Quarterly report pursuant to Section 13 or 15(d)

Consolidated Schedule of Investments In and Advances to Affiliates (Details)

v3.23.1
Consolidated Schedule of Investments In and Advances to Affiliates (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ (28,379) $ 3,336  
Amount of Unrealized Gain/(Loss) 35,118 14,752  
Control investments      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) (2,966) 0  
Amount of Unrealized Gain/(Loss) 17,161 8,279  
Amount of Interest, Fees or Dividends Credited to Income 48,862 32,577  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,703,172 1,489,257  
Gross Additions 83,687 122,644  
Gross Reductions 55,770 119,115  
Ending balance 1,746,003 1,486,663  
Control investments | Midwest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance $ 444,151 $ 338,390  
Net assets, percentage 25.40% 22.80%  
Control investments | Northeast      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance   $ 134,636  
Net assets, percentage   9.10%  
Control investments | Southeast      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance $ 49,003 $ 18,443  
Net assets, percentage 2.80% 1.20%  
Control investments | Southwest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance $ 639,016 $ 587,631  
Net assets, percentage 36.60% 39.50%  
Control investments | West      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance $ 450,653 $ 407,563  
Net assets, percentage 25.80% 27.40%  
Control investments | Northeast Region and Canada      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance $ 163,180    
Net assets, percentage 9.30%    
Affiliate investments      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ (26,264) $ 692  
Amount of Unrealized Gain/(Loss) 33,141 3,041  
Amount of Interest, Fees or Dividends Credited to Income 17,456 13,917  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 618,359 549,214  
Gross Additions 81,567 13,981  
Gross Reductions 58,785 9,879  
Ending balance 626,227 559,439  
Affiliate investments | Midwest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance $ 77,468 $ 69,637  
Net assets, percentage 12.40% 12.40%  
Affiliate investments | Northeast      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance   $ 100,269  
Net assets, percentage   17.90%  
Affiliate investments | Southeast      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance $ 200,667 $ 165,903  
Net assets, percentage 32.00% 29.70%  
Affiliate investments | Southwest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance $ 84,732 $ 107,324  
Net assets, percentage 13.50% 19.20%  
Affiliate investments | West      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance $ 153,817 $ 116,306  
Net assets, percentage 24.60% 20.80%  
Affiliate investments | Northeast Region and Canada      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Ending balance $ 109,543    
Net assets, percentage 17.50%    
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 HPP-MS, L.P.)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 248 0  
Gross Additions 0 244  
Gross Reductions 0 0  
Ending balance 248 244  
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 MH, L.P.)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 631 0  
Amount of Unrealized Gain/(Loss) (675) 189  
Amount of Interest, Fees or Dividends Credited to Income 141 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,552 3,971  
Gross Additions 1,031 346  
Gross Reductions 1,574 0  
Ending balance 7,009 4,317  
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 2,079  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 0 $ 2,079  
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   18.00% 18.00% [1]
PIK Rate   8.00% 18.00% [1]
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   30  
Amount of Interest, Fees or Dividends Credited to Income   478  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   9,794  
Gross Additions   250  
Gross Reductions   0  
Ending balance   10,044  
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [2] 18.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (6)    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 315    
Gross Reductions 6    
Ending balance $ 309    
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate [2] 18.00%    
PIK Rate [2] 18.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (268)    
Amount of Interest, Fees or Dividends Credited to Income 572    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 11,550    
Gross Additions 572    
Gross Reductions 267    
Ending balance 11,855    
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 1,940  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 0 1,940  
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [3],[4] 13.00%    
Spread 5.00% [3],[4]   6.00% [5],[6],[7],[8]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.80% [3],[4],[9],[10]   10.20% [5],[6],[7]
Spread 6.00% [3],[4],[9],[10]   6.00% [5],[6],[7]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 10.79% [3],[4],[9]   10.58% [5],[6],[7]
Spread 6.00% [3],[4],[9]   6.00% [5],[6],[7]
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.59% [2],[4]   10.14% [1],[7]
Spread 5.75% [2],[4]   5.75% [1],[7]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 0 610  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 9,400 7,740  
Gross Additions 0 610  
Gross Reductions 0 0  
Ending balance $ 9,400 $ 8,350  
Investment, Identifier [Axis]: AFG Capital Group, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   10.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   2  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   144  
Gross Additions   0  
Gross Reductions   86  
Ending balance   58  
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 7.40% [3],[4],[9],[11]   7.40% [5],[6],[7],[8]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.10% [3],[4],[9]   11.72% [5],[6],[7]
Spread 7.40% [3],[4],[9]   7.40% [5],[6],[7]
Investment, Identifier [Axis]: ASC Interests, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) (100) 80  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 800 720  
Gross Additions 0 80  
Gross Reductions 100 0  
Ending balance $ 700 $ 800  
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 13.00% 13.00% 13.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 13 7  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 400 200  
Gross Additions 0 0  
Gross Reductions 0 30  
Ending balance $ 400 $ 170  
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.00% 13.00% 13.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 54 59  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,649 1,636  
Gross Additions 0 6  
Gross Reductions 0 0  
Ending balance $ 1,649 1,642  
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   (576)  
Amount of Interest, Fees or Dividends Credited to Income   0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   4,894  
Gross Additions   0  
Gross Reductions   576  
Ending balance   $ 4,318  
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units 1      
Schedule of Investments [Line Items]      
Total Rate 14.13%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance 0    
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units 2      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 84    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,504    
Gross Additions 84    
Gross Reductions 0    
Ending balance $ 3,588    
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.00%  
Spread   10.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   170  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   4,736  
Gross Additions   23  
Gross Reductions   70  
Ending balance   $ 4,689  
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 10.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance (3)    
Gross Additions 1    
Gross Reductions 0    
Ending balance $ (2)    
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.75%    
Spread 10.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 188    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,545    
Gross Additions 20    
Gross Reductions 70    
Ending balance 4,495    
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Warrants      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [3],[4] 11.39%    
Spread 6.50% [3],[4],[9]   5.50% [5],[6],[7],[8]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.09% [3],[4],[9]   9.32% [5],[6],[7]
Spread 5.50% [3],[4],[9]   5.50% [5],[6],[7]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 12.09% [3],[4],[9]   11.32% [5],[6],[7]
Spread 7.50% [3],[4],[9]   7.50% [5],[6],[7]
Investment, Identifier [Axis]: ATS Workholding, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   5.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   3,005  
Gross Additions   0  
Gross Reductions   0  
Ending balance   $ 3,005  
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 5.00% [3],[12]   5.00% [5],[13]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (132)    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 634    
Gross Additions 21    
Gross Reductions 132    
Ending balance $ 523    
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 5.00% [3],[12]   5.00% [5],[13]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (186)    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,005    
Gross Additions 0    
Gross Reductions 185    
Ending balance 820    
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 3,248    
Amount of Unrealized Gain/(Loss) (3,270)    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,270    
Gross Additions 3,248    
Gross Reductions 6,518    
Ending balance $ 0    
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   8.50% 12.23% [1],[7]
Spread 7.50% 7.50% 7.50% [1],[7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (134) 230  
Amount of Interest, Fees or Dividends Credited to Income 886 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 6,343 7,092  
Gross Additions 575 230  
Gross Reductions 6,918 0  
Ending balance $ 0 $ 7,322  
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt      
Schedule of Investments [Line Items]      
Total Rate   10.00% 10.00% [1]
PIK Rate 10.00% 10.00% 10.00% [1]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (306) 82  
Amount of Interest, Fees or Dividends Credited to Income 1,160 77  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,598 1,963  
Gross Additions 1,160 159  
Gross Reductions 3,758 0  
Ending balance $ 0 2,122  
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [3],[4],[9] 12.52%    
Spread 7.75% [3],[4],[9]   7.25% [5],[6],[7],[8]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.61% [3],[4],[9]   12.17% [5],[6],[7]
Spread 7.75% [3],[4],[9]   7.25% [5],[6],[7]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 15.50% [3],[4]   13.23% [5],[7]
Spread 7.50% [3],[4]   8.50% [5],[7]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 15.50% [3],[4]   13.23% [5],[7]
Spread 7.50% [3],[4]   8.50% [5],[7]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 19.50% [3],[4]   16.17% [5],[7]
Spread 11.50% [3],[4]   12.50% [5],[7]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 14.13% [3],[4]   13.88% [5],[7]
Spread 9.50% [3],[4]   9.50% [5],[7]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.13% [3],[4]   13.57% [5],[7]
Spread 9.50% [3],[4]   9.00% [5],[7]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate [3],[4] 14.13%    
Spread [3],[4] 9.50%    
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.00% [3],[4],[14]   10.00% [5],[7],[15]
Spread 6.50% [3],[4],[14]   6.00% [5],[7],[15]
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.00% [3],[4],[16]   10.00% [5],[7],[15]
Spread 7.50% [3],[4],[16]   7.50% [5],[7],[15]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.00% [3],[4],[11]   6.00% [5],[7],[8]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.12% [3],[4]   11.12% [5],[7]
Spread 6.00% [3],[4]   6.00% [5],[7]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.49% [3],[4],[9]   10.46% [5],[6],[7]
Spread 6.75% [3],[4],[9]   6.75% [5],[6],[7]
PIK Rate [3],[4],[9] 1.00%    
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.49% [3],[4],[9]   12.46% [5],[6],[7]
Spread 8.75% [3],[4],[9]   8.75% [5],[6],[7]
PIK Rate [3],[4],[9] 1.00%    
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 7.50% [2],[12]   7.50% [1],[13]
Spread 6.50% [2],[12]   6.50% [1],[13]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 7.50% [2],[4],[12]   7.50% [1],[7],[13]
Spread 6.50% [2],[4],[12]   6.50% [1],[7],[13]
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Affiliate Investments      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   (6,123)  
Gross Additions   0  
Gross Reductions   0  
Ending balance   0  
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Control Investments      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income (171)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance (14,914)    
Gross Additions 0    
Gross Reductions 0    
Ending balance 0    
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Affiliate Investments      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 171    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 14,914    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Control Investments      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   (236)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   6,123  
Gross Additions   0  
Gross Reductions   0  
Ending balance   0  
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1      
Schedule of Investments [Line Items]      
Total Rate 14.13%   14.13%
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 10.00% [4],[11]   10.00% [7],[8]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.75% [4]   14.13% [7]
Spread 10.00% [4]   10.00% [7]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 14.83% [3],[4],[9]   13.41% [5],[7]
Spread 7.00% [3],[4],[9]   9.00% [5],[7]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.83% [3],[4],[9]   13.56% [5],[7]
Spread 7.00% [3],[4],[9]   9.00% [5],[7]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.00% [3],[4],[9],[11]   6.50% [5],[6],[7],[8]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.72% [3],[4],[9]   10.92% [5],[6],[7]
Spread 6.00% [3],[4],[9]   6.50% [5],[6],[7]
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.15% [3],[4],[17]   10.36% [5],[6],[7],[18]
Spread 5.40% [3],[4],[17]   6.60% [5],[6],[7],[18]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 0  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 0 0  
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)      
Schedule of Investments [Line Items]      
Total Rate 15.00%   15.00%
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 0  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 0 $ 0  
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.00%  
Spread   11.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (209)  
Amount of Interest, Fees or Dividends Credited to Income   144  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   2,507  
Gross Additions   0  
Gross Reductions   209  
Ending balance   2,298  
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 15.66% [4],[19]   15.12% [7],[20]
Spread 11.00% [4],[19]   11.00% [7],[20]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 31    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 800    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 800    
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 15.66% [4],[19]   15.12% [7],[20]
Spread 11.00% [4],[19]   11.00% [7],[20]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 155    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,086    
Gross Additions 0    
Gross Reductions 0    
Ending balance 2,086    
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (280) 120  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,320 1,930  
Gross Additions 0 120  
Gross Reductions 283 0  
Ending balance $ 3,037 $ 2,050  
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 7.00% [3] 7.00% 7.00% [5]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 30 12  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 711 711  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance 711 711  
Investment, Identifier [Axis]: Batjer TopCo, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   0  
Gross Additions   4,073  
Gross Reductions   0  
Ending balance   $ 4,073  
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 2,055    
Amount of Interest, Fees or Dividends Credited to Income 167    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,095    
Gross Additions 2,055    
Gross Reductions 0    
Ending balance 6,150    
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   11.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   196  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   0  
Gross Additions   10,917  
Gross Reductions   0  
Ending balance   10,917  
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance (8)    
Gross Additions 1    
Gross Reductions 0    
Ending balance $ (7)    
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 11.00%   11.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 311    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 10,933    
Gross Additions 9    
Gross Reductions 450    
Ending balance $ 10,492    
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1      
Schedule of Investments [Line Items]      
Total Rate 8.00% [3],[21],[22]   8.00% [5],[23],[24]
PIK Rate 8.00% [3],[21],[22]   8.00% [5],[23],[24]
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2      
Schedule of Investments [Line Items]      
PIK Rate 16.00% [3],[11],[21],[22]   16.00% [5],[8],[23],[24]
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 12.00% [3]   12.00% [5]
PIK Rate 1.50% [3]   1.50% [5]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 7.00% [3],[4],[9],[11]   1.00% [5],[6],[7],[8]
PIK Rate 6.00% [3],[4],[9],[11]   6.00% [5],[6],[7],[8]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.89% [3],[4],[9]   11.40% [5],[6],[7]
Spread 7.00% [3],[4],[9]   1.00% [5],[6],[7]
PIK Rate 6.00% [3],[4],[9]   6.00% [5],[6],[7]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [2],[4] 15.50%    
Spread 7.50% [2],[4]   8.50% [1],[7],[8]
PIK Rate [2],[4] 14.50%    
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.07% [2],[4]   12.94% [1],[7]
Spread 8.50% [2],[4]   8.50% [1],[7]
PIK Rate [2],[4] 12.07%    
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) (200) 0  
Amount of Interest, Fees or Dividends Credited to Income 29 40  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,970 4,830  
Gross Additions 0 0  
Gross Reductions 200 0  
Ending balance $ 2,770 $ 4,830  
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.00% 10.00% 10.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 8 8  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 320 320  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 320 320  
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class A Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   292  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   10,194  
Gross Additions   0  
Gross Reductions   10,194  
Ending balance   0  
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units      
Schedule of Investments [Line Items]      
Total Rate 8.00% [21]   8.00% [23]
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 0 2,760  
Amount of Interest, Fees or Dividends Credited to Income 1,096 368  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 31,420 23,170  
Gross Additions 0 2,760  
Gross Reductions 0 0  
Ending balance $ 31,420 $ 25,930  
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.91% [4],[9],[25] 10.50% 13.39% [6],[7],[26]
Spread 9.22% [4],[9],[25] 9.00% 9.26% [6],[7],[26]
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (20)  
Amount of Interest, Fees or Dividends Credited to Income   1,160  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   39,000  
Gross Additions   10,214  
Gross Reductions   20  
Ending balance   49,194  
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.91%    
Spread 9.22%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (36)    
Amount of Interest, Fees or Dividends Credited to Income 3,431    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 99,194    
Gross Additions 36    
Gross Reductions 695    
Ending balance $ 98,535    
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.50% [4],[12],[19]   12.50% [5],[7],[13],[20]
Spread 9.25% [4],[12],[19]   9.25% [5],[7],[13],[20]
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.50% [4],[12],[19]   12.50% [5],[7],[13],[20]
Spread 9.25% [4],[12],[19]   9.25% [5],[7],[13],[20]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) (520) 70  
Amount of Interest, Fees or Dividends Credited to Income 30 265  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,080 7,710  
Gross Additions 0 70  
Gross Reductions 520 0  
Ending balance $ 6,560 $ 7,780  
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 14.66% [4] 11.00% 14.12% [7]
Spread 10.00% [4] 10.00% 10.00% [7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 212 224  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 5,964 8,037  
Gross Additions 0 6  
Gross Reductions 124 124  
Ending balance 5,840 7,919  
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 25 25  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,000 1,000  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 1,000 $ 1,000  
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 13.00% 13.00% 13.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 286 286  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 8,813 8,813  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 8,813 $ 8,813  
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.00% [22] 13.00% 13.00% [24]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 32 33  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,000 1,000  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance 1,000 1,000  
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   200  
Amount of Interest, Fees or Dividends Credited to Income   0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   4,060  
Gross Additions   200  
Gross Reductions   0  
Ending balance   4,260  
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,828    
Gross Additions 0    
Gross Reductions 0    
Ending balance 1,828    
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 2      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,512    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 2,512    
Investment, Identifier [Axis]: Brightwood Capital Fund Investments - Fund V, LP Interests (Brightwood Capital Fund V, LP)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   139  
Amount of Interest, Fees or Dividends Credited to Income   0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   1,000  
Gross Additions   639  
Gross Reductions   0  
Ending balance   $ 1,639  
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Total Rate 6.00%   6.00%
PIK Rate 6.00%   6.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 12.00% 12.25% 9.00%
Spread   11.25%  
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 521 540  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 12,337 14,370  
Gross Additions 0 0  
Gross Reductions 375 0  
Ending balance $ 11,962 14,370  
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [3],[4] 9.83%    
Spread 5.00% [3],[4]   5.00% [5],[7],[8]
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 9.63% [3],[4]   8.91% [5],[7]
Spread 5.00% [3],[4]   5.00% [5],[7]
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 860 (1,740)  
Amount of Interest, Fees or Dividends Credited to Income 1,235 412  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 49,002 50,620  
Gross Additions 858 0  
Gross Reductions 0 1,740  
Ending balance 49,860 48,880  
Investment, Identifier [Axis]: CMS Minerals Investments, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (431) 192  
Amount of Interest, Fees or Dividends Credited to Income 44 43  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,670 1,974  
Gross Additions 0 192  
Gross Reductions 435 109  
Ending balance $ 1,235 2,057  
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate [5],[7],[27]     11.99%
Spread [5],[7],[27]     8.50%
PIK Rate [5],[7],[27]     0.01%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [3],[4] 13.14%    
Spread [3],[4] 6.50%    
PIK Rate [3],[4] 2.00%    
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate [3],[4] 13.14%    
Spread [3],[4] 6.50%    
PIK Rate [3],[4] 2.00%    
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate [3],[4] 13.33%    
Spread [3],[4] 6.50%    
PIK Rate [3],[4] 2.00%    
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 4      
Schedule of Investments [Line Items]      
Total Rate [3],[4] 13.23%    
Spread [3],[4] 6.50%    
PIK Rate [3],[4] 2.00%    
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 5      
Schedule of Investments [Line Items]      
Total Rate [3],[4] 13.33%    
Spread [3],[4] 6.50%    
PIK Rate [3],[4] 2.00%    
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) (370) 60  
Amount of Interest, Fees or Dividends Credited to Income 16 52  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,210 2,570  
Gross Additions 0 60  
Gross Reductions 370 0  
Ending balance 1,840 2,630  
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 63 357  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 25,495 9,510  
Gross Additions 0 357  
Gross Reductions 0 0  
Ending balance $ 25,495 9,867  
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2      
Schedule of Investments [Line Items]      
Total Rate 15.00% [21]   15.00% [23]
PIK Rate 15.00% [21]   15.00% [23]
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 0 3,990  
Amount of Interest, Fees or Dividends Credited to Income 150 63  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,994 13,275  
Gross Additions 150 3,990  
Gross Reductions 0 0  
Ending balance $ 4,144 $ 17,265  
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 14.88% [4] 11.00% 13.75% [7]
Spread 10.00% [4] 10.00% 10.00% [7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (3) 0  
Amount of Interest, Fees or Dividends Credited to Income 1,045 787  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 28,000 27,915  
Gross Additions 3 17  
Gross Reductions 3 0  
Ending balance $ 28,000 27,932  
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 11.34% [2],[4],[9]   10.88% [1],[7]
Spread 6.50% [2],[4],[9]   6.50% [1],[7]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Class A Common Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   4,499  
Gross Additions   0  
Gross Reductions   0  
Ending balance   $ 4,499  
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,500    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 4,500    
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.50%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   645  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   20,050  
Gross Additions   10  
Gross Reductions   0  
Ending balance   20,060  
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.00% [4],[11]   6.00% [7],[8]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance (9)    
Gross Additions 1    
Gross Reductions 1    
Ending balance $ (9)    
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.50%   12.50%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 643    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 20,090    
Gross Additions 10    
Gross Reductions 0    
Ending balance $ 20,100    
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.00% [3],[4],[11]   6.00% [5],[7],[8]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.73% [3],[4]   10.73% [5],[7]
Spread 6.00% [3],[4]   6.00% [5],[7]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 10.73% [3],[4]   10.48% [5],[7]
Spread 6.00% [3],[4]   5.75% [5],[7]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 560 0  
Amount of Interest, Fees or Dividends Credited to Income 30 30  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 8,700 5,840  
Gross Additions 560 0  
Gross Reductions 0 0  
Ending balance $ 9,260 $ 5,840  
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.00%  
Spread   10.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   288  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   8,864  
Gross Additions   7  
Gross Reductions   233  
Ending balance   8,638  
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 9.00% [4],[11]   9.00% [7],[8]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.75% [4]   13.13% [7]
Spread 9.00% [4]   9.00% [7]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 517    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 14,954    
Gross Additions 6    
Gross Reductions 0    
Ending balance 14,960    
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (120) 0  
Amount of Interest, Fees or Dividends Credited to Income 285 295  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 22,920 24,140  
Gross Additions 0 0  
Gross Reductions 120 0  
Ending balance 22,800 24,140  
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 2      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 120 0  
Amount of Interest, Fees or Dividends Credited to Income 23 17  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,710 1,540  
Gross Additions 120 0  
Gross Reductions 0 0  
Ending balance $ 2,830 $ 1,540  
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   9.00%  
Spread   8.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (18)  
Amount of Interest, Fees or Dividends Credited to Income   419  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   17,817  
Gross Additions   18  
Gross Reductions   154  
Ending balance   17,681  
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.00% [4],[9],[11]   6.00% [7],[8]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.86% [4],[9]   12.13% [7]
Spread 8.00% [4],[9]   8.00% [7]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (6)    
Amount of Interest, Fees or Dividends Credited to Income 540    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 16,945    
Gross Additions 6    
Gross Reductions 6    
Ending balance 16,945    
Investment, Identifier [Axis]: Chandler Signs Holdings, LLC, Class A Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 210 160  
Amount of Interest, Fees or Dividends Credited to Income 36 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,790 460  
Gross Additions 210 160  
Gross Reductions 0 0  
Ending balance $ 2,000 620  
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.06% [3],[4],[9],[28]   10.72% [5],[6],[7],[29]
Spread 6.25% [3],[4],[9],[28]   6.25% [5],[6],[7],[29]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.08% [3],[4],[9],[28]   10.71% [5],[6],[7],[30]
Spread 6.25% [3],[4],[9],[28]   6.25% [5],[6],[7],[30]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate [3],[4],[9] 11.14%    
Spread [3],[4],[9] 6.25%    
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 210 100  
Amount of Interest, Fees or Dividends Credited to Income 196 209  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 13,340 13,990  
Gross Additions 210 100  
Gross Reductions 0 0  
Ending balance $ 13,550 $ 14,090  
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.00% 10.00% 10.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (9) (18)  
Amount of Interest, Fees or Dividends Credited to Income 149 158  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 5,694 5,694  
Gross Additions 9 18  
Gross Reductions 9 18  
Ending balance 5,694 5,694  
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   80  
Amount of Interest, Fees or Dividends Credited to Income   348  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   10,780  
Gross Additions   80  
Gross Reductions   0  
Ending balance   $ 10,860  
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) (1,050)    
Amount of Interest, Fees or Dividends Credited to Income 50    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 8,220    
Gross Additions 0    
Gross Reductions 1,050    
Ending balance 7,170    
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 2      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 220    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 610    
Gross Additions 220    
Gross Reductions 0    
Ending balance $ 830    
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate   10.50%  
Spread 9.00% [4],[9],[11] 9.50% 9.00% [6],[7],[8]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 1 285  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 10,401  
Gross Additions 0 10  
Gross Reductions 0 0  
Ending balance $ 0 $ 10,411  
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.79% [4],[9] 10.00% 13.23% [6],[7]
Spread 9.00% [4],[9]   9.00% [6],[7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 369 27  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 10,440 1,071  
Gross Additions 11 0  
Gross Reductions 480 8  
Ending balance $ 9,971 1,063  
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 10.00%   10.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 26    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,039    
Gross Additions 0    
Gross Reductions 8    
Ending balance $ 1,031    
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 15.00% [3],[12],[19]   15.00% [5],[13],[20]
PIK Rate 15.00% [3],[12],[19]   15.00% [5],[13],[20]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 1,062 1,020  
Amount of Interest, Fees or Dividends Credited to Income 780 352  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 24,637 15,260  
Gross Additions 1,063 1,020  
Gross Reductions 0 0  
Ending balance $ 25,700 $ 16,280  
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.88% [4] 7.00% 9.75% [7]
Spread 6.00% [4] 6.00% 6.00% [7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 127 159  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,560 4,000  
Gross Additions 0 3,600  
Gross Reductions 0 0  
Ending balance $ 4,560 $ 7,600  
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 8.00% 8.00% 8.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (11) (11)  
Amount of Interest, Fees or Dividends Credited to Income 396 396  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 19,274 19,274  
Gross Additions 11 11  
Gross Reductions 11 11  
Ending balance 19,274 19,274  
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 970 0  
Amount of Interest, Fees or Dividends Credited to Income 29 687  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 58,180 47,640  
Gross Additions 970 0  
Gross Reductions 0 0  
Ending balance $ 59,150 $ 47,640  
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.25%  
Spread   10.50%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (23)  
Amount of Interest, Fees or Dividends Credited to Income   1,380  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   42,484  
Gross Additions   2,888  
Gross Reductions   2,890  
Ending balance   42,482  
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 15.50% [4]   15.38% [7]
Spread 10.50% [4]   10.50% [7]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 11    
Amount of Interest, Fees or Dividends Credited to Income 59    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,462    
Gross Additions 13    
Gross Reductions 421    
Ending balance $ 1,054    
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 15.50% [4]   15.38% [7]
Spread 10.50% [4]   10.50% [7]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (20)    
Amount of Interest, Fees or Dividends Credited to Income 1,577    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 40,801    
Gross Additions 20    
Gross Reductions 444    
Ending balance 40,377    
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (960) 0  
Amount of Interest, Fees or Dividends Credited to Income (1,273) 369  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 9,160 9,130  
Gross Additions 0 0  
Gross Reductions 960 0  
Ending balance 8,200 $ 9,130  
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   745  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   24,351  
Gross Additions   16  
Gross Reductions   316  
Ending balance   24,051  
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00%   12.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 704    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 23,151    
Gross Additions 14    
Gross Reductions 315    
Ending balance 22,850    
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (1,390) 1,610  
Amount of Interest, Fees or Dividends Credited to Income 158 158  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 19,830 12,000  
Gross Additions 0 1,610  
Gross Reductions 1,390 0  
Ending balance $ 18,440 $ 13,610  
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.75% [4] 10.00%  
Spread 9.00% [4] 9.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (8)  
Amount of Interest, Fees or Dividends Credited to Income   159  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   6,477  
Gross Additions   8  
Gross Reductions   688  
Ending balance   5,797  
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 9.00%   9.00% [7],[8],[20]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.75%   13.13% [7]
Spread 9.00%   9.00% [7]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (3)    
Amount of Interest, Fees or Dividends Credited to Income 180    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 5,241    
Gross Additions 3    
Gross Reductions 375    
Ending balance $ 4,869    
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.34% [3],[4],[31]   12.56% [5],[7],[32]
Spread 7.50% [3],[4],[31]   8.00% [5],[7],[32]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.35% [3],[4]   12.56% [5],[7]
Spread 7.50% [3],[4]   8.00% [5],[7]
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   163  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   9,959  
Gross Additions   0  
Gross Reductions   1,106  
Ending balance   8,853  
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 123    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,657    
Gross Additions 0    
Gross Reductions 876    
Ending balance 6,781    
Investment, Identifier [Axis]: Copper Trail Energy Fund I, LP - CTMH, LP Interests (CTMH, LP)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 588 710  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance 588 710  
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,260 5,944  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 7,260 $ 5,944  
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 12.00% 12.00% 12.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (11) 0  
Amount of Interest, Fees or Dividends Credited to Income 647 647  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 21,200 20,993  
Gross Additions 11 11  
Gross Reductions 11 0  
Ending balance $ 21,200 21,004  
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units      
Schedule of Investments [Line Items]      
Total Rate 8.00% [3]   8.00% [5]
PIK Rate 8.00% [3]   8.00% [5]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)      
Schedule of Investments [Line Items]      
Total Rate 10.00% [3],[21]   10.00% [5],[23]
PIK Rate 10.00% [3],[21]   10.00% [5],[23]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 7.50% [3],[4],[11]   7.50% [5],[7],[8]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.44% [3],[4]   12.24% [5],[7]
Spread 7.50% [3],[4]   7.50% [5],[7]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.33% [3],[4],[9],[33]   11.90% [5],[6],[7]
Spread 7.50% [3],[4],[9],[33]   8.00% [5],[6],[7]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Spread 7.50% [3],[4],[9],[11]   8.00% [5],[6],[7],[8]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 12.26% [3],[4],[9]   12.56% [5],[6],[7]
Spread 7.50% [3],[4],[9]   8.00% [5],[6],[7]
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 0 60  
Amount of Interest, Fees or Dividends Credited to Income 0 24  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,670 2,610  
Gross Additions 0 60  
Gross Reductions 0 0  
Ending balance $ 2,670 $ 2,670  
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   7.50%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   209  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   7,668  
Gross Additions   43  
Gross Reductions   68  
Ending balance   7,643  
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 7.50%   7.50%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 4    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 223    
Gross Additions 227    
Gross Reductions 0    
Ending balance $ 450    
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.00%   7.50%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 254    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,789    
Gross Additions 39    
Gross Reductions 67    
Ending balance 7,761    
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 50 50  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 9,835 9,835  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 9,835 $ 9,835  
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 14.75% [4] 11.00% 14.13% [7]
Spread 10.00% [4] 10.00% 10.00% [7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 564 466  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 15,523 16,801  
Gross Additions 9 12  
Gross Reductions 329 330  
Ending balance 15,203 16,483  
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (520) 4,100  
Amount of Interest, Fees or Dividends Credited to Income 171 343  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 22,220 18,350  
Gross Additions 0 4,100  
Gross Reductions 520 0  
Ending balance 21,700 $ 22,450  
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.00%  
Spread   11.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (18)  
Amount of Interest, Fees or Dividends Credited to Income   752  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   24,048  
Gross Additions   21  
Gross Reductions   332  
Ending balance   23,737  
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Spread [7],[8]     11.00%
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) (7)    
Amount of Interest, Fees or Dividends Credited to Income 11    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 7    
Gross Reductions 7    
Ending balance $ 0    
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.00%   15.13% [7]
Spread [7]     11.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (14)    
Amount of Interest, Fees or Dividends Credited to Income 959    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 27,267    
Gross Additions 14    
Gross Reductions 405    
Ending balance 26,876    
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 28  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,898 3,280  
Gross Additions 0 28  
Gross Reductions 0 0  
Ending balance 2,898 3,308  
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners, LP)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 156 90  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 9,127 10,329  
Gross Additions 156 90  
Gross Reductions 0 0  
Ending balance 9,283 10,419  
Investment, Identifier [Axis]: Dos Rios Stone Products LLC, Class A Preferred Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 250 (290)  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,330 640  
Gross Additions 250 0  
Gross Reductions 0 290  
Ending balance $ 1,580 350  
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 9.18% [3],[4],[9]   9.18% [5],[6],[7]
Spread 4.50% [3],[4],[9]   4.50% [5],[6],[7]
PIK Rate 9.18% [3],[4],[9]   9.18% [5],[6],[7]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.18% [3],[4],[9]   11.18% [5],[6],[7]
Spread 6.50% [3],[4],[9]   6.50% [5],[6],[7]
PIK Rate 11.18% [3],[4],[9]   11.18% [5],[6],[7]
Investment, Identifier [Axis]: EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 14 2  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 19 27  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,013 547  
Gross Additions 15 2  
Gross Reductions 52 50  
Ending balance $ 976 499  
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.96% [2],[4]   10.70% [1],[7]
Spread 6.00% [2],[4]   6.00% [1],[7]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.95% [3],[4],[9]   11.73% [5],[7]
Spread 8.00% [3],[4],[9]   7.00% [5],[7]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.95% [3],[4],[9]   11.73% [5],[7]
Spread 8.00% [3],[4],[9]   7.00% [5],[7]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 12.95% [3],[4],[9]   11.73% [5],[7]
Spread 8.00% [3],[4],[9]   7.00% [5],[7]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,603    
Gross Additions 0    
Gross Reductions 0    
Ending balance   7,603  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 2      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,558    
Gross Additions 0    
Gross Reductions $ 0    
Ending balance   1,558  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.00% [4],[9],[11]   6.00% [6],[7],[8]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance (9)    
Gross Additions 1    
Gross Reductions $ 0    
Ending balance   (8)  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00%   12.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 573    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 18,594    
Gross Additions 10    
Gross Reductions $ 0    
Ending balance   18,604  
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 9.00%   9.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 144    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 6,294    
Gross Additions 1    
Gross Reductions $ 11    
Ending balance   6,284  
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.97% [2],[4],[9]   10.67% [1],[6],[7]
Spread 6.25% [2],[4],[9]   6.25% [1],[6],[7]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)      
Schedule of Investments [Line Items]      
Total Rate [23],[34],[35],[36]     0.10%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)      
Schedule of Investments [Line Items]      
Total Rate [23],[34],[35],[36]     0.38%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)      
Schedule of Investments [Line Items]      
Total Rate [23],[34],[35],[36]     0.14%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)      
Schedule of Investments [Line Items]      
Total Rate [23],[34],[35],[36]     0.15%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)      
Schedule of Investments [Line Items]      
Total Rate [34],[35],[36]     0.84%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)      
Schedule of Investments [Line Items]      
Total Rate [23],[34],[35],[36]     0.25%
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.43% [3],[4],[9]   11.68% [5],[6],[7]
Spread 6.50% [3],[4],[9]   6.50% [5],[6],[7]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.43% [3],[4],[9]   10.92% [5],[6],[7]
Spread 6.50% [3],[4],[9]   6.50% [5],[6],[7]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.73% [3],[4],[9],[22]   10.67% [5],[7],[24]
Spread 7.00% [3],[4],[9],[22]   7.00% [5],[7],[24]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.73% [3],[4],[9],[22]   10.67% [5],[7],[24]
Spread 7.00% [3],[4],[9],[22]   7.00% [5],[7],[24]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 3,610 0  
Amount of Interest, Fees or Dividends Credited to Income 538 280  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 17,580 10,400  
Gross Additions 3,610 0  
Gross Reductions 0 0  
Ending balance $ 21,190 $ 10,400  
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.25% [4] 7.50% 10.75% [7]
Spread 6.50% [4] 6.50% 6.50% [7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (4) 0  
Amount of Interest, Fees or Dividends Credited to Income 215 139  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,600 6,324  
Gross Additions 4 1,204  
Gross Reductions 4 0  
Ending balance $ 7,600 $ 7,528  
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.75% [4] 12.00% 13.25% [7]
Spread 9.00% [4] 11.00% 9.00% [7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (11) 0  
Amount of Interest, Fees or Dividends Credited to Income 730 647  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 21,200 20,996  
Gross Additions 11 10  
Gross Reductions 11 0  
Ending balance $ 21,200 21,006  
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.55% [3],[4],[9]   11.21% [5],[6],[7]
Spread 7.50% [3],[4],[9]   7.50% [5],[6],[7]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.55% [3],[4],[9]   12.19% [5],[6],[7]
Spread 7.50% [3],[4],[9]   7.50% [5],[6],[7]
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport Financial SBIC Fund LP)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 0 2  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,483 6,078  
Gross Additions 0 0  
Gross Reductions 0 1,493  
Ending balance 3,483 4,585  
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport First Lien Loan Fund III LP)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 134 108  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 5,848 7,231