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  
Gross Additions 0 0  
Gross Reductions 536 0  
Ending balance $ 5,312 7,231  
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 12.00% [2]   12.00% [1]
Investment, Identifier [Axis]: GFG Group, LLC., Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 450 0  
Amount of Interest, Fees or Dividends Credited to Income 39 251  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,140 6,990  
Gross Additions 450 0  
Gross Reductions 0 1  
Ending balance $ 7,590 $ 6,989  
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 9.00% 12.00% 9.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (6) (6)  
Amount of Interest, Fees or Dividends Credited to Income 261 383  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 11,345 12,545  
Gross Additions 6 6  
Gross Reductions 6 6  
Ending balance 11,345 12,545  
Investment, Identifier [Axis]: GRT Rubber Technologies 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 42 1,217  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 44,440 46,190  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 44,440 $ 46,190  
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   8.23%  
Spread   8.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (11)  
Amount of Interest, Fees or Dividends Credited to Income   803  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   38,885  
Gross Additions   11  
Gross Reductions   11  
Ending balance   38,885  
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.66%   10.12%
Spread 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 28    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 670    
Gross Additions 295    
Gross Reductions $ 0    
Ending balance   965  
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.66%   12.12%
Spread 8.00%   8.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (12)    
Amount of Interest, Fees or Dividends Credited to Income 1,280    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 40,493    
Gross Additions 12    
Gross Reductions 12    
Ending balance $ 40,493    
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.46% [3],[4]   11.20% [5],[7]
Spread 6.50% [3],[4]   6.50% [5],[7]
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.46% [3],[4]   11.24% [5],[7]
Spread 6.50% [3],[4]   6.50% [5],[7]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.99% [3],[4],[9],[37]   10.42% [5],[6],[7]
Spread 6.00% [3],[4],[9],[37]   6.00% [5],[6],[7]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate [3],[4],[9] 11.11%    
Spread 6.00% [3],[4],[9]   6.00% [5],[6],[7],[8]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 10.58% [3],[4],[9]   10.73% [5],[6],[7]
Spread 6.00% [3],[4],[9]   6.00% [5],[6],[7]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 8,480 (4,580)  
Amount of Interest, Fees or Dividends Credited to Income 1,567 180  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 50,890 49,700  
Gross Additions 8,480 0  
Gross Reductions 0 4,580  
Ending balance $ 59,370 $ 45,120  
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   10.50%  
Spread   8.50%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (5)  
Amount of Interest, Fees or Dividends Credited to Income   520  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   21,598  
Gross Additions   5  
Gross Reductions   5  
Ending balance   21,598  
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 8.50% [4],[9],[11]   8.50% [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 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.50% [4],[9],[38]   11.50% [6],[7]
Spread 8.50% [4],[9],[38]   8.50% [6],[7]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (24)    
Amount of Interest, Fees or Dividends Credited to Income 1,852    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 64,078    
Gross Additions 24    
Gross Reductions 824    
Ending balance   63,278  
Investment, Identifier [Axis]: Garreco, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (220) 70  
Amount of Interest, Fees or Dividends Credited to Income 12 40  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,800 2,270  
Gross Additions 0 70  
Gross Reductions 220 0  
Ending balance $ 1,580 $ 2,340  
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 12.00% [4],[39] 9.00% 9.50% [7],[40]
Spread 10.00% [4],[39] 8.00% 8.00% [7],[40]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 112 94  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,826 4,196  
Gross Additions 0 0  
Gross Reductions 277 0  
Ending balance $ 3,549 4,196  
Investment, Identifier [Axis]: GeoStabilization International (GSI), Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.17% [2],[9]   9.44% [1],[6]
Spread 5.25% [2],[9]   5.25% [1],[6]
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 580 (350)  
Amount of Interest, Fees or Dividends Credited to Income 718 195  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 6,790 5,640  
Gross Additions 580 0  
Gross Reductions 0 350  
Ending balance 7,370 $ 5,290  
Investment, Identifier [Axis]: Gulf Publishing Holdings, 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 0    
Gross Reductions 0    
Ending balance 0    
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Preferred Equity      
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 3,780    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 3,780    
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate   10.50%  
Spread 9.50% [4],[11]   9.50% [7],[8]
PIK Rate   5.25%  
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 0 3  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 257  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 0 $ 257  
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.50% 12.50% 12.50%
PIK Rate   6.25%  
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 (1,717)  
Amount of Interest, Fees or Dividends Credited to Income 75 212  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,284 9,717  
Gross Additions 0 0  
Gross Reductions 0 1,717  
Ending balance $ 2,284 8,000  
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 14.34% [3],[4],[9]   14.34% [5],[6],[7]
Spread 9.50% [3],[4],[9]   9.50% [5],[6],[7]
PIK Rate 14.34% [3],[4],[9]   2.00% [5],[6],[7]
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.34% [3],[4],[9]   14.34% [5],[6],[7]
Spread 9.50% [3],[4],[9]   9.50% [5],[6],[7]
PIK Rate 14.34% [3],[4],[9]   2.00% [5],[6],[7]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.50% [3],[4],[9],[11]   6.50% [5],[6],[7],[8]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Spread 6.50% [3],[4],[9],[11]   6.50% [5],[6],[7],[8]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 11.12% [3],[4],[9]   10.62% [5],[6],[7]
Spread 6.50% [3],[4],[9]   6.50% [5],[6],[7]
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.92% [2],[4],[41],[42]   10.69% [1],[7],[35],[43]
Spread 6.00% [2],[4],[41],[42]   6.00% [1],[7],[35],[43]
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (423 COR, 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 117    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,400    
Gross Additions 0    
Gross Reductions 0    
Ending balance 1,400    
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 3, L.P.)      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 698  
Amount of Unrealized Gain/(Loss) 113 (280)  
Amount of Interest, Fees or Dividends Credited to Income 0 2  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,331 4,712  
Gross Additions 113 0  
Gross Reductions 508 28  
Ending balance 3,936 4,684  
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 4, L.P.)      
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 2,332    
Gross Additions 0    
Gross Reductions 0    
Ending balance 2,332    
Investment, Identifier [Axis]: Harrison Hydra-Gen, Ltd., Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 210 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 3,280 3,530  
Gross Additions 210 0  
Gross Reductions 0 0  
Ending balance 3,490 3,530  
Investment, Identifier [Axis]: Hawk Ridge Systems, 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 65 579  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 17,460 14,680  
Gross Additions 0 1,890  
Gross Reductions 0 0  
Ending balance 17,460 16,570  
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 2      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 1,990  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 920 771  
Gross Additions 0 99  
Gross Reductions 0 0  
Ending balance $ 920 $ 870  
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.75% [4] 7.00% 10.13% [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 90 47  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,185 2,585  
Gross Additions 815 0  
Gross Reductions 0 0  
Ending balance $ 4,000 $ 2,585  
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.00% 8.00% 9.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (10) (8)  
Amount of Interest, Fees or Dividends Credited to Income 893 702  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 37,800 34,800  
Gross Additions 10 8  
Gross Reductions 10 8  
Ending balance $ 37,800 34,800  
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 11.34% [3],[4]   10.88% [5],[7]
Spread 6.50% [3],[4]   6.50% [5],[7]
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 600 (240)  
Amount of Interest, Fees or Dividends Credited to Income 2 1  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,400 3,210  
Gross Additions 600 0  
Gross Reductions 0 241  
Ending balance $ 3,000 $ 2,969  
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt      
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) (170) (90)  
Amount of Interest, Fees or Dividends Credited to Income 60 60  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,000 2,960  
Gross Additions 0 0  
Gross Reductions 170 90  
Ending balance $ 2,830 $ 2,870  
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.10% [3],[4],[9]   12.07% [5],[6]
Spread 8.25% [3],[4],[9]   8.25% [5],[6]
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)      
Schedule of Investments [Line Items]      
Total Rate [23],[34],[35]     20.00%
Diluted, percentage 20.00% [41],[44]   20.00% [34],[35]
Profits, percentage 21.75% [41],[44]   21.75% [34],[35]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 528    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 11,758    
Gross Additions 1,200    
Gross Reductions 0    
Ending balance $ 12,958    
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 24.40% profits interest)      
Schedule of Investments [Line Items]      
Diluted, percentage   20.00%  
Profits, percentage   24.40%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   52  
Amount of Interest, Fees or Dividends Credited to Income   516  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   14,387  
Gross Additions   52  
Gross Reductions   0  
Ending balance   14,439  
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [1],[6],[7],[45]     10.17%
Spread [1],[6],[7],[45]     5.75%
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate [1],[6],[7]     10.17%
Spread 5.75% [2],[4],[9],[11]   5.75% [1],[6],[7]
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate [2],[4],[9] 10.59%    
Spread [2],[4],[9] 5.75%    
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.48% [2],[4]   10.48% [1],[7]
Spread 5.75% [2],[4]   5.75% [1],[7]
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.99% [3],[4],[9]   13.98% [5],[7]
Spread 7.75% [3],[4],[9]   7.75% [5],[7]
PIK Rate 1.50% [3],[4],[9]   1.50% [5],[7]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 1      
Schedule of Investments [Line Items]      
Total Rate 6.00% [3]   6.00% [5]
PIK Rate 6.00% [3]   6.00% [5]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 15.25% [3],[4]   13.00% [5],[7],[46]
Spread 7.50% [3],[4]   5.50% [5],[7],[46]
PIK Rate 15.25% [3],[4]   13.00% [5],[7],[46]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 6.00% [3],[12]   6.00% [5],[13]
PIK Rate 6.00% [3],[12]   6.00% [5],[13]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 14.95% [3],[9]   14.42% [5],[6]
Spread 10.00% [3],[9]   10.00% [5],[6]
PIK Rate 14.95% [3],[9]   14.42% [5],[6]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 4      
Schedule of Investments [Line Items]      
Total Rate [3],[9] 14.66%    
Spread [3],[9] 10.00%    
PIK Rate [3],[9] 14.66%    
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 1      
Schedule of Investments [Line Items]      
Total Rate 10.00% [3],[21],[22]   10.00% [5],[23],[24]
PIK Rate 10.00% [3],[21],[22]   10.00% [5],[23],[24]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 2      
Schedule of Investments [Line Items]      
Total Rate 20.00% [3],[21],[22]   20.00% [5],[23],[24]
PIK Rate 20.00% [3],[21],[22]   20.00% [5],[23],[24]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.50% [3],[4]   11.50% [5],[7]
Spread 6.75% [3],[4]   6.75% [5],[7]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.50% [3],[4]   11.50% [5],[7]
Spread 6.75% [3],[4]   6.75% [5],[7]
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Preferred Equity      
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 4,000    
Gross Reductions 0    
Ending balance $ 4,000    
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 183    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 17,823    
Gross Reductions 0    
Ending balance $ 17,823    
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 5.50% [3],[4],[11]   5.50% [5],[7],[8]
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.23% [3],[4]   10.23% [5],[7]
Spread 5.50% [3],[4]   5.50% [5],[7]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 14.76% [3]   14.22% [5],[47]
Spread 10.00% [3]   10.00% [5],[47]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.63% [3],[4],[12]   12.07% [5],[7],[13]
Spread 7.00% [3],[4],[12]   7.00% [5],[7],[13]
PIK Rate 11.63% [3],[4],[12]   1.00% [5],[7],[13]
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.84% [2],[4]   10.38% [1],[7]
Spread 6.00% [2],[4]   6.00% [1],[7]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.32% [3],[4],[48]   10.14% [5],[7]
Spread 6.50% [3],[4],[48]   6.50% [5],[7]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.23% [3],[4]   10.17% [5],[7]
Spread 6.50% [3],[4]   6.50% [5],[7]
Investment, Identifier [Axis]: Iron-Main Investments, LLC, 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 1,798 1,798  
Gross Additions 958 0  
Gross Reductions 0 0  
Ending balance $ 2,756 $ 1,798  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 13.50% 12.50% 12.50%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 151 102  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,500 3,170  
Gross Additions 2 1  
Gross Reductions 0 0  
Ending balance $ 4,502 $ 3,171  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.50% 12.50% 12.50%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 105 146  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,130 4,557  
Gross Additions 2 2  
Gross Reductions 0 0  
Ending balance $ 3,132 $ 4,559  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 13.50% 12.50% 12.50%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 294 915  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 8,944 28,749  
Gross Additions 0 10  
Gross Reductions 0 0  
Ending balance $ 8,944 28,759  
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4      
Schedule of Investments [Line Items]      
Total Rate 13.50%   12.50%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 658    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 19,559    
Gross Additions 9    
Gross Reductions 0    
Ending balance $ 19,568    
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 5      
Schedule of Investments [Line Items]      
Total Rate 13.50%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 489    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 10,836    
Gross Reductions 0    
Ending balance $ 10,836    
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 9.93% [2],[4],[12]   9.93% [1],[7],[13]
Spread 7.75% [2],[4],[12]   7.75% [1],[7],[13]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.00% [3],[4],[11]   6.00% [5],[7],[8]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, 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]: Jackmont Hospitality, Inc., Preferred Equity      
Schedule of Investments [Line Items]      
Total Rate [5],[23]     12.00%
PIK Rate [5],[23]     12.00%
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.23% [3],[4]   12.23% [5],[7]
Spread 7.50% [3],[4]   7.50% [5],[7]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.23% [3],[4]   12.23% [5],[7]
Spread 7.50% [3],[4]   7.50% [5],[7]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) (120) 2,700  
Amount of Interest, Fees or Dividends Credited to Income 129 537  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 14,970 12,420  
Gross Additions 0 2,700  
Gross Reductions 120 0  
Ending balance $ 14,850 $ 15,120  
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   10.00%  
Spread   6.75%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (3)  
Amount of Interest, Fees or Dividends Credited to Income   64  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   2,550  
Gross Additions   3  
Gross Reductions   103  
Ending balance   2,450  
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.75% [11]   6.75% [8]
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]: Jensen Jewelers of Idaho, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.50% [4]   13.75% [7]
Spread 6.75% [4]   6.75% [7]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (2)    
Amount of Interest, Fees or Dividends Credited to Income 90    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,450    
Gross Additions 2    
Gross Reductions 2    
Ending balance $ 2,450    
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 23.04% [2],[9]   18.00% [1]
Spread [2],[9] 18.00%    
PIK Rate [2],[9] 23.04%    
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 21.08% [2],[9],[12]   19.75% [1],[13]
Spread [2],[9],[12] 16.00%    
PIK Rate 21.08% [2],[9],[12]   19.75% [1],[13]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Preferred Equity      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 1,010 0  
Amount of Interest, Fees or Dividends Credited to Income 71 318  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 5,540 3,150  
Gross Additions 1,010 0  
Gross Reductions 0 0  
Ending balance $ 6,550 $ 3,150  
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   13.00%  
Spread   11.50%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   382  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   11,344  
Gross Additions   6  
Gross Reductions   0  
Ending balance   11,350  
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 11.50% [4],[11]   11.50% [7],[8]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (1)    
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 1    
Gross Reductions 1    
Ending balance $ 0    
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 16.25% [4]   15.63% [7]
Spread 11.50% [4]   11.50% [7]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (5)    
Amount of Interest, Fees or Dividends Credited to Income 407    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 9,999    
Gross Additions 5    
Gross Reductions 5    
Ending balance 9,999    
Investment, Identifier [Axis]: JorVet 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   0  
Gross Additions   10,741  
Gross Reductions   0  
Ending balance   $ 10,741  
Investment, Identifier [Axis]: JorVet Holdings, LLC, Preferred Equity      
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 221    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 10,741    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 10,741    
Investment, Identifier [Axis]: JorVet Holdings, 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) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 782 257  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 25,432 0  
Gross Additions 13 25,394  
Gross Reductions 0 0  
Ending balance 25,445 25,394  
Investment, Identifier [Axis]: KBK Industries, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (3,590) 310  
Amount of Interest, Fees or Dividends Credited to Income 6,134 211  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 15,570 13,620  
Gross Additions 0 310  
Gross Reductions 3,590 0  
Ending balance $ 11,980 13,930  
Investment, Identifier [Axis]: KBK Industries, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 56    
Amount of Interest, Fees or Dividends Credited to Income 184    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 6,000    
Gross Reductions 250    
Ending balance $ 5,750    
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.00% [3],[4]   12.00% [5],[7]
Spread 7.25% [3],[4]   7.25% [5],[7]
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00% [3],[4]   12.00% [5],[7]
Spread 7.25% [3],[4]   7.25% [5],[7]
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (70)    
Amount of Interest, Fees or Dividends Credited to Income 29    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,850    
Gross Additions 0    
Gross Reductions 70    
Ending balance 2,780    
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   (70)  
Amount of Interest, Fees or Dividends Credited to Income   0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   12,310  
Gross Additions   0  
Gross Reductions   70  
Ending balance   12,240  
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units 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   26  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   2,460  
Gross Additions   0  
Gross Reductions   0  
Ending balance   $ 2,460  
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Preferred Equity      
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 7,220    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 7,220    
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.00% 11.50% 11.50%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 780 599  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 20,374 20,324  
Gross Additions 192 12  
Gross Reductions 0 0  
Ending balance $ 20,566 $ 20,336  
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 9.00% 9.00% 9.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 88 88  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,842 3,876  
Gross Additions 0 0  
Gross Reductions 9 8  
Ending balance $ 3,833 3,868  
Investment, Identifier [Axis]: Kore Wireless Group Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.08% [2],[9]   10.08% [1],[6]
Spread 5.50% [2],[9]   5.50% [1],[6]
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, 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   224  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   2,560  
Gross Additions   0  
Gross Reductions   0  
Ending balance   2,560  
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Preferred Member Units (non-voting)      
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   4  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   107  
Gross Additions   4  
Gross Reductions   0  
Ending balance   $ 111  
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.11% [3],[4],[9]   11.21% [5],[6],[7]
Spread 7.25% [3],[4],[9]   7.25% [5],[6],[7]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.13% [3],[4],[9],[49]   11.67% [5],[6],[7]
Spread 7.25% [3],[4],[9],[49]   7.25% [5],[6],[7]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 12.09% [3],[4],[9]   11.67% [5],[6],[7]
Spread 7.25% [3],[4],[9]   7.25% [5],[6],[7]
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.75% [3],[4]   12.74% [5],[7]
Spread 9.00% [3],[4]   9.00% [5],[7]
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.16% [2]   9.73% [1]
Spread 5.00% [2]   5.00% [1]
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.59% [3],[4]   10.13% [5],[7]
Spread 5.75% [3],[4]   5.75% [5],[7]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.72% [2],[4],[9],[10]   10.42% [1],[6],[7]
Spread 6.00% [2],[4],[9],[10]   6.00% [1],[6],[7]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.72% [2],[4],[9]   10.42% [1],[6],[7]
Spread 6.00% [2],[4],[9]   6.00% [1],[6],[7]
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 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 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance 0    
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 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 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.00% [19] 13.00% 13.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 952 (1,495)  
Amount of Interest, Fees or Dividends Credited to Income 196 274  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,548 5,934  
Gross Additions 952 9  
Gross Reductions 116 1,575  
Ending balance 5,384 4,368  
Investment, Identifier [Axis]: MS Private Loan Fund, LP Interests      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (58) 0  
Amount of Interest, Fees or Dividends Credited to Income 370 72  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 14,833 2,581  
Gross Additions 0 5,000  
Gross Reductions 58 0  
Ending balance 14,775 $ 7,581  
Investment, Identifier [Axis]: MS Private Loan Fund, 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 6    
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]: MS Private Loan Fund, Secured Debt 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 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance 0    
Investment, Identifier [Axis]: MS Private Loan Fund, Unsecured 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   435  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   63,151  
Gross Additions   17,000  
Gross Reductions   80,151  
Ending balance   0  
Investment, Identifier [Axis]: MSC Adviser I, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 9,720 (7,480)  
Amount of Interest, Fees or Dividends Credited to Income 3,057 2,277  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 122,930 140,400  
Gross Additions 9,720 0  
Gross Reductions 0 7,480  
Ending balance 132,650 $ 132,920  
Investment, Identifier [Axis]: MSC Income Fund, Inc., Common Equity      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 7    
Amount of Interest, Fees or Dividends Credited to Income 15    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 753    
Gross Additions 7    
Gross Reductions 0    
Ending balance $ 760    
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.30% [3],[4]   11.79% [5],[7],[50]
Spread 7.25% [3],[4]   7.25% [5],[7],[50]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.30% [3],[4]   11.09% [5],[7]
Spread 7.25% [3],[4]   7.25% [5],[7]
Investment, Identifier [Axis]: Market Force Information, 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 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 15.75% [4] 12.00% 15.13% [7]
Spread 11.00% [4] 11.00% 11.00% [7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (6,725) 0  
Amount of Interest, Fees or Dividends Credited to Income 260 102  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 6,090 3,400  
Gross Additions 635 0  
Gross Reductions 6,725 0  
Ending balance $ 0 $ 3,400  
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00% [12] 12.00% 12.00% [13]
PIK Rate 12.00% [12] 12.00% 12.00% [13]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (1,610) 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 1,610 8,936  
Gross Additions 0 0  
Gross Reductions 1,610 0  
Ending balance 0 8,936  
Investment, Identifier [Axis]: MetalForming AcquireCo, 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 327    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,537    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 1,537    
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Preferred Equity      
Schedule of Investments [Line Items]      
Total Rate 8.00% [21]   8.00% [23]
Spread [21] 8.00%    
PIK Rate 8.00%   8.00% [23]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 148    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 6,010    
Gross Additions 117    
Gross Reductions 0    
Ending balance 6,127    
Investment, Identifier [Axis]: MetalForming AcquireCo, 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 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]: MetalForming AcquireCo, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.75%   12.75%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 739    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 23,576    
Gross Additions 12    
Gross Reductions 0    
Ending balance $ 23,588    
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.25% [3],[4],[9],[11]   6.25% [5],[6],[7],[8]
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.09% [3],[4],[9]   9.86% [5],[6],[7]
Spread 6.25% [3],[4],[9]   6.25% [5],[6],[7]
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 11.08% [3],[4]   10.66% [5],[7]
Spread 6.25% [3],[4]   6.25% [5],[7]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [3],[4],[41],[42] 12.11%    
Spread 7.00% [3],[4],[41],[42]   7.00% [5],[7],[8],[35],[43]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.73% [3],[4],[41],[42]   11.73% [5],[7],[35],[43]
Spread 7.00% [3],[4],[41],[42]   7.00% [5],[7],[35],[43]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 11.73% [3],[4],[41],[42]   11.73% [5],[7],[35],[43]
Spread 7.00% [3],[4],[41],[42]   7.00% [5],[7],[35],[43]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 2,180 2,220  
Amount of Interest, Fees or Dividends Credited to Income 992 568  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 22,830 8,840  
Gross Additions 2,180 2,220  
Gross Reductions 0 0  
Ending balance 25,010 $ 11,060  
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   10.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (1)  
Amount of Interest, Fees or Dividends Credited to Income   157  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   6,378  
Gross Additions   1  
Gross Reductions   281  
Ending balance   6,098  
Investment, Identifier [Axis]: Mystic Logistics Holdings, 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]: Mystic Logistics Holdings, LLC, Secured Debt 2      
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 144    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 5,746    
Gross Additions 0    
Gross Reductions 0    
Ending balance 5,746    
Investment, Identifier [Axis]: NAPCO Precast, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 670 (190)  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 11,830 13,560  
Gross Additions 670 0  
Gross Reductions 0 190  
Ending balance $ 12,500 13,370  
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.71% [2],[4],[12]   9.67% [1],[7]
Spread 5.50% [2],[4],[12]   5.50% [1],[7]
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   (150)  
Amount of Interest, Fees or Dividends Credited to Income   101  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   6,440  
Gross Additions   0  
Gross Reductions   150  
Ending balance   $ 6,290  
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 279    
Amount of Interest, Fees or Dividends Credited to Income 13    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,615    
Gross Additions 278    
Gross Reductions 0    
Ending balance 4,893    
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 2      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 11    
Amount of Interest, Fees or Dividends Credited to Income (2)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 175    
Gross Additions 12    
Gross Reductions 0    
Ending balance $ 187    
Investment, Identifier [Axis]: NRP Jones, 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) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 62 62  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,080 2,080  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 2,080 2,080  
Investment, Identifier [Axis]: NTM Acquisition Corp., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.30% [2],[4],[9]   9.50% [1],[7]
Spread 7.25% [2],[4],[9]   6.25% [1],[7]
PIK Rate 1.00% [2],[4],[9]   1.00% [1],[7]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.85% [3],[4],[9],[51]   10.85% [5],[6],[7],[52]
Spread 8.00% [3],[4],[9],[51]   8.00% [5],[6],[7],[52]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.87% [3],[4],[9]   12.56% [5],[6],[7]
Spread 8.00% [3],[4],[9]   8.00% [5],[6],[7]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 20.00% [3]   20.00% [5]
PIK Rate 20.00% [3]   20.00% [5]
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 3,520 0  
Amount of Interest, Fees or Dividends Credited to Income 125 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,700 7,700  
Gross Additions 3,520 0  
Gross Reductions 0 0  
Ending balance $ 11,220 $ 7,700  
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate   12.00%  
Spread 7.00%    
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 2 541  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 10,412  
Gross Additions 0 6  
Gross Reductions 0 0  
Ending balance $ 0 $ 10,418  
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00% 12.00%  
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (10) 0  
Amount of Interest, Fees or Dividends Credited to Income 613 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 20,094 4,829  
Gross Additions 10 1,408  
Gross Reductions 10 0  
Ending balance $ 20,094 6,237  
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 12.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (5)    
Amount of Interest, Fees or Dividends Credited to Income 320    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 10,500    
Gross Additions 5    
Gross Reductions 5    
Ending balance $ 10,500    
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.00%    
Spread [7],[8]     7.00%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00%   12.00%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate     12.00%
Investment, Identifier [Axis]: NexRev LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 1,880 0  
Amount of Interest, Fees or Dividends Credited to Income 131 20  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,110 2,690  
Gross Additions 1,880 0  
Gross Reductions 0 0  
Ending balance 2,990 $ 2,690  
Investment, Identifier [Axis]: NexRev 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   850  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   14,045  
Gross Additions   10  
Gross Reductions   218  
Ending balance   13,837  
Investment, Identifier [Axis]: NexRev 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 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.00%   11.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 1,000    
Amount of Interest, Fees or Dividends Credited to Income 320    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 8,477    
Gross Additions 1,022    
Gross Reductions 629    
Ending balance $ 8,870    
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.25% [3],[4],[11]   6.25% [5],[7],[8]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Spread 6.25% [3],[4],[11]   6.25% [5],[7],[8]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 11.00% [3],[4]   9.99% [5],[7]
Spread 6.25% [3],[4]   6.25% [5],[7]
Investment, Identifier [Axis]: NuStep, 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   13,500  
Gross Additions   0  
Gross Reductions   0  
Ending balance   $ 13,500  
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (410)    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 8,040    
Gross Additions 0    
Gross Reductions 410    
Ending balance 7,630    
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 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 5,150    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 5,150    
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.25% [4] 7.50% 10.63% [7]
Spread 6.50% [4] 6.50% 6.50% [7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 122 48  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,399 1,720  
Gross Additions 0 1,200  
Gross Reductions 0 0  
Ending balance $ 4,399 $ 2,920  
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 2      
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) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 556 504  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 18,414 17,240  
Gross Additions 3 0  
Gross Reductions 0 0  
Ending balance 18,417 17,240  
Investment, Identifier [Axis]: OMi Topco, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 2,290 0  
Amount of Interest, Fees or Dividends Credited to Income 675 479  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 22,810 20,210  
Gross Additions 2,290 0  
Gross Reductions 0 0  
Ending balance $ 25,100 $ 20,210  
Investment, Identifier [Axis]: OMi Topco, 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) (13) (14)  
Amount of Interest, Fees or Dividends Credited to Income 485 554  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 15,750 18,000  
Gross Additions 13 14  
Gross Reductions 763 514  
Ending balance $ 15,000 $ 17,500  
Investment, Identifier [Axis]: OVG Business Services, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.89% [3],[4]   10.64% [5],[7]
Spread 6.25% [3],[4]   6.25% [5],[7]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., 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 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock      
Schedule of Investments [Line Items]      
Total Rate 7.00%   7.00%
PIK Rate 7.00%   7.00%
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]: OnAsset Intelligence, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.00% [12] 12.00% 12.00% [13]
PIK Rate 12.00% [12] 12.00% 12.00% [13]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (6) 0  
Amount of Interest, Fees or Dividends Credited to Income 0 29  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 569 935  
Gross Additions 0 29  
Gross Reductions 6 0  
Ending balance $ 563 $ 964  
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00% [12] 12.00% 12.00% [13]
PIK Rate 12.00% [12] 12.00% 12.00% [13]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (6) 0  
Amount of Interest, Fees or Dividends Credited to Income 0 29  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 580 954  
Gross Additions 0 29  
Gross Reductions 6 0  
Ending balance $ 574 $ 983  
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 12.00% [12] 12.00% 12.00% [13]
PIK Rate 12.00% [12] 12.00% 12.00% [13]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (14) 0  
Amount of Interest, Fees or Dividends Credited to Income 0 62  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,249 2,055  
Gross Additions 0 61  
Gross Reductions 13 0  
Ending balance $ 1,236 $ 2,116  
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 4      
Schedule of Investments [Line Items]      
Total Rate 12.00% [12] 12.00% 12.00% [13]
PIK Rate 12.00% [12] 12.00% 12.00% [13]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (28) 0  
Amount of Interest, Fees or Dividends Credited to Income 0 129  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,606 4,286  
Gross Additions 0 129  
Gross Reductions 29 0  
Ending balance $ 2,577 $ 4,415  
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.00% [12] 10.00% 10.00% [13]
PIK Rate 10.00% [12] 10.00% 10.00% [13]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 0 5  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 305 191  
Gross Additions 0 6  
Gross Reductions 0 0  
Ending balance 305 197  
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., 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]: Oneliance, LLC, Preferred 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 1,056 1,056  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 1,056 $ 1,056  
Investment, Identifier [Axis]: Oneliance, LLC, 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)   0  
Amount of Interest, Fees or Dividends Credited to Income   171  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   5,547  
Gross Additions   3  
Gross Reductions   0  
Ending balance   5,550  
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 11.00%   11.00% [7],[8]
PIK Rate [4],[11] 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]: Oneliance, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 15.75% [4]   15.13% [7]
Spread 11.00%   11.00% [7]
PIK Rate [4] 11.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 219    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 5,559    
Gross Additions 3    
Gross Reductions 80    
Ending balance 5,482    
Investment, Identifier [Axis]: Orttech Holdings, LLC, Preferred Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 1,750 0  
Amount of Interest, Fees or Dividends Credited to Income 269 193  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 11,750 10,000  
Gross Additions 1,750 0  
Gross Reductions 0 0  
Ending balance $ 13,500 $ 10,000  
Investment, Identifier [Axis]: Orttech Holdings, LLC, 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)   0  
Amount of Interest, Fees or Dividends Credited to Income   743  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   24,150  
Gross Additions   13  
Gross Reductions   0  
Ending balance   24,163  
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 11.00% [4],[11]   11.00% [7],[8]
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]: Orttech Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 15.75% [4]   15.13% [7]
Spread 11.00% [4]   11.00% [7]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 924    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 23,429    
Gross Additions 17    
Gross Reductions 800    
Ending balance $ 22,646    
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 11.50% [3],[12]   11.50% [5],[13]
Investment, Identifier [Axis]: Other, Affiliate Investments      
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]: Other, 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 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]: PPL RVs, Inc., Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   560  
Amount of Interest, Fees or Dividends Credited to Income   104  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   14,360  
Gross Additions   560  
Gross Reductions   0  
Ending balance   $ 14,920  
Investment, Identifier [Axis]: PPL RVs, Inc., 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 104    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 18,950    
Gross Additions 0    
Gross Reductions 0    
Ending balance 18,950    
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 2      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) (68)    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 238    
Gross Additions 0    
Gross Reductions 68    
Ending balance $ 170    
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate   7.50%  
Spread 7.00% [4],[11] 7.00% 7.00% [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 0 36  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 726  
Gross Additions 0 1,257  
Gross Reductions 0 0  
Ending balance $ 0 $ 1,983  
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.38% [4] 7.50% 10.25% [7]
Spread 7.00% [4] 7.00% 7.00% [7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (13) 0  
Amount of Interest, Fees or Dividends Credited to Income 629 219  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 21,655 11,655  
Gross Additions 13 0  
Gross Reductions 13 0  
Ending balance $ 21,655 11,655  
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [4],[41] 14.25%    
Spread 6.25% [4],[41]   7.25% [5],[6],[7],[8],[35]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.32% [4],[9],[41]   11.80% [5],[6],[7],[35]
Spread 7.25% [4],[9],[41]   7.25% [5],[6],[7],[35]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 10.70% [3],[4],[9]   10.26% [5],[6],[7]
Spread 5.75% [3],[4],[9]   5.75% [5],[6],[7]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.78% [3],[4],[9]   9.96% [5],[6],[7],[53]
Spread 5.75% [3],[4],[9]   5.75% [5],[6],[7],[53]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 10.48% [3],[4],[9]   9.81% [5],[6],[7]
Spread 5.75% [3],[4],[9]   5.75% [5],[6],[7]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss)   0  
Amount of Unrealized Gain/(Loss)   8,080  
Amount of Interest, Fees or Dividends Credited to Income   1,756  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   26,970  
Gross Additions   8,080  
Gross Reductions   0  
Ending balance   $ 35,050  
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Preferred Equity      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 280    
Amount of Interest, Fees or Dividends Credited to Income 2,879    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 43,260    
Gross Additions 280    
Gross Reductions 0    
Ending balance $ 43,540    
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (18)  
Amount of Interest, Fees or Dividends Credited to Income   1,004  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   32,674  
Gross Additions   1,518  
Gross Reductions   18  
Ending balance   34,174  
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 5    
Amount of Interest, Fees or Dividends Credited to Income 29    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 3,500    
Gross Reductions 0    
Ending balance $ 3,500    
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 38    
Amount of Interest, Fees or Dividends Credited to Income 142    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 11,500    
Gross Reductions 0    
Ending balance $ 11,500    
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 12.00%   12.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (20)    
Amount of Interest, Fees or Dividends Credited to Income 868    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 28,681    
Gross Additions 20    
Gross Reductions 1,020    
Ending balance 27,681    
Investment, Identifier [Axis]: Principle Environmental, LLC, Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (90) 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 590 710  
Gross Additions 0 0  
Gross Reductions 90 0  
Ending balance 500 710  
Investment, Identifier [Axis]: Principle Environmental, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (1,940) 0  
Amount of Interest, Fees or Dividends Credited to Income 286 219  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 12,420 11,160  
Gross Additions 0 0  
Gross Reductions 1,940 0  
Ending balance $ 10,480 $ 11,160  
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.00%    
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate   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 0 51  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 1,465  
Gross Additions 0 3  
Gross Reductions 0 500  
Ending balance $ 0 $ 968  
Investment, Identifier [Axis]: Principle Environmental, 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 198 198  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 5,806 5,808  
Gross Additions 6 6  
Gross Reductions 0 0  
Ending balance $ 5,812 5,814  
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.25% [3],[4],[11]   6.25% [5],[7],[8]
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.89% [3],[4]   10.64% [5],[7]
Spread 6.25% [3],[4]   6.25% [5],[7]
Investment, Identifier [Axis]: Quality Lease Service, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 0 (29)  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 525 2,149  
Gross Additions 0 0  
Gross Reductions 0 679  
Ending balance $ 525 1,470  
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [3],[4],[9] 11.47%    
Spread 6.75% [3],[4],[9]   6.75% [5],[6],[7],[8]
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.63% [3],[4],[9]   10.56% [5],[6],[7]
Spread 6.75% [3],[4],[9]   6.75% [5],[6],[7]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.52% [3],[4],[9]   12.02% [5],[6],[7],[54]
Spread 7.75% [3],[4],[9]   7.75% [5],[6],[7],[54]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.52% [3],[4],[9]   11.49% [5],[6],[7]
Spread 7.75% [3],[4],[9]   7.75% [5],[6],[7]
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.31% [2],[4]   8.84% [1],[7]
Spread 5.50% [2],[4]   5.50% [1],[7]
Investment, Identifier [Axis]: River Aggregates, 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 3,620 3,280  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance 3,620 3,280  
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Preferred Equity      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (4,950) 0  
Amount of Interest, Fees or Dividends Credited to Income 0 140  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 14,880 11,070  
Gross Additions 0 0  
Gross Reductions 4,950 0  
Ending balance 9,930 $ 11,070  
Investment, Identifier [Axis]: Robbins Bros. Jewelry, 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)   0  
Amount of Interest, Fees or Dividends Credited to Income   1,117  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   35,956  
Gross Additions   21  
Gross Reductions   0  
Ending balance   $ 35,977  
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., 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 8    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance (35)    
Gross Additions 2    
Gross Reductions 0    
Ending balance $ (33)    
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.50%   12.50% [7]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 1,128    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 35,404    
Gross Additions 19    
Gross Reductions 225    
Ending balance 35,198    
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, 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]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.00% 12.00% [13],[20],[55]
Amount of Realized Gain/(Loss) (29,526) $ (8)  
Amount of Unrealized Gain/(Loss) 29,865 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 29,865 0  
Gross Reductions 29,865 0  
Ending balance $ 0 0  
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [5],[6],[7]     10.97%
Spread 6.50% [3],[4],[9],[11]   6.50% [5],[6],[7]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.35% [3],[4],[9]   10.32% [5],[6],[7]
Spread 6.50% [3],[4],[9]   6.50% [5],[6],[7]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 11.35% [3],[4],[9]   10.32% [5],[6],[7]
Spread 6.50% [3],[4],[9]   6.50% [5],[6],[7]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 13.02% [3],[4],[9]   13.02% [5],[6],[7]
Spread 6.25% [3],[4],[9]   6.25% [5],[6],[7]
PIK Rate 2.00% [3],[4],[9]   2.00% [5],[6],[7]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 13.02% [3],[4],[9]   13.02% [5],[6],[7]
Spread 6.25% [3],[4],[9]   6.25% [5],[6],[7]
PIK Rate 2.00% [3],[4],[9]   2.00% [5],[6],[7]
Investment, Identifier [Axis]: SI East, LLC (Stavig), Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 0 960  
Amount of Interest, Fees or Dividends Credited to Income 343 89  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 13,650 11,570  
Gross Additions 0 959  
Gross Reductions 0 0  
Ending balance 13,650 $ 12,529  
Investment, Identifier [Axis]: SI East, LLC (Stavig), Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   10.25%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (18)  
Amount of Interest, Fees or Dividends Credited to Income   2,048  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   65,850  
Gross Additions   18  
Gross Reductions   325  
Ending balance   65,543  
Investment, Identifier [Axis]: SI East, LLC (Stavig), 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 7    
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]: SI East, LLC (Stavig), Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 9.50%    
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (33)    
Amount of Interest, Fees or Dividends Credited to Income 2,144    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 89,786    
Gross Additions 33    
Gross Reductions 5,283    
Ending balance $ 84,536    
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 9.50%   9.50%
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.21% [3],[4]   11.01% [5],[7]
Spread 6.25% [3],[4]   6.25% [5],[7]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.21% [3],[4]   11.01% [5],[7]
Spread 6.25% [3],[4]   6.25% [5],[7]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 11.21% [3],[4]   11.01% [5],[7]
Spread 6.25% [3],[4]   6.25% [5],[7]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 7.50% [3],[4],[9],[11]   7.50% [5],[6],[7],[8]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.23% [3],[4],[9]   11.06% [5],[6],[7]
Spread 7.50% [3],[4],[9]   7.50% [5],[6],[7]
Investment, Identifier [Axis]: Savers, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.34% [2],[4],[9]   10.34% [1],[6],[7]
Spread 5.50% [2],[4],[9]   5.50% [1],[6],[7]
Investment, Identifier [Axis]: Slick Innovations, LLC, Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 260 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 1,530 1,510  
Gross Additions 260 0  
Gross Reductions 0 0  
Ending balance $ 1,790 $ 1,510  
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 14.00% 13.00% 14.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (9) (13)  
Amount of Interest, Fees or Dividends Credited to Income 492 182  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 13,840 5,320  
Gross Additions 9 13  
Gross Reductions 249 213  
Ending balance 13,600 5,120  
Investment, Identifier [Axis]: Slick Innovations, 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   400  
Gross Additions   0  
Gross Reductions   0  
Ending balance   400  
Investment, Identifier [Axis]: Sonic Systems International, LLC, Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) (50) (60)  
Amount of Interest, Fees or Dividends Credited to Income 11 11  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,280 1,070  
Gross Additions 0 0  
Gross Reductions 50 60  
Ending balance $ 1,230 $ 1,010  
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 12.26% [3],[4] 8.50% 11.24% [5],[7]
Spread 7.50% [3],[4] 7.50% 7.50% [5],[7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (17) 0  
Amount of Interest, Fees or Dividends Credited to Income 499 267  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 15,769 11,757  
Gross Additions 17 12  
Gross Reductions 17 0  
Ending balance $ 15,769 11,769  
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 5.25% [3],[4],[11]   5.75% [5],[7],[8]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.03% [3],[4]   9.69% [5],[7]
Spread 5.25% [3],[4]   5.75% [5],[7]
Investment, Identifier [Axis]: Staples Canada ULC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 12.02% [3],[4],[41],[42],[56]   11.83% [5],[7],[35],[43],[57]
Spread 7.00% [3],[4],[41],[42],[56]   7.00% [5],[7],[35],[43],[57]
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.54% [2],[4],[9]   10.05% [1],[6],[7]
Spread 5.50% [2],[4],[9]   5.50% [1],[6],[7]
Investment, Identifier [Axis]: Student Resource Center, LLC, Preferred Equity      
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]: Student Resource Center, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.69% [3]   13.27% [5]
Spread 8.50% [3]   8.50% [5]
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 108    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,556    
Gross Additions 0    
Gross Reductions 0    
Ending balance 4,556    
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 470 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 4,500 4,500  
Gross Additions 470 0  
Gross Reductions 0 0  
Ending balance $ 4,970 $ 4,500  
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., 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) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 652 656  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 21,378 21,332  
Gross Additions 17 12  
Gross Reductions 1,000 0  
Ending balance $ 20,395 21,344  
Investment, Identifier [Axis]: Tacala Investment Corp., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 8.34% [4],[28],[58]   7.88% [7],[59],[60]
Spread 3.50% [4],[28],[58]   3.50% [7],[59],[60]
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 9.93% [2],[4]   9.93% [1],[7]
Spread 5.00% [2],[4]   5.00% [1],[7]
Investment, Identifier [Axis]: Tedder Industries, 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   8,579  
Gross Additions   0  
Gross Reductions   0  
Ending balance   $ 8,579  
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) (810)    
Amount of Interest, Fees or Dividends Credited to Income 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,681    
Gross Additions 0    
Gross Reductions 810    
Ending balance 6,871    
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 2      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 111    
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 333    
Gross Reductions 0    
Ending balance $ 333    
Investment, Identifier [Axis]: Tedder Industries, 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   525  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   16,181  
Gross Additions   582  
Gross Reductions   0  
Ending balance   16,763  
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 1      
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 55    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,840    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 1,840    
Investment, Identifier [Axis]: Tedder Industries, 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 459    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 15,120    
Gross Additions 3    
Gross Reductions 0    
Ending balance 15,123    
Investment, Identifier [Axis]: Televerde, LLC, Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 1,191 (731)  
Amount of Interest, Fees or Dividends Credited to Income 171 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 5,408 7,280  
Gross Additions 1,191 0  
Gross Reductions 0 1,808  
Ending balance 6,599 5,472  
Investment, Identifier [Axis]: Televerde, LLC, Preferred 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 1,794 0  
Gross Additions 0 1,794  
Gross Reductions 0 0  
Ending balance 1,794 1,794  
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 590  
Amount of Interest, Fees or Dividends Credited to Income 80 122  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 6,400 6,400  
Gross Additions 0 590  
Gross Reductions 0 0  
Ending balance 6,400 $ 6,990  
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate   7.00% 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 7 14  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 106 262  
Gross Additions 1,321 1,521  
Gross Reductions 1,440 720  
Ending balance $ (13) $ 1,063  
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.00% 11.83% 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 293 390  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 9,442 12,834  
Gross Additions 7 7  
Gross Reductions 200 0  
Ending balance 9,249 12,841  
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 1,510 0  
Amount of Interest, Fees or Dividends Credited to Income 29 29  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,800 8,660  
Gross Additions 1,506 0  
Gross Reductions 0 0  
Ending balance 9,306 $ 8,660  
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate   12.00%  
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   (7)  
Amount of Interest, Fees or Dividends Credited to Income   269  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   8,712  
Gross Additions   8  
Gross Reductions   407  
Ending balance   8,313  
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) (1)    
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 1    
Gross Reductions 1    
Ending balance $ 0    
Investment, Identifier [Axis]: Trantech Radiator Topco, 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) (5)    
Amount of Interest, Fees or Dividends Credited to Income 242    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 7,920    
Gross Additions 5    
Gross Reductions 5    
Ending balance $ 7,920    
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.16% [2],[4],[9]   11.57% [1],[6],[7]
Spread 8.40% [2],[4],[9]   1.25% [1],[6],[7]
PIK Rate 7.25% [2],[4],[9]   7.25% [1],[6],[7]
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.38% [3],[4]   9.82% [5],[7]
Spread 5.75% [3],[4]   5.75% [5],[7]
Investment, Identifier [Axis]: UniTek Global Services, Inc., 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 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 1      
Schedule of Investments [Line Items]      
Total Rate 20.00% [2],[21]   20.00% [1],[23]
PIK Rate 20.00% [2],[21]   20.00% [1],[23]
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) (107) (87)  
Amount of Interest, Fees or Dividends Credited to Income 107 88  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,833 2,833  
Gross Additions 107 88  
Gross Reductions 107 88  
Ending balance $ 2,833 2,833  
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 2      
Schedule of Investments [Line Items]      
Total Rate 20.00% [2]   20.00% [1]
PIK Rate 20.00% [2]   20.00% [1]
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 385 337  
Amount of Interest, Fees or Dividends Credited to Income 0 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,991 1,498  
Gross Additions 385 337  
Gross Reductions 0 0  
Ending balance $ 2,376 $ 1,835  
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 3      
Schedule of Investments [Line Items]      
Total Rate 19.00% [2]   19.00% [1]
PIK Rate 19.00% [2]   19.00% [1]
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]: UniTek Global Services, Inc., Preferred Stock 4      
Schedule of Investments [Line Items]      
Total Rate 13.50% [2]   13.50% [1]
PIK Rate 13.50% [2]   13.50% [1]
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]: UniTek Global Services, Inc., Secured Convertible Debt      
Schedule of Investments [Line Items]      
Total Rate 15.00% [2] 15.00% 15.00% [1]
PIK Rate 15.00% [2] 15.00% 15.00% [1]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 262 (80)  
Amount of Interest, Fees or Dividends Credited to Income 91 47  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 4,592 2,375  
Gross Additions 353 47  
Gross Reductions 0 34  
Ending balance $ 4,945 $ 2,388  
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 14.22% [2],[4],[9] 8.50% 10.76% [1],[6],[7]
Spread 7.50% [2],[4],[9] 5.50% 5.50% [1],[6],[7]
PIK Rate 2.00% [2],[4],[9] 2.00% 2.00% [1],[6],[7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 23 0  
Amount of Interest, Fees or Dividends Credited to Income 12 9  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 382 371  
Gross Additions 25 2  
Gross Reductions 0 0  
Ending balance $ 407 $ 373  
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 14.22% [2],[4],[9] 8.50% 10.76% [1],[6],[7]
Spread 7.50% [2],[4],[9] 5.50% 5.50% [1],[6],[7]
PIK Rate 2.00% [2],[4],[9] 2.00% 2.00% [1],[6],[7]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 102 0  
Amount of Interest, Fees or Dividends Credited to Income 62 43  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 1,712 1,852  
Gross Additions 112 12  
Gross Reductions 3 0  
Ending balance 1,821 1,864  
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP, LP Interests      
Schedule of Investments [Line Items]      
Total Rate [23],[34],[35],[36]     11.11%
Amount of Realized Gain/(Loss) 0 0  
Amount of Unrealized Gain/(Loss) 0 (1,885)  
Amount of Interest, Fees or Dividends Credited to Income 0 236  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 5,855 6,123  
Gross Additions 530 0  
Gross Reductions 197 4,470  
Ending balance 6,188 1,653  
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, 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 0    
Gross Reductions 0    
Ending balance $ 0    
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Total Rate 14.00% [3],[22]   14.00% [5],[24]
PIK Rate 14.00% [3],[22]   14.00% [5],[24]
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 220    
Gross Additions 0    
Gross Reductions 2    
Ending balance $ 218    
Investment, Identifier [Axis]: UserZoom Technologies, Inc., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate [3],[4],[9] 12.13%    
Spread [3],[4],[9] 7.50%    
Investment, Identifier [Axis]: VVS Holdco LLC, Preferred Equity      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) 100 0  
Amount of Interest, Fees or Dividends Credited to Income 38 150  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 11,940 11,840  
Gross Additions 100 0  
Gross Reductions 0 0  
Ending balance $ 12,040 $ 11,840  
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate   7.00%  
Spread 6.00% [4],[11],[22] 6.00% 6.00% [7],[8],[24]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 8 21  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance (21) 1,169  
Gross Additions 6 1  
Gross Reductions 0 400  
Ending balance $ (15) $ 770  
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.50% [22] 11.50% 11.50% [24]
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 889 889  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 30,161 30,100  
Gross Additions 15 15  
Gross Reductions 0 0  
Ending balance $ 30,176 30,115  
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 5.25% [2],[4],[11]   5.25% [1],[7],[8]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.83% [2],[4]   10.41% [1],[7]
Spread 6.00% [2],[4]   6.00% [1],[7]
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate [1]     10.38%
Spread [1]     6.00%
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [2] 10.63%    
Spread [2] 6.00%    
Investment, Identifier [Axis]: Vision Interests, Inc., Series A Preferred 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 168 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 3,000 3,000  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance 3,000 3,000  
Investment, Identifier [Axis]: Volusion, LLC, Common Stock      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) (2,576)    
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 2,576    
Gross Reductions 2,576    
Ending balance 0    
Investment, Identifier [Axis]: Volusion, 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   5,989  
Gross Additions   0  
Gross Reductions   0  
Ending balance   $ 5,989  
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 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 0    
Gross Additions 0    
Gross Reductions 0    
Ending balance 0    
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 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 0    
Gross Additions 11,446    
Gross Reductions 0    
Ending balance 11,446    
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 3      
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]: Volusion, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 10.00% 11.50% 11.50% [20]
Amount of Realized Gain/(Loss)   $ 0  
Amount of Unrealized Gain/(Loss)   0  
Amount of Interest, Fees or Dividends Credited to Income   496  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance   17,434  
Gross Additions   0  
Gross Reductions   350  
Ending balance   $ 17,084  
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 1      
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 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0    
Gross Additions 2,100    
Gross Reductions 0    
Ending balance 2,100    
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) (3,188)    
Amount of Unrealized Gain/(Loss) 1,821    
Amount of Interest, Fees or Dividends Credited to Income 166    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 14,914    
Gross Additions 0    
Gross Reductions 14,914    
Ending balance 0    
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt      
Schedule of Investments [Line Items]      
Total Rate   8.00% 8.00%
Amount of Realized Gain/(Loss) (409) $ 0  
Amount of Unrealized Gain/(Loss) 409 0  
Amount of Interest, Fees or Dividends Credited to Income 0 8  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 0 409  
Gross Additions 409 0  
Gross Reductions 409 0  
Ending balance 0 409  
Investment, Identifier [Axis]: Volusion, LLC, Warrants      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) 0    
Amount of Unrealized Gain/(Loss) 2,576    
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]: Wahoo Fitness Acquisition L.L.C., Secured Debt      
Schedule of Investments [Line Items]      
Total Rate [1],[6],[7]     10.64%
Spread [1],[6],[7]     5.75%
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [2],[4],[9] 14.93%    
Spread [2],[4],[9] 5.25%    
PIK Rate [2],[4],[9] 4.75%    
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate [2],[4],[9],[12] 10.64%    
Spread [2],[4],[9],[12] 5.75%    
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 7.00% [3],[4],[11]   7.00% [5],[7],[8]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 11.75% [3],[4]   10.74% [5],[7]
Spread 7.00% [3],[4]   7.00% [5],[7]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 11.07% [3],[4],[61]   10.73% [5],[7]
Spread 6.25% [3],[4],[61]   6.00% [5],[7]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.98% [3],[4]   10.73% [5],[7]
Spread 6.00% [3],[4]   6.00% [5],[7]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 10.98% [3],[4]   10.73% [5],[7]
Spread 6.25% [3],[4]   6.00% [5],[7]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 6.00% [3],[4],[9],[11]   6.00% [5],[6],[7],[8]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.79% [3],[4],[9]   8.59% [5],[6],[7]
Spread 6.00% [3],[4],[9]   6.00% [5],[6],[7]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Spread 7.00% [3],[4],[11]   7.00% [5],[7],[8]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Spread 7.00% [3],[4],[11]   7.00% [5],[7],[8]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 11.75% [3],[4]   10.74% [5],[7]
Spread 7.00% [3],[4]   7.00% [5],[7]
Investment, Identifier [Axis]: World Micro Holdings, LLC, Preferred Equity      
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 3,845    
Gross Additions 0    
Gross Reductions 0    
Ending balance $ 3,845    
Investment, Identifier [Axis]: World Micro Holdings, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 13.00%   13.00%
Amount of Realized Gain/(Loss) $ 0    
Amount of Unrealized Gain/(Loss) 0    
Amount of Interest, Fees or Dividends Credited to Income 471    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 14,140    
Gross Additions 7    
Gross Reductions 0    
Ending balance $ 14,147    
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate [3] 9.92%    
Spread 5.25% [3]   5.25% [5],[8]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 10.34% [3]   10.84% [5]
Spread 5.25% [3]   5.25% [5]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 10.35% [3]   8.63% [5]
Spread 5.25% [3]   5.25% [5]
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt      
Schedule of Investments [Line Items]      
Total Rate 14.50% [2],[4]   9.51% [1],[7]
Spread 6.00% [2],[4]   5.50% [1],[7]
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Preferred Member Units      
Schedule of Investments [Line Items]      
Amount of Realized Gain/(Loss) $ 0 0  
Amount of Unrealized Gain/(Loss) (170) 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 240 2,130  
Gross Additions 0 0  
Gross Reductions 170 0  
Ending balance $ 70 $ 2,130  
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 1      
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) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 14 19  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 450 625  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 450 $ 625  
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 6.50% 6.50% 6.50%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) 0 0  
Amount of Interest, Fees or Dividends Credited to Income 16 16  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 945 1,000  
Gross Additions 0 0  
Gross Reductions 0 0  
Ending balance $ 945 $ 1,000  
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 3      
Schedule of Investments [Line Items]      
Total Rate 14.00% 14.00% 14.00%
Amount of Realized Gain/(Loss) $ 0 $ 0  
Amount of Unrealized Gain/(Loss) (215) 0  
Amount of Interest, Fees or Dividends Credited to Income 96 96  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Beginning balance 2,676 2,750  
Gross Additions 0 0  
Gross Reductions 215 0  
Ending balance 2,461 $ 2,750  
Investment, Identifier [Axis]: Ziegler’s NYPD, 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]: Zips Car Wash, LLC, Secured Debt 1      
Schedule of Investments [Line Items]      
Total Rate 12.15% [3],[4],[9],[49]   11.67% [5],[6],[7]
Spread 7.25% [3],[4],[9],[49]   7.25% [5],[6],[7]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 2      
Schedule of Investments [Line Items]      
Total Rate 12.12% [3],[4],[9],[49]   11.67% [5],[6],[7],[60]
Spread 7.25% [3],[4],[9],[49]   7.25% [5],[6],[7],[60]
[1] Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments.
[2] Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments.
[3] Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments.
[4] Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 92% of the loans (based on the par amount) contain LIBOR or Term SOFR (“SOFR”) floors which range between 0.50% and 2.00%, with a weighted-average floor of 1.08%.
[5] Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments.
[6] A majority of the variable rate loans in the Company’s Investment Portfolio bear interest at a rate that may be determined by reference to either LIBOR (“L”), SOFR (“SF”) or an alternate Base rate (commonly based on the Federal Funds Rate or the Prime rate (“P”)), which typically resets every one, three, or six months at the borrower’s option. SOFR based contracts may include a credit spread adjustment (the “Adjustment”) that is charged in addition to the stated spread. The Adjustment is applied when the SOFR rate, plus the Adjustment, exceeds the stated floor rate, as applicable. As of December 31, 2022, SOFR based contracts in the portfolio had Adjustments ranging from 0.10% to 0.35%.
[7] Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 66% of these floating rate loans (based on the par amount) contain LIBOR or Term SOFR (“SOFR”) floors which range between 0.50% and 2.00%, with a weighted-average floor of 1.04%.
[8] The position is unfunded and no interest income is being earned as of December 31, 2022. The position may earn a nominal unused facility fee on committed amounts.
[9] A majority of the variable rate loans in the Company’s investment portfolio bear interest at a rate that may be determined by reference to either LIBOR (“L”), SOFR (“SF”) or an alternate Base Rate (commonly based on the Federal Funds Rate or the Prime Rate (“P”)), which typically resets every one, three, or six months at the borrower’s option. SOFR based contracts may include a credit spread adjustment (the “Adjustment”) that is charged in addition to the stated spread. The Adjustment is applied when the SOFR rate, plus the Adjustment, exceeds the stated floor rate, as applicable. As of March 31, 2023, SOFR based contracts in the portfolio had Adjustments ranging from 0.10% to 0.35%.
[10] As of March 31, 2023, borrowings under the loan facility bore interest at SOFR+6.00% (Floor 1.00%). Each new draw or funding on the delayed draw term loan facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of March 31, 2023.
[11] The position is unfunded and no interest income is being earned as of March 31, 2023. The position may earn a nominal unused facility fee on committed amounts.
[12] Non-accrual and non-income producing investment.
[13] Non-accrual and non-income producing investment.
[14] Index based floating interest rate is subject to contractual maximum base rate of 3.50%.
[15] Index based floating interest rate is subject to contractual maximum base rate of 2.50%.
[16] Index based floating interest rate is subject to contractual maximum base rate of 2.50%
[17] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of Prime+5.10% (Floor 2.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[18] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of SOFR+6.00% (Floor 1.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[19] Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.
[20] Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.
[21] Income producing through dividends or distributions.
[22] Shares/Units represent ownership in a related Real Estate or HoldCo entity.
[23] Income producing through dividends or distributions.
[24] Shares/Units represent ownership in a related Real Estate or HoldCo entity.
[25] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of SOFR+8.00% (Floor 1.50%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[26] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of SOFR+8.00% (Floor 1.50%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[27] The security has an effective contractual interest rate of 2.00% PIK + LIBOR+6.50%, Floor 1.00%, but the issuer may, in its discretion, elect to pay the PIK interest in cash. The rate presented represents the effective current yield based on actual payments received during the period.
[28] As of March 31, 2023, borrowings under the loan facility bore interest at SOFR+6.25% (Floor 1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of March 31, 2023.
[29] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+6.25% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[30] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+6.25% (Floor 1.00%). Due to an amendment and subsequent funding during the quarter, the term loan facility has different floating rate reset dates. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[31] As of March 31, 2023, borrowings under the loan facility bore interest at LIBOR+7.50% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of March 31, 2023.
[32] As of December 31, 2022, borrowings under the loan facility bore interest at LIBOR+8.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[33] As of March 31, 2023, borrowings under the loan facility bore interest at SOFR+7.50% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of March 31, 2023.
[34] Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments.
[35] Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.
[36] Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated.
[37] As of March 31, 2023, borrowings under the loan facility bore interest at SOFR+6.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of March 31, 2023.
[38] Index based floating interest rate is subject to contractual maximum base rate of 3.00%.
[39] Index based floating interest rate is subject to contractual maximum base rate of 2.00%.
[40] Index based floating interest rate is subject to contractual maximum base rate of 1.50%.
[41] Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.
[42] Portfolio company headquarters are located outside of the United States.
[43] Portfolio company headquarters are located outside of the United States.
[44] Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments.
[45] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+5.75% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[46] As of December 31, 2022, borrowings under the loan facility bore interest at LIBOR+6.50% PIK or Prime+5.50% PIK. Revolving facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[47] As of December 31, 2022, borrowings under the loan facility bore interest at LIBOR+10.00%. RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[48] As of March 31, 2023, borrowings under the loan facility bore interest at LIBOR+6.50% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of March 31, 2023.
[49] As of March 31, 2023, borrowings under the loan facility bear interest at SOFR+7.25% (Floor 1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of March 31, 2023.
[50] As of December 31, 2022, borrowings under the loan facility bore interest at LIBOR+7.25% (Floor 0.75%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[51] As of March 31, 2023, borrowings under the loan facility bore interest at SOFR+8.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of March 31, 2023.
[52] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+8.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[53] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+5.75% (Floor 1.00%). Delayed draw term loan facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[54] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+7.75% (Floor 1.25%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[55] Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.
[56] In connection with the Company's debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company’s investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $16.2 million Canadian Dollars and receive $12.5 million U.S. Dollars with a settlement date of September 14, 2023. The unrealized appreciation on the forward foreign currency contract was $0.5 million as of March 31, 2023
[57] In connection with the Company’s debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company’s investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $16.9 million Canadian Dollars and receive $13.1 million U.S. Dollars with a settlement date of September 14, 2023. The unrealized appreciation on the forward foreign currency contract was $0.6 million as of December 31, 2022.
[58] Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of short-term portfolio investments.
[59] Short-term portfolio investments. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of short-term portfolio investments.
[60] As of December 31, 2022, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). Each new draw on the delayed draw term loan facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2022.
[61] As of March 31, 2023, borrowings under the loan facility bore interest at LIBOR+6.25% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of March 31, 2023.