v3.23.3
Schedule 12-14 - Schedule of Investments in and Advances to Affiliates (Details)
€ in Thousands, £ in Thousands, $ in Thousands
 12 Months Ended
Sep. 30, 2023
USD ($)
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Sep. 30, 2022
USD ($)
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Sep. 30, 2023
EUR (€)
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Sep. 30, 2023
GBP (£)
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Sep. 30, 2022
EUR (€)
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Sep. 30, 2022
GBP (£)
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Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance $ 2,494,111          
Fair Value, Ending Balance $ 2,892,420 $ 2,494,111        
Investment owned, percent of net assets 190.82% 200.24% 190.82% 190.82% 200.24% 200.24%
Affiliate investments            
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance $ 26,196          
Fair Value, Ending Balance 23,349 $ 26,196        
Control investments            
Schedule of Investments [Line Items]            
Investment owned, ownership percentage [1],[2]   17.20%     17.20% 17.20%
Investment owned, balance, principal amount 209,970 $ 170,245        
Net Realized Gain (Loss) 0 1,868        
Amount of Interest, Fees or Dividends Credited in Income 25,763 20,459        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 214,165 [1],[2] 270,765        
Gross Additions 91,786 1,538        
Gross Reductions (8,860) (58,138)        
Fair Value, Ending Balance $ 297,091 [3],[4] $ 214,165 [1],[2]        
Investment owned, percent of net assets 19.60% [3],[4] 17.20% 19.60% [3],[4] 19.60% [3],[4] 17.20% 17.20%
Affiliate Investments            
Schedule of Investments [Line Items]            
Investment, interest rate [5]   2.10%     2.10% 2.10%
Investment owned, balance, principal amount $ 21,852 $ 24,490        
Net Realized Gain (Loss) 0 0        
Amount of Interest, Fees or Dividends Credited in Income 2,640 1,764        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 26,196 [5] 18,289        
Gross Additions 2,700 15,067        
Gross Reductions (5,547) (7,160)        
Fair Value, Ending Balance $ 23,349 [6] $ 26,196 [5]        
Investment owned, percent of net assets 1.50% [6] 2.10% 1.50% [6] 1.50% [6] 2.10% 2.10%
Investment, Affiliated Issuer, Control and Affiliate            
Schedule of Investments [Line Items]            
Investment owned, balance, principal amount $ 231,822 $ 194,735        
Net Realized Gain (Loss) 0 1,868        
Amount of Interest, Fees or Dividends Credited in Income 28,403 22,223        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 240,361 289,054        
Gross Additions 94,486 16,605        
Gross Reductions (14,407) (65,298)        
Fair Value, Ending Balance $ 320,440 $ 240,361        
Investment owned, percent of net assets 21.10% 19.30% 21.10% 21.10% 19.30% 19.30%
Investment, Identifier [Axis]: 107 Fair Street LLC, Real Estate Development, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[9],[10],[11],[12] 12.50%   12.50% 12.50%    
Investment owned, balance, principal amount [7],[9],[10],[12],[13] $ 1,269          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[12] $ 1,214          
Investment, Identifier [Axis]: 107-109 Beech OAK22 LLC, Real Estate Development, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[9],[10],[11] 11.00%   11.00% 11.00%    
Investment owned, balance, principal amount [7],[9],[10],[13] $ 18,869          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10] 18,443          
Investment, Identifier [Axis]: 109 Montgomery Owner LLC, Real Estate Operating Companies, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   7.00%     7.00% 7.00%
Investment, interest rate [14],[15],[16],[17]   9.80%     9.80% 9.80%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 389        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 727          
Fair Value, Ending Balance [14],[15],[16]   $ 727        
Investment, Identifier [Axis]: 109 Montgomery Owner LLC, Real Estate Operating Companies, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   7.00%     7.00% 7.00%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] $ 0          
Fair Value, Ending Balance [14],[15],[16],[19]   $ 0        
Investment, Identifier [Axis]: 112-126 Van Houten Real22 LLC, Real Estate Development, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[9],[10],[11],[12] 12.00%   12.00% 12.00%    
Investment owned, balance, principal amount [7],[9],[10],[12],[13] $ 4,070          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[12] $ 4,022          
Investment, Identifier [Axis]: A.T. Holdings II Ltd., Biotechnology, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[10],[11],[20],[21] 14.25%   14.25% 14.25%    
Investment owned, balance, principal amount [7],[10],[13],[20],[21] $ 21,434          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20],[21] $ 21,220          
Investment, Identifier [Axis]: A.T. Holdings II SÀRL, Biotechnology, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate, paid in kind 20.00% [7],[10],[20] 10.50% [14],[15],[22] 20.00% [7],[10],[20] 20.00% [7],[10],[20] 10.50% [14],[15],[22] 10.50% [14],[15],[22]
Investment owned, balance, principal amount $ 6,021 [7],[10],[13],[20] $ 33,997 [14],[15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] 34,891          
Fair Value, Ending Balance 5,900 [7],[10],[20] $ 34,891 [14],[15],[22]        
Investment, Identifier [Axis]: ADB Companies, LLC, Construction & Engineering, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   6.25%     6.25% 6.25%
Investment, interest rate [14],[15],[16],[17]   9.80%     9.80% 9.80%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 14,685        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 14,431          
Fair Value, Ending Balance [14],[15],[16]   $ 14,431        
Investment, Identifier [Axis]: ADB Companies, LLC, Construction & Engineering, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11] 11.90%   11.90% 11.90%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 3,446          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 3,383          
Investment, Identifier [Axis]: ADB Companies, LLC, Construction & Engineering, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11] 12.15%   12.15% 12.15%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 17,901          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 17,575          
Investment, Identifier [Axis]: ADB Companies, LLC, Construction & Engineering, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11] 12.13%   12.13% 12.13%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 963          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 945          
Investment, Identifier [Axis]: ADC Therapeutics SA, Biotechnology, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.50% [7],[10],[11],[20] 7.50% [14],[15],[16],[22] 7.50% [7],[10],[11],[20] 7.50% [7],[10],[11],[20] 7.50% [14],[15],[16],[22] 7.50% [14],[15],[16],[22]
Investment, interest rate 13.04% [7],[8],[10],[11],[20] 11.20% [14],[15],[16],[17],[22] 13.04% [7],[8],[10],[11],[20] 13.04% [7],[8],[10],[11],[20] 11.20% [14],[15],[16],[17],[22] 11.20% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount $ 6,589 [7],[10],[11],[13],[20] $ 6,589 [14],[15],[16],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] 6,262          
Fair Value, Ending Balance $ 6,276 [7],[10],[11],[20] $ 6,262 [14],[15],[16],[22]        
Investment, Identifier [Axis]: ADC Therapeutics SA, Biotechnology, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.50% [7],[9],[10],[20] 7.50% [14],[15],[16],[19],[22] 7.50% [7],[9],[10],[20] 7.50% [7],[9],[10],[20] 7.50% [14],[15],[16],[19],[22] 7.50% [14],[15],[16],[19],[22]
Investment owned, balance, principal amount $ 0 [7],[9],[10],[11],[13],[20] $ 0 [14],[15],[16],[18],[19],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19],[22] (37)          
Fair Value, Ending Balance $ (38) [7],[9],[10],[11],[20] $ (37) [14],[15],[16],[19],[22]        
Investment, Identifier [Axis]: ADC Therapeutics SA, Biotechnology, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 28,948 [7],[10],[20] 28,948 [14],[15],[22] 28,948 [7],[10],[20] 28,948 [7],[10],[20] 28,948 [14],[15],[22] 28,948 [14],[15],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 73          
Fair Value, Ending Balance $ 6 [7],[10],[20] $ 73 [14],[15],[22]        
Investment, Identifier [Axis]: AI Sirona (Luxembourg) Acquisition S.a.r.l., Pharmaceuticals, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [10],[11],[20] 5.00%   5.00% 5.00%    
Investment, interest rate [8],[10],[11],[20] 8.86%   8.86% 8.86%    
Investment owned, balance, principal amount | € [10],[11],[13],[20]     € 5,500      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[11],[20] $ 5,825          
Investment, Identifier [Axis]: AI Sirona (Luxembourg) Acquisition S.a.r.l., Pharmaceuticals, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[22]   7.25%     7.25% 7.25%
Investment, interest rate [14],[15],[16],[17],[22]   7.94%     7.94% 7.94%
Investment owned, balance, principal amount | € [14],[15],[16],[18],[22]         € 24,838  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] $ 22,143          
Fair Value, Ending Balance [14],[15],[16],[22]   $ 22,143        
Investment, Identifier [Axis]: AIP RD Buyer Corp., Distributors, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 17,870 [7],[10] 14,410 [14],[15] 17,870 [7],[10] 17,870 [7],[10] 14,410 [14],[15] 14,410 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 1,291          
Fair Value, Ending Balance $ 2,826 [7],[10] $ 1,291 [14],[15]        
Investment, Identifier [Axis]: AIP RD Buyer Corp., Distributors, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.75% [7],[10],[11] 7.75% [14],[15],[16] 7.75% [7],[10],[11] 7.75% [7],[10],[11] 7.75% [14],[15],[16] 7.75% [14],[15],[16]
Investment, interest rate 13.17% [7],[8],[10],[11] 10.88% [14],[15],[16],[17] 13.17% [7],[8],[10],[11] 13.17% [7],[8],[10],[11] 10.88% [14],[15],[16],[17] 10.88% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 17,873 [7],[10],[11],[13] $ 14,414 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 13,910          
Fair Value, Ending Balance 17,687 [7],[10],[11] $ 13,910 [14],[15],[16]        
Investment, Identifier [Axis]: APX Group Inc., Electrical Components & Equipment, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17],[22]   5.75%     5.75% 5.75%
Investment owned, balance, principal amount [15],[18],[22]   $ 2,075        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] 1,645          
Fair Value, Ending Balance [15],[22]   $ 1,645        
Investment, Identifier [Axis]: ASP Unifrax Holdings, Inc., Trading Companies & Distributors, Fixed Rate Bond 1            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17]   7.50%     7.50% 7.50%
Investment owned, balance, principal amount [15],[18]   $ 5,500        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15] 3,641          
Fair Value, Ending Balance [15]   $ 3,641        
Investment, Identifier [Axis]: ASP Unifrax Holdings, Inc., Trading Companies & Distributors, Fixed Rate Bond 2            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17]   5.25%     5.25% 5.25%
Investment owned, balance, principal amount [15],[18]   $ 2,500        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15] $ 1,926          
Fair Value, Ending Balance [15]   $ 1,926        
Investment, Identifier [Axis]: ASP-R-PAC Acquisition Co LLC, Paper & Plastic Packaging Products & Materials, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11],[20] 6.00%   6.00% 6.00%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13],[20] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11],[20] $ (23)          
Investment, Identifier [Axis]: ASP-R-PAC Acquisition Co LLC, Paper & Plastic Packaging Products & Materials, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 6.00%   6.00% 6.00%    
Investment, interest rate [7],[8],[10],[11],[20] 11.63%   11.63% 11.63%    
Investment owned, balance, principal amount [7],[10],[11],[13],[20] $ 3,276          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] 3,084          
Investment, Identifier [Axis]: ATNX SPV, LLC, Pharmaceuticals, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment owned, balance, principal amount [7],[10],[13],[20],[21] 12,222          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20],[21] 11,795          
Investment, Identifier [Axis]: Access CIG, LLC, Diversified Support Services, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   7.75%     7.75% 7.75%
Investment, interest rate [15],[16],[17]   10.82%     10.82% 10.82%
Investment owned, balance, principal amount [15],[16],[18]   $ 20,000        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 19,075          
Fair Value, Ending Balance [15],[16]   $ 19,075        
Investment, Identifier [Axis]: Accupac, Inc., Personal Care Products, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 6.00%   6.00% 6.00%    
Investment, interest rate [7],[8],[9],[10],[11] 11.55%   11.55% 11.55%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 2,033          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ 2,027          
Investment, Identifier [Axis]: Accupac, Inc., Personal Care Products, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.00%   6.00% 6.00%    
Investment, interest rate [7],[8],[10],[11] 11.55%   11.55% 11.55%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 20,234          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 20,194          
Investment, Identifier [Axis]: Accupac, Inc., Personal Care Products, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 6.00%   6.00% 6.00%    
Investment, interest rate [7],[8],[9],[10],[11]      
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] (8)          
Investment, Identifier [Axis]: Accupac, Inc., Personal Products, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   5.50%     5.50% 5.50%
Investment, interest rate [14],[15],[16],[17],[19]   9.14%     9.14% 9.14%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 500        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 495          
Fair Value, Ending Balance [14],[15],[16],[19]   $ 495        
Investment, Identifier [Axis]: Accupac, Inc., Personal Products, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   5.50%     5.50% 5.50%
Investment, interest rate [14],[15],[16],[17]   9.12%     9.12% 9.12%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 15,976        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 15,944          
Fair Value, Ending Balance [14],[15],[16]   $ 15,944        
Investment, Identifier [Axis]: Accupac, Inc., Personal Products, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   5.50%     5.50% 5.50%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] $ (6)          
Fair Value, Ending Balance [14],[15],[16],[19]   $ (6)        
Investment, Identifier [Axis]: Acquia Inc., Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [7],[9],[10],[11] 7.00% [14],[15],[16],[19] 7.00% [7],[9],[10],[11] 7.00% [7],[9],[10],[11] 7.00% [14],[15],[16],[19] 7.00% [14],[15],[16],[19]
Investment, interest rate 12.72% [7],[8],[9],[10],[11] 10.64% [14],[15],[16],[17],[19] 12.72% [7],[8],[9],[10],[11] 12.72% [7],[8],[9],[10],[11] 10.64% [14],[15],[16],[17],[19] 10.64% [14],[15],[16],[17],[19]
Investment owned, balance, principal amount $ 1,333 [7],[9],[10],[11],[13] $ 914 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 898          
Fair Value, Ending Balance 1,324 [7],[9],[10],[11] $ 898 [14],[15],[16],[19]        
Investment, Identifier [Axis]: Acquia Inc., Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   7.00%     7.00% 7.00%
Investment, interest rate [14],[15],[16],[17]   9.63%     9.63% 9.63%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 27,349        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 27,158          
Fair Value, Ending Balance [14],[15],[16]   $ 27,158        
Investment, Identifier [Axis]: Acquia Inc., Application Software, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.00%   7.00% 7.00%    
Investment, interest rate [7],[8],[10],[11] 12.34%   12.34% 12.34%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 6,400          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 6,380          
Investment, Identifier [Axis]: Acquia Inc., Application Software, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.00%   7.00% 7.00%    
Investment, interest rate [7],[8],[10],[11] 12.34%   12.34% 12.34%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 25,332          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 25,253          
Investment, Identifier [Axis]: Aden & Anais Merger Sub, Inc., Apparel, Accessories & Luxury Goods, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15]   51,645     51,645 51,645
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 0          
Fair Value, Ending Balance [14],[15]   $ 0        
Investment, Identifier [Axis]: AirStrip Technologies, Inc., Application Software, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 5,715 [7],[10] 5,715 [14],[15] 5,715 [7],[10] 5,715 [7],[10] 5,715 [14],[15] 5,715 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 0          
Fair Value, Ending Balance 0 [7],[10] $ 0 [14],[15]        
Investment, Identifier [Axis]: All Web Leads, Inc., Advertising, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   8.50%     8.50% 8.50%
Investment, interest rate, paid in kind [14],[15],[16]   11.64%     11.64% 11.64%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 23,338        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 22,141          
Fair Value, Ending Balance [14],[15],[16]   $ 22,141        
Investment, Identifier [Axis]: All Web Leads, Inc., First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[23] 8.50%   8.50% 8.50%    
Investment owned, balance, principal amount [7],[10],[11],[13],[23] $ 23,562          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[23] $ 9,797          
Investment, Identifier [Axis]: Altice France S.A., Integrated Telecommunication Services, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate 5.50% [8],[10],[11],[20] 5.50% [15],[16],[17],[22] 5.50% [8],[10],[11],[20] 5.50% [8],[10],[11],[20] 5.50% [15],[16],[17],[22] 5.50% [15],[16],[17],[22]
Investment owned, balance, principal amount $ 4,050 [10],[13],[20] $ 4,050 [15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] 3,057          
Fair Value, Ending Balance $ 2,918 [10],[20] $ 3,057 [15],[22]        
Investment, Identifier [Axis]: Alto Pharmacy Holdings, Inc., Health Care Technology, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 11.50%   11.50% 11.50%    
Investment, interest rate [7],[8],[10],[11] 5.00%   5.00% 5.00%    
Investment, interest rate, paid in kind [7],[10],[11] 11.99%   11.99% 11.99%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 9,057          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 8,332          
Investment, Identifier [Axis]: Alto Pharmacy Holdings, Inc., Health Care Technology, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10] 598,283   598,283 598,283    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10] $ 1,915          
Investment, Identifier [Axis]: Alvogen Pharma US, Inc., Pharmaceuticals, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.50% [7],[10],[11] 7.50% [14],[15],[16] 7.50% [7],[10],[11] 7.50% [7],[10],[11] 7.50% [14],[15],[16] 7.50% [14],[15],[16]
Investment, interest rate 13.04% [7],[8],[10],[11] 11.20% [14],[15],[16],[17] 13.04% [7],[8],[10],[11] 13.04% [7],[8],[10],[11] 11.20% [14],[15],[16],[17] 11.20% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 17,053 [7],[10],[11],[13] $ 13,134 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 13,068          
Fair Value, Ending Balance 15,929 [7],[10],[11] $ 13,068 [14],[15],[16]        
Investment, Identifier [Axis]: Alvotech Holdings S.A., Biotechnology, Fixed Rate Bond 1            
Schedule of Investments [Line Items]            
Investment, interest rate [14],[15],[16],[17],[22]   10.00%     10.00% 10.00%
Investment owned, balance, principal amount [14],[15],[18],[22]   $ 24,043        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 23,923          
Fair Value, Ending Balance [14],[15],[22]   $ 23,923        
Investment, Identifier [Axis]: Alvotech Holdings S.A., Biotechnology, Common Stock 1            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 471,253 [10],[20] 587,930 [15],[22] 471,253 [10],[20] 471,253 [10],[20] 587,930 [15],[22] 587,930 [15],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] $ 3,974          
Fair Value, Ending Balance $ 4,298 [10],[20] $ 3,974 [15],[22]        
Investment, Identifier [Axis]: Alvotech Holdings S.A., Biotechnology, Common Stock 2            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 141,640 [7],[10],[20],[24] 124,780 [14],[15],[22],[25] 141,640 [7],[10],[20],[24] 141,640 [7],[10],[20],[24] 124,780 [14],[15],[22],[25] 124,780 [14],[15],[22],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22],[25] $ 212          
Fair Value, Ending Balance $ 368 [7],[10],[20],[24] $ 212 [14],[15],[22],[25]        
Investment, Identifier [Axis]: Alvotech Holdings S.A., Biotechnology, First Lien Fixed Rate Bond 1            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[10],[11],[20] 8.50%   8.50% 8.50%    
Investment, interest rate, paid in kind [7],[10],[20] 3.50%   3.50% 3.50%    
Investment owned, balance, principal amount [7],[10],[13],[20] $ 28,464          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20] $ 27,687          
Investment, Identifier [Axis]: Alvotech Holdings S.A., Biotechnology, First Lien Fixed Rate Bond 2            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[10],[11],[20] 8.50%   8.50% 8.50%    
Investment, interest rate, paid in kind [7],[10],[20] 3.50%   3.50% 3.50%    
Investment owned, balance, principal amount [7],[10],[13],[20] $ 2,121          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20] $ 2,063          
Investment, Identifier [Axis]: Alvotech Holdings S.A., Biotechnology, First Lien Fixed Rate Bond 3            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[10],[11],[20] 8.50%   8.50% 8.50%    
Investment, interest rate, paid in kind [7],[10],[20] 3.50%   3.50% 3.50%    
Investment owned, balance, principal amount [7],[10],[13],[20] $ 27,692          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20] $ 26,936          
Investment, Identifier [Axis]: Alvotech Holdings S.A., Biotechnology, First Lien Fixed Rate Bond 4            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[10],[11],[20] 8.50%   8.50% 8.50%    
Investment, interest rate, paid in kind [7],[10],[20] 3.50%   3.50% 3.50%    
Investment owned, balance, principal amount [7],[10],[13],[20] $ 2,064          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20] 2,007          
Investment, Identifier [Axis]: Alvotech Holdings S.A., Biotechnology, Fixed Rate Bond 2            
Schedule of Investments [Line Items]            
Investment, interest rate [14],[15],[16],[17],[22]   10.00%     10.00% 10.00%
Investment owned, balance, principal amount [14],[15],[18],[22]   $ 23,522        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 23,404          
Fair Value, Ending Balance [14],[15],[22]   $ 23,404        
Investment, Identifier [Axis]: American Auto Auction Group, LLC, Consumer Finance, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.75% [7],[10],[11] 8.75% [14],[15],[16] 8.75% [7],[10],[11] 8.75% [7],[10],[11] 8.75% [14],[15],[16] 8.75% [14],[15],[16]
Investment, interest rate 14.14% [7],[8],[10],[11] 12.30% [14],[15],[16],[17] 14.14% [7],[8],[10],[11] 14.14% [7],[8],[10],[11] 12.30% [14],[15],[16],[17] 12.30% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 17,048 [7],[10],[11],[13] $ 14,760 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 13,284          
Fair Value, Ending Balance $ 15,087 [7],[10],[11] $ 13,284 [14],[15],[16]        
Investment, Identifier [Axis]: American Tire Distributors, Inc., Distributors, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.25% [10],[11] 6.25% [15],[16] 6.25% [10],[11] 6.25% [10],[11] 6.25% [15],[16] 6.25% [15],[16]
Investment, interest rate 11.81% [8],[10],[11] 9.03% [15],[16],[17] 11.81% [8],[10],[11] 11.81% [8],[10],[11] 9.03% [15],[16],[17] 9.03% [15],[16],[17]
Investment owned, balance, principal amount $ 19,115 [10],[11],[13] $ 9,895 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 9,293          
Fair Value, Ending Balance 16,798 [10],[11] $ 9,293 [15],[16]        
Investment, Identifier [Axis]: Amplify Finco Pty Ltd., Movies & Entertainment, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[22]   4.25%     4.25% 4.25%
Investment, interest rate [14],[15],[16],[17],[22]   7.92%     7.92% 7.92%
Investment owned, balance, principal amount [14],[15],[16],[18],[22]   $ 15,220        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] $ 14,687          
Fair Value, Ending Balance [14],[15],[16],[22]   $ 14,687        
Investment, Identifier [Axis]: Amplify Finco Pty Ltd., Movies & Entertainment, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.00% [7],[10],[11],[20] 8.00% [14],[15],[16],[22] 8.00% [7],[10],[11],[20] 8.00% [7],[10],[11],[20] 8.00% [14],[15],[16],[22] 8.00% [14],[15],[16],[22]
Investment, interest rate 13.54% [7],[8],[10],[11],[20] 11.67% [14],[15],[16],[17],[22] 13.54% [7],[8],[10],[11],[20] 13.54% [7],[8],[10],[11],[20] 11.67% [14],[15],[16],[17],[22] 11.67% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount $ 12,500 [7],[10],[11],[13],[20] $ 12,500 [14],[15],[16],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] 11,958          
Fair Value, Ending Balance $ 11,865 [7],[10],[11],[20] $ 11,958 [14],[15],[16],[22]        
Investment, Identifier [Axis]: Anastasia Parent, LLC, Personal Care Products, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [10],[11] 3.75%   3.75% 3.75%    
Investment, interest rate [8],[10],[11] 9.40%   9.40% 9.40%    
Investment owned, balance, principal amount [10],[11],[13] $ 3,700          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[11] 2,669          
Investment, Identifier [Axis]: Anastasia Parent, LLC, Personal Products, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   3.75%     3.75% 3.75%
Investment, interest rate [15],[16],[17]   7.42%     7.42% 7.42%
Investment owned, balance, principal amount [15],[16],[18]   $ 2,736        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 2,189          
Fair Value, Ending Balance [15],[16]   $ 2,189        
Investment, Identifier [Axis]: Ankura Consulting Group LLC, Research & Consulting Services, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   8.00%     8.00% 8.00%
Investment, interest rate [14],[15],[16],[17]   10.78%     10.78% 10.78%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 4,346        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 3,813          
Fair Value, Ending Balance [14],[15],[16]   $ 3,813        
Investment, Identifier [Axis]: Apptio, Inc., Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   6.00%     6.00% 6.00%
Investment, interest rate [14],[15],[16],[17],[19]   8.46%     8.46% 8.46%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 892        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 846          
Fair Value, Ending Balance [14],[15],[16],[19]   $ 846        
Investment, Identifier [Axis]: Apptio, Inc., Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   6.00%     6.00% 6.00%
Investment, interest rate [14],[15],[16],[17]   8.46%     8.46% 8.46%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 34,458        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 33,738          
Fair Value, Ending Balance [14],[15],[16]   $ 33,738        
Investment, Identifier [Axis]: Ardonagh Midco 3 PLC, Insurance Brokers, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [7],[10],[11],[20] 7.00% [14],[15],[16],[22] 7.00% [7],[10],[11],[20] 7.00% [7],[10],[11],[20] 7.00% [14],[15],[16],[22] 7.00% [14],[15],[16],[22]
Investment, interest rate 10.95% [7],[8],[10],[11],[20] 8.00% [14],[15],[16],[17],[22] 10.95% [7],[8],[10],[11],[20] 10.95% [7],[8],[10],[11],[20] 8.00% [14],[15],[16],[17],[22] 8.00% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount | €     € 3,017 [7],[10],[11],[13],[20]   € 1,964 [14],[15],[16],[18],[22]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] $ 1,927          
Fair Value, Ending Balance $ 3,226 [7],[10],[11],[20] $ 1,927 [14],[15],[16],[22]        
Investment, Identifier [Axis]: Ardonagh Midco 3 PLC, Insurance Brokers, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.75% [7],[10],[11],[20] 7.00% [14],[15],[16],[22] 5.75% [7],[10],[11],[20] 5.75% [7],[10],[11],[20] 7.00% [14],[15],[16],[22] 7.00% [14],[15],[16],[22]
Investment, interest rate 11.57% [7],[8],[10],[11],[20] 9.19% [14],[15],[16],[17],[22] 11.57% [7],[8],[10],[11],[20] 11.57% [7],[8],[10],[11],[20] 9.19% [14],[15],[16],[17],[22] 9.19% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount $ 10,519 [7],[10],[11],[13],[20]         £ 18,636 [14],[15],[16],[18],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] 20,826          
Fair Value, Ending Balance $ 10,624 [7],[10],[11],[20] $ 20,826 [14],[15],[16],[22]        
Investment, Identifier [Axis]: Ardonagh Midco 3 PLC, Insurance Brokers, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [7],[10],[11],[20] 5.75% [14],[15],[16],[22] 7.00% [7],[10],[11],[20] 7.00% [7],[10],[11],[20] 5.75% [14],[15],[16],[22] 5.75% [14],[15],[16],[22]
Investment, interest rate 12.46% [7],[8],[10],[11],[20] 8.81% [14],[15],[16],[17],[22] 12.46% [7],[8],[10],[11],[20] 12.46% [7],[8],[10],[11],[20] 8.81% [14],[15],[16],[17],[22] 8.81% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount   $ 10,519 [14],[15],[16],[18],[22]   £ 4,949 [7],[10],[11],[13],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] $ 10,328          
Fair Value, Ending Balance $ 6,101 [7],[10],[11],[20] $ 10,328 [14],[15],[16],[22]        
Investment, Identifier [Axis]: Ardonagh Midco 3 PLC, Insurance Brokers, First Lien Term Loan 4            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [7],[10],[11],[20] 5.75% [14],[15],[16],[19],[22] 7.00% [7],[10],[11],[20] 7.00% [7],[10],[11],[20] 5.75% [14],[15],[16],[19],[22] 5.75% [14],[15],[16],[19],[22]
Investment, interest rate [7],[8],[10],[11],[20] 12.46%   12.46% 12.46%    
Investment owned, balance, principal amount | £       £ 23,675 [7],[10],[11],[13],[20]   £ 0 [14],[15],[16],[18],[19],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19],[22] $ 0          
Fair Value, Ending Balance $ 29,185 [7],[10],[11],[20] $ 0 [14],[15],[16],[19],[22]        
Investment, Identifier [Axis]: Ardonagh Midco 3 PLC, Insurance Brokers, First Lien Term Loan 5            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 5.75%   5.75% 5.75%    
Investment, interest rate [7],[8],[10],[11],[20] 9.70%   9.70% 9.70%    
Investment owned, balance, principal amount | £ [7],[10],[11],[13],[20]       £ 3,649    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] $ 3,914          
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 1,783,332   1,783,332 1,783,332    
Net Realized Gain (Loss) $ 0          
Amount of Interest, Fees or Dividends Credited in Income 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 370          
Gross Additions 40          
Gross Reductions (321)          
Fair Value, Ending Balance $ 89 370        
Investment owned, percent of net assets 0.00%   0.00% 0.00%    
Investment, Identifier [Axis]: Assembled Brands Capital LLC, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.75%   6.75% 6.75%    
Investment, interest rate 12.14%   12.14% 12.14%    
Investment owned, balance, principal amount $ 21,852          
Net Realized Gain (Loss) 0          
Amount of Interest, Fees or Dividends Credited in Income 2,640          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 24,225          
Gross Additions 2,467          
Gross Reductions (4,869)          
Fair Value, Ending Balance $ 21,823 24,225        
Investment owned, percent of net assets 1.40%   1.40% 1.40%    
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Preferred Equity            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 1,129,453   1,129,453 1,129,453    
Net Realized Gain (Loss) $ 0          
Amount of Interest, Fees or Dividends Credited in Income 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 1,223          
Gross Additions 139          
Gross Reductions (357)          
Fair Value, Ending Balance $ 1,005 $ 1,223        
Investment owned, percent of net assets 0.10%   0.10% 0.10%    
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Specialized Finance, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 1,783,332 [6],[7] 1,609,201 [5],[14] 1,783,332 [6],[7] 1,783,332 [6],[7] 1,609,201 [5],[14] 1,609,201 [5],[14]
Net Realized Gain (Loss)   $ 0        
Amount of Interest, Fees or Dividends Credited in Income   0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance $ 370 [5],[14] 587        
Gross Additions   0        
Gross Reductions   (217)        
Fair Value, Ending Balance $ 89 [6],[7] $ 370 [5],[14]        
Investment owned, percent of net assets   0.00%     0.00% 0.00%
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Specialized Finance, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.75% [6],[7],[9],[11] 6.75% [5],[14],[16],[19] 6.75% [6],[7],[9],[11] 6.75% [6],[7],[9],[11] 6.75% [5],[14],[16],[19] 6.75% [5],[14],[16],[19]
Investment, interest rate 12.14% [6],[7],[8],[9],[11] 10.42% [5],[14],[16],[17],[19] 12.14% [6],[7],[8],[9],[11] 12.14% [6],[7],[8],[9],[11] 10.42% [5],[14],[16],[17],[19] 10.42% [5],[14],[16],[17],[19]
Investment owned, balance, principal amount $ 21,852 [6],[7],[9],[11],[13] $ 24,490 [5],[14],[16],[18],[19]        
Net Realized Gain (Loss)   0        
Amount of Interest, Fees or Dividends Credited in Income   1,764        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 24,225 [5],[14],[16],[19] 15,712        
Gross Additions   14,996        
Gross Reductions   (6,483)        
Fair Value, Ending Balance $ 21,823 [6],[7],[9],[11] $ 24,225 [5],[14],[16],[19]        
Investment owned, percent of net assets   1.90%     1.90% 1.90%
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Specialized Finance, Preferred Equity            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 1,129,453 [6],[7] 1,019,169 [5],[14] 1,129,453 [6],[7] 1,129,453 [6],[7] 1,019,169 [5],[14] 1,019,169 [5],[14]
Net Realized Gain (Loss)   $ 0        
Amount of Interest, Fees or Dividends Credited in Income   0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance $ 1,223 [5],[14] 1,152        
Gross Additions   71        
Gross Reductions   0        
Fair Value, Ending Balance $ 1,005 [6],[7] $ 1,223 [5],[14]        
Investment owned, percent of net assets   0.10%     0.10% 0.10%
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Specialized Finance, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 78,045 [6],[7] 70,425 [5],[14] 78,045 [6],[7] 78,045 [6],[7] 70,425 [5],[14] 70,425 [5],[14]
Net Realized Gain (Loss)   $ 0        
Amount of Interest, Fees or Dividends Credited in Income   0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance $ 0 [5],[14] 0        
Gross Additions   0        
Gross Reductions   0        
Fair Value, Ending Balance $ 0 [6],[7] $ 0 [5],[14]        
Investment owned, percent of net assets   0.00%     0.00% 0.00%
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 78,045   78,045 78,045    
Net Realized Gain (Loss) $ 0          
Amount of Interest, Fees or Dividends Credited in Income 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 0          
Gross Additions 0          
Gross Reductions 0          
Fair Value, Ending Balance $ 0 $ 0        
Investment owned, percent of net assets 0.00%   0.00% 0.00%    
Investment, Identifier [Axis]: Associated Asphalt Partners, LLC, Construction Materials, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   5.25%     5.25% 5.25%
Investment, interest rate [15],[16],[17]   8.06%     8.06% 8.06%
Investment owned, balance, principal amount [15],[16],[18]   $ 2,501        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 1,934          
Fair Value, Ending Balance [15],[16]   $ 1,934        
Investment, Identifier [Axis]: Astra Acquisition Corp., Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.25% [10],[11] 5.25% [15],[16] 5.25% [10],[11] 5.25% [10],[11] 5.25% [15],[16] 5.25% [15],[16]
Investment, interest rate 10.90% [8],[10],[11] 8.37% [15],[16],[17] 10.90% [8],[10],[11] 10.90% [8],[10],[11] 8.37% [15],[16],[17] 8.37% [15],[16],[17]
Investment owned, balance, principal amount $ 8,490 [10],[11],[13] $ 5,640 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 4,822          
Fair Value, Ending Balance 6,414 [10],[11] $ 4,822 [15],[16]        
Investment, Identifier [Axis]: Athenex, Inc., Pharmaceuticals, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, interest rate [14],[15],[16],[17],[22]   11.00%     11.00% 11.00%
Investment owned, balance, principal amount [14],[15],[18],[22]   $ 13,346        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] 12,812          
Fair Value, Ending Balance [14],[15],[22]   12,812        
Investment, Identifier [Axis]: Athenex, Inc., Pharmaceuticals, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment owned, balance, principal amount [14],[15],[18],[22],[26]   8,309        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22],[26] 8,309          
Fair Value, Ending Balance [14],[15],[22],[26]   $ 8,309        
Investment, Identifier [Axis]: Athenex, Inc., Pharmaceuticals, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15],[22]   328,149     328,149 328,149
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 16          
Fair Value, Ending Balance [14],[15],[22]   $ 16        
Investment, Identifier [Axis]: Aurora Lux Finco S.À.R.L., Airport Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.00% [7],[10],[11],[20] 6.00% [14],[15],[16],[22] 6.00% [7],[10],[11],[20] 6.00% [7],[10],[11],[20] 6.00% [14],[15],[16],[22] 6.00% [14],[15],[16],[22]
Investment, interest rate 11.49% [7],[8],[10],[11],[20] 8.78% [14],[15],[16],[17],[22] 11.49% [7],[8],[10],[11],[20] 11.49% [7],[8],[10],[11],[20] 8.78% [14],[15],[16],[17],[22] 8.78% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount $ 29,509 [7],[10],[11],[13],[20] $ 22,425 [14],[15],[16],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] 21,326          
Fair Value, Ending Balance $ 28,284 [7],[10],[11],[20] $ 21,326 [14],[15],[16],[22]        
Investment, Identifier [Axis]: Avalara, Inc., Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 7.25%   7.25% 7.25%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ (78)          
Investment, Identifier [Axis]: Avalara, Inc., Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.25%   7.25% 7.25%    
Investment, interest rate [7],[8],[10],[11] 12.64%   12.64% 12.64%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 50,470          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 49,688          
Investment, Identifier [Axis]: BAART Programs, Inc., Health Care Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   5.00%     5.00% 5.00%
Investment, interest rate [14],[15],[16],[17],[19]   8.12%     8.12% 8.12%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 2,546        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] $ 2,395          
Fair Value, Ending Balance [14],[15],[16],[19]   $ 2,395        
Investment, Identifier [Axis]: BAART Programs, Inc., Health Care Services, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 5.00%   5.00% 5.00%    
Investment, interest rate [7],[8],[10],[11] 10.65%   10.65% 10.65%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 3,247          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 3,169          
Investment, Identifier [Axis]: BAART Programs, Inc., Health Care Services, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 5.00%   5.00% 5.00%    
Investment, interest rate [7],[8],[10],[11] 10.65%   10.65% 10.65%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 1,261          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 1,231          
Investment, Identifier [Axis]: BAART Programs, Inc., Health Care Services, Second Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.50% [7],[10],[11] 8.50% [14],[15],[16] 8.50% [7],[10],[11] 8.50% [7],[10],[11] 8.50% [14],[15],[16] 8.50% [14],[15],[16]
Investment, interest rate 14.15% [7],[8],[10],[11] 11.62% [14],[15],[16],[17] 14.15% [7],[8],[10],[11] 14.15% [7],[8],[10],[11] 11.62% [14],[15],[16],[17] 11.62% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 8,920 [7],[10],[11],[13] $ 7,166 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 6,915          
Fair Value, Ending Balance $ 8,492 [7],[10],[11] $ 6,915 [14],[15],[16]        
Investment, Identifier [Axis]: BAART Programs, Inc., Health Care Services, Second Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.50% [7],[10],[11] 8.50% [14],[15],[16],[19] 8.50% [7],[10],[11] 8.50% [7],[10],[11] 8.50% [14],[15],[16],[19] 8.50% [14],[15],[16],[19]
Investment, interest rate 14.15% [7],[8],[10],[11] 11.62% [14],[15],[16],[17],[19] 14.15% [7],[8],[10],[11] 14.15% [7],[8],[10],[11] 11.62% [14],[15],[16],[17],[19] 11.62% [14],[15],[16],[17],[19]
Investment owned, balance, principal amount $ 2,091 [7],[10],[11],[13] $ 4,227 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 3,839          
Fair Value, Ending Balance $ 1,991 [7],[10],[11] $ 3,839 [14],[15],[16],[19]        
Investment, Identifier [Axis]: BAART Programs, Inc., Health Care Services, Second Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 8.50%   8.50% 8.50%    
Investment, interest rate [7],[8],[10],[11] 14.15%   14.15% 14.15%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 4,361          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 4,152          
Investment, Identifier [Axis]: Berner Food & Beverage, LLC, Soft Drinks & Non-alcoholic Beverages, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 4.50%   4.50% 4.50%    
Investment, interest rate [7],[8],[9],[10],[11] 13.00%   13.00% 13.00%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 2,221          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ 2,178          
Investment, Identifier [Axis]: Berner Food & Beverage, LLC, Soft Drinks & Non-alcoholic Beverages, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 5.50%   5.50% 5.50%    
Investment, interest rate [7],[8],[10],[11] 11.02%   11.02% 11.02%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 40,660          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 40,213          
Investment, Identifier [Axis]: Berner Food & Beverage, LLC, Soft Drinks, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   4.50%     4.50% 4.50%
Investment, interest rate [14],[15],[16],[17],[19]   10.75%     10.75% 10.75%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 1,702        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 1,617          
Fair Value, Ending Balance [14],[15],[16],[19]   $ 1,617        
Investment, Identifier [Axis]: Berner Food & Beverage, LLC, Soft Drinks, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   5.50%     5.50% 5.50%
Investment, interest rate [14],[15],[16],[17]   8.31%     8.31% 8.31%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 33,078        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 32,053          
Fair Value, Ending Balance [14],[15],[16]   32,053        
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment owned, balance, principal amount [14],[15],[18],[19],[22],[26]   0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[19],[22],[26] $ 0          
Fair Value, Ending Balance [14],[15],[19],[22],[26]   $ 0        
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, interest rate 8.00% [7],[8],[10],[11],[20] 10.25% [14],[15],[16],[17],[22] 8.00% [7],[8],[10],[11],[20] 8.00% [7],[8],[10],[11],[20] 10.25% [14],[15],[16],[17],[22] 10.25% [14],[15],[16],[17],[22]
Investment, interest rate, paid in kind [7],[10],[20] 2.25%   2.25% 2.25%    
Investment owned, balance, principal amount $ 6,757 [7],[10],[13],[20] $ 5,322 [14],[15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] 5,114          
Fair Value, Ending Balance 6,225 [7],[10],[20] $ 5,114 [14],[15],[22]        
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, interest rate [14],[15],[16],[17],[19],[22]   10.25%     10.25% 10.25%
Investment owned, balance, principal amount 3,316 [7],[10],[13],[20],[21] $ 0 [14],[15],[18],[19],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[19],[22] 0          
Fair Value, Ending Balance $ 3,169 [7],[10],[20],[21] 0 [14],[15],[19],[22]        
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[10],[11],[20] 8.00%   8.00% 8.00%    
Investment, interest rate, paid in kind [7],[10],[20] 2.25%   2.25% 2.25%    
Investment owned, balance, principal amount $ 0 [7],[9],[10],[13],[20] 2,353 [14],[15],[18],[22],[26]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22],[26] 2,353          
Fair Value, Ending Balance $ 0 [7],[9],[10],[20] $ 2,353 [14],[15],[22],[26]        
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 4            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[10],[11],[20] 8.00%   8.00% 8.00%    
Investment, interest rate, paid in kind [7],[10],[20] 2.25%   2.25% 2.25%    
Investment owned, balance, principal amount [7],[9],[10],[13],[20] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[20] 0          
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 5            
Schedule of Investments [Line Items]            
Investment owned, balance, principal amount [7],[9],[10],[13],[20],[21] 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[20],[21] 0          
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 6            
Schedule of Investments [Line Items]            
Investment owned, balance, principal amount [7],[9],[10],[13],[20],[21] 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[20],[21] $ 0          
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 26,131 [7],[10],[20] 21,177 [14],[15],[22] 26,131 [7],[10],[20] 26,131 [7],[10],[20] 21,177 [14],[15],[22] 21,177 [14],[15],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 98          
Fair Value, Ending Balance $ 3 [7],[10],[20] $ 98 [14],[15],[22]        
Investment, Identifier [Axis]: Blackhawk Network Holdings, Inc., Data Processing & Outsourced Services, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [10],[11] 7.00% [15],[16] 7.00% [10],[11] 7.00% [10],[11] 7.00% [15],[16] 7.00% [15],[16]
Investment, interest rate 12.43% [8],[10],[11] 9.50% [15],[16],[17] 12.43% [8],[10],[11] 12.43% [8],[10],[11] 9.50% [15],[16],[17] 9.50% [15],[16],[17]
Investment owned, balance, principal amount $ 30,625 [10],[11],[13] $ 30,625 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 29,017          
Fair Value, Ending Balance $ 29,989 [10],[11] $ 29,017 [15],[16]        
Investment, Identifier [Axis]: Blumenthal Temecula, LLC, Automotive Retail, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 394,297 [7],[10] 298,460 [14],[15] 394,297 [7],[10] 394,297 [7],[10] 298,460 [14],[15] 298,460 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 349          
Fair Value, Ending Balance $ 158 [7],[10] $ 349 [14],[15]        
Investment, Identifier [Axis]: Blumenthal Temecula, LLC, Automotive Retail, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate 9.00% [7],[8],[10],[11] 9.00% [14],[15],[16],[17] 9.00% [7],[8],[10],[11] 9.00% [7],[8],[10],[11] 9.00% [14],[15],[16],[17] 9.00% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 5,257 [7],[10],[13] $ 3,979 [14],[15],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] 3,960          
Fair Value, Ending Balance $ 5,251 [7],[10] $ 3,960 [14],[15]        
Investment, Identifier [Axis]: Blumenthal Temecula, LLC, Automotive Retail, Preferred Equity 1            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 1,708,618 [7],[10] 1,293,324 [14],[15] 1,708,618 [7],[10] 1,708,618 [7],[10] 1,293,324 [14],[15] 1,293,324 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 1,280          
Fair Value, Ending Balance $ 1,999 [7],[10] $ 1,280 [14],[15]        
Investment, Identifier [Axis]: Blumenthal Temecula, LLC, Automotive Retail, Preferred Equity 2            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 394,297 [7],[10] 298,460 [14],[15] 394,297 [7],[10] 394,297 [7],[10] 298,460 [14],[15] 298,460 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 295          
Fair Value, Ending Balance $ 442 [7],[10] $ 295 [14],[15]        
Investment, Identifier [Axis]: C5 Technology Holdings, LLC, Data Processing & Outsourced Services, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 829 [7] 829 [1],[2],[14] 829 [7] 829 [7] 829 [1],[2],[14] 829 [1],[2],[14]
Investment owned, balance, principal amount   $ 0        
Net Realized Gain (Loss) $ 0 0        
Amount of Interest, Fees or Dividends Credited in Income 0 0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 0 [1],[2],[14] 0        
Gross Additions 0 0        
Gross Reductions 0 0        
Fair Value, Ending Balance $ 0 [7] $ 0 [1],[2],[14]        
Investment owned, percent of net assets 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Investment, Identifier [Axis]: C5 Technology Holdings, LLC, Data Processing & Outsourced Services, Preferred Equity            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 34,984,460 [7] 34,984,460 [1],[2],[14] 34,984,460 [7] 34,984,460 [7] 34,984,460 [1],[2],[14] 34,984,460 [1],[2],[14]
Investment owned, balance, principal amount   $ 0        
Net Realized Gain (Loss) $ 0 0        
Amount of Interest, Fees or Dividends Credited in Income 0 0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 27,638 [1],[2],[14] 27,638        
Gross Additions 0 0        
Gross Reductions 0 0        
Fair Value, Ending Balance $ 27,638 [7] $ 27,638 [1],[2],[14]        
Investment owned, percent of net assets 1.80% 2.20% 1.80% 1.80% 2.20% 2.20%
Investment, Identifier [Axis]: CCO Holdings LLC, Cable & Satellite, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17],[22]   4.50%     4.50% 4.50%
Investment owned, balance, principal amount [15],[18],[22]   $ 2,097        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] $ 1,603          
Fair Value, Ending Balance [15],[22]   $ 1,603        
Investment, Identifier [Axis]: CITGO Holding, Inc., Oil & Gas Refining & Marketing, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17]   9.25%     9.25% 9.25%
Investment owned, balance, principal amount [15],[18]   $ 7,857        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15] 7,807          
Fair Value, Ending Balance [15]   $ 7,807        
Investment, Identifier [Axis]: CITGO Petroleum Corp., Oil & Gas Refining & Marketing, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   6.25%     6.25% 6.25%
Investment, interest rate [15],[16],[17]   9.37%     9.37% 9.37%
Investment owned, balance, principal amount [15],[16],[18]   $ 795        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 797          
Fair Value, Ending Balance [15],[16]   $ 797        
Investment, Identifier [Axis]: CPC Acquisition Corp., Specialty Chemicals, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[23] 7.75%   7.75% 7.75%    
Investment owned, balance, principal amount [7],[10],[11],[13],[23] $ 727          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[23] 396          
Investment, Identifier [Axis]: Cadence Aerospace, LLC, Aerospace & Defense, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   6.50%     6.50% 6.50%
Investment, interest rate [14],[15],[16],[17]   9.31%     9.31% 9.31%
Investment, interest rate, paid in kind [14],[15],[16]   2.00%     2.00% 2.00%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 14,294        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 13,143          
Fair Value, Ending Balance [14],[15],[16]   $ 13,143        
Investment, Identifier [Axis]: Cadence Aerospace, LLC, Aerospace & Defense, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11] 12.07%   12.07% 12.07%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 37          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 37          
Investment, Identifier [Axis]: Cadence Aerospace, LLC, Aerospace & Defense, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11] 12.07%   12.07% 12.07%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 3,031          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 3,031          
Investment, Identifier [Axis]: Cadence Aerospace, LLC, Aerospace & Defense, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11] 12.07%   12.07% 12.07%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 1,557          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 1,557          
Investment, Identifier [Axis]: Cadence Aerospace, LLC, Aerospace & Defense, First Lien Term Loan 4            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11] 12.07%   12.07% 12.07%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 1,024          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 1,024          
Investment, Identifier [Axis]: Caregiver Services, Inc., Health Care Services, Preferred Equity            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 1,080,399 [6],[7] 1,080,399 [5],[14] 1,080,399 [6],[7] 1,080,399 [6],[7] 1,080,399 [5],[14] 1,080,399 [5],[14]
Net Realized Gain (Loss)   $ 0        
Amount of Interest, Fees or Dividends Credited in Income   0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance $ 378 [5],[14] 838        
Gross Additions   0        
Gross Reductions   (460)        
Fair Value, Ending Balance $ 432 [6],[7] $ 378 [5],[14]        
Investment owned, percent of net assets   0.00%     0.00% 0.00%
Investment, Identifier [Axis]: Caregiver Services, Inc., Preferred Equity            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 1,080,399   1,080,399 1,080,399    
Net Realized Gain (Loss) $ 0          
Amount of Interest, Fees or Dividends Credited in Income 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 378          
Gross Additions 54          
Gross Reductions 0          
Fair Value, Ending Balance $ 432 $ 378        
Investment owned, percent of net assets 0.00%   0.00% 0.00%    
Investment, Identifier [Axis]: Carvana Co., Automotive Retail, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17],[22]   5.63%     5.63% 5.63%
Investment owned, balance, principal amount [15],[18],[22]   $ 6,700        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] $ 4,724          
Fair Value, Ending Balance [15],[22]   $ 4,724        
Investment, Identifier [Axis]: CircusTrix Holdings, LLC, Leisure Facilities, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   5.50%     5.50% 5.50%
Investment, interest rate [14],[15],[16],[17]   8.62%     8.62% 8.62%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 10,692        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 10,209          
Fair Value, Ending Balance [14],[15],[16]   $ 10,209        
Investment, Identifier [Axis]: Clear Channel Outdoor Holdings, Inc., Advertising, Fixed Rate Bond 1            
Schedule of Investments [Line Items]            
Investment, interest rate 7.50% [8],[10],[11],[20] 7.50% [15],[16],[17],[22] 7.50% [8],[10],[11],[20] 7.50% [8],[10],[11],[20] 7.50% [15],[16],[17],[22] 7.50% [15],[16],[17],[22]
Investment owned, balance, principal amount $ 2,632 [10],[13],[20] $ 4,311 [15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] 3,132          
Fair Value, Ending Balance $ 2,017 [10],[20] $ 3,132 [15],[22]        
Investment, Identifier [Axis]: Clear Channel Outdoor Holdings, Inc., Advertising, Fixed Rate Bond 2            
Schedule of Investments [Line Items]            
Investment, interest rate 7.75% [8],[10],[11],[20] 5.13% [15],[16],[17],[22] 7.75% [8],[10],[11],[20] 7.75% [8],[10],[11],[20] 5.13% [15],[16],[17],[22] 5.13% [15],[16],[17],[22]
Investment owned, balance, principal amount $ 176 [10],[13],[20] $ 1,374 [15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] 1,163          
Fair Value, Ending Balance 141 [10],[20] $ 1,163 [15],[22]        
Investment, Identifier [Axis]: Clear Channel Outdoor Holdings, Inc., Advertising, Fixed Rate Bond 3            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17],[22]   7.75%     7.75% 7.75%
Investment owned, balance, principal amount [15],[18],[22]   $ 676        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] $ 512          
Fair Value, Ending Balance [15],[22]   $ 512        
Investment, Identifier [Axis]: Condor Merger Sub Inc., Systems Software, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate 7.38% [8],[10],[11] 7.38% [15],[16],[17] 7.38% [8],[10],[11] 7.38% [8],[10],[11] 7.38% [15],[16],[17] 7.38% [15],[16],[17]
Investment owned, balance, principal amount $ 8,420 [10],[13] $ 8,420 [15],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15] 6,900          
Fair Value, Ending Balance $ 7,059 [10] $ 6,900 [15]        
Investment, Identifier [Axis]: Continental Intermodal Group LP, Oil & Gas Storage & Transportation, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.50% [7],[10],[11],[23] 8.50% [14],[15],[16] 8.50% [7],[10],[11],[23] 8.50% [7],[10],[11],[23] 8.50% [14],[15],[16] 8.50% [14],[15],[16]
Investment, interest rate [14],[15],[16],[17]   11.62%     11.62% 11.62%
Investment owned, balance, principal amount $ 22,084 [7],[10],[11],[13],[23] $ 22,537 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 20,396          
Fair Value, Ending Balance 16,040 [7],[10],[11],[23] 20,396 [14],[15],[16]        
Investment, Identifier [Axis]: Continental Intermodal Group LP, Oil & Gas Storage & Transportation, Warrants            
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] 457          
Fair Value, Ending Balance 0 [7],[10] $ 457 [14],[15]        
Investment, Identifier [Axis]: Convergeone Holdings, Inc., IT Consulting & Other Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   5.00%     5.00% 5.00%
Investment, interest rate [15],[16],[17]   8.12%     8.12% 8.12%
Investment owned, balance, principal amount [15],[16],[18]   $ 11,913        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 8,596          
Fair Value, Ending Balance [15],[16]   $ 8,596        
Investment, Identifier [Axis]: Conviva Inc., Application Software, Preferred Equity            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 417,851 [7],[10] 417,851 [14],[15] 417,851 [7],[10] 417,851 [7],[10] 417,851 [14],[15] 417,851 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 894          
Fair Value, Ending Balance 894 [7],[10] $ 894 [14],[15]        
Investment, Identifier [Axis]: CorEvitas, LLC, Health Care Technology, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15]   1,099     1,099 1,099
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] 2,340          
Fair Value, Ending Balance [14],[15]   $ 2,340        
Investment, Identifier [Axis]: CorEvitas, LLC, Health Care Technology, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   4.75%     4.75% 4.75%
Investment, interest rate [14],[15],[16],[17],[19]   11.00%     11.00% 11.00%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 916        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 898          
Fair Value, Ending Balance [14],[15],[16],[19]   $ 898        
Investment, Identifier [Axis]: CorEvitas, LLC, Health Care Technology, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   5.75%     5.75% 5.75%
Investment, interest rate [14],[15],[16],[17]   8.88%     8.88% 8.88%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 13,712        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 13,583          
Fair Value, Ending Balance [14],[15],[16]   $ 13,583        
Investment, Identifier [Axis]: Coupa Holdings, LLC, Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 7.50%   7.50% 7.50%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ (20)          
Investment, Identifier [Axis]: Coupa Holdings, LLC, Application Software, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.50%   7.50% 7.50%    
Investment, interest rate [7],[8],[10],[11] 12.82%   12.82% 12.82%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 13,157          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 12,858          
Investment, Identifier [Axis]: Coupa Holdings, LLC, Application Software, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 7.50%   7.50% 7.50%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ (13)          
Investment, Identifier [Axis]: Covetrus, Inc., Health Care Distributors, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.00% [10],[11] 5.00% [15],[16] 5.00% [10],[11] 5.00% [10],[11] 5.00% [15],[16] 5.00% [15],[16]
Investment, interest rate 10.39% [8],[10],[11] 7.65% [15],[16],[17] 10.39% [8],[10],[11] 10.39% [8],[10],[11] 7.65% [15],[16],[17] 7.65% [15],[16],[17]
Investment owned, balance, principal amount $ 14,750 [10],[11],[13] $ 10,336 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 9,681          
Fair Value, Ending Balance $ 14,616 [10],[11] $ 9,681 [15],[16]        
Investment, Identifier [Axis]: Coyote Buyer, LLC, Specialty Chemicals, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.00% [7],[9],[10],[11] 6.00% [14],[15],[16],[19] 6.00% [7],[9],[10],[11] 6.00% [7],[9],[10],[11] 6.00% [14],[15],[16],[19] 6.00% [14],[15],[16],[19]
Investment, interest rate [8],[11] 11.47%   11.47% 11.47%    
Investment owned, balance, principal amount $ 933 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (26)          
Fair Value, Ending Balance $ 918 [7],[9],[10],[11] $ (26) [14],[15],[16],[19]        
Investment, Identifier [Axis]: Coyote Buyer, LLC, Specialty Chemicals, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.00% [7],[10],[11] 6.00% [14],[15],[16] 6.00% [7],[10],[11] 6.00% [7],[10],[11] 6.00% [14],[15],[16] 6.00% [14],[15],[16]
Investment, interest rate 11.52% [7],[8],[10],[11] 8.81% [14],[15],[16],[17] 11.52% [7],[8],[10],[11] 11.52% [7],[8],[10],[11] 8.81% [14],[15],[16],[17] 8.81% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 18,013 [7],[10],[11],[13] $ 18,200 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 17,843          
Fair Value, Ending Balance $ 17,812 [7],[10],[11] $ 17,843 [14],[15],[16]        
Investment, Identifier [Axis]: DTI Holdco, Inc., Research & Consulting Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 4.75% [10],[11] 4.75% [15],[16] 4.75% [10],[11] 4.75% [10],[11] 4.75% [15],[16] 4.75% [15],[16]
Investment, interest rate 10.12% [8],[10],[11] 7.33% [15],[16],[17] 10.12% [8],[10],[11] 10.12% [8],[10],[11] 7.33% [15],[16],[17] 7.33% [15],[16],[17]
Investment owned, balance, principal amount $ 4,950 [10],[11],[13] $ 5,000 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 4,760          
Fair Value, Ending Balance 4,831 [10],[11] $ 4,760 [15],[16]        
Investment, Identifier [Axis]: Delivery Hero FinCo LLC, Internet & Direct Marketing Retail, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16],[22]   5.75%     5.75% 5.75%
Investment, interest rate [15],[16],[17],[22]   8.49%     8.49% 8.49%
Investment owned, balance, principal amount [15],[16],[18],[22]   $ 4,988        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16],[22] $ 4,757          
Fair Value, Ending Balance [15],[16],[22]   $ 4,757        
Investment, Identifier [Axis]: Delta Leasing SPV II LLC, Specialized Finance, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 2 [7],[10],[20] 2 [14],[15],[22] 2 [7],[10],[20] 2 [7],[10],[20] 2 [14],[15],[22] 2 [14],[15],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 2          
Fair Value, Ending Balance $ 2 [7],[10],[20] $ 2 [14],[15],[22]        
Investment, Identifier [Axis]: Delta Leasing SPV II LLC, Specialized Finance, Preferred Equity            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 419 [7],[10],[20] 419 [14],[15],[22] 419 [7],[10],[20] 419 [7],[10],[20] 419 [14],[15],[22] 419 [14],[15],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 419          
Fair Value, Ending Balance $ 419 [7],[10],[20] $ 419 [14],[15],[22]        
Investment, Identifier [Axis]: Delta Leasing SPV II LLC, Specialized Finance, Subordinated Debt Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate 3.00% [7],[8],[9],[10],[11],[20] 10.00% [14],[15],[16],[17],[19],[22] 3.00% [7],[8],[9],[10],[11],[20] 3.00% [7],[8],[9],[10],[11],[20] 10.00% [14],[15],[16],[17],[19],[22] 10.00% [14],[15],[16],[17],[19],[22]
Investment, interest rate, paid in kind [7],[9],[10],[20] 7.00%   7.00% 7.00%    
Investment owned, balance, principal amount $ 17,465 [7],[9],[10],[13],[20] $ 4,183 [14],[15],[18],[19],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[19],[22] 4,183          
Fair Value, Ending Balance $ 17,465 [7],[9],[10],[20] $ 4,183 [14],[15],[19],[22]        
Investment, Identifier [Axis]: Delta Leasing SPV II LLC, Specialized Finance, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 31 [7],[10],[20] 31 [14],[15],[22] 31 [7],[10],[20] 31 [7],[10],[20] 31 [14],[15],[22] 31 [14],[15],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 0          
Fair Value, Ending Balance 0 [7],[10],[20] $ 0 [14],[15],[22]        
Investment, Identifier [Axis]: Delta Topco, Inc., Systems Software, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   7.25%     7.25% 7.25%
Investment, interest rate [15],[16],[17]   9.34%     9.34% 9.34%
Investment owned, balance, principal amount [15],[16],[18]   $ 6,680        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 5,934          
Fair Value, Ending Balance [15],[16]   $ 5,934        
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 9.00%   9.00% 9.00%    
Investment, interest rate [7],[8],[10],[11] 14.54%   14.54% 14.54%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 20,757          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 20,653          
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   9.00%     9.00% 9.00%
Investment, interest rate [14],[15],[16],[17]   12.67%     12.67% 12.67%
Investment, interest rate, paid in kind [14],[15],[16]   2.00%     2.00% 2.00%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 24,396        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 22,993          
Fair Value, Ending Balance [14],[15],[16]   $ 22,993        
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   9.00%     9.00% 9.00%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] $ (129)          
Fair Value, Ending Balance [14],[15],[16],[19]   $ (129)        
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, Subordinated Debt Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate, paid in kind [7],[10] 8.00%   8.00% 8.00%    
Investment owned, balance, principal amount [7],[10],[13] $ 654          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10] $ 631          
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 6,397,254 [7],[10] 5,403,823 [14],[15] 6,397,254 [7],[10] 6,397,254 [7],[10] 5,403,823 [14],[15] 5,403,823 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 1,297          
Fair Value, Ending Balance $ 1,152 [7],[10] $ 1,297 [14],[15]        
Investment, Identifier [Axis]: Digital.AI Software Holdings, Inc., Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [7],[9],[10],[11] 6.50% [14],[15],[16],[19] 7.00% [7],[9],[10],[11] 7.00% [7],[9],[10],[11] 6.50% [14],[15],[16],[19] 6.50% [14],[15],[16],[19]
Investment, interest rate 12.49% [7],[8],[9],[10],[11] 9.41% [14],[15],[16],[17],[19] 12.49% [7],[8],[9],[10],[11] 12.49% [7],[8],[9],[10],[11] 9.41% [14],[15],[16],[17],[19] 9.41% [14],[15],[16],[17],[19]
Investment owned, balance, principal amount $ 284 [7],[9],[10],[11],[13] $ 251 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 239          
Fair Value, Ending Balance $ 252 [7],[9],[10],[11] $ 239 [14],[15],[16],[19]        
Investment, Identifier [Axis]: Digital.AI Software Holdings, Inc., Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [7],[10],[11] 7.00% [14],[15],[16] 7.00% [7],[10],[11] 7.00% [7],[10],[11] 7.00% [14],[15],[16] 7.00% [14],[15],[16]
Investment, interest rate 12.49% [7],[8],[10],[11] 9.91% [14],[15],[16],[17] 12.49% [7],[8],[10],[11] 12.49% [7],[8],[10],[11] 9.91% [14],[15],[16],[17] 9.91% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 12,386 [7],[10],[11],[13] $ 9,902 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 9,793          
Fair Value, Ending Balance $ 12,101 [7],[10],[11] $ 9,793 [14],[15],[16]        
Investment, Identifier [Axis]: DirecTV Financing, LLC, Cable & Satellite, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.00% [10],[11] 5.00% [15],[16] 5.00% [10],[11] 5.00% [10],[11] 5.00% [15],[16] 5.00% [15],[16]
Investment, interest rate 10.43% [8],[10],[11] 8.12% [15],[16],[17] 10.43% [8],[10],[11] 10.43% [8],[10],[11] 8.12% [15],[16],[17] 8.12% [15],[16],[17]
Investment owned, balance, principal amount $ 4,641 [10],[11],[13] $ 19,242 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 17,973          
Fair Value, Ending Balance $ 4,546 [10],[11] $ 17,973 [15],[16]        
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 30,031 [7] 30,031 [1],[2],[14] 30,031 [7] 30,031 [7] 30,031 [1],[2],[14] 30,031 [1],[2],[14]
Net Realized Gain (Loss) $ 0 $ 0        
Amount of Interest, Fees or Dividends Credited in Income 0 3,308        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 4,946 [1],[2],[14] 18,065        
Gross Additions 0 0        
Gross Reductions (2,235) (13,119)        
Fair Value, Ending Balance $ 2,711 [7] $ 4,946 [1],[2],[14]        
Investment owned, percent of net assets 0.20% 0.40% 0.20% 0.20% 0.40% 0.40%
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.00% [7],[11] 5.00% [1],[2],[14],[16],[19] 5.00% [7],[11] 5.00% [7],[11] 5.00% [1],[2],[14],[16],[19] 5.00% [1],[2],[14],[16],[19]
Investment, interest rate 10.54% [7],[8],[11] 5.00% 10.54% [7],[8],[11] 10.54% [7],[8],[11] 5.00% 5.00%
Investment owned, balance, principal amount $ 5,574 [7],[11],[13] $ 0 [1],[2],[14],[16],[18],[19]        
Net Realized Gain (Loss) 0 0        
Amount of Interest, Fees or Dividends Credited in Income 266 57        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 0 [1],[2],[14],[16],[19] 0        
Gross Additions 5,574 0        
Gross Reductions 0 0        
Fair Value, Ending Balance $ 5,574 [7],[11] $ 0 [1],[2],[14],[16],[19]        
Investment owned, percent of net assets 0.40% 0.00% 0.40% 0.40% 0.00% 0.00%
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [1],[2],[14],[16]   5.00%     5.00% 5.00%
Investment, interest rate [1],[2],[14],[16],[17]   8.68%     8.68% 8.68%
Investment owned, balance, principal amount [1],[2],[14],[16],[18]   $ 14,333        
Net Realized Gain (Loss)   0        
Amount of Interest, Fees or Dividends Credited in Income   1,367        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance $ 14,333 [1],[2],[14],[16] 27,381        
Gross Additions   0        
Gross Reductions   (13,048)        
Fair Value, Ending Balance [1],[2],[14],[16]   $ 14,333        
Investment owned, percent of net assets   1.20%     1.20% 1.20%
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[11] 5.00%   5.00% 5.00%    
Investment, interest rate [7],[8],[11] 10.54%   10.54% 10.54%    
Investment owned, balance, principal amount [7],[11],[13] $ 14,068          
Net Realized Gain (Loss) 0          
Amount of Interest, Fees or Dividends Credited in Income 1,459          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 14,333          
Gross Additions 0          
Gross Reductions (265)          
Fair Value, Ending Balance $ 14,068 [7],[11] $ 14,333        
Investment owned, percent of net assets 0.90%   0.90% 0.90%    
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[11] 5.00%   5.00% 5.00%    
Investment, interest rate [7],[8],[9],[11] 10.42%   10.42% 10.42%    
Investment owned, balance, principal amount [7],[9],[11],[13] $ 2,090          
Net Realized Gain (Loss) 0          
Amount of Interest, Fees or Dividends Credited in Income 10          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 0          
Gross Additions 2,090          
Gross Reductions 0          
Fair Value, Ending Balance $ 2,090 [7],[9],[11] $ 0        
Investment owned, percent of net assets 0.10%   0.10% 0.10%    
Investment, Identifier [Axis]: EOS Fitness Opco Holdings, LLC, Leisure Facilities, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 12,500 [7],[10] 12,500 [14],[15] 12,500 [7],[10] 12,500 [7],[10] 12,500 [14],[15] 12,500 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 0          
Fair Value, Ending Balance $ 0 [7],[10] $ 0 [14],[15]        
Investment, Identifier [Axis]: EOS Fitness Opco Holdings, LLC, Leisure Facilities, Preferred Equity            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 488 [7],[10] 488 [14],[15] 488 [7],[10] 488 [7],[10] 488 [14],[15] 488 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 966          
Fair Value, Ending Balance $ 1,345 [7],[10] $ 966 [14],[15]        
Investment, Identifier [Axis]: Eagleview Technology Corporation, Application Software, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.50% [7],[10],[11] 7.50% [14],[15],[16] 7.50% [7],[10],[11] 7.50% [7],[10],[11] 7.50% [14],[15],[16] 7.50% [14],[15],[16]
Investment, interest rate 13.04% [7],[8],[10],[11] 11.17% [14],[15],[16],[17] 13.04% [7],[8],[10],[11] 13.04% [7],[8],[10],[11] 11.17% [14],[15],[16],[17] 11.17% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 8,974 [7],[10],[11],[13] $ 8,974 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 8,503          
Fair Value, Ending Balance $ 7,987 [7],[10],[11] $ 8,503 [14],[15],[16]        
Investment, Identifier [Axis]: Establishment Labs Holdings Inc., Health Care Technology, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, interest rate 3.00% [7],[8],[10],[11],[20] 3.00% [14],[15],[16],[17],[22] 3.00% [7],[8],[10],[11],[20] 3.00% [7],[8],[10],[11],[20] 3.00% [14],[15],[16],[17],[22] 3.00% [14],[15],[16],[17],[22]
Investment, interest rate, paid in kind 6.00% [7],[10],[20] 6.00% [14],[15],[22] 6.00% [7],[10],[20] 6.00% [7],[10],[20] 6.00% [14],[15],[22] 6.00% [14],[15],[22]
Investment owned, balance, principal amount $ 11,065 [7],[10],[13],[20] $ 10,418 [14],[15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] 10,231          
Fair Value, Ending Balance $ 10,677 [7],[10],[20] $ 10,231 [14],[15],[22]        
Investment, Identifier [Axis]: Establishment Labs Holdings Inc., Health Care Technology, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, interest rate 3.00% [7],[8],[10],[11],[20] 3.00% [14],[15],[16],[17],[19],[22] 3.00% [7],[8],[10],[11],[20] 3.00% [7],[8],[10],[11],[20] 3.00% [14],[15],[16],[17],[19],[22] 3.00% [14],[15],[16],[17],[19],[22]
Investment, interest rate, paid in kind [7],[10],[20] 6.00%   6.00% 6.00%    
Investment owned, balance, principal amount $ 1,772 [7],[10],[13],[20] $ 0 [14],[15],[18],[19],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[19],[22] 0          
Fair Value, Ending Balance $ 1,710 [7],[10],[20] $ 0 [14],[15],[19],[22]        
Investment, Identifier [Axis]: Establishment Labs Holdings Inc., Health Care Technology, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[9],[10],[11],[20] 3.00%   3.00% 3.00%    
Investment, interest rate, paid in kind [7],[9],[10],[20] 6.00%   6.00% 6.00%    
Investment owned, balance, principal amount [7],[9],[10],[13],[20] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[20] $ 0          
Investment, Identifier [Axis]: Establishment Labs Holdings Inc., Health Care Technology, First Lien Term Loan 4            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[9],[10],[11],[20] 3.00%   3.00% 3.00%    
Investment, interest rate, paid in kind [7],[9],[10],[20] 6.00%   6.00% 6.00%    
Investment owned, balance, principal amount [7],[9],[10],[13],[20] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[20] $ 0          
Investment, Identifier [Axis]: Evergreen IX Borrower 2023, LLC, Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.00%   6.00% 6.00%    
Investment, interest rate [7],[10],[11] 11.32%   11.32% 11.32%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 14,736          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 14,368          
Investment, Identifier [Axis]: Evergreen IX Borrower 2023, LLC, Application Software,First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 6.00%   6.00% 6.00%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ (41)          
Investment, Identifier [Axis]: FINThrive Software Intermediate Holdings, Inc., Health Care Technology, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.75% [10],[11] 6.75% [15],[16] 6.75% [10],[11] 6.75% [10],[11] 6.75% [15],[16] 6.75% [15],[16]
Investment, interest rate 12.18% [8],[10],[11] 9.87% [15],[16],[17] 12.18% [8],[10],[11] 12.18% [8],[10],[11] 9.87% [15],[16],[17] 9.87% [15],[16],[17]
Investment owned, balance, principal amount $ 31,074 [10],[11],[13] $ 25,061 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 21,646          
Fair Value, Ending Balance $ 19,917 [10],[11] $ 21,646 [15],[16]        
Investment, Identifier [Axis]: Fairbridge Strategic Capital Funding LLC, Real Estate Operating Companies, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate 9.00% [7],[8],[9],[10],[11] 9.00% [14],[15],[16],[17],[27] 9.00% [7],[8],[9],[10],[11] 9.00% [7],[8],[9],[10],[11] 9.00% [14],[15],[16],[17],[27] 9.00% [14],[15],[16],[17],[27]
Investment owned, balance, principal amount $ 59,950 [7],[9],[10],[13] $ 27,850 [14],[15],[18],[27]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[27] 27,850          
Fair Value, Ending Balance $ 59,950 [7],[9],[10] $ 27,850 [14],[15],[27]        
Investment, Identifier [Axis]: Fairbridge Strategic Capital Funding LLC, Real Estate Operating Companies, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 3,750 [7],[10],[20] 2,500 [14],[15],[22],[27] 3,750 [7],[10],[20] 3,750 [7],[10],[20] 2,500 [14],[15],[22],[27] 2,500 [14],[15],[22],[27]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22],[27] $ 3          
Fair Value, Ending Balance $ 3 [7],[10],[20] $ 3 [14],[15],[22],[27]        
Investment, Identifier [Axis]: Finastra USA, Inc.Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11],[20] 7.25%   7.25% 7.25%    
Investment, interest rate [7],[9],[10],[11],[20] 12.55%   12.55% 12.55%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13],[20] $ 258          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11],[20] $ 234          
Investment, Identifier [Axis]: Finastra USA, Inc.Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 7.25%   7.25% 7.25%    
Investment, interest rate [7],[10],[11],[20] 12.55%   12.55% 12.55%    
Investment owned, balance, principal amount [7],[10],[11],[13],[20] $ 11,742          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] 11,511          
Investment, Identifier [Axis]: First Star Speir Aviation Limited, Airlines, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate   9.00%     9.00% 9.00%
Net Realized Gain (Loss)   $ 7,500        
Amount of Interest, Fees or Dividends Credited in Income   0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 0 7,500        
Gross Additions   0        
Gross Reductions   (7,500)        
Fair Value, Ending Balance   $ 0        
Investment owned, percent of net assets   0.00%     0.00% 0.00%
Investment, Identifier [Axis]: First Star Speir Aviation Limited, Airlines, Membership Interest            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares   1     1 1
Net Realized Gain (Loss)   $ (5,632)        
Amount of Interest, Fees or Dividends Credited in Income   158        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance $ 0 698        
Gross Additions   0        
Gross Reductions   (698)        
Fair Value, Ending Balance   $ 0        
Investment owned, percent of net assets   0.00%     0.00% 0.00%
Investment, Identifier [Axis]: Fortress Biotech, Inc., Biotechnology, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate 11.00% [7],[8],[10],[11],[20] 11.00% [14],[15],[16],[17],[22] 11.00% [7],[8],[10],[11],[20] 11.00% [7],[8],[10],[11],[20] 11.00% [14],[15],[16],[17],[22] 11.00% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount $ 11,918 [7],[10],[13],[20] $ 9,466 [14],[15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] 9,008          
Fair Value, Ending Balance $ 11,144 [7],[10],[20] $ 9,008 [14],[15],[22]        
Investment, Identifier [Axis]: Fortress Biotech, Inc., Biotechnology, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 417,011 [7],[10],[20] 331,200 [14],[15],[22] 417,011 [7],[10],[20] 417,011 [7],[10],[20] 331,200 [14],[15],[22] 331,200 [14],[15],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 66          
Fair Value, Ending Balance $ 42 [7],[10],[20] $ 66 [14],[15],[22]        
Investment, Identifier [Axis]: Frontier Communications Holdings, LLC, Integrated Telecommunication Services, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate 6.00% [8],[10],[11],[20] 6.00% [15],[16],[17],[22] 6.00% [8],[10],[11],[20] 6.00% [8],[10],[11],[20] 6.00% [15],[16],[17],[22] 6.00% [15],[16],[17],[22]
Investment owned, balance, principal amount $ 4,881 [10],[13],[20] $ 4,881 [15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] 3,845          
Fair Value, Ending Balance 3,577 [10],[20] $ 3,845 [15],[22]        
Investment, Identifier [Axis]: GKD Index Partners, LLC, Specialized Finance, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   7.00%     7.00% 7.00%
Investment, interest rate [14],[15],[16],[17],[19]   10.60%     10.60% 10.60%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 1,280        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 1,262          
Fair Value, Ending Balance [14],[15],[16],[19]   $ 1,262        
Investment, Identifier [Axis]: GKD Index Partners, LLC, Specialized Finance, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   7.00%     7.00% 7.00%
Investment, interest rate [14],[15],[16],[17]   10.67%     10.67% 10.67%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 25,128        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 24,851          
Fair Value, Ending Balance [14],[15],[16]   $ 24,851        
Investment, Identifier [Axis]: Galileo Parent, Inc., Aerospace & Defense, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 7.25%   7.25% 7.25%    
Investment, interest rate [7],[8],[9],[10],[11] 12.64%   12.64% 12.64%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 1,638          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ 1,535          
Investment, Identifier [Axis]: Galileo Parent, Inc., Aerospace & Defense, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.25%   7.25% 7.25%    
Investment, interest rate [7],[8],[10],[11] 12.64%   12.64% 12.64%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 23,774          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 23,110          
Investment, Identifier [Axis]: Gibson Brands, Inc., Leisure Products, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 5.00%   5.00% 5.00%    
Investment, interest rate [7],[8],[10],[11] 10.57%   10.57% 10.57%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 2,456          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 2,063          
Investment, Identifier [Axis]: Global Medical Response, Inc., Health Care Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   4.25%     4.25% 4.25%
Investment, interest rate [15],[16],[17]   7.37%     7.37% 7.37%
Investment owned, balance, principal amount [15],[16],[18]   $ 5,572        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 4,848          
Fair Value, Ending Balance [15],[16]   $ 4,848        
Investment, Identifier [Axis]: GoldenTree Loan Management EUR CLO 2 DAC, Multi-Sector Holdings, CLO Notes            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [10],[11],[20] 2.85%   2.85% 2.85%    
Investment, interest rate [8],[10],[11],[20] 6.56%   6.56% 6.56%    
Investment owned, balance, principal amount | € [10],[11],[13],[20]     € 1,000      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[11],[20] $ 963          
Investment, Identifier [Axis]: Grove Hotel Parcel Owner, LLC, Hotels, Resorts & Cruise Lines, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.00% [7],[9],[10],[11] 8.00% [14],[15],[16],[19] 8.00% [7],[9],[10],[11] 8.00% [7],[9],[10],[11] 8.00% [14],[15],[16],[19] 8.00% [14],[15],[16],[19]
Investment owned, balance, principal amount $ 0 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (25)          
Fair Value, Ending Balance $ (35) [7],[9],[10],[11] $ (25) [14],[15],[16],[19]        
Investment, Identifier [Axis]: Grove Hotel Parcel Owner, LLC, Hotels, Resorts & Cruise Lines, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.00% [7],[10],[11] 8.00% [14],[15],[16] 8.00% [7],[10],[11] 8.00% [7],[10],[11] 8.00% [14],[15],[16] 8.00% [14],[15],[16]
Investment, interest rate 13.42% [7],[8],[10],[11] 11.04% [14],[15],[16],[17] 13.42% [7],[8],[10],[11] 13.42% [7],[8],[10],[11] 11.04% [14],[15],[16],[17] 11.04% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 17,444 [7],[10],[11],[13] $ 14,311 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 14,060          
Fair Value, Ending Balance $ 17,096 [7],[10],[11] $ 14,060 [14],[15],[16]        
Investment, Identifier [Axis]: Grove Hotel Parcel Owner, LLC, Hotels, Resorts & Cruise Lines, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.00% [7],[9],[10],[11] 8.00% [14],[15],[16],[19] 8.00% [7],[9],[10],[11] 8.00% [7],[9],[10],[11] 8.00% [14],[15],[16],[19] 8.00% [14],[15],[16],[19]
Investment owned, balance, principal amount $ 0 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (50)          
Fair Value, Ending Balance $ (70) [7],[9],[10],[11] $ (50) [14],[15],[16],[19]        
Investment, Identifier [Axis]: Harbor Purchaser Inc., Education Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.25% [10],[11] 5.25% [15],[16] 5.25% [10],[11] 5.25% [10],[11] 5.25% [15],[16] 5.25% [15],[16]
Investment, interest rate 10.67% [8],[10],[11] 8.38% [15],[16],[17] 10.67% [8],[10],[11] 10.67% [8],[10],[11] 8.38% [15],[16],[17] 8.38% [15],[16],[17]
Investment owned, balance, principal amount $ 14,347 [10],[11],[13] $ 9,392 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 8,582          
Fair Value, Ending Balance $ 13,618 [10],[11] $ 8,582 [15],[16]        
Investment, Identifier [Axis]: Harrow , Inc., Pharmaceuticals, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11],[20] 11.89%   11.89% 11.89%    
Investment owned, balance, principal amount [7],[10],[11],[13],[20] $ 7,448          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] $ 7,301          
Investment, Identifier [Axis]: Harrow, Inc., Pharmaceuticals, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11],[20] 6.50%   6.50% 6.50%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13],[20] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11],[20] $ (79)          
Investment, Identifier [Axis]: Harrow, Inc., Pharmaceuticals, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11],[20] 12.04%   12.04% 12.04%    
Investment owned, balance, principal amount [7],[10],[11],[13],[20] $ 1,432          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] $ 1,404          
Investment, Identifier [Axis]: Horizon Aircraft Finance I Ltd., Specialized Finance, CLO Notes            
Schedule of Investments [Line Items]            
Investment, interest rate [8],[10],[11],[20] 4.46%   4.46% 4.46%    
Investment owned, balance, principal amount [10],[13],[20] $ 6,808          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[20] $ 5,873          
Investment, Identifier [Axis]: IAMGOLD Corporation, Gold, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 8.25%   8.25% 8.25%    
Investment, interest rate [7],[8],[10],[11],[20] 13.62%   13.62% 13.62%    
Investment owned, balance, principal amount [7],[10],[11],[13],[20] $ 23,975          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] $ 23,328          
Investment, Identifier [Axis]: INW Manufacturing, LLC, Personal Care Products, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 5.75%   5.75% 5.75%    
Investment, interest rate [7],[8],[10],[11] 11.40%   11.40% 11.40%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 44,550          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 35,046          
Investment, Identifier [Axis]: INW Manufacturing, LLC, Personal Products, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   5.75%     5.75% 5.75%
Investment, interest rate [14],[15],[16],[17]   9.42%     9.42% 9.42%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 35,625        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 31,528          
Fair Value, Ending Balance [14],[15],[16]   $ 31,528        
Investment, Identifier [Axis]: IPC Corp., Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.50% [7],[10],[11] 6.50% [14],[15],[16] 6.50% [7],[10],[11] 6.50% [7],[10],[11] 6.50% [14],[15],[16] 6.50% [14],[15],[16]
Investment, interest rate 11.92% [7],[8],[10],[11] 9.44% [14],[15],[16],[17] 11.92% [7],[8],[10],[11] 11.92% [7],[8],[10],[11] 9.44% [14],[15],[16],[17] 9.44% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 40,587 [7],[10],[11],[13] $ 34,357 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 32,639          
Fair Value, Ending Balance 38,963 [7],[10],[11] $ 32,639 [14],[15],[16]        
Investment, Identifier [Axis]: Immucor, Inc., Health Care Supplies, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   5.75%     5.75% 5.75%
Investment, interest rate [14],[15],[16],[17]   9.42%     9.42% 9.42%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 8,569        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 8,407          
Fair Value, Ending Balance [14],[15],[16]   $ 8,407        
Investment, Identifier [Axis]: Immucor, Inc., Health Care Supplies, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   8.00%     8.00% 8.00%
Investment, interest rate [14],[15],[16],[17]   11.67%     11.67% 11.67%
Investment, interest rate, paid in kind [14],[15],[16]   3.50%     3.50% 3.50%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 22,619        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 22,275          
Fair Value, Ending Balance [14],[15],[16]   22,275        
Investment, Identifier [Axis]: Impel Neuropharma, Inc., Health Care Technology, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment owned, balance, principal amount [14],[15],[18],[26]   13,083        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[26] 13,083          
Fair Value, Ending Balance [14],[15],[26]   $ 13,083        
Investment, Identifier [Axis]: Impel Neuropharma, Inc., Health Care Technology, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   8.75%     8.75% 8.75%
Investment, interest rate [14],[15],[16],[17]   12.45%     12.45% 12.45%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 12,161        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 11,942          
Fair Value, Ending Balance [14],[15],[16]   $ 11,942        
Investment, Identifier [Axis]: Impel Pharmaceuticals Inc., Health Care Technology, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 350,241   350,241 350,241    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance $ 147          
Investment, Identifier [Axis]: Impel Pharmaceuticals Inc., Health Care Technology, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 10.75%   10.75% 10.75%    
Investment, interest rate, paid in kind [7],[9],[10],[11] 16.06%   16.06% 16.06%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 688          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ 688          
Investment, Identifier [Axis]: Impel Pharmaceuticals Inc., Health Care Technology, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 10.75%   10.75% 10.75%    
Investment, interest rate, paid in kind [7],[10],[11] 16.06%   16.06% 16.06%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 26,613          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 24,484          
Investment, Identifier [Axis]: Impel Pharmaceuticals Inc., Health Care Technology, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 10.75%   10.75% 10.75%    
Investment, interest rate, paid in kind [7],[10],[11] 16.05%   16.05% 16.05%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 787          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 787          
Investment, Identifier [Axis]: Innocoll Pharmaceuticals Limited, Health Care Technology, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[11],[20] 5.75%   5.75% 5.75%    
Investment, interest rate 11.14% [7],[8],[11],[20] 11.00% [14],[15],[16],[17],[22] 11.14% [7],[8],[11],[20] 11.14% [7],[8],[11],[20] 11.00% [14],[15],[16],[17],[22] 11.00% [14],[15],[16],[17],[22]
Investment, interest rate, paid in kind [7],[11],[20] 2.75%   2.75% 2.75%    
Investment owned, balance, principal amount $ 7,179 [7],[11],[13],[20] $ 6,817 [14],[15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] 6,408          
Fair Value, Ending Balance 6,568 [7],[11],[20] $ 6,408 [14],[15],[22]        
Investment, Identifier [Axis]: Innocoll Pharmaceuticals Limited, Health Care Technology, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, interest rate [14],[15],[16],[17],[19],[22]   11.00%     11.00% 11.00%
Investment owned, balance, principal amount [14],[15],[18],[19],[22]   $ 0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[19],[22] $ 0          
Fair Value, Ending Balance [14],[15],[19],[22]   $ 0        
Investment, Identifier [Axis]: Innocoll Pharmaceuticals Limited, Health Care Technology, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 112,990 [7],[10],[20] 56,999 [14],[15],[22] 112,990 [7],[10],[20] 112,990 [7],[10],[20] 56,999 [14],[15],[22] 56,999 [14],[15],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 609          
Fair Value, Ending Balance $ 105 [7],[10],[20] $ 609 [14],[15],[22]        
Investment, Identifier [Axis]: Integral Development Corporation, Diversified Financial Services, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10] 1,078,284   1,078,284 1,078,284    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10] $ 0          
Investment, Identifier [Axis]: Integral Development Corporation, Other Diversified Financial Services, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15]   1,078,284     1,078,284 1,078,284
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 0          
Fair Value, Ending Balance [14],[15]   $ 0        
Investment, Identifier [Axis]: Inventus Power, Inc., Electrical Components & Equipment, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 7.50%   7.50% 7.50%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ (86)          
Investment, Identifier [Axis]: Inventus Power, Inc., Electrical Components & Equipment, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.50% [7],[10],[11] 5.00% [14],[15],[16] 7.50% [7],[10],[11] 7.50% [7],[10],[11] 5.00% [14],[15],[16] 5.00% [14],[15],[16]
Investment, interest rate 12.93% [7],[8],[10],[11] 8.55% [14],[15],[16],[17] 12.93% [7],[8],[10],[11] 12.93% [7],[8],[10],[11] 8.55% [14],[15],[16],[17] 8.55% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 33,414 [7],[10],[11],[13] $ 18,660 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 18,134          
Fair Value, Ending Balance 32,659 [7],[10],[11] $ 18,134 [14],[15],[16]        
Investment, Identifier [Axis]: Inventus Power, Inc., Electrical Components & Equipment, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   8.50%     8.50% 8.50%
Investment, interest rate [14],[15],[16],[17]   12.17%     12.17% 12.17%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 13,674        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 13,154          
Fair Value, Ending Balance [14],[15],[16]   $ 13,154        
Investment, Identifier [Axis]: Ivanti Software, Inc., Application Software, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.25% [10],[11] 7.25% [15],[16] 7.25% [10],[11] 7.25% [10],[11] 7.25% [15],[16] 7.25% [15],[16]
Investment, interest rate 12.78% [8],[10],[11] 10.33% [15],[16],[17] 12.78% [8],[10],[11] 12.78% [8],[10],[11] 10.33% [15],[16],[17] 10.33% [15],[16],[17]
Investment owned, balance, principal amount $ 13,939 [10],[11],[13] $ 10,247 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 7,702          
Fair Value, Ending Balance 10,094 [10],[11] $ 7,702 [15],[16]        
Investment, Identifier [Axis]: JP Morgan Prime Money Market Fund, Institutional Shares            
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance 83,262          
Investment, Identifier [Axis]: Jazz Acquisition, Inc., Aerospace & Defense, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   7.50%     7.50% 7.50%
Investment, interest rate [14],[15],[16],[17]   10.62%     10.62% 10.62%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 36,234        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 36,392          
Fair Value, Ending Balance [14],[15],[16]   $ 36,392        
Investment, Identifier [Axis]: Jazz Acquisition, Inc., Aerospace & Defense, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   8.00%     8.00% 8.00%
Investment, interest rate [15],[16],[17]   11.12%     11.12% 11.12%
Investment owned, balance, principal amount [15],[16],[18]   $ 528        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 481          
Fair Value, Ending Balance [15],[16]   $ 481        
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   6.50%     6.50% 6.50%
Investment, interest rate [14],[15],[16],[17],[19]   10.17%     10.17% 10.17%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 329        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] $ 292          
Fair Value, Ending Balance [14],[15],[16],[19]   $ 292        
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Revolver 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[9],[10],[11] 11.84%   11.84% 11.84%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 272          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ 238          
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Revolver 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 6.50%   6.50% 6.50%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] (47)          
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   6.50%     6.50% 6.50%
Investment, interest rate [14],[15],[16],[17]   10.17%     10.17% 10.17%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 13,623        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 13,351          
Fair Value, Ending Balance [14],[15],[16]   $ 13,351        
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11] 11.84%   11.84% 11.84%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 16,752          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 16,500          
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.50%   6.50% 6.50%    
Investment, interest rate [7],[8],[10],[11] 11.80%   11.80% 11.80%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 38,015          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 37,445          
Investment, Identifier [Axis]: LSL Holdco, LLC, Health Care Distributors, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.00% [7],[9],[10],[11] 6.00% [14],[15],[16],[19] 6.00% [7],[9],[10],[11] 6.00% [7],[9],[10],[11] 6.00% [14],[15],[16],[19] 6.00% [14],[15],[16],[19]
Investment, interest rate [14],[15],[16],[17],[19]   9.12%     9.12% 9.12%
Investment owned, balance, principal amount $ 0 [7],[9],[10],[11],[13] $ 1,710 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 1,651          
Fair Value, Ending Balance (172) [7],[9],[10],[11] $ 1,651 [14],[15],[16],[19]        
Investment, Identifier [Axis]: LSL Holdco, LLC, Health Care Distributors, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   6.00%     6.00% 6.00%
Investment, interest rate [14],[15],[16],[17]   9.12%     9.12% 9.12%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 19,236        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 18,707          
Fair Value, Ending Balance [14],[15],[16]   $ 18,707        
Investment, Identifier [Axis]: LSL Holdco, LLC, Health Care Distributors, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.00%   6.00% 6.00%    
Investment, interest rate [7],[8],[10],[11] 11.42%   11.42% 11.42%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 2,736          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 2,558          
Investment, Identifier [Axis]: LSL Holdco, LLC, Health Care Distributors, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.00%   6.00% 6.00%    
Investment, interest rate [7],[8],[10],[11] 11.42%   11.42% 11.42%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 23,494          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 21,967          
Investment, Identifier [Axis]: LTI Holdings, Inc., Electronic Components, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   6.75%     6.75% 6.75%
Investment, interest rate [15],[16],[17]   9.87%     9.87% 9.87%
Investment owned, balance, principal amount [15],[16],[18]   $ 2,140        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 1,890          
Fair Value, Ending Balance [15],[16]   $ 1,890        
Investment, Identifier [Axis]: LaserShip, Inc., Air Freight & Logistics, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   7.50%     7.50% 7.50%
Investment, interest rate [14],[15],[16],[17]   10.38%     10.38% 10.38%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 2,394        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 1,867          
Fair Value, Ending Balance [14],[15],[16]   $ 1,867        
Investment, Identifier [Axis]: Latam Airlines Group S.A., Passenger Airlines, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [10],[11],[20] 9.50%   9.50% 9.50%    
Investment, interest rate [8],[10],[11],[20] 14.95%   14.95% 14.95%    
Investment owned, balance, principal amount [10],[11],[13],[20] $ 26,422          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[11],[20] $ 27,512          
Investment, Identifier [Axis]: Lift Brands Holdings, Inc., Leisure Facilities, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 2,000,000 [7],[10] 2,000,000 [14],[15] 2,000,000 [7],[10] 2,000,000 [7],[10] 2,000,000 [14],[15] 2,000,000 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 0          
Fair Value, Ending Balance $ 0 [7],[10] $ 0 [14],[15]        
Investment, Identifier [Axis]: Lightbox Intermediate, L.P., Real Estate Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.00% [7],[10],[11] 5.00% [14],[15],[16] 5.00% [7],[10],[11] 5.00% [7],[10],[11] 5.00% [14],[15],[16] 5.00% [14],[15],[16]
Investment, interest rate 10.65% [7],[8],[10],[11] 8.67% [14],[15],[16],[17] 10.65% [7],[8],[10],[11] 10.65% [7],[8],[10],[11] 8.67% [14],[15],[16],[17] 8.67% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 45,243 [7],[10],[11],[13] $ 41,008 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 39,573          
Fair Value, Ending Balance $ 43,886 [7],[10],[11] $ 39,573 [14],[15],[16]        
Investment, Identifier [Axis]: Liquid Environmental Solutions Corporation, Environmental & Facilities Services, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 559 [7],[10] 451 [14],[15] 559 [7],[10] 559 [7],[10] 451 [14],[15] 451 [14],[15]
Investment owned, balance, principal amount [7],[10],[13]          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] 451          
Fair Value, Ending Balance $ 372 [7],[10] $ 451 [14],[15]        
Investment, Identifier [Axis]: Liquid Environmental Solutions Corporation, Environmental & Facilities Services, Second Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.50% [7],[10],[11] 8.50% [14],[15],[16] 8.50% [7],[10],[11] 8.50% [7],[10],[11] 8.50% [14],[15],[16] 8.50% [14],[15],[16]
Investment, interest rate 13.99% [7],[8],[10],[11] 11.38% [14],[15],[16],[17] 13.99% [7],[8],[10],[11] 13.99% [7],[8],[10],[11] 11.38% [14],[15],[16],[17] 11.38% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 5,403 [7],[10],[11],[13] $ 4,357 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 4,226          
Fair Value, Ending Balance $ 5,160 [7],[10],[11] $ 4,226 [14],[15],[16]        
Investment, Identifier [Axis]: Liquid Environmental Solutions Corporation, Environmental & Facilities Services, Second Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.50% [7],[9],[10],[11] 8.50% [14],[15],[16],[19] 8.50% [7],[9],[10],[11] 8.50% [7],[9],[10],[11] 8.50% [14],[15],[16],[19] 8.50% [14],[15],[16],[19]
Investment, interest rate 13.99% [7],[8],[9],[10],[11] 11.38% [14],[15],[16],[17],[19] 13.99% [7],[8],[9],[10],[11] 13.99% [7],[8],[9],[10],[11] 11.38% [14],[15],[16],[17],[19] 11.38% [14],[15],[16],[17],[19]
Investment owned, balance, principal amount $ 2,939 [7],[9],[10],[11],[13] $ 2,370 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 2,265          
Fair Value, Ending Balance $ 2,745 [7],[9],[10],[11] $ 2,265 [14],[15],[16],[19]        
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC, Diversified Support Services, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.00% [7],[9],[10],[11] 6.00% [14],[15],[16],[19] 6.00% [7],[9],[10],[11] 6.00% [7],[9],[10],[11] 6.00% [14],[15],[16],[19] 6.00% [14],[15],[16],[19]
Investment, interest rate [7],[8],[9],[10],[11] 11.42%   11.42% 11.42%    
Investment owned, balance, principal amount $ 964 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (54)          
Fair Value, Ending Balance 938 [7],[9],[10],[11] $ (54) [14],[15],[16],[19]        
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC, Diversified Support Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   6.00%     6.00% 6.00%
Investment, interest rate [14],[15],[16],[17]   9.50%     9.50% 9.50%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 18,390        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 17,691          
Fair Value, Ending Balance [14],[15],[16]   $ 17,691        
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC, Diversified Support Services, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.00%   6.00% 6.00%    
Investment, interest rate [7],[8],[10],[11] 11.52%   11.52% 11.52%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 20,125          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 19,823          
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC, Diversified Support Services, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.00%   6.00% 6.00%    
Investment, interest rate [7],[8],[10],[11] 11.52%   11.52% 11.52%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 2,631          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 2,591          
Investment, Identifier [Axis]: MND Holdings III Corp, Other Specialty Retail, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 7.50%   7.50% 7.50%    
Investment, interest rate [7],[8],[9],[10],[11] 12.83%   12.83% 12.83%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 1,466          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ 1,282          
Investment, Identifier [Axis]: MND Holdings III Corp, Other Specialty Retail, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.50%   7.50% 7.50%    
Investment, interest rate [7],[8],[10],[11] 12.89%   12.89% 12.89%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 40,538          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 39,833          
Investment, Identifier [Axis]: MRI Software LLC, Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.50% [7],[9],[10],[11] 5.50% [14],[15],[16],[19] 5.50% [7],[9],[10],[11] 5.50% [7],[9],[10],[11] 5.50% [14],[15],[16],[19] 5.50% [14],[15],[16],[19]
Investment owned, balance, principal amount $ 0 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (51)          
Fair Value, Ending Balance $ (47) [7],[9],[10],[11] $ (51) [14],[15],[16],[19]        
Investment, Identifier [Axis]: MRI Software LLC, Application Software, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.50% [7],[10],[11] 5.50% [14],[15],[16] 5.50% [7],[10],[11] 5.50% [7],[10],[11] 5.50% [14],[15],[16] 5.50% [14],[15],[16]
Investment, interest rate 10.99% [7],[8],[10],[11] 9.17% [14],[15],[16],[17] 10.99% [7],[8],[10],[11] 10.99% [7],[8],[10],[11] 9.17% [14],[15],[16],[17] 9.17% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 13,973 [7],[10],[11],[13] $ 29,565 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 28,734          
Fair Value, Ending Balance $ 13,685 [7],[10],[11] $ 28,734 [14],[15],[16]        
Investment, Identifier [Axis]: MRI Software LLC, Application Software, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.50% [7],[10],[11] 5.50% [14],[15],[16],[19] 5.50% [7],[10],[11] 5.50% [7],[10],[11] 5.50% [14],[15],[16],[19] 5.50% [14],[15],[16],[19]
Investment, interest rate [7],[8],[10],[11] 10.99%   10.99% 10.99%    
Investment owned, balance, principal amount $ 21,328 [7],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (96)          
Fair Value, Ending Balance $ 20,888 [7],[10],[11] $ (96) [14],[15],[16],[19]        
Investment, Identifier [Axis]: Marinus Pharmaceuticals, Inc., Pharmaceuticals, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, interest rate 11.50% [7],[8],[10],[11],[20] 11.50% [14],[15],[16],[17],[22] 11.50% [7],[8],[10],[11],[20] 11.50% [7],[8],[10],[11],[20] 11.50% [14],[15],[16],[17],[22] 11.50% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount $ 8,568 [7],[10],[13],[20] $ 17,203 [14],[15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] 16,644          
Fair Value, Ending Balance $ 8,132 [7],[10],[20] $ 16,644 [14],[15],[22]        
Investment, Identifier [Axis]: Marinus Pharmaceuticals, Inc., Pharmaceuticals, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, interest rate 11.50% [7],[8],[10],[11],[20] 11.50% [14],[15],[16],[17],[19],[22] 11.50% [7],[8],[10],[11],[20] 11.50% [7],[8],[10],[11],[20] 11.50% [14],[15],[16],[17],[19],[22] 11.50% [14],[15],[16],[17],[19],[22]
Investment owned, balance, principal amount $ 4,284 [7],[10],[13],[20] $ 0 [14],[15],[18],[19],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[19],[22] 0          
Fair Value, Ending Balance $ 4,066 [7],[10],[20] $ 0 [14],[15],[19],[22]        
Investment, Identifier [Axis]: Marinus Pharmaceuticals, Inc., Pharmaceuticals, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[10],[11],[20] 11.50%   11.50% 11.50%    
Investment owned, balance, principal amount [7],[10],[13],[20] $ 8,568          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20] $ 8,132          
Investment, Identifier [Axis]: Mesoblast, Inc., Biotechnology, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, interest rate 8.00% [7],[8],[10],[11],[20] 8.00% [14],[15],[16],[17],[22] 8.00% [7],[8],[10],[11],[20] 8.00% [7],[8],[10],[11],[20] 8.00% [14],[15],[16],[17],[22] 8.00% [14],[15],[16],[17],[22]
Investment, interest rate, paid in kind 1.75% [7],[10],[20] 1.75% [14],[15],[22] 1.75% [7],[10],[20] 1.75% [7],[10],[20] 1.75% [14],[15],[22] 1.75% [14],[15],[22]
Investment owned, balance, principal amount $ 9,106 [7],[10],[13],[20] $ 7,215 [14],[15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] 6,440          
Fair Value, Ending Balance 8,013 [7],[10],[20] $ 6,440 [14],[15],[22]        
Investment, Identifier [Axis]: Mesoblast, Inc., Biotechnology, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, interest rate [14],[15],[16],[17],[19],[22]   8.00%     8.00% 8.00%
Investment, interest rate, paid in kind [14],[15],[19],[22]   1.75%     1.75% 1.75%
Investment owned, balance, principal amount [14],[15],[18],[19],[22]   $ 0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[19],[22] 0          
Fair Value, Ending Balance [14],[15],[19],[22]   $ 0        
Investment, Identifier [Axis]: Mesoblast, Inc., Biotechnology, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15],[22]   209,588     209,588 209,588
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 170          
Fair Value, Ending Balance [14],[15],[22]   $ 170        
Investment, Identifier [Axis]: Mesoblast, Inc., Biotechnology, Warrants 1            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10],[20] 259,877   259,877 259,877    
Investment owned, balance, principal amount [7],[10],[13],[20]          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20] $ 78          
Investment, Identifier [Axis]: Mesoblast, Inc., Biotechnology, Warrants 2            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10],[20] 66,817   66,817 66,817    
Investment owned, balance, principal amount [7],[10],[13],[20]          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20] $ 33          
Investment, Identifier [Axis]: Mindbody, Inc., Internet Services & Infrastructure, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [7],[9],[10],[11] 8.00% [14],[15],[16],[19] 7.00% [7],[9],[10],[11] 7.00% [7],[9],[10],[11] 8.00% [14],[15],[16],[19] 8.00% [14],[15],[16],[19]
Investment owned, balance, principal amount $ 0 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (100)          
Fair Value, Ending Balance (76) [7],[9],[10],[11] $ (100) [14],[15],[16],[19]        
Investment, Identifier [Axis]: Mindbody, Inc., Internet Services & Infrastructure, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   7.00%     7.00% 7.00%
Investment, interest rate [14],[15],[16],[17]   10.64%     10.64% 10.64%
Investment, interest rate, paid in kind [14],[15],[16]   1.50%     1.50% 1.50%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 45,665        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 44,523          
Fair Value, Ending Balance [14],[15],[16]   $ 44,523        
Investment, Identifier [Axis]: Mindbody, Inc., Internet Services & Infrastructure, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.00%   7.00% 7.00%    
Investment, interest rate [7],[8],[10],[11] 12.52%   12.52% 12.52%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 5,248          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 5,164          
Investment, Identifier [Axis]: Mindbody, Inc., Internet Services & Infrastructure, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.00%   7.00% 7.00%    
Investment, interest rate [7],[8],[10],[11] 12.52%   12.52% 12.52%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 46,687          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 45,940          
Investment, Identifier [Axis]: Mosaic Companies, LLC, Home Improvement Retail, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.75% [7],[10],[11] 6.75% [14],[15],[16] 6.75% [7],[10],[11] 6.75% [7],[10],[11] 6.75% [14],[15],[16] 6.75% [14],[15],[16]
Investment, interest rate 12.51% [7],[8],[10],[11] 9.89% [14],[15],[16],[17] 12.51% [7],[8],[10],[11] 12.51% [7],[8],[10],[11] 9.89% [14],[15],[16],[17] 9.89% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 54,559 [7],[10],[11],[13] $ 46,499 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 45,421          
Fair Value, Ending Balance $ 53,168 [7],[10],[11] $ 45,421 [14],[15],[16]        
Investment, Identifier [Axis]: NFP Corp., Diversified Financial Services, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate [8],[10],[11] 6.88%   6.88% 6.88%    
Investment owned, balance, principal amount [10],[13] $ 10,191          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10] 8,743          
Investment, Identifier [Axis]: NFP Corp., Other Diversified Financial Services, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17]   6.88%     6.88% 6.88%
Investment owned, balance, principal amount [15],[18]   $ 10,191        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15] $ 7,966          
Fair Value, Ending Balance [15]   $ 7,966        
Investment, Identifier [Axis]: NN, Inc., Industrial Machinery & Supplies & Components, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 6.88%   6.88% 6.88%    
Investment, interest rate [7],[8],[10],[11],[20] 12.29%   12.29% 12.29%    
Investment, interest rate, paid in kind [7],[10],[11],[20] 2.00%   2.00% 2.00%    
Investment owned, balance, principal amount [7],[10],[11],[13],[20] $ 73,362          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] $ 69,694          
Investment, Identifier [Axis]: NN, Inc., Industrial Machinery & Supplies & Components, Warrants 1            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 487,870   487,870 487,870    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[20] $ 903          
Investment, Identifier [Axis]: NN, Inc., Industrial Machinery & Supplies & Components, Warrants 2            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 487,870   487,870 487,870    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[20] $ 903          
Investment, Identifier [Axis]: NN, Inc., Industrial Machinery, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[22]   6.88%     6.88% 6.88%
Investment, interest rate [14],[15],[16],[17],[22]   9.99%     9.99% 9.99%
Investment owned, balance, principal amount [14],[15],[16],[18],[22]   $ 58,713        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] $ 56,805          
Fair Value, Ending Balance [14],[15],[16],[22]   $ 56,805        
Investment, Identifier [Axis]: Navisite, LLC, Data Processing & Outsourced Services, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.50% [7],[10],[11] 8.50% [14],[15],[16] 8.50% [7],[10],[11] 8.50% [7],[10],[11] 8.50% [14],[15],[16] 8.50% [14],[15],[16]
Investment, interest rate 13.99% [7],[8],[10],[11] 12.17% [14],[15],[16],[17] 13.99% [7],[8],[10],[11] 13.99% [7],[8],[10],[11] 12.17% [14],[15],[16],[17] 12.17% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 30,339 [7],[10],[11],[13] $ 22,560 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 21,524          
Fair Value, Ending Balance $ 29,007 [7],[10],[11] $ 21,524 [14],[15],[16]        
Investment, Identifier [Axis]: NeuAG, LLC, Fertilizers & Agricultural Chemicals, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 9.50% [7],[10],[11] 10.50% [14],[15],[16] 9.50% [7],[10],[11] 9.50% [7],[10],[11] 10.50% [14],[15],[16] 10.50% [14],[15],[16]
Investment, interest rate 14.89% [7],[8],[10],[11] 14.17% [14],[15],[16],[17] 14.89% [7],[8],[10],[11] 14.89% [7],[8],[10],[11] 14.17% [14],[15],[16],[17] 14.17% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 64,606 [7],[10],[11],[13] $ 50,459 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 51,972          
Fair Value, Ending Balance $ 63,185 [7],[10],[11] $ 51,972 [14],[15],[16]        
Investment, Identifier [Axis]: OCSI Glick JV LLC, Multi-Sector Holdings, Membership Interest            
Schedule of Investments [Line Items]            
Investment owned, ownership percentage 87.50% [9],[20],[28],[29] 87.50% [1],[2],[19],[22],[30],[31] 87.50% [9],[20],[28],[29] 87.50% [9],[20],[28],[29] 87.50% [1],[2],[19],[22],[30],[31] 87.50% [1],[2],[19],[22],[30],[31]
Net Realized Gain (Loss) $ 0 $ 0        
Amount of Interest, Fees or Dividends Credited in Income 0 0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 0 [1],[2],[19],[22],[30],[31] 0        
Gross Additions 0 0        
Gross Reductions 0 0        
Fair Value, Ending Balance $ 0 [9],[20],[28],[29] $ 0 [1],[2],[19],[22],[30],[31]        
Investment owned, percent of net assets 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Investment, Identifier [Axis]: OCSI Glick JV LLC, Multi-Sector Holdings, Subordinated Debt            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 4.50% [7],[9],[11],[20],[28] 4.50% [1],[2],[14],[16],[19],[22],[30] 4.50% [7],[9],[11],[20],[28] 4.50% [7],[9],[11],[20],[28] 4.50% [1],[2],[14],[16],[19],[22],[30] 4.50% [1],[2],[14],[16],[19],[22],[30]
Investment, interest rate 9.76% [7],[8],[9],[11],[20],[28] 6.30% [1],[2],[14],[16],[17],[19],[22],[30] 9.76% [7],[8],[9],[11],[20],[28] 9.76% [7],[8],[9],[11],[20],[28] 6.30% [1],[2],[14],[16],[17],[19],[22],[30] 6.30% [1],[2],[14],[16],[17],[19],[22],[30]
Investment owned, balance, principal amount $ 58,349 [7],[9],[11],[13],[20],[28] $ 59,662 [1],[2],[14],[16],[18],[19],[22],[30]        
Net Realized Gain (Loss) 0 0        
Amount of Interest, Fees or Dividends Credited in Income 6,748 4,667        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 50,283 [1],[2],[14],[16],[19],[22],[30] 55,582        
Gross Additions 1,448 1,538        
Gross Reductions (1,714) (6,837)        
Fair Value, Ending Balance $ 50,017 [7],[9],[11],[20],[28] $ 50,283 [1],[2],[14],[16],[19],[22],[30]        
Investment owned, percent of net assets 3.30% 4.00% 3.30% 3.30% 4.00% 4.00%
Investment, Identifier [Axis]: OEConnection LLC, Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   4.00%     4.00% 4.00%
Investment, interest rate [15],[16],[17]   7.12%     7.12% 7.12%
Investment owned, balance, principal amount [15],[16],[18]   $ 3,323        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 3,207          
Fair Value, Ending Balance [15],[16]   $ 3,207        
Investment, Identifier [Axis]: OEConnection LLC, Application Software, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [7],[10],[11] 7.00% [14],[15],[16] 7.00% [7],[10],[11] 7.00% [7],[10],[11] 7.00% [14],[15],[16] 7.00% [14],[15],[16]
Investment, interest rate 12.49% [7],[8],[10],[11] 10.05% [14],[15],[16],[17] 12.49% [7],[8],[10],[11] 12.49% [7],[8],[10],[11] 10.05% [14],[15],[16],[17] 10.05% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 9,323 [7],[10],[11],[13] $ 7,519 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 7,237          
Fair Value, Ending Balance $ 9,183 [7],[10],[11] $ 7,237 [14],[15],[16]        
Investment, Identifier [Axis]: OTG Management, LLC, Airport Services, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 10.00% [7],[10],[11] 2.00% [14],[15],[16] 10.00% [7],[10],[11] 10.00% [7],[10],[11] 2.00% [14],[15],[16] 2.00% [14],[15],[16]
Investment, interest rate [14],[15],[16],[17]   5.08%     5.08% 5.08%
Investment, interest rate, paid in kind 15.67% [7],[10],[11] 8.00% [14],[15],[16] 15.67% [7],[10],[11] 15.67% [7],[10],[11] 8.00% [14],[15],[16] 8.00% [14],[15],[16]
Investment owned, balance, principal amount $ 25,712 [7],[10],[11],[13] $ 21,557 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 21,557          
Fair Value, Ending Balance $ 25,069 [7],[10],[11] $ 21,557 [14],[15],[16]        
Investment, Identifier [Axis]: OTG Management, LLC, Airport Services, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 10.00% [7],[9],[10],[11] 2.00% [14],[15],[16],[19] 10.00% [7],[9],[10],[11] 10.00% [7],[9],[10],[11] 2.00% [14],[15],[16],[19] 2.00% [14],[15],[16],[19]
Investment owned, balance, principal amount $ 0 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 0          
Fair Value, Ending Balance $ (69) [7],[9],[10],[11] $ 0 [14],[15],[16],[19]        
Investment, Identifier [Axis]: OTG Management, LLC, Airport Services, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 10.00%   10.00% 10.00%    
Investment, interest rate, paid in kind [7],[9],[10],[11] 15.64%   15.64% 15.64%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 1,210          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ 1,169          
Investment, Identifier [Axis]: Oranje Holdco, Inc., Systems Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 7.75%   7.75% 7.75%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ (36)          
Investment, Identifier [Axis]: Oranje Holdco, Inc., Systems Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.75%   7.75% 7.75%    
Investment, interest rate [7],[8],[10],[11] 13.12%   13.12% 13.12%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 15,231          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 14,945          
Investment, Identifier [Axis]: Other cash accounts            
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance $ 62,277          
Investment, Identifier [Axis]: P & L Development, LLC, Pharmaceuticals, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate 7.75% [8],[10],[11] 7.75% [15],[16],[17] 7.75% [8],[10],[11] 7.75% [8],[10],[11] 7.75% [15],[16],[17] 7.75% [15],[16],[17]
Investment owned, balance, principal amount $ 4,519 [10],[13] $ 7,776 [15],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15] 5,846          
Fair Value, Ending Balance 3,305 [10] $ 5,846 [15]        
Investment, Identifier [Axis]: PFNY Holdings, LLC, Leisure Facilities, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   7.00%     7.00% 7.00%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 0        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (13)          
Fair Value, Ending Balance [14],[15],[16],[19]   $ (13)        
Investment, Identifier [Axis]: PFNY Holdings, LLC, Leisure Facilities, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   7.00%     7.00% 7.00%
Investment, interest rate [14],[15],[16],[17]   9.28%     9.28% 9.28%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 26,154        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 25,893          
Fair Value, Ending Balance [14],[15],[16]   $ 25,893        
Investment, Identifier [Axis]: PFNY Holdings, LLC, Leisure Facilities, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[19]   7.00%     7.00% 7.00%
Investment, interest rate [14],[15],[16],[17],[19]   9.25%     9.25% 9.25%
Investment owned, balance, principal amount [14],[15],[16],[18],[19]   $ 2,228        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] $ 2,203          
Fair Value, Ending Balance [14],[15],[16],[19]   $ 2,203        
Investment, Identifier [Axis]: PPW Aero Buyer, Inc., Aerospace & Defense, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 7.00%   7.00% 7.00%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ (54)          
Investment, Identifier [Axis]: PPW Aero Buyer, Inc., Aerospace & Defense, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.00%   7.00% 7.00%    
Investment, interest rate [7],[8],[10],[11] 12.32%   12.32% 12.32%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 10,895          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 10,495          
Investment, Identifier [Axis]: PRGX Global, Inc., Data Processing & Outsourced Services, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 100,000 [7],[10] 80,515 [14],[15] 100,000 [7],[10] 100,000 [7],[10] 80,515 [14],[15] 80,515 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 89          
Fair Value, Ending Balance $ 248 [7],[10] $ 89 [14],[15]        
Investment, Identifier [Axis]: PRGX Global, Inc., Data Processing & Outsourced Services, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.50% [7],[9],[10],[11] 6.75% [14],[15],[16],[19] 6.50% [7],[9],[10],[11] 6.50% [7],[9],[10],[11] 6.75% [14],[15],[16],[19] 6.75% [14],[15],[16],[19]
Investment owned, balance, principal amount $ 0 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (49)          
Fair Value, Ending Balance $ (3) [7],[9],[10],[11] $ (49) [14],[15],[16],[19]        
Investment, Identifier [Axis]: PRGX Global, Inc., Data Processing & Outsourced Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.50% [7],[10],[11] 6.75% [14],[15],[16] 6.50% [7],[10],[11] 6.50% [7],[10],[11] 6.75% [14],[15],[16] 6.75% [14],[15],[16]
Investment, interest rate 12.01% [7],[8],[10],[11] 10.42% [14],[15],[16],[17] 12.01% [7],[8],[10],[11] 12.01% [7],[8],[10],[11] 10.42% [14],[15],[16],[17] 10.42% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 38,414 [7],[10],[11],[13] $ 33,775 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 33,116          
Fair Value, Ending Balance $ 38,380 [7],[10],[11] $ 33,116 [14],[15],[16]        
Investment, Identifier [Axis]: Park Place Technologies, LLC, Internet Services & Infrastructure, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.00% [10],[11] 5.00% [15],[16] 5.00% [10],[11] 5.00% [10],[11] 5.00% [15],[16] 5.00% [15],[16]
Investment, interest rate 10.42% [8],[10],[11] 8.13% [15],[16],[17] 10.42% [8],[10],[11] 10.42% [8],[10],[11] 8.13% [15],[16],[17] 8.13% [15],[16],[17]
Investment owned, balance, principal amount $ 9,676 [10],[11],[13] $ 9,850 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 9,374          
Fair Value, Ending Balance $ 9,551 [10],[11] $ 9,374 [15],[16]        
Investment, Identifier [Axis]: Performance Health Holdings, Inc., Health Care Distributors, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.00% [7],[10],[11] 6.00% [14],[15],[16] 6.00% [7],[10],[11] 6.00% [7],[10],[11] 6.00% [14],[15],[16] 6.00% [14],[15],[16]
Investment, interest rate 11.57% [7],[8],[10],[11] 8.88% [14],[15],[16],[17] 11.57% [7],[8],[10],[11] 11.57% [7],[8],[10],[11] 8.88% [14],[15],[16],[17] 8.88% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 22,375 [7],[10],[11],[13] $ 17,976 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 17,537          
Fair Value, Ending Balance $ 21,896 [7],[10],[11] $ 17,537 [14],[15],[16]        
Investment, Identifier [Axis]: Planview Parent, Inc., Application Software, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.25% [7],[10],[11] 7.25% [14],[15],[16] 7.25% [7],[10],[11] 7.25% [7],[10],[11] 7.25% [14],[15],[16] 7.25% [14],[15],[16]
Investment, interest rate 12.74% [7],[8],[10],[11] 10.92% [14],[15],[16],[17] 12.74% [7],[8],[10],[11] 12.74% [7],[8],[10],[11] 10.92% [14],[15],[16],[17] 10.92% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 36,499 [7],[10],[11],[13] $ 28,627 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 27,482          
Fair Value, Ending Balance $ 33,214 [7],[10],[11] $ 27,482 [14],[15],[16]        
Investment, Identifier [Axis]: Pluralsight, LLC, Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.00% [7],[9],[10],[11] 8.00% [14],[15],[16],[19] 8.00% [7],[9],[10],[11] 8.00% [7],[9],[10],[11] 8.00% [14],[15],[16],[19] 8.00% [14],[15],[16],[19]
Investment, interest rate [7],[8],[9],[10],[11] 13.45%   13.45% 13.45%    
Investment owned, balance, principal amount $ 3,003 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (111)          
Fair Value, Ending Balance $ 2,801 [7],[9],[10],[11] $ (111) [14],[15],[16],[19]        
Investment, Identifier [Axis]: Pluralsight, LLC, Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.00% [7],[10],[11] 8.00% [14],[15],[16] 8.00% [7],[10],[11] 8.00% [7],[10],[11] 8.00% [14],[15],[16] 8.00% [14],[15],[16]
Investment, interest rate 13.45% [7],[8],[10],[11] 10.68% [14],[15],[16],[17] 13.45% [7],[8],[10],[11] 13.45% [7],[8],[10],[11] 10.68% [14],[15],[16],[17] 10.68% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 67,244 [7],[10],[11],[13] $ 48,689 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 47,155          
Fair Value, Ending Balance $ 64,406 [7],[10],[11] $ 47,155 [14],[15],[16]        
Investment, Identifier [Axis]: Profrac Holdings II, LLC, Industrial Machinery & Supplies & Components, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.25%   7.25% 7.25%    
Investment, interest rate [7],[8],[10],[11] 12.78%   12.78% 12.78%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 24,503          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 24,081          
Investment, Identifier [Axis]: Profrac Holdings II, LLC, Industrial Machinery & Supplies & Components, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.25%   7.25% 7.25%    
Investment, interest rate [7],[8],[10],[11] 12.78%   12.78% 12.78%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 2,819          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 2,771          
Investment, Identifier [Axis]: Profrac Holdings II, LLC, Industrial Machinery, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   8.50%     8.50% 8.50%
Investment, interest rate [14],[15],[16],[17]   10.01%     10.01% 10.01%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 23,275        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 22,810          
Fair Value, Ending Balance [14],[15],[16]   $ 22,810        
Investment, Identifier [Axis]: Project Boost Purchaser, LLC, Application Software, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   8.00%     8.00% 8.00%
Investment, interest rate [14],[15],[16],[17]   11.12%     11.12% 11.12%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 5,250        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 5,047          
Fair Value, Ending Balance [14],[15],[16]   $ 5,047        
Investment, Identifier [Axis]: Quantum Bidco Limited, Food Distributors, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.75% [7],[10],[11],[20] 6.00% [14],[15],[16],[22] 5.75% [7],[10],[11],[20] 5.75% [7],[10],[11],[20] 6.00% [14],[15],[16],[22] 6.00% [14],[15],[16],[22]
Investment, interest rate 11.21% [7],[8],[10],[11],[20] 8.39% [14],[15],[16],[17],[22] 11.21% [7],[8],[10],[11],[20] 11.21% [7],[8],[10],[11],[20] 8.39% [14],[15],[16],[17],[22] 8.39% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount | £       £ 4,626 [7],[10],[11],[13],[20]   £ 3,501 [14],[15],[16],[18],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] $ 3,367          
Fair Value, Ending Balance $ 5,166 [7],[10],[11],[20] $ 3,367 [14],[15],[16],[22]        
Investment, Identifier [Axis]: QuorumLabs, Inc., Application Software, Preferred Equity            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 64,887,669 [7],[10] 64,887,669 [14],[15] 64,887,669 [7],[10] 64,887,669 [7],[10] 64,887,669 [14],[15] 64,887,669 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 0          
Fair Value, Ending Balance 0 [7],[10] $ 0 [14],[15]        
Investment, Identifier [Axis]: RP Escrow Issuer LLC, Health Care Distributors, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17]   5.25%     5.25% 5.25%
Investment owned, balance, principal amount [15],[18]   $ 1,325        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15] 1,097          
Fair Value, Ending Balance [15]   $ 1,097        
Investment, Identifier [Axis]: Radiology Partners, Inc., Health Care Distributors, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   4.25%     4.25% 4.25%
Investment, interest rate [15],[16],[17]   7.33%     7.33% 7.33%
Investment owned, balance, principal amount [15],[16],[18]   $ 3,400        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 2,880          
Fair Value, Ending Balance [15],[16]   $ 2,880        
Investment, Identifier [Axis]: Radiology Partners, Inc., Health Care Distributors, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17]   9.25%     9.25% 9.25%
Investment owned, balance, principal amount [15],[18]   $ 4,755        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15] $ 3,109          
Fair Value, Ending Balance [15]   $ 3,109        
Investment, Identifier [Axis]: Relativity ODA LLC, Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.50% [7],[9],[10],[11] 6.50% [14],[15],[16],[19] 6.50% [7],[9],[10],[11] 6.50% [7],[9],[10],[11] 6.50% [14],[15],[16],[19] 6.50% [14],[15],[16],[19]
Investment owned, balance, principal amount $ 0 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (64)          
Fair Value, Ending Balance $ (47) [7],[9],[10],[11] $ (64) [14],[15],[16],[19]        
Investment, Identifier [Axis]: Relativity ODA LLC, Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.50% [7],[10],[11] 7.50% [14],[15],[16] 6.50% [7],[10],[11] 6.50% [7],[10],[11] 7.50% [14],[15],[16] 7.50% [14],[15],[16]
Investment, interest rate [7],[8],[10],[11] 11.92%   11.92% 11.92%    
Investment, interest rate, paid in kind [14],[15],[16]   10.59%     10.59% 10.59%
Investment owned, balance, principal amount $ 32,329 [7],[10],[11],[13] $ 24,692 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 24,101          
Fair Value, Ending Balance 31,779 [7],[10],[11] $ 24,101 [14],[15],[16]        
Investment, Identifier [Axis]: Renaissance Holding Corp., Diversified Banks, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   7.00%     7.00% 7.00%
Investment, interest rate [15],[16],[17]   10.12%     10.12% 10.12%
Investment owned, balance, principal amount [15],[16],[18]   $ 3,542        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 3,402          
Fair Value, Ending Balance [15],[16]   $ 3,402        
Investment, Identifier [Axis]: RumbleOn, Inc., Automotive Retail, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.25% [7],[10],[11],[20] 8.25% [14],[15],[16],[22] 8.25% [7],[10],[11],[20] 8.25% [7],[10],[11],[20] 8.25% [14],[15],[16],[22] 8.25% [14],[15],[16],[22]
Investment, interest rate 13.90% [7],[8],[10],[11],[20] 11.92% [14],[15],[16],[17],[22] 13.90% [7],[8],[10],[11],[20] 13.90% [7],[8],[10],[11],[20] 11.92% [14],[15],[16],[17],[22] 11.92% [14],[15],[16],[17],[22]
Investment, interest rate, paid in kind [7],[10],[11],[20] 0.50%   0.50% 0.50%    
Investment owned, balance, principal amount $ 36,707 [7],[10],[11],[13],[20] $ 37,656 [14],[15],[16],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] 36,187          
Fair Value, Ending Balance $ 34,505 [7],[10],[11],[20] $ 36,187 [14],[15],[16],[22]        
Investment, Identifier [Axis]: RumbleOn, Inc., Automotive Retail, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.25% [7],[10],[11],[20] 8.25% [14],[15],[16],[19],[22] 8.25% [7],[10],[11],[20] 8.25% [7],[10],[11],[20] 8.25% [14],[15],[16],[19],[22] 8.25% [14],[15],[16],[19],[22]
Investment, interest rate 13.90% [7],[8],[10],[11],[20] 11.92% [14],[15],[16],[17],[19],[22] 13.90% [7],[8],[10],[11],[20] 13.90% [7],[8],[10],[11],[20] 11.92% [14],[15],[16],[17],[19],[22] 11.92% [14],[15],[16],[17],[19],[22]
Investment, interest rate, paid in kind [7],[10],[11],[20] 0.50%   0.50% 0.50%    
Investment owned, balance, principal amount $ 13,504 [7],[10],[11],[13],[20] $ 11,393 [14],[15],[16],[18],[19],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19],[22] 10,760          
Fair Value, Ending Balance $ 12,694 [7],[10],[11],[20] $ 10,760 [14],[15],[16],[19],[22]        
Investment, Identifier [Axis]: RumbleOn, Inc., Automotive Retail, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 204,454 [7],[10],[20] 164,660 [14],[15],[22] 204,454 [7],[10],[20] 204,454 [7],[10],[20] 164,660 [14],[15],[22] 164,660 [14],[15],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] $ 74          
Fair Value, Ending Balance $ 756 [7],[10],[20] $ 74 [14],[15],[22]        
Investment, Identifier [Axis]: SCP Eye Care Services, LLC, Health Care Services, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10] 1,037   1,037 1,037    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10] $ 951          
Investment, Identifier [Axis]: SCP Eye Care Services, LLC, Health Care Services, Second Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 8.75%   8.75% 8.75%    
Investment, interest rate [7],[8],[10],[11] 14.18%   14.18% 14.18%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 8,010          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 7,778          
Investment, Identifier [Axis]: SCP Eye Care Services, LLC, Health Care Services, Second Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 8.75%   8.75% 8.75%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ (68)          
Investment, Identifier [Axis]: SIO2 Medical Products, Inc, Metal, Glass & Plastic Containers, First Lien Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate, paid in kind 12.00%   12.00% 12.00%    
Investment owned, balance, principal amount $ 15,874          
Net Realized Gain (Loss) 0          
Amount of Interest, Fees or Dividends Credited in Income 340          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 0          
Gross Additions 16,653          
Gross Reductions (779)          
Fair Value, Ending Balance $ 15,874 $ 0        
Investment owned, percent of net assets 1.00%   1.00% 1.00%    
Investment, Identifier [Axis]: SIO2 Medical Products, Inc. Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7] 1,184,630   1,184,630 1,184,630    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7] $ 36,226          
Investment, Identifier [Axis]: SIO2 Medical Products, Inc. Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7] 66,686   66,686 66,686    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7] $ 0          
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, interest rate, paid in kind [7] 12.00%   12.00% 12.00%    
Investment owned, balance, principal amount [7],[13] $ 15,874          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7] $ 15,874          
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, interest rate, paid in kind [7],[9] 12.00%   12.00% 12.00%    
Investment owned, balance, principal amount [7],[9],[13] $ 1,359          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9] 1,359          
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal & Glass Containers, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15]   415     415 415
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 681          
Fair Value, Ending Balance [14],[15]   $ 681        
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal, Glass & Plastic Containers, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 1,184,630   1,184,630 1,184,630    
Net Realized Gain (Loss) $ 0          
Amount of Interest, Fees or Dividends Credited in Income 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 0          
Gross Additions 40,093          
Gross Reductions (3,867)          
Fair Value, Ending Balance $ 36,226 0        
Investment owned, percent of net assets 2.40%   2.40% 2.40%    
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal, Glass & Plastic Containers, First Lien Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate, paid in kind 12.00%   12.00% 12.00%    
Investment owned, balance, principal amount $ 1,359          
Net Realized Gain (Loss) 0          
Amount of Interest, Fees or Dividends Credited in Income 14          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 0          
Gross Additions 1,359          
Gross Reductions 0          
Fair Value, Ending Balance $ 1,359 0        
Investment owned, percent of net assets 0.10%   0.10% 0.10%    
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal, Glass & Plastic Containers, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 66,686   66,686 66,686    
Net Realized Gain (Loss) $ 0          
Amount of Interest, Fees or Dividends Credited in Income 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 0          
Gross Additions 0          
Gross Reductions 0          
Fair Value, Ending Balance $ 0 $ 0        
Investment owned, percent of net assets 0.00%   0.00% 0.00%    
Investment, Identifier [Axis]: SM Wellness Holdings, Inc., Health Care Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 4.75%   4.75% 4.75%    
Investment, interest rate [7],[8],[10],[11] 10.38%   10.38% 10.38%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 4,452          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 4,184          
Investment, Identifier [Axis]: SM Wellness Holdings, Inc., Health Care Services, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.00% [7],[10],[11] 8.00% [14],[15],[16] 8.00% [7],[10],[11] 8.00% [7],[10],[11] 8.00% [14],[15],[16] 8.00% [14],[15],[16]
Investment, interest rate 13.63% [7],[8],[10],[11] 10.74% [14],[15],[16],[17] 13.63% [7],[8],[10],[11] 13.63% [7],[8],[10],[11] 10.74% [14],[15],[16],[17] 10.74% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 12,034 [7],[10],[11],[13] $ 9,109 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 8,289          
Fair Value, Ending Balance 9,928 [7],[10],[11] $ 8,289 [14],[15],[16]        
Investment, Identifier [Axis]: SPX Flow, Inc., Industrial Machinery, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   4.50%     4.50% 4.50%
Investment, interest rate [15],[16],[17]   7.63%     7.63% 7.63%
Investment owned, balance, principal amount [15],[16],[18]   $ 1,500        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 1,393          
Fair Value, Ending Balance [15],[16]   $ 1,393        
Investment, Identifier [Axis]: SVP-Singer Holdings Inc., Home Furnishings, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.75% [7],[10],[11] 6.75% [14],[15],[16] 6.75% [7],[10],[11] 6.75% [7],[10],[11] 6.75% [14],[15],[16] 6.75% [14],[15],[16]
Investment, interest rate 12.40% [7],[8],[10],[11] 10.42% [14],[15],[16],[17] 12.40% [7],[8],[10],[11] 12.40% [7],[8],[10],[11] 10.42% [14],[15],[16],[17] 10.42% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 25,527 [7],[10],[11],[13] $ 20,766 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 18,188          
Fair Value, Ending Balance 19,954 [7],[10],[11] $ 18,188 [14],[15],[16]        
Investment, Identifier [Axis]: Sabert Corporation, Metal & Glass Containers, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   4.50%     4.50% 4.50%
Investment, interest rate [15],[16],[17]   7.63%     7.63% 7.63%
Investment owned, balance, principal amount [15],[16],[18]   $ 1,691        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 1,623          
Fair Value, Ending Balance [15],[16]   $ 1,623        
Investment, Identifier [Axis]: Salus Workers' Compensation, LLC, Diversified Financial Services, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 10.00%   10.00% 10.00%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ (93)          
Investment, Identifier [Axis]: Salus Workers' Compensation, LLC, Diversified Financial Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 10.00%   10.00% 10.00%    
Investment, interest rate [7],[8],[10],[11] 15.24%   15.24% 15.24%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 25,558          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 24,791          
Investment, Identifier [Axis]: Salus Workers' Compensation, LLC, Diversified Financial Services, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10] 991,019   991,019 991,019    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10] $ 1,625          
Investment, Identifier [Axis]: Scilex Holding Co, Biotechnology, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [10],[20] 9,307   9,307 9,307    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[20] $ 13          
Investment, Identifier [Axis]: Senior Loan Fund JV I, LLC, Multi-Sector Holdings, Membership Interest            
Schedule of Investments [Line Items]            
Investment owned, ownership percentage 87.50% [9],[20],[28],[29],[32] 87.50% [1],[2],[19],[22],[30],[31],[33] 87.50% [9],[20],[28],[29],[32] 87.50% [9],[20],[28],[29],[32] 87.50% [1],[2],[19],[22],[30],[31],[33] 87.50% [1],[2],[19],[22],[30],[31],[33]
Net Realized Gain (Loss) $ 0 $ 0        
Amount of Interest, Fees or Dividends Credited in Income 4,200 2,901        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 20,715 [1],[2],[19],[22],[30],[31],[33] 37,651        
Gross Additions 8,163 0        
Gross Reductions 0 (16,936)        
Fair Value, Ending Balance $ 28,878 [9],[20],[28],[29],[32] $ 20,715 [1],[2],[19],[22],[30],[31],[33]        
Investment owned, percent of net assets 1.90% 1.70% 1.90% 1.90% 1.70% 1.70%
Investment, Identifier [Axis]: Senior Loan Fund JV I, LLC, Multi-Sector Holdings, Subordinated Debt            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [7],[9],[11],[20],[28] 7.00% [1],[2],[14],[16],[19],[22],[30] 7.00% [7],[9],[11],[20],[28] 7.00% [7],[9],[11],[20],[28] 7.00% [1],[2],[14],[16],[19],[22],[30] 7.00% [1],[2],[14],[16],[19],[22],[30]
Investment, interest rate 12.26% [7],[8],[9],[11],[20],[28] 8.80% [1],[2],[14],[16],[17],[19],[22],[30] 12.26% [7],[8],[9],[11],[20],[28] 12.26% [7],[8],[9],[11],[20],[28] 8.80% [1],[2],[14],[16],[17],[19],[22],[30] 8.80% [1],[2],[14],[16],[17],[19],[22],[30]
Investment owned, balance, principal amount $ 112,656 [7],[9],[11],[13],[20],[28] $ 96,250 [1],[2],[14],[16],[18],[19],[22],[30]        
Net Realized Gain (Loss) 0 0        
Amount of Interest, Fees or Dividends Credited in Income 12,726 8,001        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance 96,250 [1],[2],[14],[16],[19],[22],[30] 96,250        
Gross Additions 16,406 0        
Gross Reductions 0 0        
Fair Value, Ending Balance $ 112,656 [7],[9],[11],[20],[28] $ 96,250 [1],[2],[14],[16],[19],[22],[30]        
Investment owned, percent of net assets 7.40% 7.70% 7.40% 7.40% 7.70% 7.70%
Investment, Identifier [Axis]: Seres Therapeutics, Inc., Biotechnology, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 7.88%   7.88% 7.88%    
Investment, interest rate [7],[8],[10],[11],[20] 12.88%   12.88% 12.88%    
Investment owned, balance, principal amount [7],[10],[11],[13],[20] $ 7,191          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] $ 6,937          
Investment, Identifier [Axis]: Seres Therapeutics, Inc., Biotechnology, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 7.88%   7.88% 7.88%    
Investment, interest rate [7],[8],[10],[11],[20] 12.88%   12.88% 12.88%    
Investment owned, balance, principal amount [7],[10],[11],[13],[20] $ 2,697          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] $ 2,602          
Investment, Identifier [Axis]: Seres Therapeutics, Inc., Biotechnology, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11],[20] 7.88%   7.88% 7.88%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13],[20] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11],[20] $ 0          
Investment, Identifier [Axis]: Seres Therapeutics, Inc., Biotechnology, First Lien Term Loan 4            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11],[20] 7.88%   7.88% 7.88%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13],[20] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11],[20] $ 0          
Investment, Identifier [Axis]: Seres Therapeutics, Inc., Biotechnology, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10],[20] 58,210   58,210 58,210    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20] $ 87          
Investment, Identifier [Axis]: ShareThis, Inc., Application Software, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 345,452 [7],[10] 345,452 [14],[15] 345,452 [7],[10] 345,452 [7],[10] 345,452 [14],[15] 345,452 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 0          
Fair Value, Ending Balance 0 [7],[10] $ 0 [14],[15]        
Investment, Identifier [Axis]: SiO2 Medical Products, Inc., Metal & Glass Containers, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate [14],[15],[16],[17]   5.50%     5.50% 5.50%
Investment, interest rate, paid in kind [14],[15]   8.50%     8.50% 8.50%
Investment owned, balance, principal amount [14],[15],[18]   $ 46,121        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 45,295          
Fair Value, Ending Balance [14],[15]   $ 45,295        
Investment, Identifier [Axis]: SonicWall US Holdings Inc., Technology Distributors, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.50% [7],[10],[11] 7.50% [14],[15],[16] 7.50% [7],[10],[11] 7.50% [7],[10],[11] 7.50% [14],[15],[16] 7.50% [14],[15],[16]
Investment, interest rate 13.04% [7],[8],[10],[11] 10.48% [14],[15],[16],[17] 13.04% [7],[8],[10],[11] 13.04% [7],[8],[10],[11] 10.48% [14],[15],[16],[17] 10.48% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 821 [7],[10],[11],[13] $ 3,195 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 2,997          
Fair Value, Ending Balance $ 776 [7],[10],[11] $ 2,997 [14],[15],[16]        
Investment, Identifier [Axis]: Sorrento Therapeutics, Inc., Biotechnology, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 66,000 [10],[20] 50,000 [15],[22] 66,000 [10],[20] 66,000 [10],[20] 50,000 [15],[22] 50,000 [15],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] $ 79          
Fair Value, Ending Balance $ 6 [10],[20] $ 79 [15],[22]        
Investment, Identifier [Axis]: Spanx, LLC, Apparel Retail, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.00% [7],[9],[10],[11] 5.25% [14],[15],[16],[19] 5.00% [7],[9],[10],[11] 5.00% [7],[9],[10],[11] 5.25% [14],[15],[16],[19] 5.25% [14],[15],[16],[19]
Investment, interest rate 10.42% [7],[8],[9],[10],[11] 8.03% [14],[15],[16],[17],[19] 10.42% [7],[8],[9],[10],[11] 10.42% [7],[8],[9],[10],[11] 8.03% [14],[15],[16],[17],[19] 8.03% [14],[15],[16],[17],[19]
Investment owned, balance, principal amount $ 618 [7],[9],[10],[11],[13] $ 866 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 796          
Fair Value, Ending Balance $ 577 [7],[9],[10],[11] $ 796 [14],[15],[16],[19]        
Investment, Identifier [Axis]: Spanx, LLC, Apparel Retail, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 5.25% [7],[10],[11] 5.25% [14],[15],[16] 5.25% [7],[10],[11] 5.25% [7],[10],[11] 5.25% [14],[15],[16] 5.25% [14],[15],[16]
Investment, interest rate 10.67% [7],[8],[10],[11] 8.30% [14],[15],[16],[17] 10.67% [7],[8],[10],[11] 10.67% [7],[8],[10],[11] 8.30% [14],[15],[16],[17] 8.30% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 4,488 [7],[10],[11],[13] $ 4,534 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 4,427          
Fair Value, Ending Balance $ 4,425 [7],[10],[11] $ 4,427 [14],[15],[16]        
Investment, Identifier [Axis]: SumUp Holdings Luxembourg S.À.R.L., Diversified Financial Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 8.50%   8.50% 8.50%    
Investment, interest rate [7],[8],[10],[11],[20] 12.32%   12.32% 12.32%    
Investment owned, balance, principal amount | € [7],[10],[11],[13],[20]     € 23,731      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] $ 24,937          
Investment, Identifier [Axis]: SumUp Holdings Luxembourg S.À.R.L., Other Diversified Financial Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[22]   8.50%     8.50% 8.50%
Investment, interest rate [14],[15],[16],[17],[22]   10.00%     10.00% 10.00%
Investment owned, balance, principal amount | £ [14],[15],[16],[18],[22]           £ 16,911
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] 16,360          
Fair Value, Ending Balance [14],[15],[16],[22]   $ 16,360        
Investment, Identifier [Axis]: Sunland Asphalt & Construction, LLC, Construction & Engineering, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   6.00%     6.00% 6.00%
Investment, interest rate [14],[15],[16],[17]   8.88%     8.88% 8.88%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 42,618        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 41,723          
Fair Value, Ending Balance [14],[15],[16]   $ 41,723        
Investment, Identifier [Axis]: Superior Industries International, Inc., Auto Parts & Equipment, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 8.00%   8.00% 8.00%    
Investment, interest rate [7],[8],[10],[11] 13.32%   13.32% 13.32%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 49,520          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 49,148          
Investment, Identifier [Axis]: Supermoose Borrower, LLC, Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   3.75%     3.75% 3.75%
Investment, interest rate [15],[16],[17]   7.42%     7.42% 7.42%
Investment owned, balance, principal amount [15],[16],[18]   $ 3,466        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 3,056          
Fair Value, Ending Balance [15],[16]   $ 3,056        
Investment, Identifier [Axis]: Supreme Fitness Group NY Holdings, LLC, Leisure Facilities, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[34] 7.00%   7.00% 7.00%    
Investment, interest rate [7],[8],[10],[11],[34] 12.44%   12.44% 12.44%    
Investment owned, balance, principal amount [7],[10],[11],[13],[34] $ 1,552          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[34] $ 1,478          
Investment, Identifier [Axis]: Supreme Fitness Group NY Holdings, LLC, Leisure Facilities, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[34] 7.00%   7.00% 7.00%    
Investment, interest rate [7],[8],[10],[11],[34] 12.51%   12.51% 12.51%    
Investment owned, balance, principal amount [7],[10],[11],[13],[34] $ 32,104          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[34] $ 30,579          
Investment, Identifier [Axis]: Supreme Fitness Group NY Holdings, LLC, Leisure Facilities, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[34] 7.00%   7.00% 7.00%    
Investment, interest rate [7],[8],[10],[11],[34] 12.51%   12.51% 12.51%    
Investment owned, balance, principal amount [7],[10],[11],[13],[34] $ 2,749          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[34] $ 2,618          
Investment, Identifier [Axis]: Supreme Fitness Group NY Holdings, LLC, Leisure Facilities, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11],[34] 7.00%   7.00% 7.00%    
Investment, interest rate [7],[8],[9],[10],[11],[34] 12.51%   12.51% 12.51%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13],[34] $ 1,099          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11],[34] 943          
Investment, Identifier [Axis]: Swordfish Merger Sub LLC, Auto Parts & Equipment, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   6.75%     6.75% 6.75%
Investment, interest rate [14],[15],[16],[17]   9.81%     9.81% 9.81%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 12,500        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 11,469          
Fair Value, Ending Balance [14],[15],[16]   $ 11,469        
Investment, Identifier [Axis]: TGNR HoldCo LLC, Integrated Oil & Gas, Subordinated Debt            
Schedule of Investments [Line Items]            
Investment, interest rate 11.50% [8],[10],[11],[12],[20] 11.50% [14],[15],[16],[17],[22] 11.50% [8],[10],[11],[12],[20] 11.50% [8],[10],[11],[12],[20] 11.50% [14],[15],[16],[17],[22] 11.50% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount $ 4,984 [10],[12],[13],[20] $ 4,984 [14],[15],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[22] 4,872          
Fair Value, Ending Balance $ 4,785 [10],[12],[20] $ 4,872 [14],[15],[22]        
Investment, Identifier [Axis]: THL Zinc Ventures Ltd, Diversified Metals & Mining, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, interest rate [7],[8],[10],[11],[20] 13.00%   13.00% 13.00%    
Investment owned, balance, principal amount [7],[10],[13],[20] $ 50,419          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[20] 49,869          
Investment, Identifier [Axis]: TIBCO Software Inc., Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [15],[16]   4.50%     4.50% 4.50%
Investment, interest rate [15],[16],[17]   8.15%     8.15% 8.15%
Investment owned, balance, principal amount [15],[16],[18]   $ 12,032        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] $ 10,827          
Fair Value, Ending Balance [15],[16]   $ 10,827        
Investment, Identifier [Axis]: Tacala, LLC, Restaurants, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 8.00% [10],[11] 7.50% [15],[16] 8.00% [10],[11] 8.00% [10],[11] 7.50% [15],[16] 7.50% [15],[16]
Investment, interest rate 13.43% [8],[10],[11] 10.62% [15],[16],[17] 13.43% [8],[10],[11] 13.43% [8],[10],[11] 10.62% [15],[16],[17] 10.62% [15],[16],[17]
Investment owned, balance, principal amount $ 12,843 [10],[11],[13] $ 9,448 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 8,692          
Fair Value, Ending Balance $ 12,464 [10],[11] $ 8,692 [15],[16]        
Investment, Identifier [Axis]: Tahoe Bidco B.V., Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.00% [7],[9],[10],[11],[20] 6.00% [14],[15],[16],[19],[22] 6.00% [7],[9],[10],[11],[20] 6.00% [7],[9],[10],[11],[20] 6.00% [14],[15],[16],[19],[22] 6.00% [14],[15],[16],[19],[22]
Investment owned, balance, principal amount $ 0 [7],[9],[10],[11],[13],[20] $ 0 [14],[15],[16],[18],[19],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19],[22] (28)          
Fair Value, Ending Balance $ (22) [7],[9],[10],[11],[20] $ (28) [14],[15],[16],[19],[22]        
Investment, Identifier [Axis]: Tahoe Bidco B.V., Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.00% [7],[10],[11],[20] 6.00% [14],[15],[16],[22] 6.00% [7],[10],[11],[20] 6.00% [7],[10],[11],[20] 6.00% [14],[15],[16],[22] 6.00% [14],[15],[16],[22]
Investment, interest rate 11.42% [7],[8],[10],[11],[20] 8.68% [14],[15],[16],[17],[22] 11.42% [7],[8],[10],[11],[20] 11.42% [7],[8],[10],[11],[20] 8.68% [14],[15],[16],[17],[22] 8.68% [14],[15],[16],[17],[22]
Investment owned, balance, principal amount $ 28,826 [7],[10],[11],[13],[20] $ 23,215 [14],[15],[16],[18],[22]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] 22,843          
Fair Value, Ending Balance 28,537 [7],[10],[11],[20] $ 22,843 [14],[15],[16],[22]        
Investment, Identifier [Axis]: Tecta America Corp., Construction & Engineering, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   8.50%     8.50% 8.50%
Investment, interest rate [14],[15],[16],[17]   11.62%     11.62% 11.62%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 5,203        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 5,034          
Fair Value, Ending Balance [14],[15],[16]   $ 5,034        
Investment, Identifier [Axis]: Telestream Holdings Corporation, Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 9.75% [7],[9],[10],[11] 9.25% [14],[15],[16],[19] 9.75% [7],[9],[10],[11] 9.75% [7],[9],[10],[11] 9.25% [14],[15],[16],[19] 9.25% [14],[15],[16],[19]
Investment, interest rate 15.17% [7],[8],[9],[10],[11] 12.20% [14],[15],[16],[17],[19] 15.17% [7],[8],[9],[10],[11] 15.17% [7],[8],[9],[10],[11] 12.20% [14],[15],[16],[17],[19] 12.20% [14],[15],[16],[17],[19]
Investment owned, balance, principal amount $ 1,861 [7],[9],[10],[11],[13] $ 1,231 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 1,187          
Fair Value, Ending Balance $ 1,802 [7],[9],[10],[11] $ 1,187 [14],[15],[16],[19]        
Investment, Identifier [Axis]: Telestream Holdings Corporation, Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 9.75% [7],[10],[11] 9.25% [14],[15],[16] 9.75% [7],[10],[11] 9.75% [7],[10],[11] 9.25% [14],[15],[16] 9.25% [14],[15],[16]
Investment, interest rate 15.26% [7],[8],[10],[11] 12.11% [14],[15],[16],[17] 15.26% [7],[8],[10],[11] 15.26% [7],[8],[10],[11] 12.11% [14],[15],[16],[17] 12.11% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 23,423 [7],[10],[11],[13] $ 18,323 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 17,865          
Fair Value, Ending Balance $ 22,814 [7],[10],[11] $ 17,865 [14],[15],[16]        
Investment, Identifier [Axis]: Ten-X LLC, Interactive Media & Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 6.00%   6.00% 6.00%    
Investment, interest rate [7],[8],[10],[11] 11.32%   11.32% 11.32%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 19,947          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 19,199          
Investment, Identifier [Axis]: TerSera Therapeutics LLC, Pharmaceuticals, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15]   668,879     668,879 668,879
Investment owned, balance, principal amount [14],[15],[18]          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] 4,077          
Fair Value, Ending Balance [14],[15]   $ 4,077        
Investment, Identifier [Axis]: TerSera Therapeutics LLC, Pharmaceuticals, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   9.50%     9.50% 9.50%
Investment, interest rate [14],[15],[16],[17]   13.17%     13.17% 13.17%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 29,663        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 29,031          
Fair Value, Ending Balance [14],[15],[16]   $ 29,031        
Investment, Identifier [Axis]: The Avery, Real Estate Operating Companies, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.30% [7],[10],[11],[23] 7.30% [14],[15],[16] 7.30% [7],[10],[11],[23] 7.30% [7],[10],[11],[23] 7.30% [14],[15],[16] 7.30% [14],[15],[16]
Investment, interest rate [14],[15],[16],[17]   10.44%     10.44% 10.44%
Investment owned, balance, principal amount $ 19,163 [7],[10],[11],[13],[23] $ 15,674 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 15,682          
Fair Value, Ending Balance $ 18,340 [7],[10],[11],[23] $ 15,682 [14],[15],[16]        
Investment, Identifier [Axis]: The Avery, Real Estate Operating Companies, Subordinated Debt Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 12.50% [7],[10],[11],[23] 12.50% [14],[15],[16] 12.50% [7],[10],[11],[23] 12.50% [7],[10],[11],[23] 12.50% [14],[15],[16] 12.50% [14],[15],[16]
Investment, interest rate [14],[15],[16],[17]   16.17%     16.17% 16.17%
Investment owned, balance, principal amount $ 4,641 [7],[10],[11],[13],[23] $ 3,789 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 3,800          
Fair Value, Ending Balance $ 4,170 [7],[10],[11],[23] $ 3,800 [14],[15],[16]        
Investment, Identifier [Axis]: Thrasio, LLC, Broadline Retail, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.00%   7.00% 7.00%    
Investment, interest rate, paid in kind 12.65%   12.65% 12.65%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 46,832          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 37,231          
Investment, Identifier [Axis]: Thrasio, LLC, Broadline Retail, Preferred Equity 1            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10] 10,616   10,616 10,616    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10] $ 0          
Investment, Identifier [Axis]: Thrasio, LLC, Broadline Retail, Preferred Equity 2            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10] 358,299   358,299 358,299    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10] $ 0          
Investment, Identifier [Axis]: Thrasio, LLC, Broadline Retail, Preferred Equity 3            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10] 60,862   60,862 60,862    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10] $ 108          
Investment, Identifier [Axis]: Thrasio, LLC, Broadline Retail, Preferred Equity 4            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10] 32,447   32,447 32,447    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10] $ 31,701          
Investment, Identifier [Axis]: Thrasio, LLC, Internet & Direct Marketing Retail, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   7.00%     7.00% 7.00%
Investment, interest rate [14],[15],[16],[17]   11.17%     11.17% 11.17%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 37,494        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 35,807          
Fair Value, Ending Balance [14],[15],[16]   $ 35,807        
Investment, Identifier [Axis]: Thrasio, LLC, Internet & Direct Marketing Retail, Preferred Equity 1            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15]   8,434     8,434 8,434
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] 69          
Fair Value, Ending Balance [14],[15]   $ 69        
Investment, Identifier [Axis]: Thrasio, LLC, Internet & Direct Marketing Retail, Preferred Equity 2            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15]   284,650     284,650 284,650
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] 2,320          
Fair Value, Ending Balance [14],[15]   $ 2,320        
Investment, Identifier [Axis]: Thrasio, LLC, Internet & Direct Marketing Retail, Preferred Equity 3            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15]   48,352     48,352 48,352
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] 979          
Fair Value, Ending Balance [14],[15]   $ 979        
Investment, Identifier [Axis]: Thrasio, LLC, Internet & Direct Marketing Retail, Preferred Equity 4            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15],[19]   23,201     23,201 23,201
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[19] $ 26,487          
Fair Value, Ending Balance [14],[15],[19]   $ 26,487        
Investment, Identifier [Axis]: Touchstone Acquisition, Inc., Health Care Supplies, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.00% [7],[10],[11] 6.00% [14],[15],[16] 6.00% [7],[10],[11] 6.00% [7],[10],[11] 6.00% [14],[15],[16] 6.00% [14],[15],[16]
Investment, interest rate 11.42% [7],[8],[10],[11] 9.12% [14],[15],[16],[17] 11.42% [7],[8],[10],[11] 11.42% [7],[8],[10],[11] 9.12% [14],[15],[16],[17] 9.12% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 11,671 [7],[10],[11],[13] $ 6,016 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 5,895          
Fair Value, Ending Balance $ 11,363 [7],[10],[11] $ 5,895 [14],[15],[16]        
Investment, Identifier [Axis]: Trinitas CLO XV DAC, Multi-Sector Holdings, CLO Notes            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [10],[11],[20] 7.71%   7.71% 7.71%    
Investment, interest rate [8],[10],[11],[20] 13.06%   13.06% 13.06%    
Investment owned, balance, principal amount [10],[11],[13],[20] $ 1,000          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[11],[20] $ 917          
Investment, Identifier [Axis]: Uniti Group LP, Other Specialized REITs, Fixed Rate Bond 1            
Schedule of Investments [Line Items]            
Investment, interest rate [8],[10],[11],[20] 6.50%   6.50% 6.50%    
Investment owned, balance, principal amount [10],[13],[20] $ 4,500          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[20] $ 2,953          
Investment, Identifier [Axis]: Uniti Group LP, Other Specialized REITs, Fixed Rate Bond 2            
Schedule of Investments [Line Items]            
Investment, interest rate [8],[10],[11],[20] 4.75%   4.75% 4.75%    
Investment owned, balance, principal amount [10],[13],[20] $ 300          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [10],[20] 245          
Investment, Identifier [Axis]: Uniti Group LP, Specialized REITs, Fixed Rate Bond 1            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17],[22]   6.50%     6.50% 6.50%
Investment owned, balance, principal amount [15],[18],[22]   $ 4,500        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] 3,026          
Fair Value, Ending Balance [15],[22]   $ 3,026        
Investment, Identifier [Axis]: Uniti Group LP, Specialized REITs, Fixed Rate Bond 2            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17],[22]   4.75%     4.75% 4.75%
Investment owned, balance, principal amount [15],[18],[22]   $ 300        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[22] $ 238          
Fair Value, Ending Balance [15],[22]   $ 238        
Investment, Identifier [Axis]: Virgin Pulse, Inc., Application Software, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 7.25%   7.25% 7.25%    
Investment, interest rate [7],[8],[10],[11] 12.68%   12.68% 12.68%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 1,140          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 1,139          
Investment, Identifier [Axis]: WP CPP Holdings, LLC, Aerospace & Defense, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 3.75% [10],[11] 3.75% [15],[16] 3.75% [10],[11] 3.75% [10],[11] 3.75% [15],[16] 3.75% [15],[16]
Investment, interest rate 9.27% [8],[10],[11] 6.56% [15],[16],[17] 9.27% [8],[10],[11] 9.27% [8],[10],[11] 6.56% [15],[16],[17] 6.56% [15],[16],[17]
Investment owned, balance, principal amount $ 11,792 [10],[11],[13] $ 7,564 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 6,795          
Fair Value, Ending Balance 11,127 [10],[11] $ 6,795 [15],[16]        
Investment, Identifier [Axis]: WP CPP Holdings, LLC, Aerospace & Defense, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   7.75%     7.75% 7.75%
Investment, interest rate [14],[15],[16],[17]   10.56%     10.56% 10.56%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 6,000        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 5,070          
Fair Value, Ending Balance [14],[15],[16]   $ 5,070        
Investment, Identifier [Axis]: WPEngine, Inc., Application Software, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   6.00%     6.00% 6.00%
Investment, interest rate [14],[15],[16],[17]   10.19%     10.19% 10.19%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 40,536        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 40,131          
Fair Value, Ending Balance [14],[15],[16]   $ 40,131        
Investment, Identifier [Axis]: WWEX Uni Topco Holdings, LLC, Air Freight & Logistics, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.00% [7],[10],[11] 7.00% [14],[15],[16] 7.00% [7],[10],[11] 7.00% [7],[10],[11] 7.00% [14],[15],[16] 7.00% [14],[15],[16]
Investment, interest rate 12.65% [7],[8],[10],[11] 10.67% [14],[15],[16],[17] 12.65% [7],[8],[10],[11] 12.65% [7],[8],[10],[11] 10.67% [14],[15],[16],[17] 10.67% [14],[15],[16],[17]
Investment owned, balance, principal amount $ 5,000 [7],[10],[11],[13] $ 5,000 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 4,538          
Fair Value, Ending Balance 4,263 [7],[10],[11] $ 4,538 [14],[15],[16]        
Investment, Identifier [Axis]: Win Brands Group LLC, Housewares & Specialties, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   15.00%     15.00% 15.00%
Investment, interest rate [14],[15],[16],[17]   19.64%     19.64% 19.64%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 2,316        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 2,264          
Fair Value, Ending Balance [14],[15],[16]   $ 2,264        
Investment, Identifier [Axis]: Win Brands Group LLC, Housewares & Specialties, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 15.00%   15.00% 15.00%    
Investment, interest rate [7],[8],[10],[11] 21.68%   21.68% 21.68%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 1,565          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 1,464          
Investment, Identifier [Axis]: Win Brands Group LLC, Housewares & Specialties, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 15.00%   15.00% 15.00%    
Investment, interest rate [7],[8],[10],[11] 21.68%   21.68% 21.68%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 1,323          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 1,237          
Investment, Identifier [Axis]: Win Brands Group LLC, Housewares & Specialties, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 4,871 [7],[10] 3,621 [14],[15] 4,871 [7],[10] 4,871 [7],[10] 3,621 [14],[15] 3,621 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 192          
Fair Value, Ending Balance $ 107 [7],[10] $ 192 [14],[15]        
Investment, Identifier [Axis]: Windstream Services II, LLC, Integrated Telecommunication Services, Common Stock            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 127,452 [7],[10] 18,032 [14],[15] 127,452 [7],[10] 127,452 [7],[10] 18,032 [14],[15] 18,032 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 296          
Fair Value, Ending Balance $ 1,319 [7],[10] $ 296 [14],[15]        
Investment, Identifier [Axis]: Windstream Services II, LLC, Integrated Telecommunication Services, First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.25% [10],[11] 6.25% [15],[16] 6.25% [10],[11] 6.25% [10],[11] 6.25% [15],[16] 6.25% [15],[16]
Investment, interest rate 11.67% [8],[10],[11] 9.37% [15],[16],[17] 11.67% [8],[10],[11] 11.67% [8],[10],[11] 9.37% [15],[16],[17] 9.37% [15],[16],[17]
Investment owned, balance, principal amount $ 8,983 [10],[11],[13] $ 25,499 [15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15],[16] 23,204          
Fair Value, Ending Balance 8,678 [10],[11] $ 23,204 [15],[16]        
Investment, Identifier [Axis]: Windstream Services II, LLC, Integrated Telecommunication Services, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [14],[15]   109,420     109,420 109,420
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] 1,799          
Fair Value, Ending Balance [14],[15]   $ 1,799        
Investment, Identifier [Axis]: Zayo Group Holdings, Inc., Alternative Carriers, Fixed Rate Bond            
Schedule of Investments [Line Items]            
Investment, interest rate [15],[16],[17]   4.00%     4.00% 4.00%
Investment owned, balance, principal amount [15],[18]   $ 250        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [15] 201          
Fair Value, Ending Balance [15]   $ 201        
Investment, Identifier [Axis]: Zep Inc., Specialty Chemicals, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16]   8.25%     8.25% 8.25%
Investment, interest rate [14],[15],[16],[17]   11.92%     11.92% 11.92%
Investment owned, balance, principal amount [14],[15],[16],[18]   $ 19,578        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] $ 16,152          
Fair Value, Ending Balance [14],[15],[16]   $ 16,152        
Investment, Identifier [Axis]: Zep Inc., Specialty Chemicals,First Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 4.00%   4.00% 4.00%    
Investment, interest rate [7],[8],[10],[11] 9.32%   9.32% 9.32%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 19,578          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] 19,489          
Investment, Identifier [Axis]: Zephyr Bidco Limited, Specialized Finance, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [14],[15],[16],[22]   7.50%     7.50% 7.50%
Investment, interest rate [14],[15],[16],[17],[22]   9.72%     9.72% 9.72%
Investment owned, balance, principal amount | £ [14],[15],[16],[18],[22]           £ 18,000
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[22] $ 16,552          
Fair Value, Ending Balance [14],[15],[16],[22]   $ 16,552        
Investment, Identifier [Axis]: Zephyr Bidco Limited,Specialized Finance, Second Lien Term Loan            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11],[20] 7.50%   7.50% 7.50%    
Investment, interest rate [7],[8],[10],[11],[20] 12.72%   12.72% 12.72%    
Investment owned, balance, principal amount | £ [7],[10],[11],[13],[20]       £ 20,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11],[20] $ 22,914          
Investment, Identifier [Axis]: athenahealth Group Inc., Health Care Technology, Preferred Equity            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares 21,523 [7],[10] 18,635 [14],[15] 21,523 [7],[10] 21,523 [7],[10] 18,635 [14],[15] 18,635 [14],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15] $ 16,575          
Fair Value, Ending Balance $ 20,074 [7],[10] $ 16,575 [14],[15]        
Investment, Identifier [Axis]: iCIMs, Inc., Application Software, First Lien Revolver            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 6.75% [7],[9],[10],[11] 6.75% [14],[15],[16],[19] 6.75% [7],[9],[10],[11] 6.75% [7],[9],[10],[11] 6.75% [14],[15],[16],[19] 6.75% [14],[15],[16],[19]
Investment, interest rate [7],[8],[9],[10],[11] 12.14%   12.14% 12.14%    
Investment owned, balance, principal amount $ 377 [7],[9],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] (32)          
Fair Value, Ending Balance $ 296 [7],[9],[10],[11] $ (32) [14],[15],[16],[19]        
Investment, Identifier [Axis]: iCIMs, Inc., Application Software, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.25% [7],[10],[11] 6.75% [14],[15],[16] 7.25% [7],[10],[11] 7.25% [7],[10],[11] 6.75% [14],[15],[16] 6.75% [14],[15],[16]
Investment, interest rate 12.63% [7],[8],[10],[11] 9.49% [14],[15],[16],[17] 12.63% [7],[8],[10],[11] 12.63% [7],[8],[10],[11] 9.49% [14],[15],[16],[17] 9.49% [14],[15],[16],[17]
Investment, interest rate, paid in kind [7],[10]      
Investment owned, balance, principal amount $ 24,427 [7],[10],[11],[13] $ 19,203 [14],[15],[16],[18]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16] 18,867          
Fair Value, Ending Balance $ 23,548 [7],[10],[11] $ 18,867 [14],[15],[16]        
Investment, Identifier [Axis]: iCIMs, Inc., Application Software, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate 7.25% [7],[10],[11] 6.75% [14],[15],[16],[19] 7.25% [7],[10],[11] 7.25% [7],[10],[11] 6.75% [14],[15],[16],[19] 6.75% [14],[15],[16],[19]
Investment, interest rate [7],[8],[10],[11] 12.63%   12.63% 12.63%    
Investment owned, balance, principal amount $ 3,636 [7],[10],[11],[13] $ 0 [14],[15],[16],[18],[19]        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Beginning Balance [14],[15],[16],[19] 0          
Fair Value, Ending Balance $ 3,574 [7],[10],[11] $ 0 [14],[15],[16],[19]        
Investment, Identifier [Axis]: iCIMs, Inc., Application Software, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 7.25%   7.25% 7.25%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ 0          
Investment, Identifier [Axis]: scPharmaceuticals Inc., Pharmaceuticals, First Lien Term Loan 1            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[10],[11] 8.75%   8.75% 8.75%    
Investment, interest rate [7],[8],[10],[11] 11.75%   11.75% 11.75%    
Investment owned, balance, principal amount [7],[10],[11],[13] $ 5,212          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10],[11] $ 4,990          
Investment, Identifier [Axis]: scPharmaceuticals Inc., Pharmaceuticals, First Lien Term Loan 2            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 8.75%   8.75% 8.75%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ 0          
Investment, Identifier [Axis]: scPharmaceuticals Inc., Pharmaceuticals, First Lien Term Loan 3            
Schedule of Investments [Line Items]            
Investment, basis spread, variable rate [7],[9],[10],[11] 8.75%   8.75% 8.75%    
Investment owned, balance, principal amount [7],[9],[10],[11],[13] $ 0          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[9],[10],[11] $ 0          
Investment, Identifier [Axis]: scPharmaceuticals Inc., Pharmaceuticals, Warrants            
Schedule of Investments [Line Items]            
Investment owned, balance (in shares) | shares [7],[10] 53,700   53,700 53,700    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]            
Fair Value, Ending Balance [7],[10] $ 258          
[1] As defined in the Investment Company Act, the Company is deemed to be both an "Affiliated Person" of and to "Control" these portfolio companies as the Company owns more than 25% of the portfolio company's outstanding voting securities or has the power to exercise control over management or policies of such portfolio company (including through a management agreement). See Schedule 12-14 in the accompanying notes to the Consolidated Financial Statements for transactions during the year ended September 30, 2022 in which the issuer was both an Affiliated Person and a portfolio company that the Company is deemed to control.
[2] Control Investments generally are defined by the Investment Company Act as investments in companies in which the Company owns more than 25% of the voting securities or maintains greater than 50% of the board representation.
[3] As defined in the Investment Company Act, the Company is deemed to be both an "Affiliated Person" of and to "Control" these portfolio companies as the Company owns more than 25% of the portfolio company's outstanding voting securities or has the power to exercise control over management or policies of such portfolio company (including through a management agreement). See Schedule 12-14 in the accompanying notes to the Consolidated Financial Statements for transactions during the year ended September 30, 2023 in which the issuer was both an Affiliated Person and a portfolio company that the Company is deemed to control.
[4] Control Investments generally are defined by the Investment Company Act of 1940, as amended (the "Investment Company Act"), as investments in companies in which the Company owns more than 25% of the voting securities or maintains greater than 50% of the board representation.
[5] Affiliate Investments generally are defined by the Investment Company Act as investments in companies in which the Company owns between 5% and 25% of the voting securities.
[6] Affiliate Investments generally are defined by the Investment Company Act as investments in companies in which the Company owns between 5% and 25% of the voting securities.
[7] As of September 30, 2023, these investments were categorized as Level 3 within the fair value hierarchy established by Financial Accounting Standards Board ("FASB") guidance under Accounting Standards Codification ("ASC") Topic 820, Fair Value Measurements and Disclosures ("ASC 820").
[8] Interest rates may be adjusted from period to period on certain term loans and revolvers. These rate adjustments may be either temporary in nature due to tier pricing arrangements or financial or payment covenant violations in the original credit agreements or permanent in nature per loan amendment or waiver documents.
[9] Investment had undrawn commitments. Unamortized fees are classified as unearned income which reduces cost basis, which may result in a negative cost basis. A negative fair value may result from the unfunded commitment being valued below par.
[10] Non-Control/Non-Affiliate Investments are investments that are neither Control Investments nor Affiliate Investments.
[11] The interest rate on the principal balance outstanding for most of the floating rate loans is indexed to the secured overnight financing rate ("SOFR"), the London Interbank Offered Rate ("LIBOR" or "L"), the sterling overnight index average ("SONIA") and/or an alternate base rate (e.g., prime rate), which typically resets semi-annually, quarterly, or monthly at the borrower's option. The borrower may also elect to have multiple interest reset periods for each loan. For each of these loans, the Company has provided the applicable margin over the reference rate based on each respective credit agreement and the cash interest rate as of period end. All LIBOR and SOFR shown above is in U.S. dollars unless otherwise noted. As of September 30, 2023, the reference rates for the Company's variable rate loans were the 30-day SOFR at 5.32%, the 90-day SOFR at 5.39%, the 180-day SOFR at 5.47%, the 30-day LIBOR at 5.43%, the 90-day LIBOR at 5.65%, the 180-day LIBOR at 5.90%, the PRIME at 8.50%, the SONIA at 5.19%, the 30-day EURIBOR at 3.42%, the 90-day EURIBOR at 3.82% and the 180-day EURIBOR at 3.95%. Most loans include an interest floor, which generally ranges from 0% to 2.75%. SOFR and SONIA based contracts may include a credit spread adjustment that is charged in addition to the base rate and the stated spread.
[12] This investment represents a participation interest in the underlying securities shown.
[13] Principal includes accumulated payment in kind ("PIK") interest and is net of repayments, if any. “£” signifies the investment is denominated in British Pounds. "€" signifies the investment is denominated in Euros. All other investments are denominated in U.S. dollars.
[14] As of September 30, 2022, these investments were categorized as Level 3 within the fair value hierarchy established by FASB guidance under ASC 820.
[15] Non-Control/Non-Affiliate Investments are investments that are neither Control Investments nor Affiliate Investments.
[16] The interest rate on the principal balance outstanding for most of the floating rate loans is indexed to LIBOR, SOFR, SONIA and/or an alternate base rate (e.g., prime rate), which typically resets semi-annually, quarterly, or monthly at the borrower's option. The borrower may also elect to have multiple interest reset periods for each loan. For each of these loans, the Company has provided the applicable margin over the reference rate based on each respective credit agreement and the cash interest rate as of period end. All LIBOR shown above is in U.S. dollars unless otherwise noted. As of September 30, 2022, the reference rates for the Company's variable rate loans were the 30-day LIBOR at 3.12%, the 90-day LIBOR at 3.67%, the 180-day LIBOR at 4.17%, the 360-day LIBOR at 4.78%, the PRIME at 6.25%, the 30-day SOFR at 3.03%, the 90-day SOFR at 3.55%, the SONIA at 1.69%, the 30-day EURIBOR at 0.69%, the 90-day EURIBOR at 0.99% and the 180-day EURIBOR at 0.38%. Most loans include an interest floor, which generally ranges from 0% to 1%. SOFR and SONIA based contracts may include a credit spread adjustment that is charged in addition to the base rate and the stated spread.
[17] Interest rates may be adjusted from period to period on certain term loans and revolvers. These rate adjustments may be either temporary in nature due to tier pricing arrangements or financial or payment covenant violations in the original credit agreements or permanent in nature per loan amendment or waiver documents.
[18] Principal includes accumulated PIK interest and is net of repayments, if any. “£” signifies the investment is denominated in British Pounds. "€" signifies the investment is denominated in Euros. All other investments are denominated in U.S. dollars.
[19] Investment had undrawn commitments. Unamortized fees are classified as unearned income which reduces cost basis, which may result in a negative cost basis. A negative fair value may result from the unfunded commitment being valued below par.
[20] Investment is not a "qualifying asset" as defined under Section 55(a) of the Investment Company Act. Under the Investment Company Act, the Company may not acquire any non-qualifying asset unless, at the time the acquisition is made, qualifying assets represent at least 70% of the Company's total assets. As of September 30, 2023, qualifying assets represented 73.6% of the Company's total assets and non-qualifying assets represented 26.4% of the Company's total assets.
[21] This investment represents a revenue interest financing term loan in which the Company receives periodic interest payments based on a percentage of revenues earned at the respective portfolio company over the life of the loan.
[22] Investment is not a "qualifying asset" as defined under Section 55(a) of the Investment Company Act. Under the Investment Company Act, the Company may not acquire any non-qualifying asset unless, at the time the acquisition is made, qualifying assets represent at least 70% of the Company's total assets. As of September 30, 2022, qualifying assets represented 75.7% of the Company's total assets and non-qualifying assets represented 24.3% of the Company's total assets.
[23] This investment was on non-accrual status as of September 30, 2023.
[24] This investment represents Seller Earn Out Shares in Alvotech SA. One half of the Seller Earn Out Shares will vest if, at any time through June 16, 2027, the Alvotech SA common share price is at or above a volume weighted average price ("VWAP") of $15.00 per share for any ten trading days within any twenty trading day period, and the other half will vest, if at any time during such period, the common share price is at or above a VWAP of $20.00 per share for any ten trading days within any twenty trading day period.
[25] This investment represents Seller Earn Out Shares in Alvotech SA. One half of the Seller Earn Out Shares will vest if, at any time through June 16, 2027, the Alvotech SA common share price is at or above a VWAP of $15.00 per share for any ten trading days within any twenty trading day period, and the other half will vest, if at any time during such period, the common share price is at or above a VWAP of $20.00 per share for any ten trading days within any twenty trading day period.
[26] This investment represents a revenue interest financing term loan in which the Company receives periodic interest payments based on a percentage of revenues earned at the respective portfolio company over the life of the loan.
[27] This investment was renamed during the three months ended March 31, 2022. For periods prior to March 31, 2022, this investment was referenced as Realfi Strategic Capital Funding LLC.
[28] See Note 3 in the accompanying notes to the Consolidated Financial Statements for portfolio composition.
[29] This investment was valued using net asset value as a practical expedient for fair value. Consistent with ASC 820, these investments are excluded from the hierarchical levels.
[30] See Note 3 in the accompanying notes to the Consolidated Financial Statements for portfolio composition.
[31] This investment was valued using net asset value as a practical expedient for fair value. Consistent with ASC 820, these investments are excluded from the hierarchical levels.
[32] Income producing through payment of dividends or distributions.
[33] Income producing through payment of dividends or distributions.
[34] This investment was renamed during the three months ended March 31, 2023. For periods prior to March 31, 2023, this investment was referenced as PFNY Holdings, LLC.