v3.25.2
Schedule 12-14 - Schedule of Investments in and Advances to Affiliates (Details)
€ in Thousands, ¥ in Thousands, £ in Thousands, $ in Thousands, $ in Thousands
 9 Months Ended
Jun. 30, 2025
USD ($)
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Jun. 30, 2024
USD ($)
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Jun. 30, 2025
EUR (€)
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Jun. 30, 2025
GBP (£)
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Jun. 30, 2025
CAD ($)
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Jun. 30, 2025
JPY (¥)
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Sep. 30, 2024
USD ($)
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Sep. 30, 2024
EUR (€)
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Sep. 30, 2024
GBP (£)
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Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance $ 3,021,279                
Fair value, ending balance $ 2,809,377                
Investment owned, percent of net assets (as a percent) 190.28%   190.28% 190.28% 190.28% 190.28% 203.07% 203.07% 203.07%
Affiliate investments                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance $ 35,677                
Fair value, ending balance 55,978                
Control investments                  
Schedule of Investments [Line Items]                  
Investment owned, balance, principal amount 222,619 $ 214,029              
Net Realized Gain (Loss) 13 786              
Amount of Interest, Fees or Dividends Credited in Income 18,030 23,936              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 289,404 [1],[2] 297,091              
Gross Additions 28,801 26,821              
Gross Reductions (87,508) (24,840)              
Fair value, ending balance $ 230,697 [1],[2] $ 299,072              
Investment owned, percent of net assets (as a percent) 15.60% 20.00% 15.60% 15.60% 15.60% 15.60% 19.50% 19.50% 19.50%
Affiliate Investments                  
Schedule of Investments [Line Items]                  
Investment owned, balance, principal amount $ 54,741 $ 36,404              
Net Realized Gain (Loss) 190 0              
Amount of Interest, Fees or Dividends Credited in Income 685 542              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 35,677 [3] 23,349              
Gross Additions 25,111 36,654              
Gross Reductions (4,810) (24,607)              
Fair value, ending balance $ 55,978 [3] $ 35,396              
Investment owned, percent of net assets (as a percent) 3.80% 2.40% 3.80% 3.80% 3.80% 3.80% 2.40% 2.40% 2.40%
Investment, Affiliated Issuer, Control and Affiliate                  
Schedule of Investments [Line Items]                  
Investment owned, balance, principal amount $ 277,360 $ 250,433              
Net Realized Gain (Loss) 203 786              
Amount of Interest, Fees or Dividends Credited in Income 18,715 24,478              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 325,081 320,440              
Gross Additions 53,912 63,475              
Gross Reductions (92,318) (49,447)              
Fair value, ending balance $ 286,675 $ 334,468              
Investment owned, percent of net assets (as a percent) 19.40% 22.40% 19.40% 19.40% 19.40% 19.40%      
Investment, Identifier [Axis]: 107 Fair Street LLC, Real Estate Development, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) [4],[5],[6],[7]             13.00% 13.00% 13.00%
Investment owned, balance, principal amount [4],[5],[7],[8]             $ 1,989    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[7] $ 1,934                
Investment, Identifier [Axis]: 107-109 Beech OAK22 LLC, Real Estate Development, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 11.00% [9],[10],[11]   11.00% [9],[10],[11] 11.00% [9],[10],[11] 11.00% [9],[10],[11] 11.00% [9],[10],[11] 11.00% [4],[5],[6] 11.00% [4],[5],[6] 11.00% [4],[5],[6]
Investment owned, balance, principal amount $ 16,173 [9],[10],[12]           $ 31,231 [4],[5],[8]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5] 31,015                
Fair value, ending balance [9],[10] 16,098                
Investment, Identifier [Axis]: 112-126 Van Houten Real22 LLC, Real Estate Development, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) [4],[5],[6],[7]             13.00% 13.00% 13.00%
Investment owned, balance, principal amount [4],[5],[7],[8]             $ 5,336    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[7] $ 5,288                
Investment, Identifier [Axis]: 1261229 BC LTD, Pharmaceuticals, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [13],[14] 6.25%   6.25% 6.25% 6.25% 6.25%      
Investment, interest rate (as a percent) [11],[13],[14] 10.56%   10.56% 10.56% 10.56% 10.56%      
Investment owned, balance, principal amount [12],[13],[14] $ 19,600                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13],[14] $ 18,946                
Investment, Identifier [Axis]: 1261229 BC LTD, Pharmaceuticals, Fixed Rate Bond                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) [11],[13] 10.00%   10.00% 10.00% 10.00% 10.00%      
Investment owned, balance, principal amount [12],[13] $ 9,100                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13] $ 9,186                
Investment, Identifier [Axis]: A.T. Holdings II Ltd., Biotechnology, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 5.97% [9],[11],[13],[15]   5.97% [9],[11],[13],[15] 5.97% [9],[11],[13],[15] 5.97% [9],[11],[13],[15] 5.97% [9],[11],[13],[15] 14.25% [5],[6],[16],[17] 14.25% [5],[6],[16],[17] 14.25% [5],[6],[16],[17]
Investment, interest rate, paid in kind (as a percent) [9],[13],[15] 8.28%   8.28% 8.28% 8.28% 8.28%      
Investment owned, balance, principal amount $ 23,083 [9],[12],[13],[15]           $ 21,870 [5],[8],[16],[17]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[17] 21,979                
Fair value, ending balance [9],[13],[15] $ 22,621                
Investment, Identifier [Axis]: A.T. Holdings II SÀRL, Biotechnology, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 22.50% [9],[13],[18]   22.50% [9],[13],[18] 22.50% [9],[13],[18] 22.50% [9],[13],[18] 22.50% [9],[13],[18] 22.50% [5],[16],[19] 22.50% [5],[16],[19] 22.50% [5],[16],[19]
Investment owned, balance, principal amount $ 7,152 [9],[12],[13],[18]           $ 7,835 [5],[8],[16],[19]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[19] 7,796                
Fair value, ending balance [9],[13],[18] $ 7,116                
Investment, Identifier [Axis]: ACESO Holding 4 S.A.R.L., Health Care Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[13],[14]   5.75% [9],[13],[14] 5.75% [9],[13],[14] 5.75% [9],[13],[14] 5.75% [9],[13],[14] 5.75% [4],[5],[16],[20] 5.75% [4],[5],[16],[20] 5.75% [4],[5],[16],[20]
Investment, interest rate (as a percent) [9],[11],[13],[14] 7.74%   7.74% 7.74% 7.74% 7.74%      
Investment owned, balance, principal amount     € 4,204 [9],[12],[13],[14]       $ 0 [4],[5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] $ (47)                
Fair value, ending balance [9],[13],[14] $ 4,871                
Investment, Identifier [Axis]: ACESO Holding 4 S.A.R.L., Health Care Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[13],[14]   5.75% [9],[13],[14] 5.75% [9],[13],[14] 5.75% [9],[13],[14] 5.75% [9],[13],[14] 5.75% [5],[16],[20] 5.75% [5],[16],[20] 5.75% [5],[16],[20]
Investment, interest rate (as a percent) 8.13% [9],[11],[13],[14]   8.13% [9],[11],[13],[14] 8.13% [9],[11],[13],[14] 8.13% [9],[11],[13],[14] 8.13% [9],[11],[13],[14] 8.91% [5],[6],[16],[20] 8.91% [5],[6],[16],[20] 8.91% [5],[6],[16],[20]
Investment owned, balance, principal amount $ 16,817 [9],[12],[13],[14]             € 16,817 [5],[8],[16],[20]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 18,393                
Fair value, ending balance [9],[13],[14] $ 19,484                
Investment, Identifier [Axis]: ACESO Holding 4 S.A.R.L., Health Care Services, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 5.75%   5.75% 5.75% 5.75% 5.75%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 7.74%   7.74% 7.74% 7.74% 7.74%      
Investment owned, balance, principal amount [9],[12],[13],[14] $ 12,405                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 14,372                
Investment, Identifier [Axis]: ADB Companies, LLC, Construction & Engineering, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.50% [9],[14]   7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 6.50% [5],[20] 6.50% [5],[20] 6.50% [5],[20]
Investment, interest rate (as a percent) 11.06% [9],[11],[14]   11.06% [9],[11],[14] 11.06% [9],[11],[14] 11.06% [9],[11],[14] 11.06% [9],[11],[14] 11.37% [5],[6],[20] 11.37% [5],[6],[20] 11.37% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) [9],[14] 1.00%   1.00% 1.00% 1.00% 1.00%      
Investment owned, balance, principal amount $ 2,807 [9],[12],[14]           $ 3,079 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 2,955                
Fair value, ending balance [9],[14] $ 2,708                
Investment, Identifier [Axis]: ADB Companies, LLC, Construction & Engineering, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.50% [9],[14]   7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 6.50% [5],[20] 6.50% [5],[20] 6.50% [5],[20]
Investment, interest rate (as a percent) 11.06% [9],[11],[14]   11.06% [9],[11],[14] 11.06% [9],[11],[14] 11.06% [9],[11],[14] 11.06% [9],[11],[14] 12.01% [5],[6],[20] 12.01% [5],[6],[20] 12.01% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) [9],[14] 1.00%   1.00% 1.00% 1.00% 1.00%      
Investment owned, balance, principal amount $ 803 [9],[12],[14]           $ 875 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 840                
Fair value, ending balance [9],[14] $ 775                
Investment, Identifier [Axis]: ADB Companies, LLC, Construction & Engineering, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.50% [9],[14]   7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 6.50% [5],[20] 6.50% [5],[20] 6.50% [5],[20]
Investment, interest rate (as a percent) 11.06% [9],[11],[14]   11.06% [9],[11],[14] 11.06% [9],[11],[14] 11.06% [9],[11],[14] 11.06% [9],[11],[14] 11.37% [5],[6],[20] 11.37% [5],[6],[20] 11.37% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) [9],[14] 1.00%   1.00% 1.00% 1.00% 1.00%      
Investment owned, balance, principal amount $ 14,676 [9],[12],[14]           $ 16,053 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 15,410                
Fair value, ending balance [9],[14] $ 14,162                
Investment, Identifier [Axis]: ADC Therapeutics SA, Biotechnology, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 1,674,030 [13]   1,674,030 [13] 1,674,030 [13] 1,674,030 [13] 1,674,030 [13] 1,674,030 [16] 1,674,030 [16] 1,674,030 [16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16] $ 0                
Fair value, ending balance [13] $ 0                
Investment, Identifier [Axis]: ADC Therapeutics SA, Biotechnology, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.50% [9],[13],[14]   7.50% [9],[13],[14] 7.50% [9],[13],[14] 7.50% [9],[13],[14] 7.50% [9],[13],[14] 7.50% [5],[16],[20] 7.50% [5],[16],[20] 7.50% [5],[16],[20]
Investment, interest rate (as a percent) 11.95% [9],[11],[13],[14]   11.95% [9],[11],[13],[14] 11.95% [9],[11],[13],[14] 11.95% [9],[11],[13],[14] 11.95% [9],[11],[13],[14] 12.25% [5],[6],[16],[20] 12.25% [5],[6],[16],[20] 12.25% [5],[6],[16],[20]
Investment owned, balance, principal amount $ 6,589 [9],[12],[13],[14]           $ 6,589 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 6,424                
Fair value, ending balance [9],[13],[14] $ 6,490                
Investment, Identifier [Axis]: ADC Therapeutics SA, Biotechnology, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 28,948 [9],[13]   28,948 [9],[13] 28,948 [9],[13] 28,948 [9],[13] 28,948 [9],[13] 28,948 [5],[16] 28,948 [5],[16] 28,948 [5],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 33                
Fair value, ending balance [9],[13] $ 19                
Investment, Identifier [Axis]: AIP RD Buyer Corp., Distributors, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 17,870 [9]   17,870 [9] 17,870 [9] 17,870 [9] 17,870 [9] 17,870 [5] 17,870 [5] 17,870 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 2,220                
Fair value, ending balance [9] $ 2,837                
Investment, Identifier [Axis]: ASP Integrity Acquisition Co LLC, Diversified Support Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 4.00%   4.00% 4.00% 4.00% 4.00%      
Investment, interest rate (as a percent) [9],[10],[11],[14] 11.50%   11.50% 11.50% 11.50% 11.50%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 126                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ 37                
Investment, Identifier [Axis]: ASP Integrity Acquisition Co LLC, Diversified Support Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [9],[11],[14] 9.32%   9.32% 9.32% 9.32% 9.32%      
Investment owned, balance, principal amount [9],[12],[14] $ 15,086                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 14,612                
Investment, Identifier [Axis]: ASP Integrity Acquisition Co LLC, Diversified Support Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (79)                
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 (as a percent) 6.00% [9],[10],[13],[14]   6.00% [9],[10],[13],[14] 6.00% [9],[10],[13],[14] 6.00% [9],[10],[13],[14] 6.00% [9],[10],[13],[14] 6.00% [4],[5],[16],[20] 6.00% [4],[5],[16],[20] 6.00% [4],[5],[16],[20]
Investment, interest rate (as a percent) 10.44% [9],[10],[11],[13],[14]   10.44% [9],[10],[11],[13],[14] 10.44% [9],[10],[11],[13],[14] 10.44% [9],[10],[11],[13],[14] 10.44% [9],[10],[11],[13],[14] 11.29% [4],[5],[6],[16],[20] 11.29% [4],[5],[6],[16],[20] 11.29% [4],[5],[6],[16],[20]
Investment owned, balance, principal amount $ 226 [9],[10],[12],[13],[14]           $ 230 [4],[5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] 211                
Fair value, ending balance [9],[10],[13],[14] 219                
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 (as a percent) [5],[16],[20]             6.00% 6.00% 6.00%
Investment, interest rate (as a percent) [5],[6],[16],[20]             10.66% 10.66% 10.66%
Investment owned, balance, principal amount [5],[8],[16],[20]             $ 3,243    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] $ 3,087                
Investment, Identifier [Axis]: ASP-R-PAC Acquisition Co LLC, Paper & Plastic Packaging Products & Materials, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 6.00%   6.00% 6.00% 6.00% 6.00%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 10.54%   10.54% 10.54% 10.54% 10.54%      
Investment owned, balance, principal amount [9],[12],[13],[14] $ 3,218                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 3,166                
Investment, Identifier [Axis]: ASP-R-PAC Acquisition Co LLC, Paper & Plastic Packaging Products & Materials, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 6.00%   6.00% 6.00% 6.00% 6.00%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 10.28%   10.28% 10.28% 10.28% 10.28%      
Investment owned, balance, principal amount [9],[12],[13],[14] $ 667                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] 657                
Investment, Identifier [Axis]: ATNX SPV, LLC, Pharmaceuticals, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) [5],[16],[17]             15.89% 15.89% 15.89%
Investment owned, balance, principal amount 13,768 [9],[12],[13],[15]           $ 12,989 [5],[8],[16],[17]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[17] 12,892                
Fair value, ending balance [9],[13],[15] $ 13,631                
Investment, Identifier [Axis]: AVSC Holding Corp., Specialized Consumer Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (108)                
Investment, Identifier [Axis]: AVSC Holding Corp., Specialized Consumer Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [9],[11],[14] 9.33%   9.33% 9.33% 9.33% 9.33%      
Investment owned, balance, principal amount [9],[12],[14] $ 56,067                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] 55,030                
Investment, Identifier [Axis]: Access CIG, LLC, Diversified Support Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [20]             5.00% 5.00% 5.00%
Investment, interest rate (as a percent) [6],[20]             10.25% 10.25% 10.25%
Investment owned, balance, principal amount [8],[20]             $ 1,985    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] $ 1,996                
Investment, Identifier [Axis]: Accession Risk Management Group, Inc., Insurance Brokers, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.75% [9],[10],[14]   4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [4],[5],[20] 4.75% [4],[5],[20] 4.75% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (5)                
Fair value, ending balance [9],[10],[14] 0                
Investment, Identifier [Axis]: Accession Risk Management Group, Inc., Insurance Brokers, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             4.75% 4.75% 4.75%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] $ (45)                
Investment, Identifier [Axis]: Accession Risk Management Group, Inc., Insurance Brokers, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment, interest rate (as a percent) [9],[10],[11],[14] 9.05%   9.05% 9.05% 9.05% 9.05%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 587                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ 587                
Investment, Identifier [Axis]: Accession Risk Management Group, Inc., Insurance Brokers, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment, interest rate (as a percent) [9],[11],[14] 9.05%   9.05% 9.05% 9.05% 9.05%      
Investment owned, balance, principal amount [9],[12],[14] $ 4,133                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] 4,133                
Investment, Identifier [Axis]: Accupac, Inc., Personal Care Products, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             6.00% 6.00% 6.00%
Investment, interest rate (as a percent) [4],[5],[6],[20]             10.90% 10.90% 10.90%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 2,482    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 2,443                
Investment, Identifier [Axis]: Accupac, Inc., Personal Care Products, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             6.00% 6.00% 6.00%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (59)                
Investment, Identifier [Axis]: Accupac, Inc., Personal Care Products, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             6.00% 6.00% 6.00%
Investment, interest rate (as a percent) [5],[6],[20]             10.90% 10.90% 10.90%
Investment owned, balance, principal amount [5],[8],[20]             $ 20,024    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 19,724                
Investment, Identifier [Axis]: Acquia Inc., Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.00% [9],[14]   7.00% [9],[14] 7.00% [9],[14] 7.00% [9],[14] 7.00% [9],[14] 7.00% [4],[5],[20] 7.00% [4],[5],[20] 7.00% [4],[5],[20]
Investment, interest rate (as a percent) 11.43% [9],[11],[14]   11.43% [9],[11],[14] 11.43% [9],[11],[14] 11.43% [9],[11],[14] 11.43% [9],[11],[14] 12.47% [4],[5],[6],[20] 12.47% [4],[5],[6],[20] 12.47% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 2,709 [9],[12],[14]           $ 1,084 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 1,084                
Fair value, ending balance [9],[14] $ 2,709                
Investment, Identifier [Axis]: Acquia Inc., Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.00% [9],[14]   7.00% [9],[14] 7.00% [9],[14] 7.00% [9],[14] 7.00% [9],[14] 7.00% [5],[20] 7.00% [5],[20] 7.00% [5],[20]
Investment, interest rate (as a percent) 11.41% [9],[11],[14]   11.41% [9],[11],[14] 11.41% [9],[11],[14] 11.41% [9],[11],[14] 11.41% [9],[11],[14] 12.46% [5],[6],[20] 12.46% [5],[6],[20] 12.46% [5],[6],[20]
Investment owned, balance, principal amount $ 6,400 [9],[12],[14]           $ 6,400 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 6,400                
Fair value, ending balance [9],[14] $ 6,400                
Investment, Identifier [Axis]: Acquia Inc., Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.00% [9],[14]   7.00% [9],[14] 7.00% [9],[14] 7.00% [9],[14] 7.00% [9],[14] 7.00% [5],[20] 7.00% [5],[20] 7.00% [5],[20]
Investment, interest rate (as a percent) 11.41% [9],[11],[14]   11.41% [9],[11],[14] 11.41% [9],[11],[14] 11.41% [9],[11],[14] 11.41% [9],[11],[14] 12.46% [5],[6],[20] 12.46% [5],[6],[20] 12.46% [5],[6],[20]
Investment owned, balance, principal amount $ 25,332 [9],[12],[14]           $ 25,332 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 25,332                
Fair value, ending balance [9],[14] 25,332                
Investment, Identifier [Axis]: AirStrip Technologies, Inc., Application Software, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [5]             5,715 5,715 5,715
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 0                
Investment, Identifier [Axis]: All Web Leads, Inc., Advertising, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 11,499 [9] 11,499 11,499 [9] 11,499 [9] 11,499 [9] 11,499 [9] 11,499 [5] 11,499 [5] 11,499 [5]
Investment owned, balance, principal amount $ 0 $ 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 1,622 [5] 0              
Gross Additions 0 1,622              
Gross Reductions 0 0              
Fair value, ending balance $ 1,622 [9] $ 1,622              
Investment owned, percent of net assets (as a percent) 0.10% 0.10% 0.10% 0.10% 0.10% 0.10%      
Investment, Identifier [Axis]: All Web Leads, Inc., Advertising, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.00% [9],[10],[14] 4.00% 4.00% [9],[10],[14] 4.00% [9],[10],[14] 4.00% [9],[10],[14] 4.00% [9],[10],[14] 4.00% [4],[5],[20] 4.00% [4],[5],[20] 4.00% [4],[5],[20]
Investment, interest rate (as a percent) 8.40% [9],[10],[11],[14] 9.34% 8.40% [9],[10],[11],[14] 8.40% [9],[10],[11],[14] 8.40% [9],[10],[11],[14] 8.40% [9],[10],[11],[14] 8.70% [4],[5],[6],[20] 8.70% [4],[5],[6],[20] 8.70% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 1,440 [9],[10],[12],[14] $ 1,560         $ 1,560 [4],[5],[8],[20]    
Net Realized Gain (Loss) 0 0              
Amount of Interest, Fees or Dividends Credited in Income 117 45              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 1,506 [4],[5],[20] 0              
Gross Additions 20 1,506              
Gross Reductions (140) 0              
Fair value, ending balance $ 1,386 [9],[10],[14] $ 1,506              
Investment owned, percent of net assets (as a percent) 0.10% 0.10% 0.10% 0.10% 0.10% 0.10%      
Investment, Identifier [Axis]: All Web Leads, Inc., Advertising, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.00% [9],[14] 4.00% 4.00% [9],[14] 4.00% [9],[14] 4.00% [9],[14] 4.00% [9],[14] 4.00% [5],[20] 4.00% [5],[20] 4.00% [5],[20]
Investment, interest rate (as a percent) 6.40% [9],[11],[14] 7.34% 6.40% [9],[11],[14] 6.40% [9],[11],[14] 6.40% [9],[11],[14] 6.40% [9],[11],[14] 6.70% [5],[6],[20] 6.70% [5],[6],[20] 6.70% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) 2.00% [9],[14] 2.00% 2.00% [9],[14] 2.00% [9],[14] 2.00% [9],[14] 2.00% [9],[14] 2.00% [5],[20] 2.00% [5],[20] 2.00% [5],[20]
Investment owned, balance, principal amount $ 1,811 [9],[12],[14] $ 1,809         $ 1,819 [5],[8],[20]    
Net Realized Gain (Loss) 1 0              
Amount of Interest, Fees or Dividends Credited in Income 141 52              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 1,741 [5],[20] 0              
Gross Additions 50 1,731              
Gross Reductions (58) 0              
Fair value, ending balance $ 1,733 [9],[14] $ 1,731              
Investment owned, percent of net assets (as a percent) 0.10% 0.10% 0.10% 0.10% 0.10% 0.10%      
Investment, Identifier [Axis]: All Web Leads, Inc., Advertising, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[14] 5.00% 5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 7.40% [9],[11],[14] 8.34% 7.40% [9],[11],[14] 7.40% [9],[11],[14] 7.40% [9],[11],[14] 7.40% [9],[11],[14] 7.70% [5],[6],[20] 7.70% [5],[6],[20] 7.70% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) 2.00% [9],[14] 2.00% 2.00% [9],[14] 2.00% [9],[14] 2.00% [9],[14] 2.00% [9],[14] 2.00% [5],[20] 2.00% [5],[20] 2.00% [5],[20]
Investment owned, balance, principal amount $ 3,693 [9],[12],[14] $ 3,602         $ 3,637 [5],[8],[20]    
Net Realized Gain (Loss) 0 0              
Amount of Interest, Fees or Dividends Credited in Income 307 116              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 3,463 [5],[20] 0              
Gross Additions 99 3,429              
Gross Reductions (47) 0              
Fair value, ending balance $ 3,515 [9],[14] $ 3,429              
Investment owned, percent of net assets (as a percent) 0.20% 0.20% 0.20% 0.20% 0.20% 0.20%      
Investment, Identifier [Axis]: All Web Leads, Inc., Advertising, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 10.00% [9],[18] 10.00% 10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [5],[19] 10.00% [5],[19] 10.00% [5],[19]
Investment owned, balance, principal amount $ 3,816 [9],[12],[18] $ 3,451         $ 3,541 [5],[8],[19]    
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 3,183 [5],[19] 0              
Gross Additions 81 3,102              
Gross Reductions 0 0              
Fair value, ending balance $ 3,264 [9],[18] $ 3,102              
Investment owned, percent of net assets (as a percent) 0.20% 0.20% 0.20% 0.20% 0.20% 0.20%      
Investment, Identifier [Axis]: Alto Pharmacy Holdings, Inc., Health Care Technology, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             11.50% 11.50% 11.50%
Investment, interest rate (as a percent) [5],[6],[20]             8.00% 8.00% 8.00%
Investment, interest rate, paid in kind (as a percent) [5],[20]             8.93% 8.93% 8.93%
Investment owned, balance, principal amount [5],[8],[20]             $ 10,134    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 9,120                
Investment, Identifier [Axis]: Alto Pharmacy Holdings, Inc., Health Care Technology, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [5]             598,283 598,283 598,283
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] 802                
Investment, Identifier [Axis]: Alvogen Pharma US, Inc., Pharmaceuticals, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             7.50% 7.50% 7.50%
Investment, interest rate (as a percent) [5],[6],[20]             12.45% 12.45% 12.45%
Investment owned, balance, principal amount [5],[8],[20]             $ 16,143    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 14,852                
Investment, Identifier [Axis]: Alvogen Pharma US, Inc., Pharmaceuticals, Second Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 10.50%   10.50% 10.50% 10.50% 10.50%      
Investment, interest rate (as a percent) [9],[11],[14] 6.80%   6.80% 6.80% 6.80% 6.80%      
Investment, interest rate, paid in kind (as a percent) [9],[14] 8.00%   8.00% 8.00% 8.00% 8.00%      
Investment owned, balance, principal amount [9],[12],[14] $ 2,708                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 2,667                
Investment, Identifier [Axis]: Alvotech Holdings S.A., Biotechnology, Common Stock 1                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 76,023 [13]   76,023 [13] 76,023 [13] 76,023 [13] 76,023 [13] 118,744 [16] 118,744 [16] 118,744 [16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16] $ 1,413                
Fair value, ending balance [13] $ 693                
Investment, Identifier [Axis]: Alvotech Holdings S.A., Biotechnology, Common Stock 2                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 70,820 [9],[13],[21]   70,820 [9],[13],[21] 70,820 [9],[13],[21] 70,820 [9],[13],[21] 70,820 [9],[13],[21] 70,820 [5],[16],[22] 70,820 [5],[16],[22] 70,820 [5],[16],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[22] $ 315                
Fair value, ending balance [9],[13],[21] 244                
Investment, Identifier [Axis]: American Auto Auction Group, LLC, Diversified Support Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [20]             5.00% 5.00% 5.00%
Investment, interest rate (as a percent) [6],[20]             9.75% 9.75% 9.75%
Investment owned, balance, principal amount [8],[20]             $ 2,487    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] 2,501                
Investment, Identifier [Axis]: American Auto Auction Group, LLC, Diversified Support Services, Second Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             8.75% 8.75% 8.75%
Investment, interest rate (as a percent) [5],[6],[20]             13.50% 13.50% 13.50%
Investment owned, balance, principal amount [5],[8],[20]             $ 17,048    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 16,494                
Investment, Identifier [Axis]: American Money Management Corporation, Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [13],[14] 5.15%   5.15% 5.15% 5.15% 5.15%      
Investment, interest rate (as a percent) [11],[13],[14] 9.42%   9.42% 9.42% 9.42% 9.42%      
Investment owned, balance, principal amount [12],[13],[14] $ 3,500                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13],[14] 3,483                
Investment, Identifier [Axis]: Amspec Parent LLC, Diversified Support Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             5.50% 5.50% 5.50%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Investment, Identifier [Axis]: Amspec Parent LLC, Diversified Support Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             5.50% 5.50% 5.50%
Investment, interest rate (as a percent) [5],[6],[20]             10.10% 10.10% 10.10%
Investment owned, balance, principal amount [5],[8],[20]             $ 33,390    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 33,390                
Investment, Identifier [Axis]: Amspec Parent LLC, Diversified Support Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             5.50% 5.50% 5.50%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Investment, Identifier [Axis]: Anchorage Capital CLO 20, LTD., Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [16],[20]             7.61% 7.61% 7.61%
Investment, interest rate (as a percent) [6],[16],[20]             12.89% 12.89% 12.89%
Investment owned, balance, principal amount [8],[16],[20]             $ 750    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16],[20] $ 736                
Investment, Identifier [Axis]: Arches Buyer Inc., Interactive Media & Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[14]   5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [5],[20] 5.50% [5],[20] 5.50% [5],[20]
Investment, interest rate (as a percent) 9.83% [9],[11],[14]   9.83% [9],[11],[14] 9.83% [9],[11],[14] 9.83% [9],[11],[14] 9.83% [9],[11],[14] 10.35% [5],[6],[20] 10.35% [5],[6],[20] 10.35% [5],[6],[20]
Investment owned, balance, principal amount $ 47,212 [9],[12],[14]           $ 47,451 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 47,428                
Fair value, ending balance [9],[14] $ 47,212                
Investment, Identifier [Axis]: Ares XLIV CLO, Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.13% [13],[14]   7.13% [13],[14] 7.13% [13],[14] 7.13% [13],[14] 7.13% [13],[14] 7.13% [16],[20] 7.13% [16],[20] 7.13% [16],[20]
Investment, interest rate (as a percent) 11.39% [11],[13],[14]   11.39% [11],[13],[14] 11.39% [11],[13],[14] 11.39% [11],[13],[14] 11.39% [11],[13],[14] 12.43% [6],[16],[20] 12.43% [6],[16],[20] 12.43% [6],[16],[20]
Investment owned, balance, principal amount $ 3,500 [12],[13],[14]           $ 3,500 [8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16],[20] 3,509                
Fair value, ending balance [13],[14] $ 3,523                
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Specialized Finance, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 12,463,242 [9] 12,463,242 12,463,242 [9] 12,463,242 [9] 12,463,242 [9] 12,463,242 [9] 12,463,242 [5] 12,463,242 [5] 12,463,242 [5]
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 1,246 [5] 89              
Gross Additions 250 1,159              
Gross Reductions 0 (2)              
Fair value, ending balance $ 1,496 [9] $ 1,246              
Investment owned, percent of net assets (as a percent) 0.10% 0.10% 0.10% 0.10% 0.10% 0.10%      
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Specialized Finance, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Net Realized Gain (Loss)   $ 0              
Amount of Interest, Fees or Dividends Credited in Income   329              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance   21,823              
Gross Additions   33              
Gross Reductions   (21,856)              
Fair value, ending balance   $ 0              
Investment owned, percent of net assets (as a percent)   0.00%              
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Specialized Finance, Preferred Equity                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares                
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   1,005              
Gross Additions   153              
Gross Reductions   (1,158)              
Fair value, ending balance   $ 0              
Investment owned, percent of net assets (as a percent)   0.00%              
Investment, Identifier [Axis]: Assembled Brands Capital LLC, Specialized Finance, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 78,045 [9] 78,045 78,045 [9] 78,045 [9] 78,045 [9] 78,045 [9] 78,045 [5] 78,045 [5] 78,045 [5]
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 [5] 0              
Gross Additions 0 0              
Gross Reductions 0 0              
Fair value, ending balance $ 0 [9] $ 0              
Investment owned, percent of net assets (as a percent) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: Astra Acquisition Corp., Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.75% [9],[14],[18]   6.75% [9],[14],[18] 6.75% [9],[14],[18] 6.75% [9],[14],[18] 6.75% [9],[14],[18] 6.75% [20] 6.75% [20] 6.75% [20]
Investment, interest rate (as a percent) [6],[20]             11.35% 11.35% 11.35%
Investment owned, balance, principal amount $ 8,836 [9],[12],[14],[18]           $ 7,907 [8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] 6,555                
Fair value, ending balance [9],[14],[18] $ 4,197                
Investment, Identifier [Axis]: Astra Acquisition Corp., Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [9],[14],[18]   5.25% [9],[14],[18] 5.25% [9],[14],[18] 5.25% [9],[14],[18] 5.25% [9],[14],[18] 5.25% [5],[19],[20] 5.25% [5],[19],[20] 5.25% [5],[19],[20]
Investment owned, balance, principal amount $ 12,537 [9],[12],[14],[18]           $ 12,537 [5],[8],[19],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[19],[20] 3,605                
Fair value, ending balance [9],[14],[18] $ 0                
Investment, Identifier [Axis]: Asurion, LLC, Property & Casualty Insurance, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [14] 4.25%   4.25% 4.25% 4.25% 4.25%      
Investment, interest rate (as a percent) [11],[14] 8.68%   8.68% 8.68% 8.68% 8.68%      
Investment owned, balance, principal amount [12],[14] $ 19,898                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [14] $ 19,715                
Investment, Identifier [Axis]: Aurelia Netherlands B.V., Interactive Media & Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 6.83%   6.83% 6.83% 6.83% 6.83%      
Investment owned, balance, principal amount | € [9],[12],[13],[14]     € 47,682            
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 55,832                
Investment, Identifier [Axis]: Aurelia Netherlands Midco 2 B.V., Interactive Media & Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[16],[20]             5.75% 5.75% 5.75%
Investment, interest rate (as a percent) [5],[6],[16],[20]             9.55% 9.55% 9.55%
Investment owned, balance, principal amount | € [5],[8],[16],[20]               € 28,022  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] $ 30,698                
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 (as a percent) 6.00% [9],[13],[14]   6.00% [9],[13],[14] 6.00% [9],[13],[14] 6.00% [9],[13],[14] 6.00% [9],[13],[14] 7.00% [5],[16],[20] 7.00% [5],[16],[20] 7.00% [5],[16],[20]
Investment, interest rate (as a percent) 10.40% [9],[11],[13],[14]   10.40% [9],[11],[13],[14] 10.40% [9],[11],[13],[14] 10.40% [9],[11],[13],[14] 10.40% [9],[11],[13],[14] 7.70% [5],[6],[16],[20] 7.70% [5],[6],[16],[20] 7.70% [5],[6],[16],[20]
Investment, interest rate, paid in kind (as a percent) [9],[13],[14]   [9],[13],[14] [9],[13],[14] [9],[13],[14] [9],[13],[14] 4.00% [5],[16],[20] 4.00% [5],[16],[20] 4.00% [5],[16],[20]
Investment owned, balance, principal amount $ 31,348 [9],[12],[13],[14]           $ 30,724 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 29,802                
Fair value, ending balance [9],[13],[14] 30,753                
Investment, Identifier [Axis]: Avalara, Inc., Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             6.25% 6.25% 6.25%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Investment, Identifier [Axis]: Avalara, Inc., Application Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             6.25% 6.25% 6.25%
Investment, interest rate (as a percent) [5],[6],[20]             10.85% 10.85% 10.85%
Investment owned, balance, principal amount [5],[8],[20]             $ 50,470    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 50,470                
Investment, Identifier [Axis]: BAART Programs, Inc., Health Care Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[14]   5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 9.56% [9],[11],[14]   9.56% [9],[11],[14] 9.56% [9],[11],[14] 9.56% [9],[11],[14] 9.56% [9],[11],[14] 9.87% [5],[6],[20] 9.87% [5],[6],[20] 9.87% [5],[6],[20]
Investment owned, balance, principal amount $ 3,189 [9],[12],[14]           $ 3,214 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 3,025                
Fair value, ending balance [9],[14] $ 2,817                
Investment, Identifier [Axis]: BAART Programs, Inc., Health Care Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[14]   5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 9.56% [9],[11],[14]   9.56% [9],[11],[14] 9.56% [9],[11],[14] 9.56% [9],[11],[14] 9.56% [9],[11],[14] 9.87% [5],[6],[20] 9.87% [5],[6],[20] 9.87% [5],[6],[20]
Investment owned, balance, principal amount $ 1,239 [9],[12],[14]           $ 1,248 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 1,175                
Fair value, ending balance [9],[14] $ 1,094                
Investment, Identifier [Axis]: BAART Programs, Inc., Health Care Services, Second Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 8.50% [9],[14],[18]   8.50% [9],[14],[18] 8.50% [9],[14],[18] 8.50% [9],[14],[18] 8.50% [9],[14],[18] 8.50% [5],[20] 8.50% [5],[20] 8.50% [5],[20]
Investment, interest rate (as a percent) [5],[6],[20]             13.35% 13.35% 13.35%
Investment owned, balance, principal amount $ 6,452 [9],[12],[14],[18]           $ 6,452 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 5,550                
Fair value, ending balance [9],[14],[18] $ 3,678                
Investment, Identifier [Axis]: BAART Programs, Inc., Health Care Services, Second Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 8.50% [9],[14],[18]   8.50% [9],[14],[18] 8.50% [9],[14],[18] 8.50% [9],[14],[18] 8.50% [9],[14],[18] 8.50% [5],[20] 8.50% [5],[20] 8.50% [5],[20]
Investment, interest rate (as a percent) [5],[6],[20]             13.37% 13.37% 13.37%
Investment owned, balance, principal amount $ 8,920 [9],[12],[14],[18]           $ 8,920 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 7,673                
Fair value, ending balance [9],[14],[18] $ 5,084                
Investment, Identifier [Axis]: BOTA BIDCO GMBH, Diversified Chemicals, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 4.00%   4.00% 4.00% 4.00% 4.00%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 5.93%   5.93% 5.93% 5.93% 5.93%      
Investment owned, balance, principal amount | € [9],[12],[13],[14]     € 4,057            
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 4,589                
Investment, Identifier [Axis]: BOTA BIDCO GMBH, Diversified Chemicals, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 4.50%   4.50% 4.50% 4.50% 4.50%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 6.48%   6.48% 6.48% 6.48% 6.48%      
Investment owned, balance, principal amount [9],[12],[13],[14] $ 16,260                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 18,071                
Investment, Identifier [Axis]: Barracuda Parent, LLC, Systems Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 6.50%   6.50% 6.50% 6.50% 6.50%      
Investment, interest rate (as a percent) [9],[11],[14] 10.78%   10.78% 10.78% 10.78% 10.78%      
Investment owned, balance, principal amount [9],[12],[14] $ 15,448                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 15,040                
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 (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [4],[5],[20] 5.50% [4],[5],[20] 5.50% [4],[5],[20]
Investment, interest rate (as a percent) 13.00% [9],[10],[11],[14]   13.00% [9],[10],[11],[14] 13.00% [9],[10],[11],[14] 13.00% [9],[10],[11],[14] 13.00% [9],[10],[11],[14] 10.52% [4],[5],[6],[20] 10.52% [4],[5],[6],[20] 10.52% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 1,076 [9],[10],[12],[14]           $ 2,835 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 2,811                
Fair value, ending balance [9],[10],[14] 1,034                
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 (as a percent) [5],[20]             5.50% 5.50% 5.50%
Investment, interest rate (as a percent) [5],[6],[20]             10.90% 10.90% 10.90%
Investment owned, balance, principal amount [5],[8],[20]             $ 40,246    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 39,863                
Investment, Identifier [Axis]: Berner Food & Beverage, LLC, Soft Drinks & Non-alcoholic Beverages, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 6.50%   6.50% 6.50% 6.50% 6.50%      
Investment, interest rate (as a percent) [9],[11],[14] 10.93%   10.93% 10.93% 10.93% 10.93%      
Investment owned, balance, principal amount [9],[12],[14] $ 39,934                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 39,283                
Investment, Identifier [Axis]: Berner Food & Beverage, LLC, Soft Drinks & Non-alcoholic Beverages, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 6.50%   6.50% 6.50% 6.50% 6.50%      
Investment, interest rate (as a percent) [9],[11],[14] 10.93%   10.93% 10.93% 10.93% 10.93%      
Investment owned, balance, principal amount [9],[12],[14] $ 4,379                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 4,307                
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [13] 26,654   26,654 26,654 26,654 26,654      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13] $ 48                
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[16],[20]             7.50% 7.50% 7.50%
Investment, interest rate (as a percent) 3.00% [9],[11],[13]   3.00% [9],[11],[13] 3.00% [9],[11],[13] 3.00% [9],[11],[13] 3.00% [9],[11],[13] [4],[5],[6],[16],[20] [4],[5],[6],[16],[20] [4],[5],[6],[16],[20]
Investment, interest rate, paid in kind (as a percent) [9],[13] 10.00%   10.00% 10.00% 10.00% 10.00%      
Investment owned, balance, principal amount $ 3,084 [9],[12],[13]           $ 0 [4],[5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] 0                
Fair value, ending balance [9],[13] $ 2,698                
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[16],[20]             7.50% 7.50% 7.50%
Investment, interest rate (as a percent) 3.00% [9],[11],[13]   3.00% [9],[11],[13] 3.00% [9],[11],[13] 3.00% [9],[11],[13] 3.00% [9],[11],[13] 8.00% [5],[6],[16],[20] 8.00% [5],[6],[16],[20] 8.00% [5],[6],[16],[20]
Investment, interest rate, paid in kind (as a percent) 10.00% [9],[13]   10.00% [9],[13] 10.00% [9],[13] 10.00% [9],[13] 10.00% [9],[13] 4.10% [5],[16],[20] 4.10% [5],[16],[20] 4.10% [5],[16],[20]
Investment owned, balance, principal amount $ 7,439 [9],[12],[13]           $ 2,930 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 2,600                
Fair value, ending balance [9],[13] $ 6,509                
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[16],[20]             7.50% 7.50% 7.50%
Investment, interest rate (as a percent) 3.00% [9],[10],[11],[13]   3.00% [9],[10],[11],[13] 3.00% [9],[10],[11],[13] 3.00% [9],[10],[11],[13] 3.00% [9],[10],[11],[13] 8.00% [5],[6],[16],[20] 8.00% [5],[6],[16],[20] 8.00% [5],[6],[16],[20]
Investment, interest rate, paid in kind (as a percent) 10.00% [9],[10],[13]   10.00% [9],[10],[13] 10.00% [9],[10],[13] 10.00% [9],[10],[13] 10.00% [9],[10],[13] 4.10% [5],[16],[20] 4.10% [5],[16],[20] 4.10% [5],[16],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[13]           $ 7,062 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 6,268                
Fair value, ending balance [9],[10],[13] $ 0                
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[16],[20]             7.50% 7.50% 7.50%
Investment, interest rate (as a percent) [9],[10],[11],[13] 3.00%   3.00% 3.00% 3.00% 3.00%      
Investment, interest rate, paid in kind (as a percent) [9],[10],[13] 10.00%   10.00% 10.00% 10.00% 10.00%      
Investment owned, balance, principal amount $ 0 [9],[10],[12],[13]           $ 0 [4],[5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] 0                
Fair value, ending balance [9],[10],[13] 0                
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, First Lien Term Loan 5                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[16],[20]             7.50% 7.50% 7.50%
Investment owned, balance, principal amount [4],[5],[8],[16],[20]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] $ 0                
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, Warrants 1                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 2,041 [9],[13]   2,041 [9],[13] 2,041 [9],[13] 2,041 [9],[13] 2,041 [9],[13] 32,664 [5],[16] 32,664 [5],[16] 32,664 [5],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 10                
Fair value, ending balance [9],[13] $ 2                
Investment, Identifier [Axis]: BioXcel Therapeutics, Inc., Pharmaceuticals, Warrants 2                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 586 [9],[13]   586 [9],[13] 586 [9],[13] 586 [9],[13] 586 [9],[13] 9,382 [5],[16] 9,382 [5],[16] 9,382 [5],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 3                
Fair value, ending balance [9],[13] 1                
Investment, Identifier [Axis]: Blackhawk Network Holdings, Inc., Data Processing & Outsourced Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [20]             5.00% 5.00% 5.00%
Investment, interest rate (as a percent) [6],[20]             9.85% 9.85% 9.85%
Investment owned, balance, principal amount [8],[20]             $ 19,336    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] $ 19,444                
Investment, Identifier [Axis]: Blumenthal Temecula, LLC, Automotive Retail, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 394,297 [9],[23]   394,297 [9],[23] 394,297 [9],[23] 394,297 [9],[23] 394,297 [9],[23] 394,297 [5] 394,297 [5] 394,297 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 79                
Fair value, ending balance [9],[23] $ 63                
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 [9]   1,708,618 [9] 1,708,618 [9] 1,708,618 [9] 1,708,618 [9] 1,708,618 [5] 1,708,618 [5] 1,708,618 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 2,136                
Fair value, ending balance [9] $ 2,409                
Investment, Identifier [Axis]: Blumenthal Temecula, LLC, Automotive Retail, Preferred Equity 2                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 394,297 [9]   394,297 [9] 394,297 [9] 394,297 [9] 394,297 [9] 394,297 [5] 394,297 [5] 394,297 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 477                
Fair value, ending balance [9] $ 528                
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 [9] 829 829 [9] 829 [9] 829 [9] 829 [9] 829 [5] 829 [5] 829 [5]
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 [5] 0              
Gross Additions 0 0              
Gross Reductions 0 0              
Fair value, ending balance $ 0 [9] $ 0              
Investment owned, percent of net assets (as a percent) 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 [9] 34,984,460 34,984,460 [9] 34,984,460 [9] 34,984,460 [9] 34,984,460 [9] 34,984,460 [5] 34,984,460 [5] 34,984,460 [5]
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 [5] 27,638              
Gross Additions 0 0              
Gross Reductions (1,749) 0              
Fair value, ending balance $ 25,889 [9] $ 27,638              
Investment owned, percent of net assets (as a percent) 1.80% 1.80% 1.80% 1.80% 1.80% 1.80%      
Investment, Identifier [Axis]: CBAM 2017-2, LTD., Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.36% [13],[14]   7.36% [13],[14] 7.36% [13],[14] 7.36% [13],[14] 7.36% [13],[14] 7.36% [16],[20] 7.36% [16],[20] 7.36% [16],[20]
Investment, interest rate (as a percent) 11.64% [11],[13],[14]   11.64% [11],[13],[14] 11.64% [11],[13],[14] 11.64% [11],[13],[14] 11.64% [11],[13],[14] 12.65% [6],[16],[20] 12.65% [6],[16],[20] 12.65% [6],[16],[20]
Investment owned, balance, principal amount $ 489 [12],[13],[14]           $ 489 [8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16],[20] 462                
Fair value, ending balance [13],[14] 485                
Investment, Identifier [Axis]: CD&R Firefly Bidco Limited, Other Specialty Retail, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [16],[20]             5.75% 5.75% 5.75%
Investment, interest rate (as a percent) [6],[16],[20]             10.95% 10.95% 10.95%
Investment owned, balance, principal amount | £ [8],[16],[20]                 £ 14,807
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16],[20] 19,878                
Investment, Identifier [Axis]: CD&R Firefly Bidco Limited, Other Specialty Retail, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [16],[20]             5.50% 5.50% 5.50%
Investment, interest rate (as a percent) [6],[16],[20]             10.45% 10.45% 10.45%
Investment owned, balance, principal amount [8],[16],[20]             $ 14,725    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16],[20] $ 19,782                
Investment, Identifier [Axis]: CIELO BIDCO LIMITED, Building Products, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[13],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment owned, balance, principal amount [9],[10],[12],[13],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[13],[14] $ 0                
Investment, Identifier [Axis]: CIELO BIDCO LIMITED, Building Products, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[13],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment owned, balance, principal amount [9],[10],[12],[13],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[13],[14] $ 0                
Investment, Identifier [Axis]: CIELO BIDCO LIMITED, Building Products, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [10],[13],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment owned, balance, principal amount [10],[12],[13],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [10],[13],[14] $ 0                
Investment, Identifier [Axis]: Caregiver Services, Inc., Health Care Services, Preferred Equity                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 1,080,398 1,080,398 1,080,398 1,080,398 1,080,398 1,080,398 1,080,398 [5] 1,080,398 [5] 1,080,398 [5]
Net Realized Gain (Loss) $ (288) $ 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 594 [5] 432              
Gross Additions 281 0              
Gross Reductions (875) (205)              
Fair value, ending balance $ 0 $ 227              
Investment owned, percent of net assets (as a percent) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: Carlyle Global Market Strategies, Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [13],[14] 7.50%   7.50% 7.50% 7.50% 7.50%      
Investment, interest rate (as a percent) [11],[13],[14] 11.77%   11.77% 11.77% 11.77% 11.77%      
Investment owned, balance, principal amount [12],[13],[14] $ 3,575                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13],[14] $ 3,668                
Investment, Identifier [Axis]: Centralsquare Technologies, LLC, Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 6.00% [4],[5],[20] 6.00% [4],[5],[20] 6.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (15)                
Fair value, ending balance [9],[10],[14] $ (2)                
Investment, Identifier [Axis]: Centralsquare Technologies, LLC, Application Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[14]   6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.50% [5],[20] 6.50% [5],[20] 6.50% [5],[20]
Investment, interest rate (as a percent) 7.07% [9],[11],[14]   7.07% [9],[11],[14] 7.07% [9],[11],[14] 7.07% [9],[11],[14] 7.07% [9],[11],[14] 8.10% [5],[6],[20] 8.10% [5],[6],[20] 8.10% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) 3.25% [9],[14]   3.25% [9],[14] 3.25% [9],[14] 3.25% [9],[14] 3.25% [9],[14] 3.50% [5],[20] 3.50% [5],[20] 3.50% [5],[20]
Investment owned, balance, principal amount $ 13,079 [9],[12],[14]           $ 12,830 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 12,694                
Fair value, ending balance [9],[14] $ 13,059                
Investment, Identifier [Axis]: Connect Finco SARL, Alternative Carriers, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [13],[14] 4.50%   4.50% 4.50% 4.50% 4.50%      
Investment, interest rate (as a percent) [11],[13],[14] 8.83%   8.83% 8.83% 8.83% 8.83%      
Investment owned, balance, principal amount [12],[13],[14] $ 9,948                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13],[14] $ 9,483                
Investment, Identifier [Axis]: Continental Intermodal Group LP, Oil & Gas Storage & Transportation, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 22,267,661 [9] 22,267,661 22,267,661 [9] 22,267,661 [9] 22,267,661 [9] 22,267,661 [9] 22,267,661 [5] 22,267,661 [5] 22,267,661 [5]
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 12,247 [5] 0              
Gross Additions 0 16,172              
Gross Reductions (1,781) (1,698)              
Fair value, ending balance $ 10,466 [9] $ 14,474              
Investment owned, percent of net assets (as a percent) 0.70% 1.00% 0.70% 0.70% 0.70% 0.70%      
Investment, Identifier [Axis]: Continental Intermodal Group LP, Oil & Gas Storage & Transportation, Preferred Equity                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 3,137,476 [9] 3,137,476 3,137,476 [9] 3,137,476 [9] 3,137,476 [9] 3,137,476 [9] 3,137,476 [5] 3,137,476 [5] 3,137,476 [5]
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 3,357 [5] 0              
Gross Additions 220 3,263              
Gross Reductions 0 0              
Fair value, ending balance $ 3,577 [9] $ 3,263              
Investment owned, percent of net assets (as a percent) 0.20% 0.20% 0.20% 0.20% 0.20% 0.20%      
Investment, Identifier [Axis]: Conviva Inc., Application Software, Preferred Equity                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 417,851 [9]   417,851 [9] 417,851 [9] 417,851 [9] 417,851 [9] 417,851 [5] 417,851 [5] 417,851 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 894                
Fair value, ending balance [9] $ 894                
Investment, Identifier [Axis]: CoreRx, Inc., Pharmaceuticals, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.50% [9],[14]   7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 7.50% [5],[20] 7.50% [5],[20] 7.50% [5],[20]
Investment, interest rate (as a percent) 11.80% [9],[11],[14]   11.80% [9],[11],[14] 11.80% [9],[11],[14] 11.80% [9],[11],[14] 11.80% [9],[11],[14] 12.10% [5],[6],[20] 12.10% [5],[6],[20] 12.10% [5],[6],[20]
Investment owned, balance, principal amount $ 6,494 [9],[12],[14]           $ 6,494 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 6,348                
Fair value, ending balance [9],[14] $ 6,354                
Investment, Identifier [Axis]: Coupa Holdings, LLC, Application Software First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.25%   5.25% 5.25% 5.25% 5.25%      
Investment, interest rate (as a percent) [9],[11],[14] 9.53%   9.53% 9.53% 9.53% 9.53%      
Investment owned, balance, principal amount [9],[12],[14] $ 13,025                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 13,025                
Investment, Identifier [Axis]: Coupa Holdings, LLC, Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [9],[10],[14]   5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.50% [4],[5],[20] 5.50% [4],[5],[20] 5.50% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Fair value, ending balance [9],[10],[14] 0                
Investment, Identifier [Axis]: Coupa Holdings, LLC, Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             5.50% 5.50% 5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] $ 0                
Investment, Identifier [Axis]: Coupa Holdings, LLC, Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [9],[10],[14]   5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.50% [5],[20] 5.50% [5],[20] 5.50% [5],[20]
Investment, interest rate (as a percent) [5],[6],[20]             10.75% 10.75% 10.75%
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 13,124 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 13,124                
Fair value, ending balance [9],[10],[14] 0                
Investment, Identifier [Axis]: Covetrus, Inc., Health Care Distributors, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [20]             5.00% 5.00% 5.00%
Investment, interest rate (as a percent) [6],[20]             9.60% 9.60% 9.60%
Investment owned, balance, principal amount [8],[20]             $ 10,878    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] $ 10,341                
Investment, Identifier [Axis]: Creek Parent, Inc., Life Sciences Tools & Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.25%   5.25% 5.25% 5.25% 5.25%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (112)                
Investment, Identifier [Axis]: Creek Parent, Inc.., Life Sciences Tools & Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.25%   5.25% 5.25% 5.25% 5.25%      
Investment, interest rate (as a percent) [9],[11],[14] 9.57%   9.57% 9.57% 9.57% 9.57%      
Investment owned, balance, principal amount [9],[12],[14] $ 47,865                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 47,085                
Investment, Identifier [Axis]: Crewline Buyer, Inc., Systems Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.75% [9],[10],[14]   6.75% [9],[10],[14] 6.75% [9],[10],[14] 6.75% [9],[10],[14] 6.75% [9],[10],[14] 6.75% [4],[5],[20] 6.75% [4],[5],[20] 6.75% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (31)                
Fair value, ending balance [9],[10],[14] (22)                
Investment, Identifier [Axis]: Crewline Buyer, Inc., Systems Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             6.75% 6.75% 6.75%
Investment, interest rate (as a percent) [5],[6],[20]             11.35% 11.35% 11.35%
Investment owned, balance, principal amount [5],[8],[20]             $ 20,924    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 20,627                
Investment, Identifier [Axis]: Crewline Buyer, Inc., Systems Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 6.75%   6.75% 6.75% 6.75% 6.75%      
Investment, interest rate (as a percent) [9],[11],[14] 11.08%   11.08% 11.08% 11.08% 11.08%      
Investment owned, balance, principal amount [9],[12],[14] $ 20,924                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 20,715                
Investment, Identifier [Axis]: Crewline Buyer, Inc., Systems Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 6.75%   6.75% 6.75% 6.75% 6.75%      
Investment, interest rate (as a percent) [9],[11],[14] 11.08%   11.08% 11.08% 11.08% 11.08%      
Investment owned, balance, principal amount [9],[12],[14] $ 1,420                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 1,406                
Investment, Identifier [Axis]: DTI Holdco, Inc., Research & Consulting Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [14] 4.00%   4.00% 4.00% 4.00% 4.00%      
Investment, interest rate (as a percent) [11],[14] 8.33%   8.33% 8.33% 8.33% 8.33%      
Investment owned, balance, principal amount [12],[14] $ 17,940                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [14] $ 17,759                
Investment, Identifier [Axis]: Delta Leasing SPV II LLC, Specialized Finance, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 2 [9],[13]   2 [9],[13] 2 [9],[13] 2 [9],[13] 2 [9],[13] 2 [5],[16] 2 [5],[16] 2 [5],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 2                
Fair value, ending balance [9],[13] $ 3                
Investment, Identifier [Axis]: Delta Leasing SPV II LLC, Specialized Finance, Preferred Equity                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 419 [9],[13]   419 [9],[13] 419 [9],[13] 419 [9],[13] 419 [9],[13] 419 [5],[16] 419 [5],[16] 419 [5],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 531                
Fair value, ending balance [9],[13] $ 578                
Investment, Identifier [Axis]: Delta Leasing SPV II LLC, Specialized Finance, Subordinated Debt Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 8.00% [9],[11],[13]   8.00% [9],[11],[13] 8.00% [9],[11],[13] 8.00% [9],[11],[13] 8.00% [9],[11],[13] 8.00% [4],[5],[6],[16] 8.00% [4],[5],[6],[16] 8.00% [4],[5],[6],[16]
Investment, interest rate, paid in kind (as a percent) 3.00% [9],[13]   3.00% [9],[13] 3.00% [9],[13] 3.00% [9],[13] 3.00% [9],[13] 3.00% [4],[5],[16] 3.00% [4],[5],[16] 3.00% [4],[5],[16]
Investment owned, balance, principal amount $ 12,286 [9],[12],[13]           $ 8,456 [4],[5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16] 8,456                
Fair value, ending balance [9],[13] $ 12,286                
Investment, Identifier [Axis]: Delta Leasing SPV II LLC, Specialized Finance, Subordinated Debt Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 3.00% [9],[11],[13]   3.00% [9],[11],[13] 3.00% [9],[11],[13] 3.00% [9],[11],[13] 3.00% [9],[11],[13] 3.00% [5],[6],[16] 3.00% [5],[6],[16] 3.00% [5],[6],[16]
Investment, interest rate, paid in kind (as a percent) 7.00% [9],[13]   7.00% [9],[13] 7.00% [9],[13] 7.00% [9],[13] 7.00% [9],[13] 7.00% [5],[16] 7.00% [5],[16] 7.00% [5],[16]
Investment owned, balance, principal amount $ 36,149 [9],[12],[13]           $ 34,316 [5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] 34,316                
Fair value, ending balance [9],[13] $ 36,149                
Investment, Identifier [Axis]: Delta Leasing SPV II LLC, Specialized Finance, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 31 [9],[13]   31 [9],[13] 31 [9],[13] 31 [9],[13] 31 [9],[13] 31 [5],[16] 31 [5],[16] 31 [5],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 0                
Fair value, ending balance [9],[13] $ 0                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 11.00% [9],[14],[18]   11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [5],[20] 11.00% [5],[20] 11.00% [5],[20]
Investment, interest rate, paid in kind (as a percent) [5],[20]             15.75% 15.75% 15.75%
Investment owned, balance, principal amount $ 25,623 [9],[12],[14],[18]           $ 23,660 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 21,175                
Fair value, ending balance [9],[14],[18] $ 5,125                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 10                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14],[18] 11.00%   11.00% 11.00% 11.00% 11.00%      
Investment owned, balance, principal amount [9],[12],[14],[18] $ 411                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14],[18] $ 82                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 11.00% [9],[14],[18]   11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [5],[20] 11.00% [5],[20] 11.00% [5],[20]
Investment, interest rate, paid in kind (as a percent) [5],[20]             15.75% 15.75% 15.75%
Investment owned, balance, principal amount $ 735 [9],[12],[14],[18]           $ 655 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 586                
Fair value, ending balance [9],[14],[18] $ 147                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 11.00% [9],[14],[18]   11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [5],[20] 11.00% [5],[20] 11.00% [5],[20]
Investment, interest rate, paid in kind (as a percent) [5],[20]             15.75% 15.75% 15.75%
Investment owned, balance, principal amount $ 727 [9],[12],[14],[18]           $ 647 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 579                
Fair value, ending balance [9],[14],[18] $ 145                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 11.00% [9],[14],[18]   11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [5],[20] 11.00% [5],[20] 11.00% [5],[20]
Investment, interest rate, paid in kind (as a percent) [5],[20]             15.75% 15.75% 15.75%
Investment owned, balance, principal amount $ 1,166 [9],[12],[14],[18]           $ 1,039 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 929                
Fair value, ending balance [9],[14],[18] $ 233                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 5                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 11.00% [9],[14],[18]   11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [9],[14],[18] 11.00% [5],[20] 11.00% [5],[20] 11.00% [5],[20]
Investment, interest rate, paid in kind (as a percent) [5],[20]             15.75% 15.75% 15.75%
Investment owned, balance, principal amount $ 956 [9],[12],[14],[18]           $ 852 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 762                
Fair value, ending balance [9],[14],[18] $ 191                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 6                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14],[18] 11.00%   11.00% 11.00% 11.00% 11.00%      
Investment owned, balance, principal amount [9],[12],[14],[18] $ 331                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14],[18] $ 66                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 7                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14],[18] 11.00%   11.00% 11.00% 11.00% 11.00%      
Investment owned, balance, principal amount [9],[12],[14],[18] $ 1,914                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14],[18] $ 383                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 8                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14],[18] 11.00%   11.00% 11.00% 11.00% 11.00%      
Investment owned, balance, principal amount [9],[12],[14],[18] $ 429                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14],[18] $ 86                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, First Lien Term Loan 9                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14],[18] 11.00%   11.00% 11.00% 11.00% 11.00%      
Investment owned, balance, principal amount [9],[10],[12],[14],[18] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14],[18] $ (985)                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, Subordinated Debt Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 10.00% [9],[18]   10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [5],[19] 10.00% [5],[19] 10.00% [5],[19]
Investment owned, balance, principal amount $ 782 [9],[12],[18]           $ 725 [5],[8],[19]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[19] 375                
Fair value, ending balance [9],[18] $ 0                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, Subordinated Debt Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 10.00% [9],[18]   10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [5],[19] 10.00% [5],[19] 10.00% [5],[19]
Investment owned, balance, principal amount $ 1,034 [9],[12],[18]           $ 959 [5],[8],[19]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[19] 496                
Fair value, ending balance [9],[18] $ 0                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, Subordinated Debt Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 10.00% [9],[18]   10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [5],[19] 10.00% [5],[19] 10.00% [5],[19]
Investment owned, balance, principal amount $ 1,027 [9],[12],[18]           $ 952 [5],[8],[19]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[19] 493                
Fair value, ending balance [9],[18] $ 0                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, Subordinated Debt Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 10.00% [9],[18]   10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [5],[19] 10.00% [5],[19] 10.00% [5],[19]
Investment owned, balance, principal amount $ 1,810 [9],[12],[18]           $ 1,679 [5],[8],[19]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[19] 869                
Fair value, ending balance [9],[18] $ 0                
Investment, Identifier [Axis]: Dialyze Holdings, LLC, Health Care Equipment, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 6,397,254 [9]   6,397,254 [9] 6,397,254 [9] 6,397,254 [9] 6,397,254 [9] 6,397,254 [5] 6,397,254 [5] 6,397,254 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 0                
Fair value, ending balance [9] $ 0                
Investment, Identifier [Axis]: Digital.AI Software Holdings, Inc., Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[10],[14]   6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [4],[5],[20] 6.00% [4],[5],[20] 6.00% [4],[5],[20]
Investment, interest rate (as a percent) [9],[10],[11],[14] 10.30%   10.30% 10.30% 10.30% 10.30%      
Investment owned, balance, principal amount $ 1,007 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (36)                
Fair value, ending balance [9],[10],[14] $ 902                
Investment, Identifier [Axis]: Digital.AI Software Holdings, Inc., Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[14]   6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [5],[20] 6.00% [5],[20] 6.00% [5],[20]
Investment, interest rate (as a percent) 10.30% [9],[11],[14]   10.30% [9],[11],[14] 10.30% [9],[11],[14] 10.30% [9],[11],[14] 10.30% [9],[11],[14] 10.60% [5],[6],[20] 10.60% [5],[6],[20] 10.60% [5],[6],[20]
Investment owned, balance, principal amount $ 54,031 [9],[12],[14]           $ 54,454 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 54,127                
Fair value, ending balance [9],[14] $ 53,085                
Investment, Identifier [Axis]: Digital.AI Software Holdings, Inc., Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[14]   6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [5],[20] 6.00% [5],[20] 6.00% [5],[20]
Investment, interest rate (as a percent) 10.30% [9],[11],[14]   10.30% [9],[11],[14] 10.30% [9],[11],[14] 10.30% [9],[11],[14] 10.30% [9],[11],[14] 10.60% [5],[6],[20] 10.60% [5],[6],[20] 10.60% [5],[6],[20]
Investment owned, balance, principal amount $ 2,916 [9],[12],[14]           $ 2,939 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 2,921                
Fair value, ending balance [9],[14] $ 2,865                
Investment, Identifier [Axis]: DirecTV Financing, LLC, Cable & Satellite, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [14] 5.50%   5.50% 5.50% 5.50% 5.50%      
Investment, interest rate (as a percent) [11],[14] 9.83%   9.83% 9.83% 9.83% 9.83%      
Investment owned, balance, principal amount [12],[14] $ 13,953                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [14] $ 13,357                
Investment, Identifier [Axis]: DirecTV Financing, LLC, Cable & Satellite, First Rate Bond                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) [11] 10.00%   10.00% 10.00% 10.00% 10.00%      
Investment owned, balance, principal amount [12] $ 14,203                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance $ 13,798                
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 30,031 [9] 30,031 30,031 [9] 30,031 [9] 30,031 [9] 30,031 [9] 30,031 [5] 30,031 [5] 30,031 [5]
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 [5] 2,711              
Gross Additions 0 0              
Gross Reductions 0 (2,711)              
Fair value, ending balance $ 0 [9] $ 0              
Investment owned, percent of net assets (as a percent) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent)   10.48%         9.75% [5],[6],[20] 9.75% [5],[6],[20] 9.75% [5],[6],[20]
Investment owned, balance, principal amount $ 0 $ 5,574         $ 5,574 [5],[8],[20]    
Net Realized Gain (Loss) 0 0              
Amount of Interest, Fees or Dividends Credited in Income 0 445              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 4,546 [5],[20] 5,574              
Gross Additions 1,028 0              
Gross Reductions (5,574) (352)              
Fair value, ending balance $ 0 $ 5,222              
Investment owned, percent of net assets (as a percent) 0.00% 0.30% 0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount $ 0                
Net Realized Gain (Loss) 1                
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 11,360                
Gross Additions 2,570                
Gross Reductions (13,930)                
Fair value, ending balance $ 0                
Investment owned, percent of net assets (as a percent) 0.00%   0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount $ 0                
Net Realized Gain (Loss) 12                
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 (1,028)                
Gross Additions 1,028                
Gross Reductions 0                
Fair value, ending balance $ 0                
Investment owned, percent of net assets (as a percent) 0.00%   0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[14],[18] 5.00% 5.00% [9],[14],[18] 5.00% [9],[14],[18] 5.00% [9],[14],[18] 5.00% [9],[14],[18]      
Investment, interest rate (as a percent)   10.48%              
Investment owned, balance, principal amount $ 6,967 [9],[12],[14],[18] $ 13,963              
Net Realized Gain (Loss) 0 0              
Amount of Interest, Fees or Dividends Credited in Income 0 1,159              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 0 14,068              
Gross Additions 5,351 0              
Gross Reductions 0 (987)              
Fair value, ending balance $ 5,351 [9],[14],[18] $ 13,081              
Investment owned, percent of net assets (as a percent) 0.40% 0.90% 0.40% 0.40% 0.40% 0.40%      
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.50% [9],[14],[18] 5.00% 6.50% [9],[14],[18] 6.50% [9],[14],[18] 6.50% [9],[14],[18] 6.50% [9],[14],[18]      
Investment, interest rate (as a percent)   10.48%              
Investment owned, balance, principal amount $ 12,465 [9],[12],[14],[18] $ 0              
Net Realized Gain (Loss) 0 0              
Amount of Interest, Fees or Dividends Credited in Income 0 69              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 0 2,090              
Gross Additions 13,182 0              
Gross Reductions (13,182) (2,090)              
Fair value, ending balance $ 0 [9],[14],[18] $ 0              
Investment owned, percent of net assets (as a percent) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             5.00% 5.00% 5.00%
Investment, interest rate (as a percent) [5],[6],[20]             9.74% 9.74% 9.74%
Investment owned, balance, principal amount [5],[8],[20]             $ 13,928    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 11,360                
Investment, Identifier [Axis]: Dominion Diagnostics, LLC, Health Care Services, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             5.00% 5.00% 5.00%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] $ (1,028)                
Investment, Identifier [Axis]: Draken International, LLC, Aerospace & Defense, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 5.50%   5.50% 5.50% 5.50% 5.50%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 9.71%   9.71% 9.71% 9.71% 9.71%      
Investment owned, balance, principal amount | € [9],[12],[13],[14]     € 15,711            
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 21,129                
Investment, Identifier [Axis]: Draken International, LLC, Aerospace & Defense, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 5.50%   5.50% 5.50% 5.50% 5.50%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 9.82%   9.82% 9.82% 9.82% 9.82%      
Investment owned, balance, principal amount [9],[12],[13],[14] $ 4,992                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 4,900                
Investment, Identifier [Axis]: Draken International, LLC, Aerospace & Defense, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[13],[14] 5.50%   5.50% 5.50% 5.50% 5.50%      
Investment owned, balance, principal amount [9],[10],[12],[13],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[13],[14] $ (55)                
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 [9]   12,500 [9] 12,500 [9] 12,500 [9] 12,500 [9] 12,500 [5] 12,500 [5] 12,500 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 0                
Fair value, ending balance [9] $ 9,680                
Investment, Identifier [Axis]: EOS Fitness Opco Holdings, LLC, Leisure Facilities, Preferred Equity                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 488 [9]   488 [9] 488 [9] 488 [9] 488 [9] 488 [5] 488 [5] 488 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 1,345                
Fair value, ending balance [9] 2,092                
Investment, Identifier [Axis]: Eagleview Technology Corporation, Application Software, Second Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             7.50% 7.50% 7.50%
Investment, interest rate (as a percent) [5],[6],[20]             12.25% 12.25% 12.25%
Investment owned, balance, principal amount [5],[8],[20]             $ 8,974    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 8,121                
Investment, Identifier [Axis]: Engineering Research and Consulting LLC, Construction & Engineering, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [14]   5.00% [14] 5.00% [14] 5.00% [14] 5.00% [14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 9.29% [11],[14]   9.29% [11],[14] 9.29% [11],[14] 9.29% [11],[14] 9.29% [11],[14] 10.06% [5],[6],[20] 10.06% [5],[6],[20] 10.06% [5],[6],[20]
Investment owned, balance, principal amount $ 11,873 [12],[14]           $ 11,933 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 11,858                
Fair value, ending balance [14] $ 11,636                
Investment, Identifier [Axis]: Enverus Holdings, Inc., Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [4],[5],[20] 5.50% [4],[5],[20] 5.50% [4],[5],[20]
Investment, interest rate (as a percent) 9.82% [9],[10],[11],[14]   9.82% [9],[10],[11],[14] 9.82% [9],[10],[11],[14] 9.82% [9],[10],[11],[14] 9.82% [9],[10],[11],[14] 10.35% [4],[5],[6],[20] 10.35% [4],[5],[6],[20] 10.35% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 137 [9],[10],[12],[14]           $ 121 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 121                
Fair value, ending balance [9],[10],[14] $ 137                
Investment, Identifier [Axis]: Enverus Holdings, Inc., Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[14]   5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [5],[20] 5.50% [5],[20] 5.50% [5],[20]
Investment, interest rate (as a percent) 9.83% [9],[11],[14]   9.83% [9],[11],[14] 9.83% [9],[11],[14] 9.83% [9],[11],[14] 9.83% [9],[11],[14] 10.35% [5],[6],[20] 10.35% [5],[6],[20] 10.35% [5],[6],[20]
Investment owned, balance, principal amount $ 25,323 [9],[12],[14]           $ 24,741 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 24,741                
Fair value, ending balance [9],[14] $ 25,323                
Investment, Identifier [Axis]: Enverus Holdings, Inc., Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [4],[5],[20] 5.50% [4],[5],[20] 5.50% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Fair value, ending balance [9],[10],[14] $ 0                
Investment, Identifier [Axis]: Establishment Labs Holdings Inc., Health Care Technology, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 9.00% [9],[11],[13]   9.00% [9],[11],[13] 9.00% [9],[11],[13] 9.00% [9],[11],[13] 9.00% [9],[11],[13] 9.00% [5],[6],[16] 9.00% [5],[6],[16] 9.00% [5],[6],[16]
Investment owned, balance, principal amount $ 1,834 [9],[12],[13]           $ 1,834 [5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] 1,834                
Fair value, ending balance [9],[13] $ 1,834                
Investment, Identifier [Axis]: Establishment Labs Holdings Inc., Health Care Technology, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 10.00% [9],[11],[13]   10.00% [9],[11],[13] 10.00% [9],[11],[13] 10.00% [9],[11],[13] 10.00% [9],[11],[13] 9.00% [4],[5],[6],[16] 9.00% [4],[5],[6],[16] 9.00% [4],[5],[6],[16]
Investment owned, balance, principal amount $ 1,692 [9],[12],[13]           $ 0 [4],[5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16] 0                
Fair value, ending balance [9],[13] $ 1,726                
Investment, Identifier [Axis]: Establishment Labs Holdings Inc., Health Care Technology, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 10.00% [9],[10],[11],[13]   10.00% [9],[10],[11],[13] 10.00% [9],[10],[11],[13] 10.00% [9],[10],[11],[13] 10.00% [9],[10],[11],[13] 9.00% [4],[5],[6],[16] 9.00% [4],[5],[6],[16] 9.00% [4],[5],[6],[16]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[13]           $ 0 [4],[5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16] 0                
Fair value, ending balance [9],[10],[13] $ 0                
Investment, Identifier [Axis]: Establishment Labs Holdings Inc., Health Care Technology, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 9.00% [9],[11],[13]   9.00% [9],[11],[13] 9.00% [9],[11],[13] 9.00% [9],[11],[13] 9.00% [9],[11],[13] 9.00% [5],[6],[16] 9.00% [5],[6],[16] 9.00% [5],[6],[16]
Investment owned, balance, principal amount $ 11,454 [9],[12],[13]           $ 11,454 [5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] 11,454                
Fair value, ending balance [9],[13] $ 11,454                
Investment, Identifier [Axis]: Everbridge, Inc., Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[10],[14]   5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [4],[5],[20] 5.00% [4],[5],[20] 5.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (9)                
Fair value, ending balance [9],[10],[14] $ (8)                
Investment, Identifier [Axis]: Everbridge, Inc., Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[14]   5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 9.29% [9],[11],[14]   9.29% [9],[11],[14] 9.29% [9],[11],[14] 9.29% [9],[11],[14] 9.29% [9],[11],[14] 10.33% [5],[6],[20] 10.33% [5],[6],[20] 10.33% [5],[6],[20]
Investment owned, balance, principal amount $ 19,914 [9],[12],[14]           $ 20,014 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 19,922                
Fair value, ending balance [9],[14] $ 19,830                
Investment, Identifier [Axis]: Everbridge, Inc., Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[10],[14]   5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [4],[5],[20] 5.00% [4],[5],[20] 5.00% [4],[5],[20]
Investment, interest rate (as a percent) 9.29% [9],[10],[11],[14]   9.29% [9],[10],[11],[14] 9.29% [9],[10],[11],[14] 9.29% [9],[10],[11],[14] 9.29% [9],[10],[11],[14] 10.30% [4],[5],[6],[20] 10.30% [4],[5],[6],[20] 10.30% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 1,951 [9],[10],[12],[14]           $ 1,961 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 1,950                
Fair value, ending balance [9],[10],[14] $ 1,930                
Investment, Identifier [Axis]: Evergreen IX Borrower 2023, LLC, Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.75% [9],[10],[14]   4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [4],[5],[20] 4.75% [4],[5],[20] 4.75% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (14)                
Fair value, ending balance [9],[10],[14] $ 0                
Investment, Identifier [Axis]: Evergreen IX Borrower 2023, LLC, Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.75% [9],[14]   4.75% [9],[14] 4.75% [9],[14] 4.75% [9],[14] 4.75% [9],[14] 4.75% [5],[20] 4.75% [5],[20] 4.75% [5],[20]
Investment, interest rate (as a percent) 9.05% [9],[11],[14]   9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.35% [5],[6],[20] 9.35% [5],[6],[20] 9.35% [5],[6],[20]
Investment owned, balance, principal amount $ 14,515 [9],[12],[14]           $ 14,625 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 14,501                
Fair value, ending balance [9],[14] $ 14,515                
Investment, Identifier [Axis]: Evergreen IX Borrower 2023, LLC, Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.75% [9],[14]   4.75% [9],[14] 4.75% [9],[14] 4.75% [9],[14] 4.75% [9],[14] 4.75% [5],[20] 4.75% [5],[20] 4.75% [5],[20]
Investment, interest rate (as a percent) 9.05% [9],[11],[14]   9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.35% [5],[6],[20] 9.35% [5],[6],[20] 9.35% [5],[6],[20]
Investment owned, balance, principal amount $ 3,665 [9],[12],[14]           $ 3,692 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 3,661                
Fair value, ending balance [9],[14] $ 3,665                
Investment, Identifier [Axis]: Eyesouth Eye Care Holdco LLC, Health Care Services, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 1,206 [9]   1,206 [9] 1,206 [9] 1,206 [9] 1,206 [9] 1,206 [5],[24] 1,206 [5],[24] 1,206 [5],[24]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[24] $ 1,131                
Fair value, ending balance [9] $ 1,265                
Investment, Identifier [Axis]: Eyesouth Eye Care Holdco LLC, Health Care Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[14]   5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [5],[20] 5.50% [5],[20] 5.50% [5],[20]
Investment, interest rate (as a percent) 9.92% [9],[11],[14]   9.92% [9],[11],[14] 9.92% [9],[11],[14] 9.92% [9],[11],[14] 9.92% [9],[11],[14] 10.80% [5],[6],[20] 10.80% [5],[6],[20] 10.80% [5],[6],[20]
Investment owned, balance, principal amount $ 4,335 [9],[12],[14]           $ 4,368 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 4,285                
Fair value, ending balance [9],[14] $ 4,275                
Investment, Identifier [Axis]: Eyesouth Eye Care Holdco LLC, Health Care Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [4],[5],[20] 5.50% [4],[5],[20] 5.50% [4],[5],[20]
Investment, interest rate (as a percent) [9],[10],[11],[14] 9.92%   9.92% 9.92% 9.92% 9.92%      
Investment owned, balance, principal amount $ 501 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (125)                
Fair value, ending balance [9],[10],[14] $ 409                
Investment, Identifier [Axis]: F&M Buyer LLC, Systems Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (10)                
Investment, Identifier [Axis]: F&M Buyer LLC, Systems Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment, interest rate (as a percent) [9],[11],[14] 9.05%   9.05% 9.05% 9.05% 9.05%      
Investment owned, balance, principal amount [9],[12],[14] $ 6,703                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 6,636                
Investment, Identifier [Axis]: F&M Buyer LLC, Systems Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (11)                
Investment, Identifier [Axis]: Fairbridge Strategic Capital Funding LLC, Real Estate Operating Companies, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 9.00% [9],[11]   9.00% [9],[11] 9.00% [9],[11] 9.00% [9],[11] 9.00% [9],[11] 9.00% [5],[6] 9.00% [5],[6] 9.00% [5],[6]
Investment owned, balance, principal amount $ 32,250 [9],[12]           $ 48,920 [5],[8]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] 48,920                
Fair value, ending balance [9] $ 31,605                
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 [9],[13],[23]   3,750 [9],[13],[23] 3,750 [9],[13],[23] 3,750 [9],[13],[23] 3,750 [9],[13],[23] 3,750 [5],[16],[25] 3,750 [5],[16],[25] 3,750 [5],[16],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[25] $ 4                
Fair value, ending balance [9],[13],[23] $ 0                
Investment, Identifier [Axis]: Finastra USA, Inc., Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.25% [9],[10],[13],[14]   7.25% [9],[10],[13],[14] 7.25% [9],[10],[13],[14] 7.25% [9],[10],[13],[14] 7.25% [9],[10],[13],[14] 7.25% [4],[5],[16],[20] 7.25% [4],[5],[16],[20] 7.25% [4],[5],[16],[20]
Investment, interest rate (as a percent) 11.57% [9],[10],[11],[13],[14]   11.57% [9],[10],[11],[13],[14] 11.57% [9],[10],[11],[13],[14] 11.57% [9],[10],[11],[13],[14] 11.57% [9],[10],[11],[13],[14] 12.18% [4],[5],[6],[16],[20] 12.18% [4],[5],[6],[16],[20] 12.18% [4],[5],[6],[16],[20]
Investment owned, balance, principal amount $ 242 [9],[10],[12],[13],[14]           $ 564 [4],[5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] 547                
Fair value, ending balance [9],[10],[13],[14] $ 242                
Investment, Identifier [Axis]: Finastra USA, Inc., Application Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.25% [9],[13],[14]   7.25% [9],[13],[14] 7.25% [9],[13],[14] 7.25% [9],[13],[14] 7.25% [9],[13],[14] 7.25% [5],[16],[20] 7.25% [5],[16],[20] 7.25% [5],[16],[20]
Investment, interest rate (as a percent) 11.43% [9],[11],[13],[14]   11.43% [9],[11],[13],[14] 11.43% [9],[11],[13],[14] 11.43% [9],[11],[13],[14] 11.43% [9],[11],[13],[14] 12.18% [5],[6],[16],[20] 12.18% [5],[6],[16],[20] 12.18% [5],[6],[16],[20]
Investment owned, balance, principal amount $ 11,595 [9],[12],[13],[14]           $ 11,683 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 11,521                
Fair value, ending balance [9],[13],[14] 11,595                
Investment, Identifier [Axis]: Finthrive Software Intermediate Holdings, Inc., Health Care Technology, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             4.00% 4.00% 4.00%
Investment, interest rate (as a percent) [5],[6],[20]             8.96% 8.96% 8.96%
Investment owned, balance, principal amount [5],[8],[20]             $ 4,291    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 3,862                
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 (as a percent) [5],[19],[20]             6.75% 6.75% 6.75%
Investment owned, balance, principal amount [5],[8],[19],[20]             $ 31,074    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[19],[20] $ 23,616                
Investment, Identifier [Axis]: First Star Speir Aviation Limited, Airlines, Equity Interest                  
Schedule of Investments [Line Items]                  
Investment owned, ownership (as a percent)   100.00%              
Net Realized Gain (Loss)   $ 786              
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              
Investment owned, percent of net assets (as a percent)   0.00%              
Investment, Identifier [Axis]: Fortress Biotech, Inc., Biotechnology, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 31,246 [9],[13]   31,246 [9],[13] 31,246 [9],[13] 31,246 [9],[13] 31,246 [9],[13] 27,801 [5],[16] 27,801 [5],[16] 27,801 [5],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 13                
Fair value, ending balance [9],[13] $ 16                
Investment, Identifier [Axis]: Fortress Credit BSL Limited, Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [13],[14] 8.19%   8.19% 8.19% 8.19% 8.19%      
Investment, interest rate (as a percent) [11],[13],[14] 12.46%   12.46% 12.46% 12.46% 12.46%      
Investment owned, balance, principal amount [12],[13],[14] $ 1,550                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13],[14] $ 1,533                
Investment, Identifier [Axis]: GLICK JV Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.50%   4.50% 4.50% 4.50% 4.50%      
Investment, Identifier [Axis]: Galileo Parent, Inc., Aerospace & Defense, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[10],[14]   5.75% [9],[10],[14] 5.75% [9],[10],[14] 5.75% [9],[10],[14] 5.75% [9],[10],[14] 7.25% [4],[5],[20] 7.25% [4],[5],[20] 7.25% [4],[5],[20]
Investment, interest rate (as a percent) 10.05% [9],[10],[11],[14]   10.05% [9],[10],[11],[14] 10.05% [9],[10],[11],[14] 10.05% [9],[10],[11],[14] 10.05% [9],[10],[11],[14] 11.85% [4],[5],[6],[20] 11.85% [4],[5],[6],[20] 11.85% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 3,990 [9],[10],[12],[14]           $ 2,536 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 2,536                
Fair value, ending balance [9],[10],[14] $ 3,951                
Investment, Identifier [Axis]: Galileo Parent, Inc., Aerospace & Defense, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[14]   5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 7.25% [5],[20] 7.25% [5],[20] 7.25% [5],[20]
Investment, interest rate (as a percent) 10.05% [9],[11],[14]   10.05% [9],[11],[14] 10.05% [9],[11],[14] 10.05% [9],[11],[14] 10.05% [9],[11],[14] 11.85% [5],[6],[20] 11.85% [5],[6],[20] 11.85% [5],[6],[20]
Investment owned, balance, principal amount $ 38,351 [9],[12],[14]           $ 23,536 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 23,536                
Fair value, ending balance [9],[14] $ 38,102                
Investment, Identifier [Axis]: Grand River Aseptic Manufacturing, Inc., Health Care Equipment, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (25)                
Investment, Identifier [Axis]: Grand River Aseptic Manufacturing, Inc., Health Care Equipment, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [9],[11],[14] 9.31%   9.31% 9.31% 9.31% 9.31%      
Investment owned, balance, principal amount [9],[12],[14] $ 8,432                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 8,352                
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 (as a percent) 8.00% [9],[10],[14]   8.00% [9],[10],[14] 8.00% [9],[10],[14] 8.00% [9],[10],[14] 8.00% [9],[10],[14] 8.00% [4],[5],[20] 8.00% [4],[5],[20] 8.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (35)                
Fair value, ending balance [9],[10],[14] $ (32)                
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 (as a percent) 8.00% [9],[14]   8.00% [9],[14] 8.00% [9],[14] 8.00% [9],[14] 8.00% [9],[14] 8.00% [5],[20] 8.00% [5],[20] 8.00% [5],[20]
Investment, interest rate (as a percent) 12.43% [9],[11],[14]   12.43% [9],[11],[14] 12.43% [9],[11],[14] 12.43% [9],[11],[14] 12.43% [9],[11],[14] 12.95% [5],[6],[20] 12.95% [5],[6],[20] 12.95% [5],[6],[20]
Investment owned, balance, principal amount $ 3,524 [9],[12],[14]           $ 3,524 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 3,454                
Fair value, ending balance [9],[14] $ 3,461                
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 (as a percent) 8.00% [9],[14]   8.00% [9],[14] 8.00% [9],[14] 8.00% [9],[14] 8.00% [9],[14] 8.00% [4],[5],[20] 8.00% [4],[5],[20] 8.00% [4],[5],[20]
Investment, interest rate (as a percent) 12.43% [9],[11],[14]   12.43% [9],[11],[14] 12.43% [9],[11],[14] 12.43% [9],[11],[14] 12.43% [9],[11],[14] 12.95% [4],[5],[6],[20] 12.95% [4],[5],[6],[20] 12.95% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 17,136 [9],[12],[14]           $ 17,268 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 16,923                
Fair value, ending balance [9],[14] 16,828                
Investment, Identifier [Axis]: HPS Loan Management 10-2016, Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [16],[20]             6.67% 6.67% 6.67%
Investment, interest rate (as a percent) [6],[16],[20]             11.95% 11.95% 11.95%
Investment owned, balance, principal amount [8],[16],[20]             $ 2,250    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16],[20] $ 2,264                
Investment, Identifier [Axis]: Harbor Purchaser Inc., Education Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [14]   5.25% [14] 5.25% [14] 5.25% [14] 5.25% [14] 5.25% [20] 5.25% [20] 5.25% [20]
Investment, interest rate (as a percent) 9.63% [11],[14]   9.63% [11],[14] 9.63% [11],[14] 9.63% [11],[14] 9.63% [11],[14] 10.20% [6],[20] 10.20% [6],[20] 10.20% [6],[20]
Investment owned, balance, principal amount $ 8,408 [12],[14]           $ 8,473 [8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] 8,263                
Fair value, ending balance [14] $ 8,265                
Investment, Identifier [Axis]: Harrow, Inc., Pharmaceuticals, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.50% [9],[13],[14]   6.50% [9],[13],[14] 6.50% [9],[13],[14] 6.50% [9],[13],[14] 6.50% [9],[13],[14] 6.50% [4],[5],[16],[20] 6.50% [4],[5],[16],[20] 6.50% [4],[5],[16],[20]
Investment, interest rate (as a percent) [9],[11],[13],[14] 10.95%   10.95% 10.95% 10.95% 10.95%      
Investment owned, balance, principal amount $ 3,438 [9],[12],[13],[14]           $ 0 [4],[5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] 52                
Fair value, ending balance [9],[13],[14] $ 3,489                
Investment, Identifier [Axis]: Harrow, Inc., Pharmaceuticals, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.50% [9],[13],[14]   6.50% [9],[13],[14] 6.50% [9],[13],[14] 6.50% [9],[13],[14] 6.50% [9],[13],[14] 6.50% [5],[16],[20] 6.50% [5],[16],[20] 6.50% [5],[16],[20]
Investment, interest rate (as a percent) 10.95% [9],[11],[13],[14]   10.95% [9],[11],[13],[14] 10.95% [9],[11],[13],[14] 10.95% [9],[11],[13],[14] 10.95% [9],[11],[13],[14] 11.25% [5],[6],[16],[20] 11.25% [5],[6],[16],[20] 11.25% [5],[6],[16],[20]
Investment owned, balance, principal amount $ 1,432 [9],[12],[13],[14]           $ 1,432 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 1,454                
Fair value, ending balance [9],[13],[14] $ 1,454                
Investment, Identifier [Axis]: Harrow, Inc., Pharmaceuticals, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.50% [9],[13],[14]   6.50% [9],[13],[14] 6.50% [9],[13],[14] 6.50% [9],[13],[14] 6.50% [9],[13],[14] 6.50% [5],[16],[20] 6.50% [5],[16],[20] 6.50% [5],[16],[20]
Investment, interest rate (as a percent) 10.95% [9],[11],[13],[14]   10.95% [9],[11],[13],[14] 10.95% [9],[11],[13],[14] 10.95% [9],[11],[13],[14] 10.95% [9],[11],[13],[14] 11.25% [5],[6],[16],[20] 11.25% [5],[6],[16],[20] 11.25% [5],[6],[16],[20]
Investment owned, balance, principal amount $ 7,448 [9],[12],[13],[14]           $ 7,448 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 7,560                
Fair value, ending balance [9],[13],[14] $ 7,560                
Investment, Identifier [Axis]: IAMGOLD Corporation, Gold, Second Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 8.25% [9],[13],[14]   8.25% [9],[13],[14] 8.25% [9],[13],[14] 8.25% [9],[13],[14] 8.25% [9],[13],[14] 8.25% [5],[16],[20] 8.25% [5],[16],[20] 8.25% [5],[16],[20]
Investment, interest rate (as a percent) 12.56% [9],[11],[13],[14]   12.56% [9],[11],[13],[14] 12.56% [9],[11],[13],[14] 12.56% [9],[11],[13],[14] 12.56% [9],[11],[13],[14] 13.37% [5],[6],[16],[20] 13.37% [5],[6],[16],[20] 13.37% [5],[6],[16],[20]
Investment owned, balance, principal amount $ 23,975 [9],[12],[13],[14]           $ 23,975 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 25,054                
Fair value, ending balance [9],[13],[14] $ 24,867                
Investment, Identifier [Axis]: INW Manufacturing, LLC, Personal Care Products, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [14]   5.75% [14] 5.75% [14] 5.75% [14] 5.75% [14] 5.75% [20] 5.75% [20] 5.75% [20]
Investment, interest rate (as a percent) 10.31% [11],[14]   10.31% [11],[14] 10.31% [11],[14] 10.31% [11],[14] 10.31% [11],[14] 10.62% [6],[20] 10.62% [6],[20] 10.62% [6],[20]
Investment owned, balance, principal amount $ 40,219 [12],[14]           $ 42,075 [8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] 35,343                
Fair value, ending balance [14] $ 36,763                
Investment, Identifier [Axis]: IPC Corp., Application Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.50% [9],[14]   6.50% [9],[14] 6.50% [9],[14] 6.50% [9],[14] 6.50% [9],[14] 6.50% [5],[20] 6.50% [5],[20] 6.50% [5],[20]
Investment, interest rate (as a percent) 9.93% [9],[11],[14]   9.93% [9],[11],[14] 9.93% [9],[11],[14] 9.93% [9],[11],[14] 9.93% [9],[11],[14] 11.97% [5],[6],[20] 11.97% [5],[6],[20] 11.97% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) [9],[14] 1.00%   1.00% 1.00% 1.00% 1.00%      
Investment owned, balance, principal amount $ 36,262 [9],[12],[14]           $ 36,029 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 35,668                
Fair value, ending balance [9],[14] $ 35,265                
Investment, Identifier [Axis]: Icefall Parent, Inc., Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[10],[14]   5.75% [9],[10],[14] 5.75% [9],[10],[14] 5.75% [9],[10],[14] 5.75% [9],[10],[14] 6.50% [4],[5],[20] 6.50% [4],[5],[20] 6.50% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (7)                
Fair value, ending balance [9],[10],[14] $ 0                
Investment, Identifier [Axis]: Icefall Parent, Inc., Application Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[14]   5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 6.50% [5],[20] 6.50% [5],[20] 6.50% [5],[20]
Investment, interest rate (as a percent) 10.03% [9],[11],[14]   10.03% [9],[11],[14] 10.03% [9],[11],[14] 10.03% [9],[11],[14] 10.03% [9],[11],[14] 11.35% [5],[6],[20] 11.35% [5],[6],[20] 11.35% [5],[6],[20]
Investment owned, balance, principal amount $ 10,446 [9],[12],[14]           $ 10,446 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 10,372                
Fair value, ending balance [9],[14] 10,446                
Investment, Identifier [Axis]: Innocoll Pharmaceuticals Limited, Health Care Technology, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [5],[16]             112,990 112,990 112,990
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 0                
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, Insurance Brokers, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[10],[14]   5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [4],[5],[20] 5.00% [4],[5],[20] 5.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (26)                
Fair value, ending balance [9],[10],[14] $ (5)                
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, Insurance Brokers, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[14]   5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 9.33% [9],[11],[14]   9.33% [9],[11],[14] 9.33% [9],[11],[14] 9.33% [9],[11],[14] 9.33% [9],[11],[14] 10.08% [5],[6],[20] 10.08% [5],[6],[20] 10.08% [5],[6],[20]
Investment owned, balance, principal amount $ 26,120 [9],[12],[14]           $ 19,559 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 19,363                
Fair value, ending balance [9],[14] $ 26,068                
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, Insurance Brokers, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[10],[14]   5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [4],[5],[20] 5.00% [4],[5],[20] 5.00% [4],[5],[20]
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (66)                
Fair value, ending balance [9],[10],[14] $ (14)                
Investment, Identifier [Axis]: Inventus Power, Inc., Electrical Components & Equipment, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.50% [9],[10],[14]   7.50% [9],[10],[14] 7.50% [9],[10],[14] 7.50% [9],[10],[14] 7.50% [9],[10],[14] 7.50% [4],[5],[20] 7.50% [4],[5],[20] 7.50% [4],[5],[20]
Investment, interest rate (as a percent) [9],[10],[11],[14] 11.93%   11.93% 11.93% 11.93% 11.93%      
Investment owned, balance, principal amount $ 632 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (86)                
Fair value, ending balance [9],[10],[14] $ 575                
Investment, Identifier [Axis]: Inventus Power, Inc., Electrical Components & Equipment, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.50% [9],[14]   7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 7.50% [5],[20] 7.50% [5],[20] 7.50% [5],[20]
Investment, interest rate (as a percent) 11.94% [9],[11],[14]   11.94% [9],[11],[14] 11.94% [9],[11],[14] 11.94% [9],[11],[14] 11.94% [9],[11],[14] 12.46% [5],[6],[20] 12.46% [5],[6],[20] 12.46% [5],[6],[20]
Investment owned, balance, principal amount $ 32,828 [9],[12],[14]           $ 33,079 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 32,332                
Fair value, ending balance [9],[14] 32,336                
Investment, Identifier [Axis]: JN Bidco LLC, Health Care Technology, Common Stock                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] 9,886                
Fair value, ending balance [9] 18,982                
Investment, Identifier [Axis]: JP Morgan Prime Money Market Fund, Institutional Shares                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 34,597                
Fair value, ending balance $ 19,679                
Investment, Identifier [Axis]: KKR Financial CLO Ltd, Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [13],[14] 7.10%   7.10% 7.10% 7.10% 7.10%      
Investment, interest rate (as a percent) [11],[13],[14] 11.36%   11.36% 11.36% 11.36% 11.36%      
Investment owned, balance, principal amount [12],[13],[14] $ 2,000                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13],[14] $ 2,006                
Investment, Identifier [Axis]: Kaseya Inc., Systems Software, Second Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [11],[14] 9.33%   9.33% 9.33% 9.33% 9.33%      
Investment owned, balance, principal amount [12],[14] $ 10,876                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [14] $ 10,915                
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 4.25%   4.25% 4.25% 4.25% 4.25%      
Investment, interest rate (as a percent) [9],[10],[11],[14] 11.75%   11.75% 11.75% 11.75% 11.75%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 2,911                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] 2,554                
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Revolver 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             4.00% 4.00% 4.00%
Investment, interest rate (as a percent) [4],[5],[6],[20]             12.50% 12.50% 12.50%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 1,259    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 1,216                
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Revolver 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             4.00% 4.00% 4.00%
Investment, interest rate (as a percent) [4],[5],[6],[20]             12.00% 12.00% 12.00%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 926    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] $ 894                
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [9],[14]   5.25% [9],[14] 5.25% [9],[14] 5.25% [9],[14] 5.25% [9],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 9.65% [9],[11],[14]   9.65% [9],[11],[14] 9.65% [9],[11],[14] 9.65% [9],[11],[14] 9.65% [9],[11],[14] 9.95% [5],[6],[20] 9.95% [5],[6],[20] 9.95% [5],[6],[20]
Investment owned, balance, principal amount $ 37,445 [9],[12],[14]           $ 37,635 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 37,123                
Fair value, ending balance [9],[14] $ 35,838                
Investment, Identifier [Axis]: Kings Buyer, LLC, Environmental & Facilities Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [9],[14]   5.25% [9],[14] 5.25% [9],[14] 5.25% [9],[14] 5.25% [9],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 9.65% [9],[11],[14]   9.65% [9],[11],[14] 9.65% [9],[11],[14] 9.65% [9],[11],[14] 9.65% [9],[11],[14] 10.68% [5],[6],[20] 10.68% [5],[6],[20] 10.68% [5],[6],[20]
Investment owned, balance, principal amount $ 16,467 [9],[12],[14]           $ 16,552 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 16,327                
Fair value, ending balance [9],[14] $ 15,760                
Investment, Identifier [Axis]: Kite Midco II Inc., Research & Consulting Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [9],[11],[14] 9.27%   9.27% 9.27% 9.27% 9.27%      
Investment owned, balance, principal amount [9],[12],[14] $ 9,644                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 9,503                
Investment, Identifier [Axis]: Kite Midco II Inc., Research & Consulting Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (17)                
Investment, Identifier [Axis]: LABL, Inc., Office Services & Supplies, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [14]   5.00% [14] 5.00% [14] 5.00% [14] 5.00% [14] 5.00% [20] 5.00% [20] 5.00% [20]
Investment, interest rate (as a percent) 9.43% [11],[14]   9.43% [11],[14] 9.43% [11],[14] 9.43% [11],[14] 9.43% [11],[14] 9.95% [6],[20] 9.95% [6],[20] 9.95% [6],[20]
Investment owned, balance, principal amount $ 12,876 [12],[14]           $ 19,351 [8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] 18,953                
Fair value, ending balance [14] $ 11,645                
Investment, Identifier [Axis]: LDS Buyer, LLC, Air Freight & Logistics, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (24)                
Investment, Identifier [Axis]: LDS Buyer, LLC, Air Freight & Logistics, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [9],[11],[14] 9.33%   9.33% 9.33% 9.33% 9.33%      
Investment owned, balance, principal amount [9],[12],[14] $ 13,869                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 13,708                
Investment, Identifier [Axis]: LDS Buyer, LLC, Air Freight & Logistics, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (16)                
Investment, Identifier [Axis]: LSL Holdco, LLC, Health Care Distributors, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[10],[14]   6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [4],[5],[20] 6.00% [4],[5],[20] 6.00% [4],[5],[20]
Investment, interest rate (as a percent) 10.43% [9],[10],[11],[14]   10.43% [9],[10],[11],[14] 10.43% [9],[10],[11],[14] 10.43% [9],[10],[11],[14] 10.43% [9],[10],[11],[14] 10.95% [4],[5],[6],[20] 10.95% [4],[5],[6],[20] 10.95% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 2,226 [9],[10],[12],[14]           $ 2,014 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 1,849                
Fair value, ending balance [9],[10],[14] $ 2,107                
Investment, Identifier [Axis]: LSL Holdco, LLC, Health Care Distributors, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[14]   6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [5],[20] 6.00% [5],[20] 6.00% [5],[20]
Investment, interest rate (as a percent) 10.43% [9],[11],[14]   10.43% [9],[11],[14] 10.43% [9],[11],[14] 10.43% [9],[11],[14] 10.43% [9],[11],[14] 10.95% [5],[6],[20] 10.95% [5],[6],[20] 10.95% [5],[6],[20]
Investment owned, balance, principal amount $ 2,687 [9],[12],[14]           $ 2,708 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 2,539                
Fair value, ending balance [9],[14] $ 2,566                
Investment, Identifier [Axis]: LSL Holdco, LLC, Health Care Distributors, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[14]   6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [5],[20] 6.00% [5],[20] 6.00% [5],[20]
Investment, interest rate (as a percent) 10.43% [9],[11],[14]   10.43% [9],[11],[14] 10.43% [9],[11],[14] 10.43% [9],[11],[14] 10.43% [9],[11],[14] 10.95% [5],[6],[20] 10.95% [5],[6],[20] 10.95% [5],[6],[20]
Investment owned, balance, principal amount $ 23,077 [9],[12],[14]           $ 23,256 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 21,802                
Fair value, ending balance [9],[14] 22,038                
Investment, Identifier [Axis]: Latam Airlines Group S.A., Passenger Airlines, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [16],[20]             9.50% 9.50% 9.50%
Investment, interest rate (as a percent) [6],[16],[20]             14.95% 14.95% 14.95%
Investment owned, balance, principal amount [8],[16],[20]             $ 26,156    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16],[20] $ 26,556                
Investment, Identifier [Axis]: Learfield Communications, LLC, Movies & Entertainment, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.50% [14]   4.50% [14] 4.50% [14] 4.50% [14] 4.50% [14] 5.50% [20] 5.50% [20] 5.50% [20]
Investment, interest rate (as a percent) 8.83% [11],[14]   8.83% [11],[14] 8.83% [11],[14] 8.83% [11],[14] 8.83% [11],[14] 10.35% [6],[20] 10.35% [6],[20] 10.35% [6],[20]
Investment owned, balance, principal amount $ 23,841 [12],[14]           $ 30,856 [8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] 30,863                
Fair value, ending balance [14] $ 24,050                
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, Specialized Consumer Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[10],[14]   5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [9],[10],[14] 5.00% [4],[5],[20] 5.00% [4],[5],[20] 5.00% [4],[5],[20]
Investment, interest rate (as a percent) [9],[10],[11],[14] 9.32%   9.32% 9.32% 9.32% 9.32%      
Investment owned, balance, principal amount $ 1,240 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (60)                
Fair value, ending balance [9],[10],[14] $ 1,188                
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, Specialized Consumer Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[14]   5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 7.07% [9],[11],[14]   7.07% [9],[11],[14] 7.07% [9],[11],[14] 7.07% [9],[11],[14] 7.07% [9],[11],[14] 10.13% [5],[6],[20] 10.13% [5],[6],[20] 10.13% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) [9],[14] 2.75%   2.75% 2.75% 2.75% 2.75%      
Investment owned, balance, principal amount $ 26,779 [9],[12],[14]           $ 26,358 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 25,847                
Fair value, ending balance [9],[14] $ 26,324                
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, Specialized Consumer Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.00% [4],[5],[20] 5.00% [4],[5],[20] 5.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (15)                
Fair value, ending balance [9],[10],[14] $ 0                
Investment, Identifier [Axis]: Lightbox Intermediate, L.P., Real Estate Services, First Lien Rvolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.50%   5.50% 5.50% 5.50% 5.50%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (18)                
Investment, Identifier [Axis]: Lightbox Intermediate, L.P., Real Estate Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[14]   5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 9.74% [9],[11],[14]   9.74% [9],[11],[14] 9.74% [9],[11],[14] 9.74% [9],[11],[14] 9.74% [9],[11],[14] 9.96% [5],[6],[20] 9.96% [5],[6],[20] 9.96% [5],[6],[20]
Investment owned, balance, principal amount $ 19,607 [9],[12],[14]           $ 55,873 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 54,197                
Fair value, ending balance [9],[14] $ 19,332                
Investment, Identifier [Axis]: Liquid Environmental Solutions Corporation, Environmental & Facilities Services, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 559 [9]   559 [9] 559 [9] 559 [9] 559 [9] 559 [5] 559 [5] 559 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 64                
Fair value, ending balance [9] $ 0                
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 (as a percent) 8.50% [9],[14]   8.50% [9],[14] 8.50% [9],[14] 8.50% [9],[14] 8.50% [9],[14] 8.50% [5],[20] 8.50% [5],[20] 8.50% [5],[20]
Investment, interest rate (as a percent) 12.88% [9],[11],[14]   12.88% [9],[11],[14] 12.88% [9],[11],[14] 12.88% [9],[11],[14] 12.88% [9],[11],[14] 13.20% [5],[6],[20] 13.20% [5],[6],[20] 13.20% [5],[6],[20]
Investment owned, balance, principal amount $ 3,167 [9],[12],[14]           $ 3,167 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 2,993                
Fair value, ending balance [9],[14] $ 2,993                
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 (as a percent) 8.50% [9],[14]   8.50% [9],[14] 8.50% [9],[14] 8.50% [9],[14] 8.50% [9],[14] 8.50% [5],[20] 8.50% [5],[20] 8.50% [5],[20]
Investment, interest rate (as a percent) 12.88% [9],[11],[14]   12.88% [9],[11],[14] 12.88% [9],[11],[14] 12.88% [9],[11],[14] 12.88% [9],[11],[14] 13.20% [5],[6],[20] 13.20% [5],[6],[20] 13.20% [5],[6],[20]
Investment owned, balance, principal amount $ 5,822 [9],[12],[14]           $ 5,822 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 5,502                
Fair value, ending balance [9],[14] $ 5,502                
Investment, Identifier [Axis]: Liquid Environmental Solutions Corporation, Environmental & Facilities Services, Second Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 8.50%   8.50% 8.50% 8.50% 8.50%      
Investment, interest rate (as a percent) [9],[11],[14] 12.88%   12.88% 12.88% 12.88% 12.88%      
Investment owned, balance, principal amount [9],[12],[14] $ 504                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 477                
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC, Diversified Support Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[10],[14]   6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [4],[5],[20] 6.00% [4],[5],[20] 6.00% [4],[5],[20]
Investment, interest rate (as a percent) [9],[10],[11],[14] 10.43%   10.43% 10.43% 10.43% 10.43%      
Investment owned, balance, principal amount $ 714 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (24)                
Fair value, ending balance [9],[10],[14] $ 688                
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 (as a percent) 6.00% [9],[14]   6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [5],[20] 6.00% [5],[20] 6.00% [5],[20]
Investment, interest rate (as a percent) 10.43% [9],[11],[14]   10.43% [9],[11],[14] 10.43% [9],[11],[14] 10.43% [9],[11],[14] 10.43% [9],[11],[14] 11.40% [5],[6],[20] 11.40% [5],[6],[20] 11.40% [5],[6],[20]
Investment owned, balance, principal amount $ 2,584 [9],[12],[14]           $ 2,604 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 2,568                
Fair value, ending balance [9],[14] $ 2,545                
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 (as a percent) 6.00% [9],[14]   6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [5],[20] 6.00% [5],[20] 6.00% [5],[20]
Investment, interest rate (as a percent) 10.43% [9],[11],[14]   10.43% [9],[11],[14] 10.43% [9],[11],[14] 10.43% [9],[11],[14] 10.43% [9],[11],[14] 11.40% [5],[6],[20] 11.40% [5],[6],[20] 11.40% [5],[6],[20]
Investment owned, balance, principal amount $ 7,224 [9],[12],[14]           $ 7,224 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 7,125                
Fair value, ending balance [9],[14] $ 7,116                
Investment, Identifier [Axis]: MRI Software LLC, Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.75% [9],[10],[14]   4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [4],[5],[20] 4.75% [4],[5],[20] 4.75% [4],[5],[20]
Investment, interest rate (as a percent) [9],[10],[11],[14] 9.05%   9.05% 9.05% 9.05% 9.05%      
Investment owned, balance, principal amount $ 253 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (44)                
Fair value, ending balance [9],[10],[14] $ 222                
Investment, Identifier [Axis]: MRI Software LLC, Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.75% [9],[14]   4.75% [9],[14] 4.75% [9],[14] 4.75% [9],[14] 4.75% [9],[14] 4.75% [5],[20] 4.75% [5],[20] 4.75% [5],[20]
Investment, interest rate (as a percent) 9.05% [9],[11],[14]   9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.35% [5],[6],[20] 9.35% [5],[6],[20] 9.35% [5],[6],[20]
Investment owned, balance, principal amount $ 40,951 [9],[12],[14]           $ 33,831 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 33,503                
Fair value, ending balance [9],[14] $ 40,677                
Investment, Identifier [Axis]: MRI Software LLC, Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.75% [9],[14]   4.75% [9],[14] 4.75% [9],[14] 4.75% [9],[14] 4.75% [9],[14] 4.75% [5],[20] 4.75% [5],[20] 4.75% [5],[20]
Investment, interest rate (as a percent) 9.05% [9],[11],[14]   9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.05% [9],[11],[14] 9.35% [5],[6],[20] 9.35% [5],[6],[20] 9.35% [5],[6],[20]
Investment owned, balance, principal amount $ 13,721 [9],[12],[14]           $ 13,829 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 13,695                
Fair value, ending balance [9],[14] $ 13,629                
Investment, Identifier [Axis]: MRI Software LLC, Application Software, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.75% [9],[10],[14]   4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [9],[10],[14] 4.75% [5],[20] 4.75% [5],[20] 4.75% [5],[20]
Investment, interest rate (as a percent) 9.05% [9],[10],[11],[14]   9.05% [9],[10],[11],[14] 9.05% [9],[10],[11],[14] 9.05% [9],[10],[11],[14] 9.05% [9],[10],[11],[14] 9.35% [5],[6],[20] 9.35% [5],[6],[20] 9.35% [5],[6],[20]
Investment owned, balance, principal amount $ 1,967 [9],[10],[12],[14]           $ 6,652 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 6,588                
Fair value, ending balance [9],[10],[14] 1,951                
Investment, Identifier [Axis]: MRI Software LLC, Application Software, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             4.75% 4.75% 4.75%
Investment, interest rate (as a percent) [4],[5],[6],[20]             9.35% 9.35% 9.35%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 792    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 760                
Investment, Identifier [Axis]: Marinus Pharmaceuticals, Inc., Pharmaceuticals, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) [5],[6],[16]             11.50% 11.50% 11.50%
Investment owned, balance, principal amount [5],[8],[16]             $ 8,139    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] 7,773                
Investment, Identifier [Axis]: Marinus Pharmaceuticals, Inc., Pharmaceuticals, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) [5],[6],[16]             11.50% 11.50% 11.50%
Investment owned, balance, principal amount [5],[8],[16]             $ 3,855    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] 3,682                
Investment, Identifier [Axis]: Marinus Pharmaceuticals, Inc., Pharmaceuticals, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) [5],[6],[16]             11.50% 11.50% 11.50%
Investment owned, balance, principal amount [5],[8],[16]             $ 4,070    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 3,886                
Investment, Identifier [Axis]: Mesoblast, Inc., Biotechnology, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 9.75% [9],[11],[13]   9.75% [9],[11],[13] 9.75% [9],[11],[13] 9.75% [9],[11],[13] 9.75% [9],[11],[13] 9.75% [5],[6],[16] 9.75% [5],[6],[16] 9.75% [5],[6],[16]
Investment owned, balance, principal amount $ 6,511 [9],[12],[13]           $ 7,660 [5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] 7,373                
Fair value, ending balance [9],[13] $ 6,576                
Investment, Identifier [Axis]: Mesoblast, Inc., Biotechnology, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [9],[13] 129,939   129,939 129,939 129,939 129,939      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13] $ 546                
Investment, Identifier [Axis]: Mesoblast, Inc., Biotechnology, Warrants 1                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [5],[16]             33,409 33,409 33,409
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] 154                
Investment, Identifier [Axis]: Mesoblast, Inc., Biotechnology, Warrants 2                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [5],[16]             129,939 129,939 129,939
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 416                
Investment, Identifier [Axis]: Mindbody, Inc., Internet Services & Infrastructure, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.00% [9],[10],[14]   7.00% [9],[10],[14] 7.00% [9],[10],[14] 7.00% [9],[10],[14] 7.00% [9],[10],[14] 7.00% [4],[5],[20] 7.00% [4],[5],[20] 7.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (56)                
Fair value, ending balance [9],[10],[14] $ 0                
Investment, Identifier [Axis]: Mindbody, Inc., Internet Services & Infrastructure, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.00% [9],[14]   7.00% [9],[14] 7.00% [9],[14] 7.00% [9],[14] 7.00% [9],[14] 7.00% [5],[20] 7.00% [5],[20] 7.00% [5],[20]
Investment, interest rate (as a percent) 11.29% [9],[11],[14]   11.29% [9],[11],[14] 11.29% [9],[11],[14] 11.29% [9],[11],[14] 11.29% [9],[11],[14] 12.40% [5],[6],[20] 12.40% [5],[6],[20] 12.40% [5],[6],[20]
Investment owned, balance, principal amount $ 39,221 [9],[12],[14]           $ 51,356 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 50,806                
Fair value, ending balance [9],[14] $ 39,221                
Investment, Identifier [Axis]: Mindbody, Inc., Internet Services & Infrastructure, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.00% [9],[14]   7.00% [9],[14] 7.00% [9],[14] 7.00% [9],[14] 7.00% [9],[14] 7.00% [5],[20] 7.00% [5],[20] 7.00% [5],[20]
Investment, interest rate (as a percent) 11.29% [9],[11],[14]   11.29% [9],[11],[14] 11.29% [9],[11],[14] 11.29% [9],[11],[14] 11.29% [9],[11],[14] 12.40% [5],[6],[20] 12.40% [5],[6],[20] 12.40% [5],[6],[20]
Investment owned, balance, principal amount $ 1,752 [9],[12],[14]           $ 2,294 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 2,269                
Fair value, ending balance [9],[14] $ 1,752                
Investment, Identifier [Axis]: Minotaur Acquisition, Inc., Financial Exchanges & Data, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[10],[13],[14]   5.00% [9],[10],[13],[14] 5.00% [9],[10],[13],[14] 5.00% [9],[10],[13],[14] 5.00% [9],[10],[13],[14] 5.00% [4],[5],[20] 5.00% [4],[5],[20] 5.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[13],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (12)                
Fair value, ending balance [9],[10],[13],[14] $ (4)                
Investment, Identifier [Axis]: Minotaur Acquisition, Inc., Financial Exchanges & Data, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[13],[14]   5.00% [9],[13],[14] 5.00% [9],[13],[14] 5.00% [9],[13],[14] 5.00% [9],[13],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 9.33% [9],[11],[13],[14]   9.33% [9],[11],[13],[14] 9.33% [9],[11],[13],[14] 9.33% [9],[11],[13],[14] 9.33% [9],[11],[13],[14] 9.85% [5],[6],[20] 9.85% [5],[6],[20] 9.85% [5],[6],[20]
Investment owned, balance, principal amount $ 6,983 [9],[12],[13],[14]           $ 7,056 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 6,932                
Fair value, ending balance [9],[13],[14] $ 6,948                
Investment, Identifier [Axis]: Minotaur Acquisition, Inc., Financial Exchanges & Data, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[10],[13],[14]   5.00% [9],[10],[13],[14] 5.00% [9],[10],[13],[14] 5.00% [9],[10],[13],[14] 5.00% [9],[10],[13],[14] 5.00% [4],[5],[20] 5.00% [4],[5],[20] 5.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[13],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (11)                
Fair value, ending balance [9],[10],[13],[14] $ (6)                
Investment, Identifier [Axis]: Minotaur Acquisition, Inc., Financial Exchanges & Data, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.00% [9],[13],[14]   5.00% [9],[13],[14] 5.00% [9],[13],[14] 5.00% [9],[13],[14] 5.00% [9],[13],[14] 5.00% [5],[20] 5.00% [5],[20] 5.00% [5],[20]
Investment, interest rate (as a percent) 9.33% [9],[11],[13],[14]   9.33% [9],[11],[13],[14] 9.33% [9],[11],[13],[14] 9.33% [9],[11],[13],[14] 9.33% [9],[11],[13],[14] 9.85% [5],[6],[20] 9.85% [5],[6],[20] 9.85% [5],[6],[20]
Investment owned, balance, principal amount $ 1,149 [9],[12],[13],[14]           $ 1,176 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 1,156                
Fair value, ending balance [9],[13],[14] $ 1,143                
Investment, Identifier [Axis]: Modena Buyer LLC, Application Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.50% [14]   4.50% [14] 4.50% [14] 4.50% [14] 4.50% [14] 4.50% [20] 4.50% [20] 4.50% [20]
Investment, interest rate (as a percent) 8.78% [11],[14]   8.78% [11],[14] 8.78% [11],[14] 8.78% [11],[14] 8.78% [11],[14] 9.10% [6],[20] 9.10% [6],[20] 9.10% [6],[20]
Investment owned, balance, principal amount $ 23,694 [12],[14]           $ 27,705 [8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] 26,588                
Fair value, ending balance [14] $ 22,880                
Investment, Identifier [Axis]: Monotype Imaging Holdings Inc., Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [4],[5],[20] 5.50% [4],[5],[20] 5.50% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Fair value, ending balance [9],[10],[14] $ 0                
Investment, Identifier [Axis]: Monotype Imaging Holdings Inc., Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[14]   5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [5],[20] 5.50% [5],[20] 5.50% [5],[20]
Investment, interest rate (as a percent) 9.80% [9],[11],[14]   9.80% [9],[11],[14] 9.80% [9],[11],[14] 9.80% [9],[11],[14] 9.80% [9],[11],[14] 10.56% [5],[6],[20] 10.56% [5],[6],[20] 10.56% [5],[6],[20]
Investment owned, balance, principal amount $ 38,038 [9],[12],[14]           $ 38,326 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 38,326                
Fair value, ending balance [9],[14] $ 38,038                
Investment, Identifier [Axis]: Monotype Imaging Holdings Inc., Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [4],[5],[20] 5.50% [4],[5],[20] 5.50% [4],[5],[20]
Investment, interest rate (as a percent) [9],[10],[11],[14] 9.80%   9.80% 9.80% 9.80% 9.80%      
Investment owned, balance, principal amount $ 824 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Fair value, ending balance [9],[10],[14] $ 824                
Investment, Identifier [Axis]: Mosaic Companies, LLC, Home Improvement Retail, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 8.25% [9],[14],[18]   8.25% [9],[14],[18] 8.25% [9],[14],[18] 8.25% [9],[14],[18] 8.25% [9],[14],[18] 8.25% [5],[20] 8.25% [5],[20] 8.25% [5],[20]
Investment, interest rate (as a percent) [5],[6],[20]             10.58% 10.58% 10.58%
Investment, interest rate, paid in kind (as a percent) [5],[20]             3.25% 3.25% 3.25%
Investment owned, balance, principal amount $ 26,503 [9],[12],[14],[18]           $ 50,077 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 48,775                
Fair value, ending balance [9],[14],[18] 5,314                
Investment, Identifier [Axis]: NN, Inc., Industrial Machinery & Supplies & Components, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[16],[20]             8.88% 8.88% 8.88%
Investment, interest rate (as a percent) [5],[6],[16],[20]             11.82% 11.82% 11.82%
Investment, interest rate, paid in kind (as a percent) [5],[16],[20]             2.00% 2.00% 2.00%
Investment owned, balance, principal amount [5],[8],[16],[20]             $ 56,701    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] $ 55,737                
Investment, Identifier [Axis]: NN, Inc., Industrial Machinery & Supplies & Components, Warrants 1                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 487,870 [13]   487,870 [13] 487,870 [13] 487,870 [13] 487,870 [13] 487,870 [16] 487,870 [16] 487,870 [16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16] $ 1,898                
Fair value, ending balance [13] $ 1,020                
Investment, Identifier [Axis]: NN, Inc., Industrial Machinery & Supplies & Components, Warrants 2                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 239,590 [13]   239,590 [13] 239,590 [13] 239,590 [13] 239,590 [13] 239,590 [16] 239,590 [16] 239,590 [16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16] $ 932                
Fair value, ending balance [13] $ 501                
Investment, Identifier [Axis]: Nellson Nutraceutical, LLC, Packaged Foods & Meats, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[13],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment, interest rate (as a percent) [9],[10],[11],[13],[14] 12.25%   12.25% 12.25% 12.25% 12.25%      
Investment owned, balance, principal amount [9],[10],[12],[13],[14] $ 513                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[13],[14] $ 485                
Investment, Identifier [Axis]: Nellson Nutraceutical, LLC, Packaged Foods & Meats, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 5.75%   5.75% 5.75% 5.75% 5.75%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 10.05%   10.05% 10.05% 10.05% 10.05%      
Investment owned, balance, principal amount [9],[12],[13],[14] $ 2,866                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 2,826                
Investment, Identifier [Axis]: Nellson Nutraceutical, LLC, Packaged Foods & Meats, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 5.75%   5.75% 5.75% 5.75% 5.75%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 10.03%   10.03% 10.03% 10.03% 10.03%      
Investment owned, balance, principal amount [9],[12],[13],[14] $ 9,655                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 9,520                
Investment, Identifier [Axis]: Nellson Nutraceutical, LLC, Packaged Foods & Meats, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[13],[14] 5.75%   5.75% 5.75% 5.75% 5.75%      
Investment owned, balance, principal amount [9],[10],[12],[13],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[13],[14] (5)                
Investment, Identifier [Axis]: NeuAG, LLC, Fertilizers & Agricultural Chemicals, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             2.25% 2.25% 2.25%
Investment, interest rate (as a percent) [5],[6],[20]             6.85% 6.85% 6.85%
Investment owned, balance, principal amount [5],[8],[20]             $ 55,783    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 54,668                
Investment, Identifier [Axis]: Next Holdco, LLC, Health Care Technology, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [9],[10],[14]   5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [9],[10],[14] 6.00% [4],[5],[20] 6.00% [4],[5],[20] 6.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Fair value, ending balance [9],[10],[14] $ (5)                
Investment, Identifier [Axis]: Next Holdco, LLC, Health Care Technology, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             6.00% 6.00% 6.00%
Investment, Identifier [Axis]: Next Holdco, LLC, Health Care Technology, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [9],[14]   5.25% [9],[14] 5.25% [9],[14] 5.25% [9],[14] 5.25% [9],[14] 6.00% [5],[20] 6.00% [5],[20] 6.00% [5],[20]
Investment, interest rate (as a percent) 9.55% [9],[11],[14]   9.55% [9],[11],[14] 9.55% [9],[11],[14] 9.55% [9],[11],[14] 9.55% [9],[11],[14] 11.06% [5],[6],[20] 11.06% [5],[6],[20] 11.06% [5],[6],[20]
Investment owned, balance, principal amount $ 19,745 [9],[12],[14]           $ 19,895 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 19,895                
Fair value, ending balance [9],[14] $ 19,698                
Investment, Identifier [Axis]: Next Holdco, LLC, Health Care Technology, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.25%   5.25% 5.25% 5.25% 5.25%      
Investment, interest rate (as a percent) [9],[11],[14] 9.55%   9.55% 9.55% 9.55% 9.55%      
Investment owned, balance, principal amount $ 7,785 [9],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Fair value, ending balance [9],[14] $ 7,766                
Investment, Identifier [Axis]: Next Holdco, LLC, Health Care Technology, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.25%   5.25% 5.25% 5.25% 5.25%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (12)                
Investment, Identifier [Axis]: Northwoods Capital 25 Ltd, Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.40% [13],[14]   7.40% [13],[14] 7.40% [13],[14] 7.40% [13],[14] 7.40% [13],[14] 7.40% [16],[20] 7.40% [16],[20] 7.40% [16],[20]
Investment, interest rate (as a percent) 11.67% [11],[13],[14]   11.67% [11],[13],[14] 11.67% [11],[13],[14] 11.67% [11],[13],[14] 11.67% [11],[13],[14] 12.68% [6],[16],[20] 12.68% [6],[16],[20] 12.68% [6],[16],[20]
Investment owned, balance, principal amount $ 700 [12],[13],[14]           $ 700 [8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16],[20] 681                
Fair value, ending balance [13],[14] $ 695                
Investment, Identifier [Axis]: OCSI Glick JV LLC, Multi-Sector Holdings, Membership Interest                  
Schedule of Investments [Line Items]                  
Investment owned, ownership (as a percent) 87.50% [10],[13],[26],[27] 87.50% 87.50% [10],[13],[26],[27] 87.50% [10],[13],[26],[27] 87.50% [10],[13],[26],[27] 87.50% [10],[13],[26],[27] 87.50% [4],[16],[28],[29] 87.50% [4],[16],[28],[29] 87.50% [4],[16],[28],[29]
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 [4],[16],[28],[29] 0              
Gross Additions 0 0              
Gross Reductions 0 0              
Fair value, ending balance $ 0 [10],[13],[26],[27] $ 0              
Investment owned, percent of net assets (as a percent) 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 (as a percent) 4.50% [9],[10],[13],[14],[26] 4.50% 4.50% [9],[10],[13],[14],[26] 4.50% [9],[10],[13],[14],[26] 4.50% [9],[10],[13],[14],[26] 4.50% [9],[10],[13],[14],[26] 4.50% [4],[5],[16],[20],[28] 4.50% [4],[5],[16],[20],[28] 4.50% [4],[5],[16],[20],[28]
Investment, interest rate (as a percent) 8.93% [9],[10],[11],[13],[14],[26] 9.94% 8.93% [9],[10],[11],[13],[14],[26] 8.93% [9],[10],[11],[13],[14],[26] 8.93% [9],[10],[11],[13],[14],[26] 8.93% [9],[10],[11],[13],[14],[26] 9.95% [4],[5],[6],[16],[20],[28] 9.95% [4],[5],[6],[16],[20],[28] 9.95% [4],[5],[6],[16],[20],[28]
Investment owned, balance, principal amount $ 58,349 [9],[10],[12],[13],[14],[26] $ 58,349         $ 58,349 [4],[5],[8],[16],[20],[28]    
Net Realized Gain (Loss) 0 0              
Amount of Interest, Fees or Dividends Credited in Income 5,098 5,395              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 48,896 [4],[5],[16],[20],[28] 50,017              
Gross Additions 1,065 978              
Gross Reductions (2,897) (1,109)              
Fair value, ending balance $ 47,064 [9],[10],[13],[14],[26] $ 49,886              
Investment owned, percent of net assets (as a percent) 3.20% 3.30% 3.20% 3.20% 3.20% 3.20%      
Investment, Identifier [Axis]: OTG Management, LLC, Airport Services, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 2,613,034 [9]   2,613,034 [9] 2,613,034 [9] 2,613,034 [9] 2,613,034 [9] 2,613,034 [5] 2,613,034 [5] 2,613,034 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 13,562                
Fair value, ending balance [9] $ 10,008                
Investment, Identifier [Axis]: OTG Management, LLC, Airport Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 8.50% [9],[14]   8.50% [9],[14] 8.50% [9],[14] 8.50% [9],[14] 8.50% [9],[14] 9.50% [5],[20] 9.50% [5],[20] 9.50% [5],[20]
Investment, interest rate, paid in kind (as a percent) 12.81% [9],[14]   12.81% [9],[14] 12.81% [9],[14] 12.81% [9],[14] 12.81% [9],[14] 14.62% [5],[20] 14.62% [5],[20] 14.62% [5],[20]
Investment owned, balance, principal amount $ 13,394 [9],[12],[14]           $ 12,070 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 12,070                
Fair value, ending balance [9],[14] $ 13,394                
Investment, Identifier [Axis]: Optimizely North America Inc., Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[13],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount [9],[10],[12],[13],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[13],[14] $ (17)                
Investment, Identifier [Axis]: Optimizely North America Inc., Application Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 9.33%   9.33% 9.33% 9.33% 9.33%      
Investment owned, balance, principal amount [9],[12],[13],[14] $ 11,358                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 11,244                
Investment, Identifier [Axis]: Optimizely Sweden Holdings AB, Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 5.25%   5.25% 5.25% 5.25% 5.25%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 7.23%   7.23% 7.23% 7.23% 7.23%      
Investment owned, balance, principal amount | € [9],[12],[13],[14]     € 4,058            
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 4,716                
Investment, Identifier [Axis]: Optimizely Sweden Holdings AB, Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[13],[14] 5.50%   5.50% 5.50% 5.50% 5.50%      
Investment, interest rate (as a percent) [9],[11],[13],[14] 9.72%   9.72% 9.72% 9.72% 9.72%      
Investment owned, balance, principal amount | £ [9],[12],[13],[14]       £ 1,353          
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13],[14] $ 1,835                
Investment, Identifier [Axis]: Oranje Holdco, Inc., Systems Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.75% [9],[10],[14]   7.75% [9],[10],[14] 7.75% [9],[10],[14] 7.75% [9],[10],[14] 7.75% [9],[10],[14] 7.50% [4],[5],[20] 7.50% [4],[5],[20] 7.50% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Fair value, ending balance [9],[10],[14] $ 0                
Investment, Identifier [Axis]: Oranje Holdco, Inc., Systems Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.75% [9],[14]   7.75% [9],[14] 7.75% [9],[14] 7.75% [9],[14] 7.75% [9],[14] 7.50% [5],[20] 7.50% [5],[20] 7.50% [5],[20]
Investment, interest rate (as a percent) 12.03% [9],[11],[14]   12.03% [9],[11],[14] 12.03% [9],[11],[14] 12.03% [9],[11],[14] 12.03% [9],[11],[14] 12.75% [5],[6],[20] 12.75% [5],[6],[20] 12.75% [5],[6],[20]
Investment owned, balance, principal amount $ 15,231 [9],[12],[14]           $ 15,231 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 15,231                
Fair value, ending balance [9],[14] $ 15,231                
Investment, Identifier [Axis]: Oranje Holdco, Inc., Systems Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.25% [9],[14]   7.25% [9],[14] 7.25% [9],[14] 7.25% [9],[14] 7.25% [9],[14] 7.25% [5],[20] 7.25% [5],[20] 7.25% [5],[20]
Investment, interest rate (as a percent) 11.55% [9],[11],[14]   11.55% [9],[11],[14] 11.55% [9],[11],[14] 11.55% [9],[11],[14] 11.55% [9],[11],[14] 12.50% [5],[6],[20] 12.50% [5],[6],[20] 12.50% [5],[6],[20]
Investment owned, balance, principal amount $ 4,047 [9],[12],[14]           $ 4,047 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 3,986                
Fair value, ending balance [9],[14] 4,047                
Investment, Identifier [Axis]: Other cash accounts                  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 43,946                
Fair value, ending balance $ 60,120                
Investment, Identifier [Axis]: PAI Financing Merger Sub LLC, Pharmaceuticals, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (78)                
Investment, Identifier [Axis]: PAI Financing Merger Sub LLC, Pharmaceuticals, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment, interest rate (as a percent) [9],[11],[14] 9.05%   9.05% 9.05% 9.05% 9.05%      
Investment owned, balance, principal amount [9],[12],[14] $ 24,559                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 24,191                
Investment, Identifier [Axis]: PPW Aero Buyer, Inc., Aerospace & Defense, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [4],[5],[20] 5.50% [4],[5],[20] 5.50% [4],[5],[20]
Investment, interest rate (as a percent) 13.00% [9],[10],[11],[14]   13.00% [9],[10],[11],[14] 13.00% [9],[10],[11],[14] 13.00% [9],[10],[11],[14] 13.00% [9],[10],[11],[14] 11.35% [4],[5],[6],[20] 11.35% [4],[5],[6],[20] 11.35% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 274 [9],[10],[12],[14]           $ 753 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 753                
Fair value, ending balance [9],[10],[14] $ 274                
Investment, Identifier [Axis]: PPW Aero Buyer, Inc., Aerospace & Defense, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.50% [9],[14]   6.50% [9],[14] 6.50% [9],[14] 6.50% [9],[14] 6.50% [9],[14] 6.50% [5],[20] 6.50% [5],[20] 6.50% [5],[20]
Investment, interest rate (as a percent) 10.83% [9],[11],[14]   10.83% [9],[11],[14] 10.83% [9],[11],[14] 10.83% [9],[11],[14] 10.83% [9],[11],[14] 11.35% [5],[6],[20] 11.35% [5],[6],[20] 11.35% [5],[6],[20]
Investment owned, balance, principal amount $ 10,704 [9],[12],[14]           $ 10,786 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 10,786                
Fair value, ending balance [9],[14] $ 10,704                
Investment, Identifier [Axis]: PPW Aero Buyer, Inc., Aerospace & Defense, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[14]   5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [5],[20] 5.50% [5],[20] 5.50% [5],[20]
Investment, interest rate (as a percent) 9.80% [9],[11],[14]   9.80% [9],[11],[14] 9.80% [9],[11],[14] 9.80% [9],[11],[14] 9.80% [9],[11],[14] 10.10% [5],[6],[20] 10.10% [5],[6],[20] 10.10% [5],[6],[20]
Investment owned, balance, principal amount $ 9,285 [9],[12],[14]           $ 5,088 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 5,019                
Fair value, ending balance [9],[14] $ 9,261                
Investment, Identifier [Axis]: PPW Aero Buyer, Inc., Aerospace & Defense, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [4],[5],[20] 5.50% [4],[5],[20] 5.50% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (128)                
Fair value, ending balance [9],[10],[14] $ (13)                
Investment, Identifier [Axis]: PPW Aero Buyer, Inc., Aerospace & Defense, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [9],[11],[14] 9.30%   9.30% 9.30% 9.30% 9.30%      
Investment owned, balance, principal amount [9],[12],[14] $ 3,944                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 3,909                
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 [9]   100,000 [9] 100,000 [9] 100,000 [9] 100,000 [9] 100,000 [5] 100,000 [5] 100,000 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 415                
Fair value, ending balance [9] 245                
Investment, Identifier [Axis]: PRGX Global, Inc., Data Processing & Outsourced Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             6.50% 6.50% 6.50%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Investment, Identifier [Axis]: PRGX Global, Inc., Data Processing & Outsourced Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             6.50% 6.50% 6.50%
Investment, interest rate (as a percent) [5],[6],[20]             11.90% 11.90% 11.90%
Investment owned, balance, principal amount [5],[8],[20]             $ 26,176    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 26,176                
Investment, Identifier [Axis]: Park Blue CLO Ltd, Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [13],[14] 7.09%   7.09% 7.09% 7.09% 7.09%      
Investment, interest rate (as a percent) [11],[13],[14] 11.36%   11.36% 11.36% 11.36% 11.36%      
Investment owned, balance, principal amount [12],[13],[14] $ 2,750                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13],[14] $ 2,729                
Investment, Identifier [Axis]: Paulus Holdings Public Limited Company, Health Care Technology, Preferred Equity                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [9],[13] 57,324   57,324 57,324 57,324 57,324      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13] $ 1,768                
Investment, Identifier [Axis]: Paulus Holdings Public Limited Company, Health Care Technology, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [9],[13] 12,592   12,592 12,592 12,592 12,592      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[13] $ 388                
Investment, Identifier [Axis]: Performance Health Holdings, Inc., Health Care Distributors, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             5.75% 5.75% 5.75%
Investment, interest rate (as a percent) [5],[6],[20]             11.11% 11.11% 11.11%
Investment owned, balance, principal amount [5],[8],[20]             $ 22,375    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 22,375                
Investment, Identifier [Axis]: PetVet Care Centers, LLC, Health Care Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[10],[14]   6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [4],[5],[20] 6.00% [4],[5],[20] 6.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (175)                
Fair value, ending balance [9],[10],[14] $ (398)                
Investment, Identifier [Axis]: PetVet Care Centers, LLC, Health Care Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[14]   6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [9],[14] 6.00% [5],[20] 6.00% [5],[20] 6.00% [5],[20]
Investment, interest rate (as a percent) 10.33% [9],[11],[14]   10.33% [9],[11],[14] 10.33% [9],[11],[14] 10.33% [9],[11],[14] 10.33% [9],[11],[14] 10.85% [5],[6],[20] 10.85% [5],[6],[20] 10.85% [5],[6],[20]
Investment owned, balance, principal amount $ 51,849 [9],[12],[14]           $ 52,244 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 50,912                
Fair value, ending balance [9],[14] $ 48,842                
Investment, Identifier [Axis]: PetVet Care Centers, LLC, Health Care Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [9],[10],[14]   6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [9],[10],[14] 6.00% [4],[5],[20] 6.00% [4],[5],[20] 6.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (106)                
Fair value, ending balance [9],[10],[14] $ (330)                
Investment, Identifier [Axis]: PetVet Care Centers, LLC, Health Care Services, Preferred Equity                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 4,531 [9]   4,531 [9] 4,531 [9] 4,531 [9] 4,531 [9] 4,531 [5] 4,531 [5] 4,531 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 5,022                
Fair value, ending balance [9] $ 5,401                
Investment, Identifier [Axis]: Phoenix Finance, Inc., Application Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 9.00%   9.00% 9.00% 9.00% 9.00%      
Investment, interest rate (as a percent) [9],[11],[14]        
Investment, interest rate, paid in kind (as a percent) [9],[14] 13.30%   13.30% 13.30% 13.30% 13.30%      
Investment owned, balance, principal amount [9],[12],[14] $ 5,149                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 4,994                
Investment, Identifier [Axis]: Phoenix Finance, Inc., Application Software, Second Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 7.50%   7.50% 7.50% 7.50% 7.50%      
Investment, interest rate (as a percent) [9],[11],[14]        
Investment, interest rate, paid in kind (as a percent) [9],[14] 11.95%   11.95% 11.95% 11.95% 11.95%      
Investment owned, balance, principal amount [9],[12],[14] $ 9,257                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 8,378                
Investment, Identifier [Axis]: Pluralsight, LLC, Application Software, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 4,300,526 [9]   4,300,526 [9] 4,300,526 [9] 4,300,526 [9] 4,300,526 [9] 4,300,526 [5] 4,300,526 [5] 4,300,526 [5]
Investment owned, balance, principal amount [5],[8]                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 14,364                
Fair value, ending balance [9] $ 9,977                
Investment, Identifier [Axis]: Pluralsight, LLC, Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.50% [9],[10],[14]   4.50% [9],[10],[14] 4.50% [9],[10],[14] 4.50% [9],[10],[14] 4.50% [9],[10],[14] 4.50% [4],[5],[20] 4.50% [4],[5],[20] 4.50% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Fair value, ending balance [9],[10],[14] $ 0                
Investment, Identifier [Axis]: Pluralsight, LLC, Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.50% [9],[14]   4.50% [9],[14] 4.50% [9],[14] 4.50% [9],[14] 4.50% [9],[14] 4.50% [5],[20] 4.50% [5],[20] 4.50% [5],[20]
Investment, interest rate (as a percent) 7.33% [9],[11],[14]   7.33% [9],[11],[14] 7.33% [9],[11],[14] 7.33% [9],[11],[14] 7.33% [9],[11],[14] 8.12% [5],[6],[20] 8.12% [5],[6],[20] 8.12% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) 1.50% [9],[14]   1.50% [9],[14] 1.50% [9],[14] 1.50% [9],[14] 1.50% [9],[14] 1.50% [5],[20] 1.50% [5],[20] 1.50% [5],[20]
Investment owned, balance, principal amount $ 5,023 [9],[12],[14]           $ 4,965 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 4,965                
Fair value, ending balance [9],[14] $ 5,023                
Investment, Identifier [Axis]: Pluralsight, LLC, Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.50% [9],[14]   4.50% [9],[14] 4.50% [9],[14] 4.50% [9],[14] 4.50% [9],[14] 4.50% [4],[5],[20] 4.50% [4],[5],[20] 4.50% [4],[5],[20]
Investment, interest rate (as a percent) [9],[11],[14] 7.33%   7.33% 7.33% 7.33% 7.33%      
Investment, interest rate, paid in kind (as a percent) [9],[14] 1.50%   1.50% 1.50% 1.50% 1.50%      
Investment owned, balance, principal amount $ 8,701 [9],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Fair value, ending balance [9],[14] $ 8,701                
Investment, Identifier [Axis]: Pluralsight, LLC, Application Software, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.50% [9],[14]   7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 7.50% [9],[14] 4.50% [5],[20] 4.50% [5],[20] 4.50% [5],[20]
Investment, interest rate (as a percent) [5],[6],[20]             8.12% 8.12% 8.12%
Investment, interest rate, paid in kind (as a percent) 11.83% [9],[14]   11.83% [9],[14] 11.83% [9],[14] 11.83% [9],[14] 11.83% [9],[14] 1.50% [5],[20] 1.50% [5],[20] 1.50% [5],[20]
Investment owned, balance, principal amount $ 14,151 [9],[12],[14]           $ 8,601 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 8,601                
Fair value, ending balance [9],[14] $ 14,151                
Investment, Identifier [Axis]: Pluralsight, LLC, Application Software, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 4.50% [9],[10],[14]   4.50% [9],[10],[14] 4.50% [9],[10],[14] 4.50% [9],[10],[14] 4.50% [9],[10],[14] 7.50% [5],[20] 7.50% [5],[20] 7.50% [5],[20]
Investment, interest rate, paid in kind (as a percent) [5],[20]             12.62% 12.62% 12.62%
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 12,902 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 12,902                
Fair value, ending balance [9],[10],[14] $ 0                
Investment, Identifier [Axis]: Poseidon Midco AB, Pharmaceuticals, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[13],[14]   5.50% [9],[13],[14] 5.50% [9],[13],[14] 5.50% [9],[13],[14] 5.50% [9],[13],[14] 5.50% [5],[16],[20] 5.50% [5],[16],[20] 5.50% [5],[16],[20]
Investment, interest rate (as a percent) 7.56% [9],[11],[13],[14]   7.56% [9],[11],[13],[14] 7.56% [9],[11],[13],[14] 7.56% [9],[11],[13],[14] 7.56% [9],[11],[13],[14] 8.97% [5],[6],[16],[20] 8.97% [5],[6],[16],[20] 8.97% [5],[6],[16],[20]
Investment owned, balance, principal amount | €     € 12,868 [9],[12],[13],[14]         € 12,868 [5],[8],[16],[20]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] $ 13,994                
Fair value, ending balance [9],[13],[14] $ 15,105                
Investment, Identifier [Axis]: Poseidon Midco AB, Pharmaceuticals, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[13],[14]   5.50% [9],[10],[13],[14] 5.50% [9],[10],[13],[14] 5.50% [9],[10],[13],[14] 5.50% [9],[10],[13],[14] 5.50% [4],[5],[16],[20] 5.50% [4],[5],[16],[20] 5.50% [4],[5],[16],[20]
Investment, interest rate (as a percent) [9],[10],[11],[13],[14] 9.72%   9.72% 9.72% 9.72% 9.72%      
Investment owned, balance, principal amount $ 5,846 [9],[10],[12],[13],[14]           $ 0 [4],[5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] 0                
Fair value, ending balance [9],[10],[13],[14] $ 5,846                
Investment, Identifier [Axis]: Poseidon Midco AB, Pharmaceuticals, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[13],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount | € [9],[10],[12],[13],[14]     € 0            
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[13],[14] $ (51)                
Investment, Identifier [Axis]: Profrac Holdings II, LLC, Industrial Machinery & Supplies & Components, First Lien Floating Rate Bond                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.25% [9],[13],[14]   7.25% [9],[13],[14] 7.25% [9],[13],[14] 7.25% [9],[13],[14] 7.25% [9],[13],[14] 7.25% [5],[16],[20] 7.25% [5],[16],[20] 7.25% [5],[16],[20]
Investment, interest rate (as a percent) 11.54% [9],[11],[13],[14]   11.54% [9],[11],[13],[14] 11.54% [9],[11],[13],[14] 11.54% [9],[11],[13],[14] 11.54% [9],[11],[13],[14] 11.84% [5],[6],[16],[20] 11.84% [5],[6],[16],[20] 11.84% [5],[6],[16],[20]
Investment owned, balance, principal amount $ 24,513 [9],[12],[13],[14]           $ 26,642 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 26,410                
Fair value, ending balance [9],[13],[14] $ 24,268                
Investment, Identifier [Axis]: Protein For Pets Opco, LLC, Packaged Foods & Meats, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [9],[10],[14]   5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [4],[5],[20] 5.25% [4],[5],[20] 5.25% [4],[5],[20]
Investment, interest rate (as a percent) [9],[10],[11],[14] 9.58%   9.58% 9.58% 9.58% 9.58%      
Investment owned, balance, principal amount $ 572 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (41)                
Fair value, ending balance [9],[10],[14] $ 526                
Investment, Identifier [Axis]: Protein For Pets Opco, LLC, Packaged Foods & Meats, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [9],[14]   5.25% [9],[14] 5.25% [9],[14] 5.25% [9],[14] 5.25% [9],[14] 5.25% [5],[20] 5.25% [5],[20] 5.25% [5],[20]
Investment, interest rate (as a percent) 9.58% [9],[11],[14]   9.58% [9],[11],[14] 9.58% [9],[11],[14] 9.58% [9],[11],[14] 9.58% [9],[11],[14] 10.10% [5],[6],[20] 10.10% [5],[6],[20] 10.10% [5],[6],[20]
Investment owned, balance, principal amount $ 20,122 [9],[12],[14]           $ 20,274 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 19,887                
Fair value, ending balance [9],[14] 19,693                
Investment, Identifier [Axis]: Quantum Bidco Limited, Food Distributors, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[16],[20]             5.50% 5.50% 5.50%
Investment, interest rate (as a percent) [5],[6],[16],[20]             10.73% 10.73% 10.73%
Investment owned, balance, principal amount | £ [5],[8],[16],[20]                 £ 9,739
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 12,769                
Investment, Identifier [Axis]: Quantum Bidco Limited, Food Distributors, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[16],[20]             5.50% 5.50% 5.50%
Investment, interest rate (as a percent) [4],[5],[6],[16],[20]             10.70% 10.70% 10.70%
Investment owned, balance, principal amount [4],[5],[8],[16],[20]             $ 2,123    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] 2,715                
Investment, Identifier [Axis]: QuorumLabs, Inc., Application Software, Preferred Equity                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [5]             64,887,669 64,887,669 64,887,669
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 0                
Investment, Identifier [Axis]: Renaissance Holding Corp., Education Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [14] 4.00%   4.00% 4.00% 4.00% 4.00%      
Investment, interest rate (as a percent) [11],[14] 8.28%   8.28% 8.28% 8.28% 8.28%      
Investment owned, balance, principal amount [12],[14] $ 9,923                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [14] $ 9,039                
Investment, Identifier [Axis]: RumbleOn, Inc., Automotive Retail, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 8.25% [9],[13],[14]   8.25% [9],[13],[14] 8.25% [9],[13],[14] 8.25% [9],[13],[14] 8.25% [9],[13],[14] 8.25% [5],[16],[20] 8.25% [5],[16],[20] 8.25% [5],[16],[20]
Investment, interest rate (as a percent) 11.79% [9],[11],[13],[14]   11.79% [9],[11],[13],[14] 11.79% [9],[11],[13],[14] 11.79% [9],[11],[13],[14] 11.79% [9],[11],[13],[14] 12.77% [5],[6],[16],[20] 12.77% [5],[6],[16],[20] 12.77% [5],[6],[16],[20]
Investment, interest rate, paid in kind (as a percent) 1.00% [9],[13],[14]   1.00% [9],[13],[14] 1.00% [9],[13],[14] 1.00% [9],[13],[14] 1.00% [9],[13],[14] 1.00% [5],[16],[20] 1.00% [5],[16],[20] 1.00% [5],[16],[20]
Investment owned, balance, principal amount $ 8,898 [9],[12],[13],[14]           $ 8,819 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 8,334                
Fair value, ending balance [9],[13],[14] $ 8,364                
Investment, Identifier [Axis]: RumbleOn, Inc., Automotive Retail, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 8.25% [9],[13],[14]   8.25% [9],[13],[14] 8.25% [9],[13],[14] 8.25% [9],[13],[14] 8.25% [9],[13],[14] 8.25% [5],[16],[20] 8.25% [5],[16],[20] 8.25% [5],[16],[20]
Investment, interest rate (as a percent) 11.79% [9],[11],[13],[14]   11.79% [9],[11],[13],[14] 11.79% [9],[11],[13],[14] 11.79% [9],[11],[13],[14] 11.79% [9],[11],[13],[14] 12.77% [5],[6],[16],[20] 12.77% [5],[6],[16],[20] 12.77% [5],[6],[16],[20]
Investment, interest rate, paid in kind (as a percent) 1.00% [9],[13],[14]   1.00% [9],[13],[14] 1.00% [9],[13],[14] 1.00% [9],[13],[14] 1.00% [9],[13],[14] 1.00% [5],[16],[20] 1.00% [5],[16],[20] 1.00% [5],[16],[20]
Investment owned, balance, principal amount $ 29,484 [9],[12],[13],[14]           $ 29,223 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 27,615                
Fair value, ending balance [9],[13],[14] $ 27,715                
Investment, Identifier [Axis]: RumbleOn, Inc., Automotive Retail, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 204,454 [9],[13]   204,454 [9],[13] 204,454 [9],[13] 204,454 [9],[13] 204,454 [9],[13] 204,454 [5],[16] 204,454 [5],[16] 204,454 [5],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 470                
Fair value, ending balance [9],[13] $ 123                
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 [9] 1,184,630 1,184,630 [9] 1,184,630 [9] 1,184,630 [9] 1,184,630 [9] 1,184,630 [5] 1,184,630 [5] 1,184,630 [5]
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 20,802 [5] 36,226              
Gross Additions 0 0              
Gross Reductions (20,802) (12,678)              
Fair value, ending balance $ 0 [9] $ 23,548              
Investment owned, percent of net assets (as a percent) 0.00% 1.60% 0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal, Glass & Plastic Containers, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 12.00% [9],[18] 12.00% 12.00% [9],[18] 12.00% [9],[18] 12.00% [9],[18] 12.00% [9],[18] 12.00% [5] 12.00% [5] 12.00% [5]
Investment owned, balance, principal amount $ 3,645 [9],[12],[18] $ 2,682         $ 3,332 [5],[8]    
Net Realized Gain (Loss) 0 0              
Amount of Interest, Fees or Dividends Credited in Income 103 71              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 3,332 [5] 0              
Gross Additions 139 2,682              
Gross Reductions (2,374) 0              
Fair value, ending balance $ 1,097 [9],[18] $ 2,682              
Investment owned, percent of net assets (as a percent) 0.10% 0.20% 0.10% 0.10% 0.10% 0.10%      
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal, Glass & Plastic Containers, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 12.00% [9],[18] 12.00% 12.00% [9],[18] 12.00% [9],[18] 12.00% [9],[18] 12.00% [9],[18] 12.00% [5] 12.00% [5] 12.00% [5]
Investment owned, balance, principal amount $ 19,586 [9],[12],[18] $ 17,363         $ 17,907 [5],[8]    
Net Realized Gain (Loss) 0 0              
Amount of Interest, Fees or Dividends Credited in Income 759 1,650              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 17,907 [5] 15,874              
Gross Additions 764 1,643              
Gross Reductions (12,778) (154)              
Fair value, ending balance $ 5,893 [9],[18] $ 17,363              
Investment owned, percent of net assets (as a percent) 0.40% 1.20% 0.40% 0.40% 0.40% 0.40%      
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal, Glass & Plastic Containers, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 12.00% [9],[18] 12.00% 12.00% [9],[18] 12.00% [9],[18] 12.00% [9],[18] 12.00% [9],[18] 12.00% [5] 12.00% [5] 12.00% [5]
Investment owned, balance, principal amount $ 3,883 [9],[12],[18] $ 3,442         $ 3,550 [5],[8]    
Net Realized Gain (Loss) 0 0              
Amount of Interest, Fees or Dividends Credited in Income 144 275              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 3,550 [5] 1,359              
Gross Additions 144 2,083              
Gross Reductions (2,526) 0              
Fair value, ending balance $ 1,168 [9],[18] $ 3,442              
Investment owned, percent of net assets (as a percent) 0.10% 0.20% 0.10% 0.10% 0.10% 0.10%      
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal, Glass & Plastic Containers, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 12.00% [9],[18]   12.00% [9],[18] 12.00% [9],[18] 12.00% [9],[18] 12.00% [9],[18] 12.00% [5] 12.00% [5] 12.00% [5]
Investment owned, balance, principal amount $ 1,750 [9],[12],[18]           $ 1,600 [5],[8]    
Net Realized Gain (Loss) 0                
Amount of Interest, Fees or Dividends Credited in Income 54                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] 1,600                
Gross Additions 54                
Gross Reductions (1,127)                
Fair value, ending balance [9],[18] $ 527                
Investment owned, percent of net assets (as a percent) 0.00%   0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal, Glass & Plastic Containers, First Lien Term Loan 5                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 12.00% [9],[18]   12.00% [9],[18] 12.00% [9],[18] 12.00% [9],[18] 12.00% [9],[18] 12.00% [4],[5] 12.00% [4],[5] 12.00% [4],[5]
Investment owned, balance, principal amount $ 1,702 [9],[12],[18]           $ 0 [4],[5],[8]    
Net Realized Gain (Loss) 0                
Amount of Interest, Fees or Dividends Credited in Income 25                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5] 0                
Gross Additions 1,608                
Gross Reductions (1,096)                
Fair value, ending balance [9],[18] $ 512                
Investment owned, percent of net assets (as a percent) 0.00%   0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal, Glass & Plastic Containers, First Lien Term Loan 6                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) [9],[18] 12.00%   12.00% 12.00% 12.00% 12.00%      
Investment owned, balance, principal amount [9],[12],[18] $ 816                
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 847                
Gross Reductions (31)                
Fair value, ending balance [9],[18] $ 816                
Investment owned, percent of net assets (as a percent) 0.10%   0.10% 0.10% 0.10% 0.10%      
Investment, Identifier [Axis]: SIO2 Medical Products, Inc., Metal, Glass & Plastic Containers, First Lien Term Loan 7                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) [9],[18] 12.00%   12.00% 12.00% 12.00% 12.00%      
Investment owned, balance, principal amount [9],[12],[18] $ 800                
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 801                
Gross Reductions (1)                
Fair value, ending balance [9],[18] $ 800                
Investment owned, percent of net assets (as a percent) 0.10%   0.10% 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 [9] 66,686 66,686 [9] 66,686 [9] 66,686 [9] 66,686 [9] 66,686 [5] 66,686 [5] 66,686 [5]
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 [5] 0              
Gross Additions 0 0              
Gross Reductions 0 0              
Fair value, ending balance $ 0 [9] $ 0              
Investment owned, percent of net assets (as a percent) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: SLF JV 1 Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.00%   7.00% 7.00% 7.00% 7.00%      
Investment, Identifier [Axis]: SM Wellness Holdings, Inc., Health Care Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             4.50% 4.50% 4.50%
Investment, interest rate (as a percent) [5],[6],[20]             10.01% 10.01% 10.01%
Investment owned, balance, principal amount [5],[8],[20]             $ 4,406    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 4,318                
Investment, Identifier [Axis]: SM Wellness Holdings, Inc., Health Care Services, Second Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             8.00% 8.00% 8.00%
Investment, interest rate (as a percent) [5],[6],[20]             13.51% 13.51% 13.51%
Investment owned, balance, principal amount [5],[8],[20]             $ 12,034    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 11,432                
Investment, Identifier [Axis]: SVP-Singer Holdings Inc., Home Furnishings, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [9] 418,881   418,881 418,881 418,881 418,881      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9] $ 2,463                
Investment, Identifier [Axis]: SVP-Singer Holdings Inc., Home Furnishings, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[19],[20]             8.25% 8.25% 8.25%
Investment owned, balance, principal amount [5],[8],[19],[20]             $ 28,146    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[19],[20] 8,444                
Investment, Identifier [Axis]: SVP-Singer Holdings Inc., Home Furnishings, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[19],[20]             9.75% 9.75% 9.75%
Investment owned, balance, principal amount [4],[5],[8],[19],[20]             $ 932    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[19],[20] $ 932                
Investment, Identifier [Axis]: Salus Workers' Compensation, LLC, Diversified Financial Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 10.50% [9],[10],[14]   10.50% [9],[10],[14] 10.50% [9],[10],[14] 10.50% [9],[10],[14] 10.50% [9],[10],[14] 10.00% [4],[5],[20] 10.00% [4],[5],[20] 10.00% [4],[5],[20]
Investment, interest rate (as a percent) [9],[10],[11],[14] 14.82%   14.82% 14.82% 14.82% 14.82%      
Investment owned, balance, principal amount $ 2,233 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (140)                
Fair value, ending balance [9],[10],[14] $ 2,047                
Investment, Identifier [Axis]: Salus Workers' Compensation, LLC, Diversified Financial Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 10.50% [9],[14]   10.50% [9],[14] 10.50% [9],[14] 10.50% [9],[14] 10.50% [9],[14] 10.00% [5],[20] 10.00% [5],[20] 10.00% [5],[20]
Investment, interest rate (as a percent) [5],[6],[20]             14.85% 14.85% 14.85%
Investment, interest rate, paid in kind (as a percent) [9],[14] 14.83%   14.83% 14.83% 14.83% 14.83%      
Investment owned, balance, principal amount $ 22,861 [9],[12],[14]           $ 22,107 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 21,112                
Fair value, ending balance [9],[14] $ 21,489                
Investment, Identifier [Axis]: Salus Workers' Compensation, LLC, Diversified Financial Services, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 991,019 [9]   991,019 [9] 991,019 [9] 991,019 [9] 991,019 [9] 991,019 [5] 991,019 [5] 991,019 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 89                
Fair value, ending balance [9] $ 0                
Investment, Identifier [Axis]: Saratoga, Diversified Financial Services, Credit Linked Note                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.33% [9],[13],[14],[30]   5.33% [9],[13],[14],[30] 5.33% [9],[13],[14],[30] 5.33% [9],[13],[14],[30] 5.33% [9],[13],[14],[30] 5.33% [5],[16],[20],[31] 5.33% [5],[16],[20],[31] 5.33% [5],[16],[20],[31]
Investment, interest rate (as a percent) 9.86% [9],[11],[13],[14],[30]   9.86% [9],[11],[13],[14],[30] 9.86% [9],[11],[13],[14],[30] 9.86% [9],[11],[13],[14],[30] 9.86% [9],[11],[13],[14],[30] 10.18% [5],[6],[16],[20],[31] 10.18% [5],[6],[16],[20],[31] 10.18% [5],[6],[16],[20],[31]
Investment owned, balance, principal amount $ 24,500 [9],[12],[13],[14],[30]           $ 24,500 [5],[8],[16],[20],[31]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20],[31] 24,478                
Fair value, ending balance [9],[13],[14],[30] 24,500                
Investment, Identifier [Axis]: Scilex Holding Co, Biotechnology, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [16]             9,307 9,307 9,307
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16] $ 9                
Investment, Identifier [Axis]: Scilex Holding Co, Pharmaceuticals, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [13] 274   274 274 274 274      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13] $ 2                
Investment, Identifier [Axis]: Secure Acquisition Inc., Paper & Plastic Packaging Products & Materials, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [20]             4.25% 4.25% 4.25%
Investment, interest rate (as a percent) [6],[20]             8.85% 8.85% 8.85%
Investment owned, balance, principal amount [8],[20]             $ 14,963    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] $ 15,009                
Investment, Identifier [Axis]: Senior Loan Fund JV I, LLC, Multi-Sector Holdings, Membership Interest                  
Schedule of Investments [Line Items]                  
Investment owned, ownership (as a percent) 87.50% [10],[13],[23],[26],[27] 87.50% 87.50% [10],[13],[23],[26],[27] 87.50% [10],[13],[23],[26],[27] 87.50% [10],[13],[23],[26],[27] 87.50% [10],[13],[23],[26],[27] 87.50% [4],[16],[25],[28],[29] 87.50% [4],[16],[25],[28],[29] 87.50% [4],[16],[25],[28],[29]
Net Realized Gain (Loss) $ 0 $ 0              
Amount of Interest, Fees or Dividends Credited in Income 1,925 4,200              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 22,541 [4],[16],[25],[28],[29] 28,878              
Gross Additions 0 0              
Gross Reductions (7,660) (3,061)              
Fair value, ending balance $ 14,881 [10],[13],[23],[26],[27] $ 25,817              
Investment owned, percent of net assets (as a percent) 1.00% 1.70% 1.00% 1.00% 1.00% 1.00%      
Investment, Identifier [Axis]: Senior Loan Fund JV I, LLC, Multi-Sector Holdings, Subordinated Debt                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.00% [9],[10],[13],[14],[26] 7.00% 7.00% [9],[10],[13],[14],[26] 7.00% [9],[10],[13],[14],[26] 7.00% [9],[10],[13],[14],[26] 7.00% [9],[10],[13],[14],[26] 7.00% [4],[5],[16],[20],[28] 7.00% [4],[5],[16],[20],[28] 7.00% [4],[5],[16],[20],[28]
Investment, interest rate (as a percent) 11.43% [9],[10],[11],[13],[14],[26] 12.44% 11.43% [9],[10],[11],[13],[14],[26] 11.43% [9],[10],[11],[13],[14],[26] 11.43% [9],[10],[11],[13],[14],[26] 11.43% [9],[10],[11],[13],[14],[26] 12.45% [4],[5],[6],[16],[20],[28] 12.45% [4],[5],[6],[16],[20],[28] 12.45% [4],[5],[6],[16],[20],[28]
Investment owned, balance, principal amount $ 112,656 [9],[10],[12],[13],[14],[26] $ 112,656         $ 112,656 [4],[5],[8],[16],[20],[28]    
Net Realized Gain (Loss) 0 0              
Amount of Interest, Fees or Dividends Credited in Income 9,922 10,672              
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 112,656 [4],[5],[16],[20],[28] 112,656              
Gross Additions 0 0              
Gross Reductions 0 0              
Fair value, ending balance $ 112,656 [9],[10],[13],[14],[26] $ 112,656              
Investment owned, percent of net assets (as a percent) 7.60% 7.50% 7.60% 7.60% 7.60% 7.60%      
Investment, Identifier [Axis]: Seres Therapeutics, Inc., Biotechnology, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 2,911 [9],[13]   2,911 [9],[13] 2,911 [9],[13] 2,911 [9],[13] 2,911 [9],[13] 58,210 [5],[16] 58,210 [5],[16] 58,210 [5],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 29                
Fair value, ending balance [9],[13] $ 13                
Investment, Identifier [Axis]: Sierra Enterprises, LLC, Soft Drinks & Non-alcoholic Beverages, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 6.00%   6.00% 6.00% 6.00% 6.00%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (19)                
Investment, Identifier [Axis]: Sierra Enterprises, LLC, Soft Drinks & Non-alcoholic Beverages, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 6.00%   6.00% 6.00% 6.00% 6.00%      
Investment, interest rate (as a percent) [9],[11],[14] 10.32%   10.32% 10.32% 10.32% 10.32%      
Investment owned, balance, principal amount [9],[12],[14] $ 11,248                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 11,096                
Investment, Identifier [Axis]: Sorenson Communications, LLC, Communications Equipment, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[10],[14]   5.75% [9],[10],[14] 5.75% [9],[10],[14] 5.75% [9],[10],[14] 5.75% [9],[10],[14] 5.75% [4],[5],[20] 5.75% [4],[5],[20] 5.75% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (89)                
Fair value, ending balance [9],[10],[14] $ (102)                
Investment, Identifier [Axis]: Sorenson Communications, LLC, Communications Equipment, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[14]   5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 5.75% [5],[20] 5.75% [5],[20] 5.75% [5],[20]
Investment, interest rate (as a percent) 10.08% [9],[11],[14]   10.08% [9],[11],[14] 10.08% [9],[11],[14] 10.08% [9],[11],[14] 10.08% [9],[11],[14] 10.60% [5],[6],[20] 10.60% [5],[6],[20] 10.60% [5],[6],[20]
Investment owned, balance, principal amount $ 44,994 [9],[12],[14]           $ 47,730 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 46,947                
Fair value, ending balance [9],[14] $ 44,148                
Investment, Identifier [Axis]: Sorrento Therapeutics, Inc., Biotechnology, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 66,000 [13]   66,000 [13] 66,000 [13] 66,000 [13] 66,000 [13] 66,000 [16] 66,000 [16] 66,000 [16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16] $ 0                
Fair value, ending balance [13] $ 0                
Investment, Identifier [Axis]: Spanx, LLC, Apparel Retail, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.00% [4],[5],[20] 5.00% [4],[5],[20] 5.00% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (15)                
Fair value, ending balance [9],[10],[14] $ (31)                
Investment, Identifier [Axis]: Spanx, LLC, Apparel Retail, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[14]   5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.25% [5],[20] 5.25% [5],[20] 5.25% [5],[20]
Investment, interest rate (as a percent) 9.93% [9],[11],[14]   9.93% [9],[11],[14] 9.93% [9],[11],[14] 9.93% [9],[11],[14] 9.93% [9],[11],[14] 10.20% [5],[6],[20] 10.20% [5],[6],[20] 10.20% [5],[6],[20]
Investment owned, balance, principal amount $ 17,918 [9],[12],[14]           $ 18,058 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 18,032                
Fair value, ending balance [9],[14] $ 17,739                
Investment, Identifier [Axis]: Spruce Bidco I Inc., Health Care Equipment, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (133)                
Investment, Identifier [Axis]: Spruce Bidco I Inc., Health Care Equipment, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [9],[11],[14] 9.13%   9.13% 9.13% 9.13% 9.13%      
Investment owned, balance, principal amount [9],[12],[14] $ 41,137                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 40,549                
Investment, Identifier [Axis]: Spruce Bidco I Inc., Health Care Equipment, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [9],[11],[14] 7.68%   7.68% 7.68% 7.68% 7.68%      
Investment owned, balance, principal amount [9],[12],[14]         $ 7,448        
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 5,380                
Investment, Identifier [Axis]: Spruce Bidco I Inc., Health Care Equipment, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.25%   5.25% 5.25% 5.25% 5.25%      
Investment, interest rate (as a percent) [9],[11],[14] 6.02%   6.02% 6.02% 6.02% 6.02%      
Investment owned, balance, principal amount | ¥ [9],[12],[14]           ¥ 796,342      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 5,434                
Investment, Identifier [Axis]: Staples, Inc., Office Services & Supplies, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [14]   5.75% [14] 5.75% [14] 5.75% [14] 5.75% [14] 5.75% [20] 5.75% [20] 5.75% [20]
Investment, interest rate (as a percent) 10.03% [11],[14]   10.03% [11],[14] 10.03% [11],[14] 10.03% [11],[14] 10.03% [11],[14] 10.69% [6],[20] 10.69% [6],[20] 10.69% [6],[20]
Investment owned, balance, principal amount $ 9,888 [12],[14]           $ 13,780 [8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [20] 12,555                
Fair value, ending balance [14] $ 9,150                
Investment, Identifier [Axis]: Staples, Inc., Office Services & Supplies, Fixed Rate Bond                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 10.75% [11]   10.75% [11] 10.75% [11] 10.75% [11] 10.75% [11] 10.75% [6] 10.75% [6] 10.75% [6]
Investment owned, balance, principal amount $ 4,835 [12]           $ 6,835 [8]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 6,641                
Fair value, ending balance $ 4,600                
Investment, Identifier [Axis]: Star Parent, Inc., Life Sciences Tools & Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [14] 4.00%   4.00% 4.00% 4.00% 4.00%      
Investment, interest rate (as a percent) [11],[14] 8.30%   8.30% 8.30% 8.30% 8.30%      
Investment owned, balance, principal amount [12],[14] $ 9,950                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [14] $ 9,865                
Investment, Identifier [Axis]: SumUp Holdings Luxembourg, Diversified Financial Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.50% [9],[10],[13],[14]   6.50% [9],[10],[13],[14] 6.50% [9],[10],[13],[14] 6.50% [9],[10],[13],[14] 6.50% [9],[10],[13],[14] 6.50% [4],[5],[16],[20] 6.50% [4],[5],[16],[20] 6.50% [4],[5],[16],[20]
Investment, interest rate (as a percent) 8.54% [9],[10],[11],[13],[14]   8.54% [9],[10],[11],[13],[14] 8.54% [9],[10],[11],[13],[14] 8.54% [9],[10],[11],[13],[14] 8.54% [9],[10],[11],[13],[14] 10.04% [4],[5],[6],[16],[20] 10.04% [4],[5],[6],[16],[20] 10.04% [4],[5],[6],[16],[20]
Investment owned, balance, principal amount     € 18,846 [9],[10],[12],[13],[14]       $ 18,846 [4],[5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] $ 20,785                
Fair value, ending balance [9],[10],[13],[14] 22,122                
Investment, Identifier [Axis]: Supreme Fitness Group NY Holdings, LLC, Leisure Facilities, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             7.00% 7.00% 7.00%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (62)                
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 (as a percent) [5],[20]             7.00% 7.00% 7.00%
Investment, interest rate (as a percent) [5],[6],[20]             12.58% 12.58% 12.58%
Investment owned, balance, principal amount [5],[8],[20]             $ 2,721    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 2,612                
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 (as a percent) [5],[20]             7.00% 7.00% 7.00%
Investment, interest rate (as a percent) [5],[6],[20]             12.58% 12.58% 12.58%
Investment owned, balance, principal amount | € [5],[8],[20]               € 3,273  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 3,142                
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 (as a percent) [5],[20]             7.00% 7.00% 7.00%
Investment, interest rate (as a percent) [5],[6],[20]             12.58% 12.58% 12.58%
Investment owned, balance, principal amount [5],[8],[20]             $ 31,778    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 30,507                
Investment, Identifier [Axis]: Symphone CLO Ltd, Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [13],[14] 5.00%   5.00% 5.00% 5.00% 5.00%      
Investment, interest rate (as a percent) [11],[13],[14] 9.27%   9.27% 9.27% 9.27% 9.27%      
Investment owned, balance, principal amount [12],[13],[14] $ 2,000                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [13],[14] $ 1,974                
Investment, Identifier [Axis]: TBRS, Inc., Health Care Supplies, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment, interest rate (as a percent) [9],[10],[11],[14] 9.08%   9.08% 9.08% 9.08% 9.08%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 144                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ 121                
Investment, Identifier [Axis]: TBRS, Inc., Health Care Supplies, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment, interest rate (as a percent) [9],[11],[14] 9.08%   9.08% 9.08% 9.08% 9.08%      
Investment owned, balance, principal amount [9],[12],[14] $ 16,872                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 16,703                
Investment, Identifier [Axis]: TBRS, Inc., Health Care Supplies, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 4.75%   4.75% 4.75% 4.75% 4.75%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] (21)                
Investment, Identifier [Axis]: THL Zinc Ventures Ltd, Diversified Metals & Mining, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) [5],[6],[16]             13.00% 13.00% 13.00%
Investment owned, balance, principal amount [5],[8],[16]             $ 50,419    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] $ 50,419                
Investment, Identifier [Axis]: Telephone and Data Systems, Inc., Wireless Telecommunication Services, Subordinated Debt Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.00% [9],[13],[14]   7.00% [9],[13],[14] 7.00% [9],[13],[14] 7.00% [9],[13],[14] 7.00% [9],[13],[14] 7.00% [5],[16],[20] 7.00% [5],[16],[20] 7.00% [5],[16],[20]
Investment, interest rate (as a percent) 11.26% [9],[11],[13],[14]   11.26% [9],[11],[13],[14] 11.26% [9],[11],[13],[14] 11.26% [9],[11],[13],[14] 11.26% [9],[11],[13],[14] 12.25% [5],[6],[16],[20] 12.25% [5],[6],[16],[20] 12.25% [5],[6],[16],[20]
Investment owned, balance, principal amount $ 24,843 [9],[12],[13],[14]           $ 25,031 [5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[20] 24,405                
Fair value, ending balance [9],[13],[14] $ 24,843                
Investment, Identifier [Axis]: Telephone and Data Systems, Inc., Wireless Telecommunication Services, Subordinated Debt Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.00% [9],[10],[13],[14]   7.00% [9],[10],[13],[14] 7.00% [9],[10],[13],[14] 7.00% [9],[10],[13],[14] 7.00% [9],[10],[13],[14] 7.00% [4],[5],[16],[20] 7.00% [4],[5],[16],[20] 7.00% [4],[5],[16],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[13],[14]           $ 0 [4],[5],[8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[20] (94)                
Fair value, ending balance [9],[10],[13],[14] $ 0                
Investment, Identifier [Axis]: Telestream 2 LLC, Application Software, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [9] 744,491   744,491 744,491 744,491 744,491      
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 7,207                
Gross Reductions 0                
Fair value, ending balance [9] $ 7,207                
Investment owned, percent of net assets (as a percent) 0.50%   0.50% 0.50% 0.50% 0.50%      
Investment, Identifier [Axis]: Telestream 2 LLC, Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 8.25%   8.25% 8.25% 8.25% 8.25%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
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 [9],[10],[14] $ 0                
Investment owned, percent of net assets (as a percent) 0.00%   0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: Telestream 2 LLC, Application Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 6.25%   6.25% 6.25% 6.25% 6.25%      
Investment, interest rate (as a percent) [9],[11],[14] 10.54%   10.54% 10.54% 10.54% 10.54%      
Investment owned, balance, principal amount [9],[12],[14] $ 17,123                
Net Realized Gain (Loss) 0                
Amount of Interest, Fees or Dividends Credited in Income 120                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance 0                
Gross Additions 17,123                
Gross Reductions 0                
Fair value, ending balance [9],[14] $ 17,123                
Investment owned, percent of net assets (as a percent) 1.20%   1.20% 1.20% 1.20% 1.20%      
Investment, Identifier [Axis]: Telestream Holdings Corporation, Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[19],[20]             9.75% 9.75% 9.75%
Investment owned, balance, principal amount [4],[5],[8],[19],[20]             $ 1,946    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[19],[20] $ 1,727                
Investment, Identifier [Axis]: Telestream Holdings Corporation, Application Software, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[19],[20]             9.75% 9.75% 9.75%
Investment owned, balance, principal amount [5],[8],[19],[20]             $ 26,553    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[19],[20] $ 23,898                
Investment, Identifier [Axis]: Ten-X LLC, Interactive Media & Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.00% [14]   6.00% [14] 6.00% [14] 6.00% [14] 6.00% [14] 6.00% [5],[20] 6.00% [5],[20] 6.00% [5],[20]
Investment, interest rate (as a percent) 10.25% [11],[14]   10.25% [11],[14] 10.25% [11],[14] 10.25% [11],[14] 10.25% [11],[14] 10.74% [5],[6],[20] 10.74% [5],[6],[20] 10.74% [5],[6],[20]
Investment owned, balance, principal amount $ 19,525 [12],[14]           $ 19,683 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 18,837                
Fair value, ending balance [14] $ 17,792                
Investment, Identifier [Axis]: The Avery, Real Estate Operating Companies, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 10.00% [9],[18] 10.00% 10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [5],[19] 10.00% [5],[19] 10.00% [5],[19]
Investment owned, balance, principal amount $ 5,236 [9],[12],[18] $ 5,065         $ 5,065 [5],[8],[19]    
Net Realized Gain (Loss) 28 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 4,087 [5],[19] 0              
Gross Additions 0 4,657              
Gross Reductions (696) (545)              
Fair value, ending balance $ 3,391 [9],[18] $ 4,112              
Investment owned, percent of net assets (as a percent) 0.20% 0.30% 0.20% 0.20% 0.20% 0.20%      
Investment, Identifier [Axis]: The Avery, Real Estate Operating Companies, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, interest rate, paid in kind (as a percent) 10.00% [9],[18] 10.00% 10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [9],[18] 10.00% [5],[19] 10.00% [5],[19] 10.00% [5],[19]
Investment owned, balance, principal amount $ 21,622 [9],[12],[18] $ 20,917         $ 20,917 [5],[8],[19]    
Net Realized Gain (Loss) 449 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 18,235 [5],[19] 0              
Gross Additions 0 19,262              
Gross Reductions (2,994) (841)              
Fair value, ending balance $ 15,241 [9],[18] $ 18,421              
Investment owned, percent of net assets (as a percent) 1.00% 1.20% 1.00% 1.00% 1.00% 1.00%      
Investment, Identifier [Axis]: The Avery, Real Estate Operating Companies, Membership Interest                  
Schedule of Investments [Line Items]                  
Investment owned, ownership (as a percent) 6.40% [9] 6.40% 6.40% [9] 6.40% [9] 6.40% [9] 6.40% [9] 6.40% [5] 6.40% [5] 6.40% [5]
Investment owned, balance, principal amount $ 0 $ 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 [5] 0              
Gross Additions 0 0              
Gross Reductions 0 0              
Fair value, ending balance $ 0 [9] $ 0              
Investment owned, percent of net assets (as a percent) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Investment, Identifier [Axis]: Thrasio, LLC, Broadline Retail, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 321,058 [9]   321,058 [9] 321,058 [9] 321,058 [9] 321,058 [9] 321,058 [5] 321,058 [5] 321,058 [5]
Investment owned, balance, principal amount [5],[8]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 0                
Fair value, ending balance [9] $ 0                
Investment, Identifier [Axis]: Thrasio, LLC, Broadline Retail, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 10.00% [9],[14]   10.00% [9],[14] 10.00% [9],[14] 10.00% [9],[14] 10.00% [9],[14] 10.00% [5],[20] 10.00% [5],[20] 10.00% [5],[20]
Investment, interest rate, paid in kind (as a percent) 14.44% [9],[14]   14.44% [9],[14] 14.44% [9],[14] 14.44% [9],[14] 14.44% [9],[14] 15.54% [5],[20] 15.54% [5],[20] 15.54% [5],[20]
Investment owned, balance, principal amount $ 7,052 [9],[12],[14]           $ 6,141 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 6,018                
Fair value, ending balance [9],[14] $ 6,717                
Investment, Identifier [Axis]: Thrasio, LLC, Broadline Retail, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 10.00% [9],[14],[18]   10.00% [9],[14],[18] 10.00% [9],[14],[18] 10.00% [9],[14],[18] 10.00% [9],[14],[18] 10.00% [5],[19],[20] 10.00% [5],[19],[20] 10.00% [5],[19],[20]
Investment owned, balance, principal amount $ 21,640 [9],[12],[14],[18]           $ 18,844 [5],[8],[19],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[19],[20] 16,536                
Fair value, ending balance [9],[14],[18] 14,715                
Investment, Identifier [Axis]: Touchstone Acquisition, Inc., Health Care Supplies, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             6.00% 6.00% 6.00%
Investment, interest rate (as a percent) [5],[6],[20]             10.95% 10.95% 10.95%
Investment owned, balance, principal amount [5],[8],[20]             $ 14,508    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 14,218                
Investment, Identifier [Axis]: Trinitas CLO VI Ltd., Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.08% [13],[14]   7.08% [13],[14] 7.08% [13],[14] 7.08% [13],[14] 7.08% [13],[14] 7.08% [16],[20] 7.08% [16],[20] 7.08% [16],[20]
Investment, interest rate (as a percent) 11.36% [11],[13],[14]   11.36% [11],[13],[14] 11.36% [11],[13],[14] 11.36% [11],[13],[14] 11.36% [11],[13],[14] 12.36% [6],[16],[20] 12.36% [6],[16],[20] 12.36% [6],[16],[20]
Investment owned, balance, principal amount $ 905 [12],[13],[14]           $ 905 [8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16],[20] 856                
Fair value, ending balance [13],[14] $ 878                
Investment, Identifier [Axis]: Trinitas CLO XV DAC, Multi-Sector Holdings, CLO Notes                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.71% [13],[14]   7.71% [13],[14] 7.71% [13],[14] 7.71% [13],[14] 7.71% [13],[14] 7.71% [16],[20] 7.71% [16],[20] 7.71% [16],[20]
Investment, interest rate (as a percent) 11.98% [11],[13],[14]   11.98% [11],[13],[14] 11.98% [11],[13],[14] 11.98% [11],[13],[14] 11.98% [11],[13],[14] 12.99% [6],[16],[20] 12.99% [6],[16],[20] 12.99% [6],[16],[20]
Investment owned, balance, principal amount $ 1,000 [12],[13],[14]           $ 1,000 [8],[16],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [16],[20] 978                
Fair value, ending balance [13],[14] 972                
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Construction Machinery & Heavy Transportation Equipment, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             5.75% 5.75% 5.75%
Investment, interest rate (as a percent) [4],[5],[6],[20]             10.85% 10.85% 10.85%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 29    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] $ 29                
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Construction Machinery & Heavy Transportation Equipment, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[14]   5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 5.75% [5],[20] 5.75% [5],[20] 5.75% [5],[20]
Investment, interest rate (as a percent) 10.03% [9],[11],[14]   10.03% [9],[11],[14] 10.03% [9],[11],[14] 10.03% [9],[11],[14] 10.03% [9],[11],[14] 10.86% [5],[6],[20] 10.86% [5],[6],[20] 10.86% [5],[6],[20]
Investment owned, balance, principal amount $ 31,103 [9],[12],[14]           $ 26,457 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 26,457                
Fair value, ending balance [9],[14] $ 30,792                
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Construction Machinery & Heavy Transportation Equipment, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[14]   5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 5.75% [4],[5],[20] 5.75% [4],[5],[20] 5.75% [4],[5],[20]
Investment, interest rate (as a percent) [9],[11],[14] 10.06%   10.06% 10.06% 10.06% 10.06%      
Investment owned, balance, principal amount $ 565 [9],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 0                
Fair value, ending balance [9],[14] $ 559                
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Construction Machinery & Heavy Transportation Equipment, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.75%   5.75% 5.75% 5.75% 5.75%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (27)                
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Construction Machinery & Heavy Transportation Equipment, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.75%   5.75% 5.75% 5.75% 5.75%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (9)                
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Construction Machinery & Heavy Transportation Equipment, First Lien Term Loan 5                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.75%   5.75% 5.75% 5.75% 5.75%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (54)                
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Construction Machinery & Heavy Transportation Equipment, First Lien Term Loan 6                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[10],[14] 5.75%   5.75% 5.75% 5.75% 5.75%      
Investment owned, balance, principal amount [9],[10],[12],[14] $ 0                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[10],[14] $ (32)                
Investment, Identifier [Axis]: USIC Holdings, Inc., Diversified Support Services, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.25% [9],[10],[14]   5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [9],[10],[14] 5.25% [4],[5],[20] 5.25% [4],[5],[20] 5.25% [4],[5],[20]
Investment, interest rate (as a percent) 9.58% [9],[10],[11],[14]   9.58% [9],[10],[11],[14] 9.58% [9],[10],[11],[14] 9.58% [9],[10],[11],[14] 9.58% [9],[10],[11],[14] 10.10% [4],[5],[6],[20] 10.10% [4],[5],[6],[20] 10.10% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 917 [9],[10],[12],[14]           $ 975 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 955                
Fair value, ending balance [9],[10],[14] $ 917                
Investment, Identifier [Axis]: USIC Holdings, Inc., Diversified Support Services, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[14]   5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [9],[14] 5.50% [5],[20] 5.50% [5],[20] 5.50% [5],[20]
Investment, interest rate (as a percent) 9.83% [9],[11],[14]   9.83% [9],[11],[14] 9.83% [9],[11],[14] 9.83% [9],[11],[14] 9.83% [9],[11],[14] 10.35% [5],[6],[20] 10.35% [5],[6],[20] 10.35% [5],[6],[20]
Investment owned, balance, principal amount $ 15,694 [9],[12],[14]           $ 15,773 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 15,618                
Fair value, ending balance [9],[14] $ 15,694                
Investment, Identifier [Axis]: USIC Holdings, Inc., Diversified Support Services, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.50% [9],[10],[14]   5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [9],[10],[14] 5.50% [4],[5],[20] 5.50% [4],[5],[20] 5.50% [4],[5],[20]
Investment, interest rate (as a percent) 9.83% [9],[10],[11],[14]   9.83% [9],[10],[11],[14] 9.83% [9],[10],[11],[14] 9.83% [9],[10],[11],[14] 9.83% [9],[10],[11],[14] 10.35% [4],[5],[6],[20] 10.35% [4],[5],[6],[20] 10.35% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 314 [9],[10],[12],[14]           $ 24 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 15                
Fair value, ending balance [9],[10],[14] $ 314                
Investment, Identifier [Axis]: Verona Pharma, Inc., Pharmaceuticals, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 9.70% [9],[11],[13]   9.70% [9],[11],[13] 9.70% [9],[11],[13] 9.70% [9],[11],[13] 9.70% [9],[11],[13] 11.00% [5],[6],[16] 11.00% [5],[6],[16] 11.00% [5],[6],[16]
Investment owned, balance, principal amount $ 2,512 [9],[12],[13]           $ 2,512 [5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] 2,468                
Fair value, ending balance [9],[13] $ 2,512                
Investment, Identifier [Axis]: Verona Pharma, Inc., Pharmaceuticals, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) 9.70% [9],[11],[13]   9.70% [9],[11],[13] 9.70% [9],[11],[13] 9.70% [9],[11],[13] 9.70% [9],[11],[13] 11.00% [5],[6],[16] 11.00% [5],[6],[16] 11.00% [5],[6],[16]
Investment owned, balance, principal amount $ 3,198 [9],[12],[13]           $ 3,198 [5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16] 3,142                
Fair value, ending balance [9],[13] $ 3,198                
Investment, Identifier [Axis]: Verona Pharma, Inc., Pharmaceuticals, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) [9],[11],[13] 9.70%   9.70% 9.70% 9.70% 9.70%      
Investment owned, balance, principal amount $ 3,426 [9],[12],[13]           0 [4],[5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16] 0                
Fair value, ending balance [9],[13] $ 3,366                
Investment, Identifier [Axis]: Verona Pharma, Inc., Pharmaceuticals, First Lien Term Loan 4                  
Schedule of Investments [Line Items]                  
Investment, interest rate (as a percent) [9],[10],[11],[13] 11.00%   11.00% 11.00% 11.00% 11.00%      
Investment owned, balance, principal amount $ 0 [9],[10],[12],[13]           0 [4],[5],[8],[16]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16] 0                
Fair value, ending balance [9],[10],[13] 0                
Investment, Identifier [Axis]: Verona Pharma, Inc., Pharmaceuticals, First Lien Term Loan 5                  
Schedule of Investments [Line Items]                  
Investment owned, balance, principal amount [5],[8],[16],[17]             4,652    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[16],[17] 4,699                
Investment, Identifier [Axis]: Verona Pharma, Inc., Pharmaceuticals, First Lien Term Loan 6                  
Schedule of Investments [Line Items]                  
Investment owned, balance, principal amount [4],[5],[8],[16],[17]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[16],[17] $ 0                
Investment, Identifier [Axis]: WP CPP Holdings, LLC, Aerospace & Defense, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.25% [9],[10],[14]   7.25% [9],[10],[14] 7.25% [9],[10],[14] 7.25% [9],[10],[14] 7.25% [9],[10],[14] 6.75% [4],[5],[20] 6.75% [4],[5],[20] 6.75% [4],[5],[20]
Investment owned, balance, principal amount $ 0 [9],[10],[12],[14]           $ 0 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] (19)                
Fair value, ending balance [9],[10],[14] $ 0                
Investment, Identifier [Axis]: WP CPP Holdings, LLC, Aerospace & Defense, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.25% [9],[14]   7.25% [9],[14] 7.25% [9],[14] 7.25% [9],[14] 7.25% [9],[14] 7.50% [5],[20] 7.50% [5],[20] 7.50% [5],[20]
Investment, interest rate (as a percent) 11.57% [9],[11],[14]   11.57% [9],[11],[14] 11.57% [9],[11],[14] 11.57% [9],[11],[14] 11.57% [9],[11],[14] 8.39% [5],[6],[20] 8.39% [5],[6],[20] 8.39% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) [5],[20]             4.13% 4.13% 4.13%
Investment owned, balance, principal amount $ 30,983 [9],[12],[14]           $ 30,570 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 30,396                
Fair value, ending balance [9],[14] $ 30,983                
Investment, Identifier [Axis]: WP CPP Holdings, LLC, Aerospace & Defense, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 7.25% [9],[14]   7.25% [9],[14] 7.25% [9],[14] 7.25% [9],[14] 7.25% [9],[14] 7.50% [5],[20] 7.50% [5],[20] 7.50% [5],[20]
Investment, interest rate (as a percent) 11.57% [9],[11],[14]   11.57% [9],[11],[14] 11.57% [9],[11],[14] 11.57% [9],[11],[14] 11.57% [9],[11],[14] 8.39% [5],[6],[20] 8.39% [5],[6],[20] 8.39% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) [5],[20]             4.13% 4.13% 4.13%
Investment owned, balance, principal amount $ 1,468 [9],[12],[14]           $ 1,449 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 1,448                
Fair value, ending balance [9],[14] $ 1,468                
Investment, Identifier [Axis]: Werner Finco LP, Building Products, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [9],[14] 5.50%   5.50% 5.50% 5.50% 5.50%      
Investment, interest rate (as a percent) [9],[11],[14] 9.82%   9.82% 9.82% 9.82% 9.82%      
Investment owned, balance, principal amount [9],[12],[14] $ 12,814                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [9],[14] $ 12,622                
Investment, Identifier [Axis]: Win Brands Group LLC, Housewares & Specialties, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 14.00% [9],[14]   14.00% [9],[14] 14.00% [9],[14] 14.00% [9],[14] 14.00% [9],[14] 14.00% [5],[20] 14.00% [5],[20] 14.00% [5],[20]
Investment, interest rate (as a percent) 13.32% [9],[11],[14]   13.32% [9],[11],[14] 13.32% [9],[11],[14] 13.32% [9],[11],[14] 13.32% [9],[11],[14] 12.85% [5],[6],[20] 12.85% [5],[6],[20] 12.85% [5],[6],[20]
Investment, interest rate, paid in kind (as a percent) 5.00% [9],[14]   5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 5.00% [9],[14] 6.00% [5],[20] 6.00% [5],[20] 6.00% [5],[20]
Investment owned, balance, principal amount $ 2,588 [9],[12],[14]           $ 2,782 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 2,546                
Fair value, ending balance [9],[14] $ 2,348                
Investment, Identifier [Axis]: Win Brands Group LLC, Housewares & Specialties, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 4,871 [9]   4,871 [9] 4,871 [9] 4,871 [9] 4,871 [9] 4,871 [5] 4,871 [5] 4,871 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 0                
Fair value, ending balance [9] 0                
Investment, Identifier [Axis]: Win Brands Group LLC, Integrated Telecommunication Services, Common Stock                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares [5]             127,452 127,452 127,452
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 1,657                
Investment, Identifier [Axis]: X Holdings Corp., Interactive Media & Services, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [14] 6.50%   6.50% 6.50% 6.50% 6.50%      
Investment, interest rate (as a percent) [11],[14] 10.93%   10.93% 10.93% 10.93% 10.93%      
Investment owned, balance, principal amount [12],[14] $ 6,252                
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, ending balance [14] 6,120                
Investment, Identifier [Axis]: Zep Inc., Specialty Chemicals, First Lien Term Loan                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [5],[20]             4.00% 4.00% 4.00%
Investment, interest rate (as a percent) [5],[6],[20]             8.25% 8.25% 8.25%
Investment owned, balance, principal amount [5],[8],[20]             $ 19,431    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] $ 19,431                
Investment, Identifier [Axis]: athenahealth Group Inc., Health Care Technology, Preferred Equity                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 21,523 [9]   21,523 [9] 21,523 [9] 21,523 [9] 21,523 [9] 21,523 [5] 21,523 [5] 21,523 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 24,326                
Fair value, ending balance [9] $ 30,096                
Investment, Identifier [Axis]: iCIMs, Inc., Application Software, First Lien Revolver                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[10],[14]   5.75% [9],[10],[14] 5.75% [9],[10],[14] 5.75% [9],[10],[14] 5.75% [9],[10],[14] 5.75% [4],[5],[20] 5.75% [4],[5],[20] 5.75% [4],[5],[20]
Investment, interest rate (as a percent) 10.03% [9],[10],[11],[14]   10.03% [9],[10],[11],[14] 10.03% [9],[10],[11],[14] 10.03% [9],[10],[11],[14] 10.03% [9],[10],[11],[14] 10.67% [4],[5],[6],[20] 10.67% [4],[5],[6],[20] 10.67% [4],[5],[6],[20]
Investment owned, balance, principal amount $ 339 [9],[10],[12],[14]           $ 678 [4],[5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] 607                
Fair value, ending balance [9],[10],[14] $ 275                
Investment, Identifier [Axis]: iCIMs, Inc., Application Software, First Lien Term Loan 1                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 5.75% [9],[14]   5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 5.75% [9],[14] 5.75% [5],[20] 5.75% [5],[20] 5.75% [5],[20]
Investment, interest rate (as a percent) 10.03% [9],[11],[14]   10.03% [9],[11],[14] 10.03% [9],[11],[14] 10.03% [9],[11],[14] 10.03% [9],[11],[14] 10.67% [5],[6],[20] 10.67% [5],[6],[20] 10.67% [5],[6],[20]
Investment owned, balance, principal amount $ 25,511 [9],[12],[14]           $ 25,491 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 24,696                
Fair value, ending balance [9],[14] $ 24,794                
Investment, Identifier [Axis]: iCIMs, Inc., Application Software, First Lien Term Loan 2                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) 6.25% [9],[14]   6.25% [9],[14] 6.25% [9],[14] 6.25% [9],[14] 6.25% [9],[14] 6.25% [5],[20] 6.25% [5],[20] 6.25% [5],[20]
Investment, interest rate (as a percent) 10.53% [9],[11],[14]   10.53% [9],[11],[14] 10.53% [9],[11],[14] 10.53% [9],[11],[14] 10.53% [9],[11],[14] 11.17% [5],[6],[20] 11.17% [5],[6],[20] 11.17% [5],[6],[20]
Investment owned, balance, principal amount $ 3,636 [9],[12],[14]           $ 3,636 [5],[8],[20]    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5],[20] 3,581                
Fair value, ending balance [9],[14] 3,587                
Investment, Identifier [Axis]: iCIMs, Inc., Application Software, First Lien Term Loan 3                  
Schedule of Investments [Line Items]                  
Investment, basis spread, variable rate (as a percent) [4],[5],[20]             6.25% 6.25% 6.25%
Investment owned, balance, principal amount [4],[5],[8],[20]             $ 0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [4],[5],[20] $ 0                
Investment, Identifier [Axis]: scPharmaceuticals Inc., Pharmaceuticals, Warrants                  
Schedule of Investments [Line Items]                  
Investment owned, balance (in shares) | shares 53,700 [9]   53,700 [9] 53,700 [9] 53,700 [9] 53,700 [9] 53,700 [5] 53,700 [5] 53,700 [5]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]                  
Fair value, beginning balance [5] $ 121                
Fair value, ending balance [9] $ 81                
[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 nine months ended June 30, 2025 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 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.
[3] 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.
[4] 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.
[5] As of September 30, 2024, these investments were categorized as Level 3 within the fair value hierarchy established by ASC 820.
[6] 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.
[7] This investment represents a participation interest in the underlying securities shown.
[8] 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.
[9] As of June 30, 2025, 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").
[10] 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.
[11] 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.
[12] 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. "C$" signifies the investment is denominated in Canadian dollar. "¥" signifies the investment is denominated in Japanese Yen. All other investments are denominated in U.S. dollars.
[13] 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 June 30, 2025, qualifying assets represented 73.0% of the Company's total assets and non-qualifying assets represented 27.0% of the Company's total assets.
[14] 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 euro interbank offered rate ("EURIBOR" or "E"), 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. As of June 30, 2025, the reference rates for the Company's variable rate loans were the 30-day SOFR at 4.32%, the 90-day SOFR at 4.29%, the 180-day SOFR at 4.15%, the PRIME at 7.50%, the SONIA at 4.32%, the Tokyo Overnight Average Rate ("TONA") at 0.75%, the 30-day Canadian Overnight Repo Rate Average ("CORRA") at 2.75%, the 30-day EURIBOR at 1.93%, the 90-day EURIBOR at 1.94% and the 180-day EURIBOR at 2.05%. Most loans include an interest floor, which generally ranges from 0% to 3.00%. SOFR and SONIA based contracts may include a credit spread adjustment that is charged in addition to the base rate and the stated spread.
[15] 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.
[16] 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, 2024, qualifying assets represented 74.4% of the Company's total assets and non-qualifying assets represented 25.6% of the Company's total assets.
[17] 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.
[18] This investment was on non-accrual status as of June 30, 2025.
[19] This investment was on non-accrual status as of September 30, 2024.
[20] The interest rate on the principal balance outstanding for most of the floating rate loans is indexed to SOFR, EURIBOR, 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. As of September 30, 2024, the reference rates for the Company's variable rate loans were the 30-day SOFR at 4.85%, the 90-day SOFR at 4.59%, the 180-day SOFR at 4.25%, the PRIME at 8.00%, the SONIA at 5.50%, the 90-day EURIBOR at 3.54% and the 180-day EURIBOR at 3.11%. Most loans include an interest floor, which generally ranges from 0% to 3.00%. SOFR and SONIA based contracts may include a credit spread adjustment that is charged in addition to the base rate and the stated spread.
[21] This investment represents Seller Earn Out Shares in Alvotech Holdings S.A. The Seller Earn Out Shares will vest if, at any time through June 16, 2027, the Alvotech Holdings S.A. common share price is at or above a volume weighted average price ("VWAP") of $20.00 per share for any ten trading days within any twenty trading day period.
[22] This investment represents Seller Earn Out Shares in Alvotech Holdings S.A. The Seller Earn Out Shares will vest if, at any time through June 16, 2027, the Alvotech Holdings S.A. 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.
[23] Income producing through payment of dividends or distributions.
[24] This investment was renamed during the three months ended June 30, 2024. For the periods prior to June 30, 2024, this investment was referenced as SCP Eye Care Services, LLC.
[25] Income producing through payment of dividends or distributions.
[26] See Note 3 in the accompanying notes to the Consolidated Financial Statements for portfolio composition of the Company's joint ventures.
[27] 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.
[28] See Note 3 in the accompanying notes to the Consolidated Financial Statements for portfolio composition of the Company's joint ventures.
[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] This investment represents a credit default swap that functions, in substance, like a credit linked note and represents a credit risk transfer for a pool of reference assets owned by a bank. The Company fully funded margin up front and in return the Company receives periodic interest payments. The Company’s risk of loss is limited to the principal amount disclosed herein. The reference assets are primarily composed of investment grade corporate debt. The Company may be exposed to counterparty risk, which could make it difficult for the Company to collect on obligations, thereby resulting in potentially significant losses. In addition, the Company only has a contractual relationship with the counterparty bank, and not with the reference obligors of the reference assets. Accordingly, the Company generally may have no right to directly enforce compliance by the reference obligors with the terms of the reference assets. The Company will not directly benefit from the reference assets and will not have the benefit of the remedies that would normally be available to a holder of such reference assets. In addition, in the event of the insolvency of the counterparty bank, the Company may be treated as a general creditor of such counterparty bank, and will not have any claim with respect to the reference assets.
[31] This investment represents a credit default swap that functions, in substance, like a credit linked note and represents a credit risk transfer for a pool of reference assets owned by a bank. The Company fully funded margin up front and in return the Company receives periodic interest payments. The Company’s risk of loss is limited to the principal amount disclosed herein. The reference assets are primarily composed of investment grade corporate debt. The Company may be exposed to counterparty risk, which could make it difficult for the Company to collect on obligations, thereby resulting in potentially significant losses. In addition, the Company only has a contractual relationship with the counterparty bank, and not with the reference obligors of the reference assets. Accordingly, the Company generally may have no right to directly enforce compliance by the reference obligors with the terms of the reference assets. The Company will not directly benefit from the reference assets and will not have the benefit of the remedies that would normally be available to a holder of such reference assets. In addition, in the event of the insolvency of the counterparty bank, the Company may be treated as a general creditor of such counterparty bank, and will not have any claim with respect to the reference assets.