[4],[54] $ 2,778  
Fair value at ending balance [2],[3],[4],[54]   $ 2,778
Interest [2],[3],[4],[54]   5.25%
Interest [2],[3],[4],[54]   11.00%
Investment, Identifier [Axis]: Preqin MC Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31],[33] $ 2,789  
Interest [28],[29],[31],[33] 5.00%  
Interest [28],[29],[31],[33] 10.20%  
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 7,662  
Interest [28],[29],[30] 4.50%  
Interest [28],[29],[30] 8.80%  
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 249  
Investment owned, balance (in shares) [29],[34] 2,357.5  
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (28)  
Interest [5],[28],[29],[30] 4.50%  
Interest [5],[28],[29],[30] 8.80%  
Investment, Identifier [Axis]: Process Equipment, Inc. (ProcessBarron), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31] $ 5,338  
Interest [28],[29],[31] 5.25%  
Interest [28],[29],[31] 9.80%  
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 [1],[2],[4] $ 5,462  
Fair value at ending balance [1],[2],[4]   $ 5,462
Interest [1],[2],[4]   5.25%
Interest [1],[2],[4]   11.00%
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 237  
Investment owned, balance (in shares) [29],[34] 281  
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 [4],[11] $ 340  
Fair value at ending balance [4],[11]   $ 340
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   281
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 [1],[2],[4],[7] 5,293  
Fair value at ending balance [1],[2],[4],[7]   $ 5,293
Interest [1],[2],[4],[7]   6.25%
Interest [1],[2],[4],[7]   11.60%
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 [1],[2],[4],[7] (6)  
Fair value at ending balance [1],[2],[4],[7]   $ (6)
Interest [1],[2],[4],[7]   6.25%
Interest [1],[2],[4],[7]   11.60%
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 5,134  
Interest [5],[28],[29],[30] 6.25%  
Interest [5],[28],[29],[30] 10.60%  
Investment, Identifier [Axis]: Process Insights Acquisition, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 889  
Interest [5],[28],[29],[30] 6.25%  
Interest [5],[28],[29],[30] 10.60%  
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 [1],[2],[4] $ 1,783  
Fair value at ending balance [1],[2],[4]   $ 1,783
Interest [1],[2],[4]   4.50%
Interest [1],[2],[4]   10.10%
Investment, Identifier [Axis]: ProfitOptics, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 1,613  
Interest [28],[29],[41] 5.75%  
Interest [28],[29],[41] 10.20%  
Investment, Identifier [Axis]: ProfitOptics, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 198  
Investment owned, balance (in shares) [29],[34] 241,935.48  
Investment, Identifier [Axis]: ProfitOptics, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 242  
Interest [5],[28],[29],[41] 5.75%  
Interest [5],[28],[29],[41] 10.20%  
Investment, Identifier [Axis]: ProfitOptics, LLC, Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 76  
Interest [29] 8.00%  
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 [2],[4],[54] $ 1,635  
Fair value at ending balance [2],[4],[54]   $ 1,635
Interest [2],[4],[54]   5.75%
Interest [2],[4],[54]   11.50%
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[11] 220  
Fair value at ending balance [4],[11]   $ 220
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   241,935.48
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[7],[54] 274  
Fair value at ending balance [2],[4],[7],[54]   $ 274
Interest [2],[4],[7],[54]   5.75%
Interest [2],[4],[7],[54]   11.50%
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 [4] 73  
Fair value at ending balance [4]   $ 73
Interest [4]   8.00%
Investment, Identifier [Axis]: Proppants Holding, LLC, Energy: Oil & Gas, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[10] 0  
Fair value at ending balance [4],[10]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[10]   1,668,106
Investment, Identifier [Axis]: Proppants Holding, LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[36] $ 0  
Investment owned, balance (in shares) [29],[36] 1,506,254  
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 [2],[3],[4],[7],[45] $ 1,630  
Fair value at ending balance [2],[3],[4],[7],[45]   $ 1,630
Interest [2],[3],[4],[7],[45]   6.75%
Interest [2],[3],[4],[7],[45]   10.80%
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 [2],[3],[4],[45] 2,110  
Fair value at ending balance [2],[3],[4],[45]   $ 2,110
Interest [2],[3],[4],[45]   6.50%
Interest [2],[3],[4],[45]   10.50%
Investment, Identifier [Axis]: Protego Bidco B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 1,646  
Interest [28],[29],[33],[42] 6.75%  
Interest [28],[29],[33],[42] 10.00%  
Investment, Identifier [Axis]: Protego Bidco B.V., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 1,974  
Interest [28],[29],[33],[42] 6.50%  
Interest [28],[29],[33],[42] 9.70%  
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 [2],[3],[4],[74] $ 1,852  
Fair value at ending balance [2],[3],[4],[74]   $ 1,852
Interest [2],[3],[4],[74]   4.50%
Interest [2],[3],[4],[74]   8.80%
Investment, Identifier [Axis]: QPE7 SPV1 BidCo Pty Ltd, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[72] $ 1,694  
Interest [28],[29],[33],[72] 3.75%  
Interest [28],[29],[33],[72] 8.10%  
Investment, Identifier [Axis]: Qualified Industries, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 61  
Investment owned, balance (in shares) [29],[34] 303,030  
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 [4],[11] $ 64  
Fair value at ending balance [4],[11]   $ 64
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   303,030
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 [1],[2],[4] 592  
Fair value at ending balance [1],[2],[4]   $ 592
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.20%
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 [4],[11] 159  
Fair value at ending balance [4],[11]   $ 159
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   148
Investment, interest rate, paid in kind [4],[11]   10.00%
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 [1],[2],[4],[7] (2)  
Fair value at ending balance [1],[2],[4],[7]   $ (2)
Interest [1],[2],[4],[7]   5.75%
Interest [1],[2],[4],[7]   11.20%
Investment, Identifier [Axis]: Qualified Industries, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31] $ 2,567  
Interest [28],[29],[31] 5.75%  
Interest [28],[29],[31] 10.10%  
Investment, Identifier [Axis]: Qualified Industries, LLC, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 175  
Investment owned, balance (in shares) [29],[34] 148  
Investment, interest rate, paid in kind [29],[34] 12.50%  
Investment, Identifier [Axis]: Qualified Industries, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31] $ (5)  
Interest [5],[28],[29],[31] 5.75%  
Interest [5],[28],[29],[31] 10.10%  
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 [1],[2],[3],[4] $ 6,732  
Fair value at ending balance [1],[2],[3],[4]   $ 6,732
Interest [1],[2],[3],[4]   6.25%
Interest [1],[2],[3],[4]   11.70%
Investment, Identifier [Axis]: Questel Unite, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 7,059  
Interest [28],[29],[30],[33] 6.25%  
Interest [28],[29],[30],[33] 10.80%  
Investment, Identifier [Axis]: R1 Holdings, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 6,135  
Interest [28],[29],[41] 6.25%  
Interest [28],[29],[41] 10.80%  
Investment, Identifier [Axis]: R1 Holdings, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 472  
Interest [5],[28],[29],[41] 6.25%  
Interest [5],[28],[29],[41] 10.80%  
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 [2],[4],[7],[54] $ 6,001  
Fair value at ending balance [2],[4],[7],[54]   $ 6,001
Interest [2],[4],[7],[54]   6.25%
Interest [2],[4],[7],[54]   11.60%
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[7],[54] 80  
Fair value at ending balance [2],[4],[7],[54]   $ 80
Interest [2],[4],[7],[54]   6.25%
Interest [2],[4],[7],[54]   11.60%
Investment, Identifier [Axis]: RA Outdoors, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[36] $ 12,732  
Interest [28],[29],[30],[36] 6.75%  
Interest [28],[29],[30],[36] 11.70%  
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 [1],[2],[4],[10] $ 12,723  
Fair value at ending balance [1],[2],[4],[10]   $ 12,723
Interest [1],[2],[4],[10]   6.75%
Interest [1],[2],[4],[10]   12.00%
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 [1],[2],[4],[7],[10] 778  
Fair value at ending balance [1],[2],[4],[7],[10]   $ 778
Interest [1],[2],[4],[7],[10]   6.75%
Interest [1],[2],[4],[7],[10]   12.00%
Investment, Identifier [Axis]: RA Outdoors, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[36] $ 1,217  
Interest [28],[29],[30],[36] 6.75%  
Interest [28],[29],[30],[36] 11.70%  
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 [2],[4],[37] $ 9,498  
Fair value at ending balance [2],[4],[37]   $ 9,498
Interest [2],[4],[37]   5.00%
Interest [2],[4],[37]   8.90%
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 [2],[4] 1,949  
Fair value at ending balance [2],[4]   $ 1,949
Interest [2],[4]   5.00%
Interest [2],[4]   10.40%
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 4,595  
Investment owned, balance (in shares) [29],[34] 1,231  
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 1,015  
Interest [28],[29],[30] 8.00%  
Interest [28],[29],[30] 12.50%  
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, First Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 2,577  
Interest [28],[29],[30] 8.00%  
Interest [28],[29],[30] 12.50%  
Investment, Identifier [Axis]: ROI Solutions LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 17,973  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.60%  
Investment, Identifier [Axis]: ROI Solutions LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (55)  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.60%  
Investment, Identifier [Axis]: RPX Corporation, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 21,638  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.60%  
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 [1],[2],[4] $ 4,732  
Fair value at ending balance [1],[2],[4]   $ 4,732
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   11.00%
Investment, Identifier [Axis]: RPX Corporation, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (39)  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.60%  
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Class A Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34],[36] $ 0  
Investment owned, balance (in shares) [29],[34],[36] 145.347  
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Class B Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34],[36] $ 0  
Investment owned, balance (in shares) [29],[34],[36] 145.347  
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Class C Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34],[36] $ 57  
Investment owned, balance (in shares) [29],[34],[36] 7,844.03  
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34],[36] $ 0  
Investment owned, balance (in shares) [29],[34],[36] 153  
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 [4],[10],[11] $ 0  
Fair value at ending balance [4],[10],[11]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[10],[11]   145.347
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class B Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[10],[11] 0  
Fair value at ending balance [4],[10],[11]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[10],[11]   145.347
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class C Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[10],[11] 73  
Fair value at ending balance [4],[10],[11]   $ 73
Investment owned, balance (in shares) [4],[6],[8],[9],[10],[11]   7,844.03
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[10],[11] 0  
Fair value at ending balance [4],[10],[11]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[10],[11]   153
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[10] 8,717  
Fair value at ending balance [1],[2],[4],[10]   $ 8,717
Interest [1],[2],[4],[10]   7.75%
Interest [1],[2],[4],[10]   13.10%
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 [1],[2],[4],[7],[10] 524  
Fair value at ending balance [1],[2],[4],[7],[10]   $ 524
Interest [1],[2],[4],[7],[10]   7.75%
Interest [1],[2],[4],[7],[10]   13.10%
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 [1],[2],[4],[7] 9,890  
Fair value at ending balance [1],[2],[4],[7]   $ 9,890
Interest [1],[2],[4],[7]   6.50%
Interest [1],[2],[4],[7]   11.90%
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 [4],[11] 570  
Fair value at ending balance [4],[11]   $ 570
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   5,333
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 505  
Fair value at ending balance [1],[2],[4],[7]   $ 505
Interest [1],[2],[4],[7]   6.50%
Interest [1],[2],[4],[7]   11.90%
Investment, Identifier [Axis]: Randys Holdings, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 10,873  
Interest [5],[28],[29],[30] 6.25%  
Interest [5],[28],[29],[30] 11.20%  
Investment, Identifier [Axis]: Randys Holdings, Inc., Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 622  
Investment owned, balance (in shares) [29],[34] 5,333  
Investment, Identifier [Axis]: Randys Holdings, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 613  
Interest [5],[28],[29],[30] 6.25%  
Interest [5],[28],[29],[30] 11.20%  
Investment, Identifier [Axis]: Rapid Buyer LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31] $ 5,313  
Interest [5],[28],[29],[31] 4.75%  
Interest [5],[28],[29],[31] 9.40%  
Investment, Identifier [Axis]: Rapid Buyer LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 533  
Investment owned, balance (in shares) [29],[34] 533  
Investment, Identifier [Axis]: Rapid Buyer LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (22)  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.40%  
Investment, Identifier [Axis]: Recovery Point Systems, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 11,294  
Interest [28],[29],[30] 6.00%  
Interest [28],[29],[30] 10.70%  
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 81  
Investment owned, balance (in shares) [29],[34] 187,235  
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 [1],[2],[4] $ 11,442  
Fair value at ending balance [1],[2],[4]   $ 11,442
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.40%
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 [4],[11] 103  
Fair value at ending balance [4],[11]   $ 103
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   187,235
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 4,308  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.10%  
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 [1],[2],[4] $ 4,167  
Fair value at ending balance [1],[2],[4]   $ 4,167
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   11.00%
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 [4],[11] 67  
Fair value at ending balance [4],[11]   $ 67
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   197,368.42
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 85  
Investment owned, balance (in shares) [29],[34] 202,393.6  
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 [1],[2],[4],[10] $ 762  
Fair value at ending balance [1],[2],[4],[10]   $ 762
Interest [1],[2],[4],[10]   8.00%
Interest [1],[2],[4],[10]   13.60%
Investment, Identifier [Axis]: Resolute Investment Managers, Inc., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34],[36] $ 98  
Investment owned, balance (in shares) [29],[34],[36] 38,571  
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 [1],[2],[4] $ 3,991  
Fair value at ending balance [1],[2],[4]   $ 3,991
Interest [1],[2],[4]   7.00%
Interest [1],[2],[4]   12.60%
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 [3],[4],[7] 29,586  
Fair value at ending balance [3],[4],[7]   $ 29,586
Investment, Identifier [Axis]: Rhondda Financing No. 1 DAC, Structured - Junior Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[29],[33] 26,044  
Investment, Identifier [Axis]: Riedel Beheer B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 1,963  
Interest [28],[29],[33],[38] 6.25%  
Interest [28],[29],[33],[38] 9.60%  
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 [2],[3],[4],[37] $ 2,078  
Fair value at ending balance [2],[3],[4],[37]   $ 2,078
Interest [2],[3],[4],[37]   6.25%
Interest [2],[3],[4],[37]   10.20%
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 844 [18] $ 0 [27]
Gross Additions 0 [12],[18] 0 [13],[27]
Gross Reductions 0 [14],[18] 0 [15],[27]
Amount of Realized Gain (Loss) 0 [18] 0 [27]
Amount of Unrealized Gain (Loss) (601) [18] 844 [27]
Fair value at ending balance [18] 243 [29],[34] 844
Amount of Interest or Dividends Credited to Income $ 0 [16],[18] $ 0 [17],[27]
Investment owned, balance (in shares) 23.8 [18],[29],[34] 23.8 [27]
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 [4],[11] $ 844  
Fair value at ending balance [4],[11]   $ 844
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   23.8
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 [1],[4],[7] 73,113  
Fair value at ending balance [1],[4],[7]   $ 73,113
Interest [1],[4],[7]   6.00%
Investment owned, balance (in shares) [1],[4],[6],[7],[8],[9]   67,500
Investment, interest rate, paid in kind [1],[4],[7]   11.30%
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 [27] 73,113 $ 0
Gross Additions [13],[27]   73,113
Gross Reductions [15],[27]   0
Amount of Realized Gain (Loss) [27]   0
Amount of Unrealized Gain (Loss) [27]   0
Fair value at ending balance [27]   73,113
Amount of Interest or Dividends Credited to Income [17],[27]   $ 5,612
Interest [27]   6.00%
Investment owned, balance (in shares) [27]   67,500
Investment, interest rate, paid in kind [27]   11.30%
Investment, Identifier [Axis]: Rocade Holdings LLC, Preferred LP Units 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[29],[30] $ 83,000  
Interest [5],[29],[30] 6.00%  
Investment owned, balance (in shares) [5],[29],[30] 71,000  
Investment, interest rate, paid in kind [5],[29],[30] 10.30%  
Investment, Identifier [Axis]: Rocade Holdings LLC, Preferred LP Units 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] $ 73,113  
Gross Additions [12],[18] 12,098  
Gross Reductions [14],[18] (2,222)  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] 11  
Fair value at ending balance [18] 83,000 $ 73,113
Amount of Interest or Dividends Credited to Income [16],[18] $ 8,598  
Interest [18] 6.00%  
Investment owned, balance (in shares) [18] 71,000  
Investment, interest rate, paid in kind [18] 10.30%  
Investment, Identifier [Axis]: Rock Labor LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 6,426  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.70%  
Investment, Identifier [Axis]: Rock Labor LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 1,127  
Investment owned, balance (in shares) [29] 233,871  
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 [4],[11] $ 1,534  
Fair value at ending balance [4],[11]   $ 1,534
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   233,871
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 [2],[4],[35] 6,422  
Fair value at ending balance [2],[4],[35]   $ 6,422
Interest [2],[4],[35]   7.50%
Interest [2],[4],[35]   12.90%
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 [2],[4],[7],[35] (30)  
Fair value at ending balance [2],[4],[7],[35]   $ (30)
Interest [2],[4],[7],[35]   7.50%
Interest [2],[4],[7],[35]   12.90%
Investment, Identifier [Axis]: Rock Labor LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (19)  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.70%  
Investment, Identifier [Axis]: Royal Buyer, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 8,098  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.00%  
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 [1],[2],[4],[7] $ 7,164  
Fair value at ending balance [1],[2],[4],[7]   $ 7,164
Interest [1],[2],[4],[7]   5.50%
Interest [1],[2],[4],[7]   10.90%
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 388  
Fair value at ending balance [1],[2],[4],[7]   $ 388
Interest [1],[2],[4],[7]   5.50%
Interest [1],[2],[4],[7]   10.90%
Investment, Identifier [Axis]: Royal Buyer, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (2)  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.00%  
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 6,792  
Interest [28],[29],[30] 2.25%  
Interest [28],[29],[30] 7.00%  
Investment, interest rate, paid in kind [28],[29],[30] 4.30%  
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 [1],[2],[4] $ 9,241  
Fair value at ending balance [1],[2],[4]   $ 9,241
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.40%
Investment, interest rate, paid in kind [1],[2],[4]   0.50%
Investment, Identifier [Axis]: Russell Investments US Institutional Holdco, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 508  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 8.20%  
Investment, interest rate, paid in kind [28],[29],[30] 1.50%  
Investment, Identifier [Axis]: SBP Holdings LP, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 8,648  
Interest [5],[28],[29],[41] 5.00%  
Interest [5],[28],[29],[41] 9.60%  
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 [1],[2],[4],[7] $ 13,442  
Fair value at ending balance [1],[2],[4],[7]   $ 13,442
Interest [1],[2],[4],[7]   6.75%
Interest [1],[2],[4],[7]   12.10%
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 [1],[2],[4],[7] (19)  
Fair value at ending balance [1],[2],[4],[7]   $ (19)
Interest [1],[2],[4],[7]   6.75%
Interest [1],[2],[4],[7]   12.10%
Investment, Identifier [Axis]: SBP Holdings LP, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (13)  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.60%  
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 [2],[4],[7],[35] $ 6,463  
Fair value at ending balance [2],[4],[7],[35]   $ 6,463
Interest [2],[4],[7],[35]   5.75%
Interest [2],[4],[7],[35]   11.10%
Investment, Identifier [Axis]: SISU ACQUISITIONCO., INC., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 6,591  
Interest [5],[28],[29],[30] 5.75%  
Interest [5],[28],[29],[30] 10.50%  
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 [1],[2],[4] $ 10,592  
Fair value at ending balance [1],[2],[4]   $ 10,592
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.20%
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 280  
Investment owned, balance (in shares) [29],[34] 274,229  
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 6,990  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.60%  
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (18)  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.60%  
Investment, Identifier [Axis]: SSCP Pegasus Midco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[44] $ 4,368  
Interest [5],[28],[29],[33],[44] 6.00%  
Interest [5],[28],[29],[33],[44] 10.70%  
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 [2],[3],[4],[7],[39] $ 3,416  
Fair value at ending balance [2],[3],[4],[7],[39]   $ 3,416
Interest [2],[3],[4],[7],[39]   6.00%
Interest [2],[3],[4],[7],[39]   11.30%
Investment, Identifier [Axis]: SSCP Spring Bidco 3 Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46] $ 941  
Interest [28],[29],[33],[46] 6.45%  
Interest [28],[29],[33],[46] 11.20%  
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 [2],[3],[4],[47] $ 947  
Fair value at ending balance [2],[3],[4],[47]   $ 947
Interest [2],[3],[4],[47]   6.50%
Interest [2],[3],[4],[47]   11.70%
Investment, Identifier [Axis]: SVI International LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 583  
Interest [5],[28],[29],[30] 6.75%  
Interest [5],[28],[29],[30] 11.30%  
Investment, Identifier [Axis]: SVI International LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 277  
Investment owned, balance (in shares) [29] 207,921  
Investment, Identifier [Axis]: SVI International LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (1)  
Interest [5],[28],[29],[30] 6.75%  
Interest [5],[28],[29],[30] 11.30%  
Investment, Identifier [Axis]: Saab Purchaser, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 17,592  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.50%  
Investment, Identifier [Axis]: Saab Purchaser, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (24)  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.50%  
Investment, Identifier [Axis]: Safety Products Holdings, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 14,812  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.50%  
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 [1],[2],[4] $ 11,567  
Fair value at ending balance [1],[2],[4]   $ 11,567
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.50%
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 [4],[11] 468  
Fair value at ending balance [4],[11]   $ 468
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   378.7
Investment, Identifier [Axis]: Safety Products Holdings, LLC, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 537  
Investment owned, balance (in shares) [29],[34] 378.7  
Investment, Identifier [Axis]: Sanoptis S.A.R.L., First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[42] $ 3,692  
Interest [5],[28],[29],[33],[42] 5.75%  
Interest [5],[28],[29],[33],[42] 8.80%  
Investment, Identifier [Axis]: Sanoptis S.A.R.L., First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[66] $ 2,788  
Interest [28],[29],[33],[66] 5.75%  
Interest [28],[29],[33],[66] 7.00%  
Investment, Identifier [Axis]: Sanoptis S.A.R.L., First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[66] $ 46  
Interest [28],[29],[33],[66] 6.75%  
Interest [28],[29],[33],[66] 8.00%  
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 [2],[3],[4],[7],[37] $ 2,585  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 2,585
Interest [2],[3],[4],[7],[37]   5.50%
Interest [2],[3],[4],[7],[37]   9.40%
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[65] 3,357  
Fair value at ending balance [2],[3],[4],[65]   $ 3,357
Interest [2],[3],[4],[65]   5.50%
Interest [2],[3],[4],[65]   7.20%
Investment, Identifier [Axis]: Sansidor BV, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 534  
Interest [5],[28],[29],[33],[38] 5.25%  
Interest [5],[28],[29],[33],[38] 8.60%  
Investment, Identifier [Axis]: Scaled Agile, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 1,605  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.20%  
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 [1],[2],[4] $ 1,759  
Fair value at ending balance [1],[2],[4]   $ 1,759
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   10.90%
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 [1],[2],[4],[7] 48  
Fair value at ending balance [1],[2],[4],[7]   $ 48
Interest [1],[2],[4],[7]   5.50%
Interest [1],[2],[4],[7]   10.90%
Investment, Identifier [Axis]: Scaled Agile, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 302  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.20%  
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 [2],[3],[4],[37] $ 3,480  
Fair value at ending balance [2],[3],[4],[37]   $ 3,480
Interest [2],[3],[4],[37]   5.75%
Interest [2],[3],[4],[37]   9.70%
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 [1],[2],[3],[4] 437  
Fair value at ending balance [1],[2],[3],[4]   $ 437
Interest [1],[2],[3],[4]   5.75%
Interest [1],[2],[3],[4]   11.10%
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 [2],[3],[4],[7],[37] 410  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 410
Interest [2],[3],[4],[7],[37]   5.75%
Interest [2],[3],[4],[7],[37]   9.70%
Investment, Identifier [Axis]: Scout Bidco B.V., First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 3,297  
Interest [28],[29],[33],[38] 5.50%  
Interest [28],[29],[33],[38] 8.40%  
Investment, Identifier [Axis]: Scout Bidco B.V., First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 442  
Interest [28],[29],[30],[33] 5.57%  
Interest [28],[29],[30],[33] 10.10%  
Investment, Identifier [Axis]: Scout Bidco B.V., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ (14)  
Interest [5],[28],[29],[33],[38] 5.50%  
Interest [5],[28],[29],[33],[38] 8.40%  
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [25] $ 6,328  
Gross Additions [19],[25] 327  
Gross Reductions [21],[25] 0  
Amount of Realized Gain (Loss) [25] 0  
Amount of Unrealized Gain (Loss) [25] 0  
Fair value at ending balance [25] 6,655 $ 6,328
Amount of Interest or Dividends Credited to Income [23],[25] $ 326  
Investment, interest rate, paid in kind 5.00%  
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 [26] $ 3,866 0
Gross Additions [20],[26]   3,840
Gross Reductions [22],[26]   (22)
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   48
Fair value at ending balance [26]   3,866
Amount of Interest or Dividends Credited to Income [24],[26]   $ 168
Interest [26]   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 [26] 6,328 $ 6,020
Gross Additions [20],[26]   308
Gross Reductions [22],[26]   0
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   0
Fair value at ending balance [26]   6,328
Amount of Interest or Dividends Credited to Income [24],[26]   $ 309
Investment, interest rate, paid in kind [26]   5.00%
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [25] 311  
Gross Additions [19],[25] 0  
Gross Reductions [21],[25] 0  
Amount of Realized Gain (Loss) [25] 0  
Amount of Unrealized Gain (Loss) [25] 88  
Fair value at ending balance [25] 399 $ 311
Amount of Interest or Dividends Credited to Income [23],[25] $ 0  
Investment owned, balance (in shares) 17,100  
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series A, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [26] $ 311 575
Gross Additions [20],[26]   0
Gross Reductions [22],[26]   0
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   (264)
Fair value at ending balance [26]   311
Amount of Interest or Dividends Credited to Income [24],[26]   $ 0
Investment owned, balance (in shares) [26]   17,100
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [25] 29,080  
Gross Additions [19],[25] 0  
Gross Reductions [21],[25] 0  
Amount of Realized Gain (Loss) [25] 0  
Amount of Unrealized Gain (Loss) [25] 8,216  
Fair value at ending balance [25] 37,296 $ 29,080
Amount of Interest or Dividends Credited to Income [23],[25] $ 0  
Investment owned, balance (in shares) 1,236  
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series B, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [26] $ 29,080 53,728
Gross Additions [20],[26]   0
Gross Reductions [22],[26]   0
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   (24,648)
Fair value at ending balance [26]   29,080
Amount of Interest or Dividends Credited to Income [24],[26]   $ 0
Investment owned, balance (in shares) [26]   1,236
Investment, Identifier [Axis]: Security Holdings B.V, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [25] 3,866  
Gross Additions [19],[25] 1,828  
Gross Reductions [21],[25] (12)  
Amount of Realized Gain (Loss) [25] 17  
Amount of Unrealized Gain (Loss) [25] (366)  
Fair value at ending balance [25] 5,333 $ 3,866
Amount of Interest or Dividends Credited to Income [23],[25] $ 188  
Investment, interest rate, paid in kind 6.00%  
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [25] $ 10,867  
Gross Additions [19],[25] 324  
Gross Reductions [21],[25] 0  
Amount of Realized Gain (Loss) [25] 0  
Amount of Unrealized Gain (Loss) [25] 0  
Fair value at ending balance [25] 11,191 10,867
Amount of Interest or Dividends Credited to Income [23],[25] $ 273  
Investment, interest rate, paid in kind 3.10%  
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Term Loan, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [26] $ 10,867 10,534
Gross Additions [20],[26]   333
Gross Reductions [22],[26]   0
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   0
Fair value at ending balance [26]   10,867
Amount of Interest or Dividends Credited to Income [24],[26]   $ 379
Investment, interest rate, paid in kind [26]   3.10%
Investment, Identifier [Axis]: Security Holdings B.V, Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [25] 2,236  
Gross Additions [19],[25] 208  
Gross Reductions [21],[25] 0  
Amount of Realized Gain (Loss) [25] 0  
Amount of Unrealized Gain (Loss) [25] (151)  
Fair value at ending balance [25] 2,293 $ 2,236
Amount of Interest or Dividends Credited to Income [23],[25] $ 255  
Interest 6.00%  
Investment, interest rate, paid in kind 9.00%  
Investment, Identifier [Axis]: Security Holdings B.V, Senior Unsecured Term Loan, Controlled    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [26] $ 2,236 2,015
Gross Additions [20],[26]   154
Gross Reductions [22],[26]   0
Amount of Realized Gain (Loss) [26]   0
Amount of Unrealized Gain (Loss) [26]   67
Fair value at ending balance [26]   2,236
Amount of Interest or Dividends Credited to Income [24],[26]   $ 374
Interest [26]   6.00%
Investment, interest rate, paid in kind [26]   9.00%
Investment, Identifier [Axis]: Security Holdings B.V., Bridge Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[57],[69] $ 6,655  
Investment, interest rate, paid in kind [29],[33],[57],[69] 5.00%  
Investment, Identifier [Axis]: Security Holdings B.V., Common Stock Series A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34],[69] $ 399  
Investment owned, balance (in shares) [29],[33],[34],[69] 17,100  
Investment, Identifier [Axis]: Security Holdings B.V., Common Stock Series B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34],[69] $ 37,296  
Investment owned, balance (in shares) [29],[33],[34],[69] 1,236  
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 [3],[4],[68] $ 6,328  
Fair value at ending balance [3],[4],[68]   $ 6,328
Investment, interest rate, paid in kind [3],[4],[68]   5.00%
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[11],[68] 311  
Fair value at ending balance [4],[11],[68]   $ 311
Investment owned, balance (in shares) [4],[6],[8],[9],[11],[68]   17,100
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[11],[68] 29,080  
Fair value at ending balance [4],[11],[68]   $ 29,080
Investment owned, balance (in shares) [4],[6],[8],[9],[11],[68]   1,236
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 [3],[4],[7],[68] 3,866  
Fair value at ending balance [3],[4],[7],[68]   $ 3,866
Interest [3],[4],[7],[68]   6.00%
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 [3],[4],[68] 10,867  
Fair value at ending balance [3],[4],[68]   $ 10,867
Investment, interest rate, paid in kind [3],[4],[68]   3.10%
Investment, Identifier [Axis]: Security Holdings B.V., Revolver 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[29],[33],[57],[69] $ 5,333  
Interest [5],[29],[33],[57],[69] 6.00%  
Investment, Identifier [Axis]: Security Holdings B.V., Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[57],[69] $ 11,191  
Investment, interest rate, paid in kind [29],[33],[57],[69] 3.10%  
Investment, Identifier [Axis]: Security Holdings B.V., Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[57],[69] $ 2,293  
Interest [29],[33],[57],[69] 6.00%  
Investment, interest rate, paid in kind [29],[33],[57],[69] 9.00%  
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 [3],[4],[7],[68] $ 2,236  
Fair value at ending balance [3],[4],[7],[68]   $ 2,236
Interest [3],[4],[7],[68]   6.00%
Investment, interest rate, paid in kind [3],[4],[7],[68]   9.00%
Investment, Identifier [Axis]: Sereni Capital NV, Consumer Cyclical, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[45] 2,522  
Fair value at ending balance [2],[3],[4],[45]   $ 2,522
Interest [2],[3],[4],[45]   6.25%
Interest [2],[3],[4],[45]   10.30%
Investment, Identifier [Axis]: Sereni Capital NV, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 903  
Interest [28],[29],[33],[42] 6.00%  
Interest [28],[29],[33],[42] 8.70%  
Investment, Identifier [Axis]: Sereni Capital NV, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 1,524  
Interest [28],[29],[33],[42] 6.75%  
Interest [28],[29],[33],[42] 9.70%  
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [34] $ 655  
Investment owned, balance (in shares) [34] 109,127  
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 [4],[11] $ 791  
Fair value at ending balance [4],[11]   $ 791
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   109,127
Investment, Identifier [Axis]: Shelf Bidco Ltd, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 4,668  
Investment owned, balance (in shares) [29],[33] 1,200,000  
Investment, Identifier [Axis]: Shelf Bidco Ltd, Second Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 12,153  
Interest [28],[29],[30],[33] 5.00%  
Interest [28],[29],[30],[33] 9.60%  
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 [3],[4],[37] $ 1,548  
Fair value at ending balance [3],[4],[37]   $ 1,548
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[37]   1,200,000
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[3],[4] 34,019  
Fair value at ending balance [1],[2],[3],[4]   $ 34,019
Interest [1],[2],[3],[4]   6.00%
Interest [1],[2],[3],[4]   11.70%
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 ending balance [33],[36],[67] 41,453  
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 [3],[10] 39,172  
Fair value at ending balance [3],[10]   $ 39,172
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 0 [12] 0 [13]
Gross Reductions 0 [14] (1,780) [15]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 2,281 3,002
Fair value at ending balance 41,453 39,172
Amount of Interest or Dividends Credited to Income 2,225 [16] 5,655 [17]
Investment, Identifier [Axis]: Sinari Invest, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[42] $ 1,858  
Interest [5],[28],[29],[33],[42] 6.00%  
Interest [5],[28],[29],[33],[42] 9.30%  
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 [2],[3],[4],[7],[45] $ 1,822  
Fair value at ending balance [2],[3],[4],[7],[45]   $ 1,822
Interest [2],[3],[4],[7],[45]   6.00%
Interest [2],[3],[4],[7],[45]   9.90%
Investment, Identifier [Axis]: Skyvault Holdings LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[29] $ 3,586  
Investment, interest rate, paid in kind [5],[29] 12.00%  
Investment, Identifier [Axis]: Skyvault Holdings LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] $ 0  
Gross Additions [12],[18] 3,586  
Gross Reductions [14],[18] 0  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] 0  
Fair value at ending balance [18] 3,586 $ 0
Amount of Interest or Dividends Credited to Income [16],[18] $ 36  
Investment, interest rate, paid in kind [18] 12.00%  
Investment, Identifier [Axis]: Skyvault Holdings LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 1,195  
Investment owned, balance (in shares) [29],[34] 1,195,449.6  
Investment, Identifier [Axis]: Skyvault Holdings LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [18] $ 0  
Gross Additions [12],[18] 1,195  
Gross Reductions [14],[18] 0  
Amount of Realized Gain (Loss) [18] 0  
Amount of Unrealized Gain (Loss) [18] 0  
Fair value at ending balance [18] 1,195 0
Amount of Interest or Dividends Credited to Income [16],[18] $ 0  
Investment owned, balance (in shares) [18] 1,195,449.6  
Investment, Identifier [Axis]: SmartShift Group, Inc., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 483  
Investment owned, balance (in shares) [29],[34] 275  
Investment, Identifier [Axis]: SmartShift Group, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 12,944  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.50%  
Investment, Identifier [Axis]: SmartShift Group, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.50%  
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 [2],[4],[11] $ 288  
Fair value at ending balance [2],[4],[11]   $ 288
Investment owned, balance (in shares) [2],[4],[6],[8],[9],[11]   275
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 [1],[2],[4],[7] 9,332  
Fair value at ending balance [1],[2],[4],[7]   $ 9,332
Interest [1],[2],[4],[7]   6.25%
Interest [1],[2],[4],[7]   11.60%
Investment, Identifier [Axis]: SmartShift Group, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] (38)  
Fair value at ending balance [1],[2],[4],[7]   $ (38)
Interest [1],[2],[4],[7]   6.25%
Interest [1],[2],[4],[7]   11.60%
Investment, Identifier [Axis]: Smartling, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 10,437  
Interest [28],[29],[30] 4.50%  
Interest [28],[29],[30] 9.00%  
Investment, Identifier [Axis]: Smartling, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 4.50%  
Interest [5],[28],[29],[30] 9.00%  
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 [2],[4],[35] $ 10,466  
Fair value at ending balance [2],[4],[35]   $ 10,466
Interest [2],[4],[35]   4.50%
Interest [2],[4],[35]   9.90%
Investment, Identifier [Axis]: Smartling, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[7],[35] (12)  
Fair value at ending balance [2],[4],[7],[35]   $ (12)
Interest [2],[4],[7],[35]   4.50%
Interest [2],[4],[7],[35]   9.90%
Investment, Identifier [Axis]: Smile Brands Group Inc., First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 1,230  
Interest [28],[29],[30] 6.00%  
Interest [28],[29],[30] 10.70%  
Investment, Identifier [Axis]: Smile Brands Group Inc., First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 3,477  
Interest [28],[29],[30] 8.50%  
Interest [28],[29],[30] 13.20%  
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 [1],[2],[4] $ 4,533  
Fair value at ending balance [1],[2],[4]   $ 4,533
Interest [1],[2],[4]   4.50%
Interest [1],[2],[4]   10.00%
Investment, interest rate, paid in kind [1],[2],[4]   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 [3],[4] 8,175  
Fair value at ending balance [3],[4]   $ 8,175
Investment, interest rate, paid in kind [3],[4]   9.50%
Investment, Identifier [Axis]: Solo Buyer, L.P., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 14,826  
Interest [28],[29],[30] 6.25%  
Interest [28],[29],[30] 10.70%  
Investment, Identifier [Axis]: Solo Buyer, L.P., Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 325  
Investment owned, balance (in shares) [29],[34] 516,399  
Investment, Identifier [Axis]: Solo Buyer, L.P., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 466  
Interest [5],[28],[29],[30] 6.25%  
Interest [5],[28],[29],[30] 10.70%  
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 [1],[2],[4] $ 15,140  
Fair value at ending balance [1],[2],[4]   $ 15,140
Interest [1],[2],[4]   6.25%
Interest [1],[2],[4]   11.70%
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 [4],[11] 382  
Fair value at ending balance [4],[11]   $ 382
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   516,399
Investment, Identifier [Axis]: Solo Buyer, L.P., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 615  
Fair value at ending balance [1],[2],[4],[7]   $ 615
Interest [1],[2],[4],[7]   6.25%
Interest [1],[2],[4],[7]   11.70%
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 [3],[10],[11] 579  
Fair value at ending balance [3],[10],[11]   $ 579
Investment, Identifier [Axis]: Sound Point CLO XX, Ltd., Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [33],[34],[36] 61  
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31] $ 2,057  
Interest [5],[28],[29],[31] 5.00%  
Interest [5],[28],[29],[31] 9.20%  
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 [1],[2],[4],[7] $ 1,858  
Fair value at ending balance [1],[2],[4],[7]   $ 1,858
Interest [1],[2],[4],[7]   5.00%
Interest [1],[2],[4],[7]   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 [1],[2],[4],[7] 62  
Fair value at ending balance [1],[2],[4],[7]   $ 62
Interest [1],[2],[4],[7]   5.00%
Interest [1],[2],[4],[7]   10.30%
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31] $ (1)  
Interest [5],[28],[29],[31] 5.00%  
Interest [5],[28],[29],[31] 9.20%  
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 [2],[4],[7],[35] $ 11,461  
Fair value at ending balance [2],[4],[7],[35]   $ 11,461
Interest [2],[4],[7],[35]   5.50%
Interest [2],[4],[7],[35]   10.90%
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 [2],[4],[7],[35] (21)  
Fair value at ending balance [2],[4],[7],[35]   $ (21)
Interest [2],[4],[7],[35]   5.50%
Interest [2],[4],[7],[35]   10.90%
Investment, Identifier [Axis]: Spatial Business Systems LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 14,706  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.00%  
Investment, Identifier [Axis]: Spatial Business Systems LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (21)  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.00%  
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 [1],[2],[4] $ 13,719  
Fair value at ending balance [1],[2],[4]   $ 13,719
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.00%
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 [1],[2],[4] 2,791  
Fair value at ending balance [1],[2],[4]   $ 2,791
Interest [1],[2],[4]   6.50%
Interest [1],[2],[4]   12.00%
Investment, Identifier [Axis]: Starnmeer B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31],[33] $ 2,500  
Interest [28],[29],[31],[33] 5.00%  
Interest [28],[29],[31],[33] 9.60%  
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 [2],[3],[4],[54] $ 2,490  
Fair value at ending balance [2],[3],[4],[54]   $ 2,490
Interest [2],[3],[4],[54]   6.00%
Interest [2],[3],[4],[54]   11.50%
Investment, Identifier [Axis]: Superjet Buyer, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 17,712  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.40%  
Investment, Identifier [Axis]: Superjet Buyer, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (38)  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.40%  
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 [1],[2],[4] $ 12,825  
Fair value at ending balance [1],[2],[4]   $ 12,825
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   10.90%
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 444  
Fair value at ending balance [1],[2],[4],[7]   $ 444
Interest [1],[2],[4],[7]   5.50%
Interest [1],[2],[4],[7]   10.90%
Investment, Identifier [Axis]: Syniverse Holdings, Inc., Series A Preferred Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 10,076  
Investment owned, balance (in shares) [29] 7,575,758  
Investment, interest rate, paid in kind 12.50%  
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 [4] $ 8,788  
Fair value at ending balance [4]   $ 8,788
Investment owned, balance (in shares) [4]   7,575,758
Investment, interest rate, paid in kind [4]   12.50%
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 [2],[3],[4],[7],[35] 1,997  
Fair value at ending balance [2],[3],[4],[7],[35]   $ 1,997
Interest [2],[3],[4],[7],[35]   5.50%
Interest [2],[3],[4],[7],[35]   11.00%
Investment, Identifier [Axis]: Syntax Systems Ltd, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[7],[35] 620  
Fair value at ending balance [2],[3],[4],[7],[35]   $ 620
Interest [2],[3],[4],[7],[35]   5.50%
Interest [2],[3],[4],[7],[35]   11.00%
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 84  
Investment owned, balance (in shares) [29],[34] 1,589  
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 2,785  
Investment, interest rate, paid in kind [29] 7.80%  
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 [4],[11] $ 73  
Fair value at ending balance [4],[11]   $ 73
Investment owned, balance (in shares) [4],[11]   1,589
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 [4] 2,395  
Fair value at ending balance [4]   $ 2,395
Investment, interest rate, paid in kind [4]   7.80%
Investment, Identifier [Axis]: TAPCO Buyer LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 13,517  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.50%  
Investment, Identifier [Axis]: TAPCO Buyer LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 252  
Investment owned, balance (in shares) [29],[34] 252  
Investment, Identifier [Axis]: TAPCO Buyer LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (44)  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.50%  
Investment, Identifier [Axis]: THG Acquisition, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 10,187  
Interest [5],[28],[29],[41] 4.75%  
Interest [5],[28],[29],[41] 9.30%  
Investment, Identifier [Axis]: THG Acquisition, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 97  
Interest [5],[28],[29],[41] 4.75%  
Interest [5],[28],[29],[41] 9.30%  
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 2,572  
Interest [28],[29],[30] 4.50%  
Interest [28],[29],[30] 9.00%  
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 953  
Interest [28],[29],[30] 4.75%  
Interest [28],[29],[30] 9.30%  
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 1,192  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.50%  
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., First Lien Senior Secured Term Loan 4    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 7,837  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.50%  
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 26  
Investment owned, balance (in shares) [29] 4,673  
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (4)  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.30%  
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] $ 810  
Fair value at ending balance [1],[2],[4],[7]   $ 810
Interest [1],[2],[4],[7]   4.75%
Interest [1],[2],[4],[7]   10.10%
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 [1],[2],[4] 584  
Fair value at ending balance [1],[2],[4]   $ 584
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   10.40%
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 [4],[11] 9  
Fair value at ending balance [4],[11]   $ 9
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   4,673
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] (10)  
Fair value at ending balance [1],[2],[4],[7]   $ (10)
Interest [1],[2],[4],[7]   4.75%
Interest [1],[2],[4],[7]   10.10%
Investment, Identifier [Axis]: Tank Holding Corp, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31] $ 7,792  
Interest [28],[29],[31] 5.75%  
Interest [28],[29],[31] 10.20%  
Investment, Identifier [Axis]: Tank Holding Corp, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 2,868  
Interest [5],[28],[29],[41] 6.00%  
Interest [5],[28],[29],[41] 10.70%  
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 [2],[4],[35] $ 7,915  
Fair value at ending balance [2],[4],[35]   $ 7,915
Interest [2],[4],[35]   5.75%
Interest [2],[4],[35]   11.20%
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 [2],[4],[7],[35] 2,430  
Fair value at ending balance [2],[4],[7],[35]   $ 2,430
Interest [2],[4],[7],[35]   6.00%
Interest [2],[4],[7],[35]   11.50%
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 [2],[4],[7],[35] 223  
Fair value at ending balance [2],[4],[7],[35]   $ 223
Interest [2],[4],[7],[35]   5.75%
Interest [2],[4],[7],[35]   11.20%
Investment, Identifier [Axis]: Tank Holding Corp, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[31] $ (12)  
Interest [5],[28],[29],[31] 5.75%  
Interest [5],[28],[29],[31] 10.20%  
Investment, Identifier [Axis]: Tanqueray Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[44] $ 1,643  
Interest [5],[28],[29],[33],[44] 5.25%  
Interest [5],[28],[29],[33],[44] 10.00%  
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 [2],[3],[4],[7],[39] $ 1,730  
Fair value at ending balance [2],[3],[4],[7],[39]   $ 1,730
Interest [2],[3],[4],[7],[39]   5.50%
Interest [2],[3],[4],[7],[39]   10.70%
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 [4],[11] 420  
Fair value at ending balance [4],[11]   $ 420
Investment owned, balance (in shares) [4],[11]   400,000
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 [4],[11] 590  
Fair value at ending balance [4],[11]   $ 590
Interest [4],[11]   12.00%
Investment, Identifier [Axis]: Team Air Distributing, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 35  
Interest [29] 12.00%  
Investment, Identifier [Axis]: Team Air Distributing, LLC, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 625  
Investment owned, balance (in shares) [29],[34] 516,640.2  
Investment, Identifier [Axis]: Team Air Distributing, LLC, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 702  
Interest [29] 12.00%  
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 [1],[2],[4],[10] $ 10,382  
Fair value at ending balance [1],[2],[4],[10]   $ 10,382
Interest [1],[2],[4],[10]   7.50%
Interest [1],[2],[4],[10]   13.10%
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 [2],[10],[54] 9,646  
Fair value at ending balance [2],[10],[54]   $ 9,646
Interest [2],[10],[54]   5.00%
Interest [2],[10],[54]   10.90%
Investment, Identifier [Axis]: Team Services Group, Services: Consumer, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[10],[54] 4,694  
Fair value at ending balance [2],[4],[10],[54]   $ 4,694
Interest [2],[4],[10],[54]   9.00%
Interest [2],[4],[10],[54]   14.90%
Investment, Identifier [Axis]: Technology Service Stream BidCo Pty Ltd, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[40] $ 677  
Interest [5],[28],[29],[33],[40] 5.50%  
Interest [5],[28],[29],[33],[40] 10.30%  
Investment, Identifier [Axis]: Techone B.V., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 3,609  
Interest [28],[29],[33],[38] 5.40%  
Interest [28],[29],[33],[38] 8.70%  
Investment, Identifier [Axis]: Techone B.V., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ (4)  
Interest [5],[28],[29],[33],[38] 5.40%  
Interest [5],[28],[29],[33],[38] 8.70%  
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 [2],[3],[4],[37] $ 3,814  
Fair value at ending balance [2],[3],[4],[37]   $ 3,814
Interest [2],[3],[4],[37]   5.50%
Interest [2],[3],[4],[37]   9.30%
Investment, Identifier [Axis]: Techone B.V., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[7],[37] 201  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 201
Interest [2],[3],[4],[7],[37]   5.50%
Interest [2],[3],[4],[7],[37]   9.30%
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 [1],[2],[4] 6,226  
Fair value at ending balance [1],[2],[4]   $ 6,226
Interest [1],[2],[4]   5.00%
Interest [1],[2],[4]   10.60%
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 [1],[2],[4],[7] (6)  
Fair value at ending balance [1],[2],[4],[7]   $ (6)
Interest [1],[2],[4],[7]   5.00%
Interest [1],[2],[4],[7]   10.60%
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 8,364  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.80%  
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (18)  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.80%  
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 [4],[11] $ 115  
Fair value at ending balance [4],[11]   $ 115
Investment owned, balance (in shares) [4],[11]   24,358.97
Investment, Identifier [Axis]: Terrybear, Inc., Consumer Products, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] 260  
Fair value at ending balance [4]   $ 260
Interest [4]   10.00%
Investment, interest rate, paid in kind [4]   4.00%
Investment, Identifier [Axis]: Terrybear, Inc., Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 120  
Investment owned, balance (in shares) [29],[34] 24,358.97  
Investment, Identifier [Axis]: Terrybear, Inc., Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 268  
Interest [29] 10.00%  
Investment, interest rate, paid in kind [29] 4.00%  
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] $ 830  
Fair value at ending balance [1],[2],[4],[7]   $ 830
Interest [1],[2],[4],[7]   4.25%
Interest [1],[2],[4],[7]   9.60%
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 [1],[2],[4],[7] 0  
Fair value at ending balance [1],[2],[4],[7]   $ 0
Interest [1],[2],[4],[7]   4.25%
Interest [1],[2],[4],[7]   9.60%
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 [2],[4],[54] 3,578  
Fair value at ending balance [2],[4],[54]   $ 3,578
Interest [2],[4],[54]   7.75%
Interest [2],[4],[54]   13.20%
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 2,647  
Interest [28],[29],[30] 4.25%  
Interest [28],[29],[30] 8.80%  
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 0  
Interest [5],[28],[29],[30] 4.25%  
Interest [5],[28],[29],[30] 8.80%  
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[31] $ 3,791  
Interest [28],[29],[31] 7.75%  
Interest [28],[29],[31] 9.00%  
Investment, interest rate, paid in kind [28],[29],[31] 3.20%  
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 [2],[4],[35] $ 12,680  
Fair value at ending balance [2],[4],[35]   $ 12,680
Interest [2],[4],[35]   5.75%
Interest [2],[4],[35]   11.10%
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 [2],[4],[7],[35] 0  
Fair value at ending balance [2],[4],[7],[35]   $ 0
Interest [2],[4],[7],[35]   5.75%
Interest [2],[4],[7],[35]   11.10%
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 [4] 4,882  
Fair value at ending balance [4]   $ 4,882
Investment, interest rate, paid in kind [4]   12.50%
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 [2],[4],[7],[35] 11,317  
Fair value at ending balance [2],[4],[7],[35]   $ 11,317
Interest [2],[4],[7],[35]   5.75%
Interest [2],[4],[7],[35]   11.20%
Investment, Identifier [Axis]: The Octave Music Group, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[30] $ 3,595  
Interest [28],[30] 4.75%  
Interest [28],[30] 9.10%  
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[11] $ 2,152  
Fair value at ending balance [4],[11]   $ 2,152
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   676,880.98
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4] 4,240  
Fair value at ending balance [1],[2],[4]   $ 4,240
Interest [1],[2],[4]   7.50%
Interest [1],[2],[4]   12.80%
Investment, Identifier [Axis]: The Octave Music Group, Inc., Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 2,180  
Investment owned, balance (in shares) [29] 676,881  
Investment, Identifier [Axis]: Thompson Rivers LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [34],[67] $ 7,208  
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 [11] 13,365  
Fair value at ending balance [11]   $ 13,365
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 0 [12] 0 [13]
Gross Reductions (5,991) [14] (17,733) [15]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (166) 759
Fair value at ending balance 7,208 13,365
Amount of Interest or Dividends Credited to Income 0 [16] 0 [17]
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 [2],[35] 5,433  
Fair value at ending balance [2],[35]   $ 5,433
Interest [2],[35]   6.00%
Interest [2],[35]   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 [2],[4],[35] 3,717  
Fair value at ending balance [2],[4],[35]   $ 3,717
Interest [2],[4],[35]   6.00%
Interest [2],[4],[35]   11.50%
Investment, interest rate, paid in kind [2],[4],[35]   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 [2],[3],[4],[50] 4,617  
Fair value at ending balance [2],[3],[4],[50]   $ 4,617
Interest [2],[3],[4],[50]   6.75%
Interest [2],[3],[4],[50]   12.20%
Investment, Identifier [Axis]: Trader Corporation, Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[7],[50] (6)  
Fair value at ending balance [2],[3],[4],[7],[50]   $ (6)
Interest [2],[3],[4],[7],[50]   6.75%
Interest [2],[3],[4],[7],[50]   12.20%
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 [1],[2],[4] 6,035  
Fair value at ending balance [1],[2],[4]   $ 6,035
Interest [1],[2],[4]   4.75%
Interest [1],[2],[4]   10.30%
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 [2],[4],[54] 10,335  
Fair value at ending balance [2],[4],[54]   $ 10,335
Interest [2],[4],[54]   4.50%
Interest [2],[4],[54]   10.00%
Investment, Identifier [Axis]: Transportation Insight, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 8,518  
Interest [28],[29],[30] 4.50%  
Interest [28],[29],[30] 9.20%  
Investment, interest rate, paid in kind [28],[29],[30] 1.00%  
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 [1],[2],[4] $ 15,409  
Fair value at ending balance [1],[2],[4]   $ 15,409
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   10.90%
Investment, Identifier [Axis]: Trident Maritime Systems, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 14,420  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.30%  
Investment, Identifier [Axis]: Trintech, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 6,787  
Interest [28],[29],[41] 5.50%  
Interest [28],[29],[41] 10.10%  
Investment, Identifier [Axis]: Trintech, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 145  
Interest [5],[28],[29],[41] 5.50%  
Interest [5],[28],[29],[41] 10.10%  
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 [2],[4],[35] $ 6,790  
Fair value at ending balance [2],[4],[35]   $ 6,790
Interest [2],[4],[35]   6.50%
Interest [2],[4],[35]   11.90%
Investment, Identifier [Axis]: Trintech, Inc., Technology, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[7],[35] 140  
Fair value at ending balance [2],[4],[7],[35]   $ 140
Interest [2],[4],[7],[35]   6.50%
Interest [2],[4],[7],[35]   11.90%
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 [1],[2],[4] 18,967  
Fair value at ending balance [1],[2],[4]   $ 18,967
Interest [1],[2],[4]   6.25%
Interest [1],[2],[4]   11.70%
Investment, Identifier [Axis]: True Religion Apparel, Inc., Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34],[36] $ 0  
Investment owned, balance (in shares) [29],[34],[36] 9.767  
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 [4],[10],[11] $ 0  
Fair value at ending balance [4],[10],[11]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[10],[11]   2.71
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Preferred Unit    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[10],[11] 0  
Fair value at ending balance [4],[10],[11]   $ 0
Investment owned, balance (in shares) [4],[6],[8],[9],[10],[11]   2.8
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, Class A LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] 1,323  
Fair value at ending balance [4]   $ 1,323
Investment owned, balance (in shares) [4],[6],[8],[9]   440.97
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 [1],[2],[4] 6,739  
Fair value at ending balance [1],[2],[4]   $ 6,739
Interest [1],[2],[4]   5.25%
Interest [1],[2],[4]   10.60%
Investment, Identifier [Axis]: Turbo Buyer, Inc., Finance Companies, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] 7,939  
Fair value at ending balance [1],[2],[4],[7]   $ 7,939
Interest [1],[2],[4],[7]   6.00%
Interest [1],[2],[4],[7]   11.50%
Investment, Identifier [Axis]: Turbo Buyer, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 7,754  
Interest [28],[29],[30] 6.00%  
Interest [28],[29],[30] 10.80%  
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 [1],[2],[4] $ 4,898  
Fair value at ending balance [1],[2],[4]   $ 4,898
Interest [1],[2],[4]   6.00%
Interest [1],[2],[4]   11.40%
Investment, Identifier [Axis]: Turnberry Solutions, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 4,874  
Interest [28],[29],[41] 5.75%  
Interest [28],[29],[41] 10.40%  
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 [2],[3],[4],[7],[53] $ 1,529  
Fair value at ending balance [2],[3],[4],[7],[53]   $ 1,529
Interest [2],[3],[4],[7],[53]   5.25%
Interest [2],[3],[4],[7],[53]   9.30%
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 [2],[3],[4],[7],[53] 0  
Fair value at ending balance [2],[3],[4],[7],[53]   $ 0
Interest [2],[3],[4],[7],[53]   5.25%
Interest [2],[3],[4],[7],[53]   9.30%
Investment, Identifier [Axis]: UBC Ledgers Holding AB, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 536  
Interest [28],[29],[33],[38] 5.25%  
Interest [28],[29],[33],[38] 9.60%  
Investment, Identifier [Axis]: UBC Ledgers Holding AB, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[52] $ 1,450  
Interest [5],[28],[29],[33],[52] 5.25%  
Interest [5],[28],[29],[33],[52] 8.40%  
Investment, Identifier [Axis]: UHY Advisors, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 12,982  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.30%  
Investment, Identifier [Axis]: UHY Advisors, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (35)  
Interest [5],[28],[29],[30] 4.75%  
Interest [5],[28],[29],[30] 9.30%  
Investment, Identifier [Axis]: UKFast Leaders Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[44] $ 11,041  
Interest [28],[29],[33],[44] 7.25%  
Interest [28],[29],[33],[44] 12.30%  
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 [2],[3],[4],[39] $ 10,762  
Fair value at ending balance [2],[3],[4],[39]   $ 10,762
Interest [2],[3],[4],[39]   4.50%
Interest [2],[3],[4],[39]   4.50%
Investment, interest rate, paid in kind [2],[3],[4],[39]   3.40%
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 12,487  
Interest [28],[29],[30] 5.75%  
Interest [28],[29],[30] 10.50%  
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 5,411  
Interest [28],[29],[30] 5.75%  
Interest [28],[29],[30] 10.50%  
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 [2],[4],[7],[35] $ 9,883  
Fair value at ending balance [2],[4],[7],[35]   $ 9,883
Interest [2],[4],[7],[35]   5.75%
Interest [2],[4],[7],[35]   11.10%
Investment, Identifier [Axis]: Union Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[46] $ 930  
Interest [5],[28],[29],[33],[46] 4.84%  
Interest [5],[28],[29],[33],[46] 9.80%  
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 [2],[3],[4],[7],[39] $ 877  
Fair value at ending balance [2],[3],[4],[7],[39]   $ 877
Interest [2],[3],[4],[7],[39]   6.00%
Interest [2],[3],[4],[7],[39]   11.40%
Investment, Identifier [Axis]: United Therapy Holding III GmbH, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 1,204  
Interest [5],[28],[29],[33],[38] 6.75%  
Interest [5],[28],[29],[33],[38] 10.00%  
Investment, Identifier [Axis]: United Therapy Holding III GmbH, Healthcare, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[7],[45] $ 1,312  
Fair value at ending balance [2],[3],[4],[7],[45]   $ 1,312
Interest [2],[3],[4],[7],[45]   5.75%
Interest [2],[3],[4],[7],[45]   9.90%
Investment, Identifier [Axis]: Unither (Uniholding), First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[33],[38] $ 1,962  
Interest [5],[28],[29],[33],[38] 4.93%  
Interest [5],[28],[29],[33],[38] 8.30%  
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 [2],[3],[4],[7],[37] $ 2,037  
Fair value at ending balance [2],[3],[4],[7],[37]   $ 2,037
Interest [2],[3],[4],[7],[37]   6.25%
Interest [2],[3],[4],[7],[37]   10.20%
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 [2],[3],[4],[37] 1,559  
Fair value at ending balance [2],[3],[4],[37]   $ 1,559
Interest [2],[3],[4],[37]   6.65%
Interest [2],[3],[4],[37]   10.10%
Investment, interest rate, paid in kind [2],[3],[4],[37]   1.80%
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 [1],[2],[3],[4] 3,353  
Fair value at ending balance [1],[2],[3],[4]   $ 3,353
Interest [1],[2],[3],[4]   6.65%
Interest [1],[2],[3],[4]   12.00%
Investment, interest rate, paid in kind [1],[2],[3],[4]   1.80%
Investment, Identifier [Axis]: Utac Ceram, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[38] $ 1,500  
Interest [28],[29],[33],[38] 4.60%  
Interest [28],[29],[33],[38] 4.90%  
Investment, interest rate, paid in kind [28],[29],[33],[38] 2.40%  
Investment, Identifier [Axis]: Utac Ceram, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 2,471  
Interest [28],[29],[30],[33] 6.75%  
Interest [28],[29],[30],[33] 9.40%  
Investment, interest rate, paid in kind [28],[29],[30],[33] 1.80%  
Investment, Identifier [Axis]: Utac Ceram, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30],[33] $ 943  
Interest [28],[29],[30],[33] 6.75%  
Interest [28],[29],[30],[33] 8.80%  
Investment, interest rate, paid in kind [28],[29],[30],[33] 2.40%  
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 [3],[10],[11] $ 91  
Fair value at ending balance [3],[10],[11]   $ 91
Investment, Identifier [Axis]: VOYA CLO 2015-2, LTD., Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [33],[34],[36] 15  
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 [3],[10],[11] 943  
Fair value at ending balance [3],[10],[11]   943
Investment, Identifier [Axis]: VOYA CLO 2016-2, LTD., Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [33],[34],[36] 1,072  
Investment, Identifier [Axis]: Validity, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 4,783  
Interest [28],[29],[41] 5.25%  
Interest [28],[29],[41] 9.90%  
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 [2],[4],[35] $ 4,783  
Fair value at ending balance [2],[4],[35]   $ 4,783
Interest [2],[4],[35]   5.25%
Interest [2],[4],[35]   10.70%
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 [4],[10],[11] 2  
Fair value at ending balance [4],[10],[11]   $ 2
Investment owned, balance (in shares) [4],[6],[8],[9],[10],[11]   4,676
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[10],[11] 3  
Fair value at ending balance [4],[10],[11]   $ 3
Investment owned, balance (in shares) [4],[6],[8],[9],[10],[11]   5,591
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34],[36] $ 2  
Investment owned, balance (in shares) [29],[34],[36] 4,676  
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34],[36] $ 3  
Investment owned, balance (in shares) [29],[34],[36] 5,591  
Investment, Identifier [Axis]: Victoria Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46] $ 3,787  
Interest [28],[29],[33],[46] 6.50%  
Interest [28],[29],[33],[46] 11.70%  
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 [2],[3],[4],[39] $ 3,573  
Fair value at ending balance [2],[3],[4],[39]   $ 3,573
Interest [2],[3],[4],[39]   6.50%
Interest [2],[3],[4],[39]   11.40%
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 [1],[2],[10] 5,908  
Fair value at ending balance [1],[2],[10]   $ 5,908
Interest [1],[2],[10]   7.25%
Interest [1],[2],[10]   12.90%
Investment, Identifier [Axis]: Vision Solutions Inc., Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[30],[36] $ 6,256  
Interest [28],[30],[36] 7.25%  
Interest [28],[30],[36] 12.10%  
Investment, Identifier [Axis]: Vista Global Holding Ltd, Structured Secured Note - Class C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 495  
Interest [29],[33] 9.50%  
Investment, Identifier [Axis]: VistaJet Pass Through Trust 2021-1B, Airlines, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] $ 3,262  
Fair value at ending balance [4]   $ 3,262
Interest [4]   6.30%
Investment, Identifier [Axis]: VistaJet Pass Through Trust 2021-1B, Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 3,160  
Interest [29] 6.30%  
Investment, Identifier [Axis]: Vital Buyer, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 7,241  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.00%  
Investment, Identifier [Axis]: Vital Buyer, LLC, Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 388  
Investment owned, balance (in shares) [29] 16,442.9  
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 [1],[2],[4] $ 7,526  
Fair value at ending balance [1],[2],[4]   $ 7,526
Interest [1],[2],[4]   5.50%
Interest [1],[2],[4]   10.90%
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 [4],[11] 434  
Fair value at ending balance [4],[11]   $ 434
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   16,442.9
Investment, Identifier [Axis]: W2O Holdings, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 11,772  
Interest [28],[29],[30] 4.75%  
Interest [28],[29],[30] 9.30%  
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 [1],[4] $ 5,785  
Fair value at ending balance [1],[4]   $ 5,785
Interest [1],[4]   5.25%
Interest [1],[4]   10.60%
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 2,502  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.70%  
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 5,959  
Interest [28],[29],[30] 5.00%  
Interest [28],[29],[30] 9.70%  
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC, First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 1,816  
Interest [5],[28],[29],[30] 5.00%  
Interest [5],[28],[29],[30] 9.70%  
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 [1],[2],[4],[7] $ 2,403  
Fair value at ending balance [1],[2],[4],[7]   $ 2,403
Interest [1],[2],[4],[7]   6.25%
Interest [1],[2],[4],[7]   11.70%
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 [2],[4] 12,346  
Fair value at ending balance [2],[4]   $ 12,346
Interest [2],[4]   5.75%
Interest [2],[4]   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 [2],[4],[7] 466  
Fair value at ending balance [2],[4],[7]   $ 466
Interest [2],[4],[7]   5.75%
Interest [2],[4],[7]   11.10%
Investment, Identifier [Axis]: WWEC Holdings III Corp, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 12,050  
Interest [28],[29],[30] 5.75%  
Interest [28],[29],[30] 10.40%  
Investment, Identifier [Axis]: WWEC Holdings III Corp, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (35)  
Interest [5],[28],[29],[30] 5.75%  
Interest [5],[28],[29],[30] 10.40%  
Investment, Identifier [Axis]: Waccamaw River LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [33],[67] $ 10,730  
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 [3],[11] 15,470  
Fair value at ending balance [3],[11]   $ 15,470
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 0 [12] 2,480 [13]
Gross Reductions (2,087) [14] 0 [15]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (2,653) (7,222)
Fair value at ending balance 10,730 15,470
Amount of Interest or Dividends Credited to Income 3,535 [16] 1,460 [17]
Investment, Identifier [Axis]: Watermill-QMC Midco, Inc., Automotive    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[10],[11] 0  
Fair value at ending balance [4],[10],[11]   0
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 [4] 9,884  
Fair value at ending balance [4]   $ 9,884
Interest [4]   12.00%
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 [1],[2],[4],[7] 8,345  
Fair value at ending balance [1],[2],[4],[7]   $ 8,345
Interest [1],[2],[4],[7]   7.00%
Interest [1],[2],[4],[7]   12.30%
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 [4],[11] 804  
Fair value at ending balance [4],[11]   $ 804
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   63,087.1
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 [1],[2],[4],[7] 67  
Fair value at ending balance [1],[2],[4],[7]   $ 67
Interest [1],[2],[4],[7]   7.00%
Interest [1],[2],[4],[7]   12.30%
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 1,802  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.60%  
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ (36)  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.60%  
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 8,525  
Interest [28],[29],[41] 6.50%  
Interest [28],[29],[41] 11.10%  
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 975  
Investment owned, balance (in shares) [29],[34] 63,087.1  
Investment, Identifier [Axis]: Whitcraft Holdings, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 993  
Interest [5],[28],[29],[41] 6.50%  
Interest [5],[28],[29],[41] 11.10%  
Investment, Identifier [Axis]: White Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30],[33] $ 1,747  
Interest [5],[28],[29],[30],[33] 5.50%  
Interest [5],[28],[29],[30],[33] 10.20%  
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 [1],[2],[3],[4],[7] $ 1,687  
Fair value at ending balance [1],[2],[3],[4],[7]   $ 1,687
Interest [1],[2],[3],[4],[7]   6.00%
Interest [1],[2],[3],[4],[7]   11.40%
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 [1],[2],[10] 47  
Fair value at ending balance [1],[2],[10]   $ 47
Interest [1],[2],[10]   6.25%
Interest [1],[2],[10]   11.80%
Investment, Identifier [Axis]: Woodland Foods, LLC, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 1,271  
Investment owned, balance (in shares) [29],[34] 1,663.3  
Investment, Identifier [Axis]: Woodland Foods, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 6,097  
Interest [28],[29],[30] 5.25%  
Interest [28],[29],[30] 9.90%  
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 [4],[11] $ 1,012  
Fair value at ending balance [4],[11]   $ 1,012
Investment owned, balance (in shares) [4],[6],[8],[9],[11]   1,663.3
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 [1],[2],[4] 4,946  
Fair value at ending balance [1],[2],[4]   $ 4,946
Interest [1],[2],[4]   5.75%
Interest [1],[2],[4]   11.40%
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 [1],[2],[4],[7] 1,378  
Fair value at ending balance [1],[2],[4],[7]   $ 1,378
Interest [1],[2],[4],[7]   5.75%
Interest [1],[2],[4],[7]   11.40%
Investment, Identifier [Axis]: Woodland Foods, LLC, Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29] $ 427  
Investment owned, balance (in shares) [29] 364.00  
Investment, interest rate, paid in kind 20.00%  
Investment, Identifier [Axis]: Woodland Foods, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 1,043  
Interest [5],[28],[29],[30] 5.25%  
Interest [5],[28],[29],[30] 9.90%  
Investment, Identifier [Axis]: World 50, Inc., First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 13,785  
Interest [28],[29],[41] 5.75%  
Interest [28],[29],[41] 10.30%  
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 [1],[2],[4] $ 2,414  
Fair value at ending balance [1],[2],[4]   $ 2,414
Interest [1],[2],[4]   4.50%
Interest [1],[2],[4]   10.10%
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 [1],[2],[4] 8,760  
Fair value at ending balance [1],[2],[4]   $ 8,760
Interest [1],[2],[4]   4.50%
Interest [1],[2],[4]   10.10%
Investment, Identifier [Axis]: World 50, Inc., Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ (8)  
Interest [5],[28],[29],[41] 5.75%  
Interest [5],[28],[29],[41] 10.30%  
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33],[34] $ 572  
Investment owned, balance (in shares) [29],[33],[34] 45,665,825  
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 [3],[4],[11] $ 582  
Fair value at ending balance [3],[4],[11]   $ 582
Investment owned, balance (in shares) [3],[4],[6],[8],[9],[11]   45,665,825
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[3],[4],[7],[39] 6,448  
Fair value at ending balance [2],[3],[4],[7],[39]   $ 6,448
Interest [2],[3],[4],[7],[39]   5.25%
Interest [2],[3],[4],[7],[39]   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 [3],[4] 3,241  
Fair value at ending balance [3],[4]   $ 3,241
Investment, interest rate, paid in kind [3],[4]   11.00%
Investment, Identifier [Axis]: Xeinadin Bidco Limited, First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[42] $ 283  
Interest [28],[29],[33],[42] 5.25%  
Interest [28],[29],[33],[42] 8.20%  
Investment, Identifier [Axis]: Xeinadin Bidco Limited, First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46] $ 8,598  
Interest [28],[29],[33],[46] 5.25%  
Interest [28],[29],[33],[46] 10.00%  
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[33] $ 3,691  
Investment, interest rate, paid in kind [29],[33] 11.00%  
Investment, Identifier [Axis]: ZB Holdco LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[30] $ 9,053  
Interest [28],[29],[30] 5.50%  
Interest [28],[29],[30] 10.30%  
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 [1],[2],[4],[7] $ 6,271  
Fair value at ending balance [1],[2],[4],[7]   $ 6,271
Interest [1],[2],[4],[7]   6.00%
Interest [1],[2],[4],[7]   11.50%
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4] 172  
Fair value at ending balance [4]   $ 172
Investment owned, balance (in shares) [4],[6],[8],[9]   152.69
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [1],[2],[4],[7] (6)  
Fair value at ending balance [1],[2],[4],[7]   $ (6)
Interest [1],[2],[4],[7]   6.00%
Interest [1],[2],[4],[7]   11.50%
Investment, Identifier [Axis]: ZB Holdco LLC, LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [29],[34] $ 197  
Investment owned, balance (in shares) [29],[34] 152.69  
Investment, Identifier [Axis]: ZB Holdco LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[30] $ 495  
Interest [5],[28],[29],[30] 5.50%  
Interest [5],[28],[29],[30] 10.30%  
Investment, Identifier [Axis]: Zeppelin Bidco Limited, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[33],[46] $ 4,691  
Interest [28],[29],[33],[46] 6.25%  
Interest [28],[29],[33],[46] 11.20%  
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 [2],[3],[4],[7],[39] $ 5,718  
Fair value at ending balance [2],[3],[4],[7],[39]   $ 5,718
Interest [2],[3],[4],[7],[39]   6.00%
Interest [2],[3],[4],[7],[39]   11.40%
Investment, Identifier [Axis]: eShipping, LLC, First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [28],[29],[41] $ 3,465  
Interest [28],[29],[41] 5.00%  
Interest [28],[29],[41] 9.70%  
Investment, Identifier [Axis]: eShipping, LLC, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [5],[28],[29],[41] $ 0  
Interest [5],[28],[29],[41] 5.00%  
Interest [5],[28],[29],[41] 9.70%  
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 [2],[4],[35] $ 3,473  
Fair value at ending balance [2],[4],[35]   $ 3,473
Interest [2],[4],[35]   5.00%
Interest [2],[4],[35]   10.50%
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [2],[4],[7],[35] $ 0  
Fair value at ending balance [2],[4],[7],[35]   $ 0
Interest [2],[4],[7],[35]   5.00%
Interest [2],[4],[7],[35]   10.50%
[1] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2023 was 5.33140%.
[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 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).
[4] The fair value of the investment was determined using significant unobservable inputs.
[5] Position or portion thereof is an unfunded loan or equity commitment.
[6] 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 4 93,038 4 8 
Equity shares320,335 13 374,704 15 31 
Equity warrants76 — 2,392 — — 
Investments in joint ventures / PE fund145,648 6 110,066 4 9 
$2,535,576 100 %$2,488,715 100 %208 %
[7] Position or portion thereof is an unfunded loan or equity commitment.
[8] 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, Canadian Dollar Offer Rate (“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 resets 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.
[9] 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.
[10] 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.
[11] Investment is non-income producing.
[12] 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.
[13] 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.
[14] Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
[15] Gross reductions include decreases in the cost basis of investments resulting from principal repayments, sales and return of capital.
[16] 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.
[17] 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
[18] The fair value of the investment was determined using significant unobservable inputs.
[19] 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.
[20] 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.
[21] Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
[22] Gross reductions include decreases in the cost basis of investments resulting from principal repayments, sales and return of capital.
[23] 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.
[24] 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.
[25] The fair value of the investment was determined using significant unobservable inputs.
[26] The fair value of the investment was determined using significant unobservable inputs.
[27] The fair value of the investment was determined using significant unobservable inputs.
[28] Debt investment includes interest rate floor feature.
[29] The fair value of the investment was determined using significant unobservable inputs.
[30] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2024 was 4.30510%
[31] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2024 was 4.25001%
[32] PIK non-accrual investment.
[33] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 26.1% of total investments at fair value as of December 31, 2024. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. If at any time qualifying assets do not represent at least 70% of the Company’s total assets, the Company will be precluded from acquiring any additional non-qualifying asset until such time as it complies with the requirements of Section 55(a).
[34] Investment is non-income producing
[35] The interest rate on these loans is subject to 1 Month SOFR, which as of December 31, 2023 was 5.35472%.
[36] 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.
[37] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2023 was 3.90900%
[38] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2024 was 2.71400%.
[39] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2023 was 5.20530%
[40] The interest rate on these loans is subject to 6 Month BBSY, which as of December 31, 2024 was 4.49250%
[41] The interest rate on these loans is subject to 1 Month SOFR, which as of December 31, 2024 was 4.33249%.
[42] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2024 was 2.56800%
[43] Non-accrual investment.
[44] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2024 was 4.62330%.
[45] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2023 was 3.86100%
[46] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2024 was 4.56370%.
[47] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2023 was 5.13220%.
[48] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2024 was 4.41630%
[49] The interest rate on these loans is subject to 6 Month BBSY, which as of December 31, 2023 was 4.44500%.
[50] The interest rate on these loans is subject to 1 Month CDOR, which as of December 31, 2023 was 5.45500%
[51] The interest rate on these loans is subject to 1 Month EURIBOR, which as of December 31, 2024 was 2.84500%.
[52] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2024 was 2.54200%.
[53] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2023 was 4.05200%
[54] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2023 was 5.15772%
[55] The interest rate on these loans is subject to 1 Month SONIA, which as of December 31, 2023 was 5.19920%.
[56] Non-accrual investment.
[57] As defined in the 1940 Act, the Company is deemed to be both an “affiliated person” and “control” the portfolio company because it owns more than 25% of the portfolio company’s outstanding voting securities or it has the power to exercise control over the management or policies of such portfolio company (including through a management agreement). Transactions as of and during the year ended December 31, 2024 in which the portfolio company is deemed to be a “Control Investment” of the Company were as follows:
December 31, 2023
Value		Gross Additions
(a)		Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31, 2024
 Value		Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Black Angus Steakhouses, LLC(d)
First Lien Senior Secured Term Loan (14.4% PIK)(e)
$7,166 $1,114 $— $— $(5,536)$2,744 $1,028 
First Lien Senior Secured Term Loan (10.0% PIK)(e)
4,869 — — — (4,869)— — 
LLC Units (44.6 units)
— — — — — — — 
12,035 1,114 — — (10,405)2,744 1,028 
MVC Automotive Group GmbH(d)
Bridge Loan (4.5% Cash, 1.5% PIK)
9,762 720 (9,620)(862)— — 495 
Common Equity Interest (18,000 Shares)
15,430 9,620 — — (11,309)13,741 — 
25,192 10,340 (9,620)(862)(11,309)13,741 495 
MVC Private Equity Fund LP
General Partnership Interest
(1,831.4 units)
24 — (17)— (7)— 48 
Limited Partnership Interest
(71,790.4 units)
981 — (678)— (292)11 — 
1,005 — (695)— (299)11 48 
Security Holdings B.V(d)
Bridge Loan (5.0% PIK)
6,328 327 — — — 6,655 326 
Revolver (6.0% Cash)
3,866 1,828 (12)17 (366)5,333 188 
Senior Subordinated Term Loan (3.1% PIK)
10,867 324 — — — 11,191 273 
Senior Unsecured Term Loan (6.0% Cash, 9.0% PIK)
2,236 208 — — (151)2,293 255 
Common Stock Series A (17,100 shares)
311 — — — 88 399 — 
Common Stock Series B (1,236 shares)
29,080 — — — 8,216 37,296 — 
52,688 2,687 (12)17 7,787 63,167 1,042 
Total Control Investments$90,920 $14,141 $(10,327)$(845)$(14,226)$79,663 $2,613 
[58] Non-accrual investment.
[59] The interest rate on these loans is subject to 1 Month SONIA, which as of December 31, 2024 was 4.71030%.
[60] The interest rate on these loans is subject to 3 Month CORRA, which as of December 31, 2024 was 3.15158%
[61] The interest rate on these loans is subject to 3 Month CDOR, which as of December 31, 2023 was 5.44750%
[62] The interest rate on these loans is subject to 3 Month BKBM, which as of December 31, 2024 was 4.27000%
[63] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2023 was 4.35750%
[64] The interest rate on these loans is subject to 3 Month BKBM, which as of December 31, 2023 was 5.63000%
[65] The interest rate on these loans is subject to 6 Month SARON, which as of December 31, 2023 was 1.69524%
[66] The interest rate on these loans is subject to 6 Month SARON, which as of December 31, 2024 was 1.01720%
[67] Portfolio company does not issue shares or units, member interest is based on commitments.
[68] 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.
[69] 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.
[70] The interest rate on these loans is subject to 1 Month NIBOR, which as of December 31, 2024 was 4.61000%.
[71] The interest rate on these loans is subject to 1 Month NIBOR, which as of December 31, 2023 was 4.59000%
[72] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2024 was 4.32250%
[73] The interest rate on these loans is subject to 1 Month EURIBOR, which as of December 31, 2023 was 3.84500%
[74] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2023 was 4.31000%