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Transactions with Affiliate Companies - Fair Value Roll Forward (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [1],[2]     $ 2,528,167    
PIK interest (cost) $ 3,008 $ 1,621 6,002 $ 3,733  
Net realized gain (loss)     224 (660)  
Net change in unrealized gain (loss)     5,222 1,797  
Fair value at the ending [1],[3] 3,387,141   3,387,141    
Non-controlled affiliate company investments          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     75,314 [1],[2] 39,188  
Transfers in (out)     10,588 0  
Purchases (cost)     36,327 8,951  
Sales and paydowns (cost)     (89) (25)  
PIK interest (cost) 77 0 146 0  
Discount accretion     61 15  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss) (9,412) 120 (10,055) 722  
Fair value at the ending 112,292 [1],[3] 48,851 112,292 [1],[3] 48,851  
Non-controlled affiliate company investments | ClearlyRated Capital (Class A Units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     5,500 0  
Transfers in (out)     0 0  
Purchases (cost)     0 5,500  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     0 0  
Fair value at the ending 5,500 5,500 5,500 5,500  
Non-controlled affiliate company investments | Born To Run, LLC.          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     10,588    
Purchases (cost)     865    
Sales and paydowns (cost)     (13)    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     (9,256)    
Fair value at the ending 2,184   2,184    
Non-controlled affiliate company investments | Nastel Technologies, LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     7,726 7,078  
Transfers in (out)     0 0  
Purchases (cost)     0 0  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     5 6  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     302 744  
Fair value at the ending 8,033 7,828 8,033 7,828  
Non-controlled affiliate company investments | Second Avenue S F R Holdings I I L L C          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     3,323 4,755  
Transfers in (out)     0 0  
Purchases (cost)     0 0  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     0 6  
Fair value at the ending 3,323 4,761 3,323 4,761  
Non-controlled affiliate company investments | S F R Holdco, L L C          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     19,123 13,611  
Transfers in (out)     0 0  
Purchases (cost)     0 3,451  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     (1,439) 0  
Fair value at the ending 17,684 17,062 17,684 17,062  
Non-controlled affiliate company investments | SheerTrans Solutions, LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     15,252 13,744  
Transfers in (out)     0 0  
Purchases (cost)     4,478 0  
Sales and paydowns (cost)     (16) (25)  
PIK interest (cost)     146 0  
Discount accretion     11 9  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     138 (28)  
Fair value at the ending 20,009 13,700 20,009 13,700  
Non-controlled affiliate company investments | Summit Professional Education, LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     0    
Purchases (cost)     26,770    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     2    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     (2)    
Fair value at the ending 26,770   26,770    
Non-controlled affiliate company investments | Triad Financial Services, Inc.          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     0    
Purchases (cost)     4,214    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     (313)    
Fair value at the ending 3,901   3,901    
Non-controlled affiliate company investments | Zoodega Landscaping, LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     24,390    
Transfers in (out)     0    
Purchases (cost)     0    
Sales and paydowns (cost)     (60)    
PIK interest (cost)     0    
Discount accretion     43    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     515    
Fair value at the ending 24,888   24,888    
Investment, Identifier [Axis]: 300 N. Michigan Mezz, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[5] 1,000   1,000    
Investment, Identifier [Axis]: 300 N. Michigan Mezz, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[7],[8],[9]     997    
Investment, Identifier [Axis]: 95 Percent Buyer, LLC, Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10]     922    
Number of shares held [10]         385,027
Investment, Identifier [Axis]: 95 Percent Buyer, LLC, Equity Securities, Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11] $ 970   $ 970    
Number of shares held [11] 385,027   385,027    
Investment, Identifier [Axis]: 95 Percent Buyer, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[13],[14] $ 16,067   $ 16,067    
Investment, Identifier [Axis]: 95 Percent Buyer, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: 95 Percent Buyer, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: 95 Percent Buyer, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[17],[18]     16,067    
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 6,267   6,267    
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     6,248    
Investment, Identifier [Axis]: AMS Parent, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 9,600   9,600    
Investment, Identifier [Axis]: API Holdings III Corp., Junior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     1,046    
Fair value at the ending [3],[4] 1,228   1,228    
Investment, Identifier [Axis]: API Holdings III Corp., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     143    
Fair value at the ending [3],[4] 149   149    
Investment, Identifier [Axis]: ASG II, LLC, Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     15,000    
Investment, Identifier [Axis]: ASG II, LLC, Unitranche Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     1,350    
Investment, Identifier [Axis]: ASG II, LLC, Unitranche Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 14,981   14,981    
Investment, Identifier [Axis]: ASG II, LLC, Unitranche Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 2,247   2,247    
Investment, Identifier [Axis]: ASG III, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 20,000   20,000    
Investment, Identifier [Axis]: ASG III, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 7,579   7,579    
Investment, Identifier [Axis]: ASG III, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: ASG III, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     19,500    
Investment, Identifier [Axis]: ASG III, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: ASG III, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Acquia Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     15,429    
Investment, Identifier [Axis]: Acquia Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Acquia Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     289    
Fair value at the ending [3],[15] 235   235    
Investment, Identifier [Axis]: Acquia Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 15,429   15,429    
Investment, Identifier [Axis]: Acquia Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[20] 3,092   3,092    
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Equity Securities (Class A preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     172    
Number of shares held [10],[21]         314,584
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Equity Securities (Series B units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     47    
Number of shares held [10],[21]         45,874
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Equity Securities (Series C preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     43    
Number of shares held [10],[21]         42,816
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Equity Securities, Class A preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 0   $ 0    
Number of shares held [11],[22] 314,584   314,584    
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Equity Securities, Series B units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 0   $ 0    
Number of shares held [11],[22] 45,874   45,874    
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Equity Securities, Series C preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 0   $ 0    
Number of shares held [11],[22] 42,816   42,816    
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Senior Secured Loans (Revolver) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[9],[23]     $ 1,009    
Fair value at the ending [3],[5],[15],[24] $ 883   883    
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Senior Secured Loans (Revolver) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     1,205    
Fair value at the ending [3] 1,094   1,094    
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     5,950    
Fair value at the ending [3] 5,413   5,413    
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9],[23]     10,212    
Fair value at the ending [3],[4],[5],[24] 8,956   8,956    
Investment, Identifier [Axis]: Adept AG Holdings, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     1,491    
Fair value at the ending [3] 1,357   1,357    
Investment, Identifier [Axis]: Aduro Advisors, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13] 8,499   8,499    
Investment, Identifier [Axis]: Aduro Advisors, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 944   944    
Investment, Identifier [Axis]: Aduro Advisors, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     8,507    
Investment, Identifier [Axis]: Aduro Advisors, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     944    
Investment, Identifier [Axis]: Amelia Holding II, LLC, Equity Securities (warrant to purchase of the equity)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     144    
Fair value at the ending [3],[22] $ 121   $ 121    
Warrants to purchase percentage of equity [22] 0.10%   0.10%    
Investment, Identifier [Axis]: Amelia Holding II, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     $ 10,142    
Investment, Identifier [Axis]: Amelia Holding II, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     2,548    
Investment, Identifier [Axis]: Amelia Holding II, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     133    
Fair value at the ending [3],[15] $ 0   0    
Investment, Identifier [Axis]: Amelia Holding II, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 10,282   10,282    
Investment, Identifier [Axis]: Amelia Holding II, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 3,396   3,396    
Investment, Identifier [Axis]: American Broadband and Telecommunications Company LLC, Equity Securities (warrant to purchase equity)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 88   $ 88    
Warrants to purchase percentage of equity [22] 0.40%   0.40%    
Investment, Identifier [Axis]: American Broadband and Telecommunications Company LLC, Equity Securities (warrant to purchase of the equity)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     $ 99    
Investment, Identifier [Axis]: American Broadband and Telecommunications Company LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[15],[19] $ 2,785   2,785    
Investment, Identifier [Axis]: American Broadband and Telecommunications Company LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 250   250    
Investment, Identifier [Axis]: American Broadband and Telecommunications Company LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[7],[8]     2,861    
Investment, Identifier [Axis]: American Broadband and Telecommunications Company LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     247    
Investment, Identifier [Axis]: Animal Dermatology Group, Inc, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Animal Dermatology Group, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     9,980    
Fair value at the ending [3],[4],[13] 9,974   9,974    
Investment, Identifier [Axis]: Animal Dermatology Group, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     2,919    
Investment, Identifier [Axis]: Animal Dermatology Group, Inc., Senior Secured Loans (Delayed Draw) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 2,928   2,928    
Investment, Identifier [Axis]: Animal Dermatology Group, Inc., Senior Secured Loans (Delayed Draw) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Animal Dermatology Group, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Aperture Companies, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Aperture Companies, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[14] 14,646   14,646    
Investment, Identifier [Axis]: Aperture Companies, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 4,256   4,256    
Investment, Identifier [Axis]: Aperture Companies, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 1,943   1,943    
Investment, Identifier [Axis]: Aperture Companies, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Aperture Companies, LLC, Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     14,417    
Investment, Identifier [Axis]: Aperture Companies, LLC, Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     4,190    
Investment, Identifier [Axis]: Appriss Health, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     6,422    
Fair value at the ending [3],[14] 6,403   6,403    
Investment, Identifier [Axis]: Appriss Health, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 65   65    
Investment, Identifier [Axis]: Aptean, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 7,853   7,853    
Investment, Identifier [Axis]: Aptean, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 69   69    
Investment, Identifier [Axis]: Aptean, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Aras Corporation, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13] 5,366   5,366    
Investment, Identifier [Axis]: Aras Corporation, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 169   169    
Investment, Identifier [Axis]: Aras Corporation, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     4,875    
Investment, Identifier [Axis]: Aras Corporation, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     282    
Investment, Identifier [Axis]: Arax Midco, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5] 8,838   8,838    
Investment, Identifier [Axis]: Arax Midco, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[15],[19] 0   0    
Investment, Identifier [Axis]: Arax Midco, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[15] 0   0    
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (fka Arcstor Midco, LLC), Equity Securities (Class A common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 1,408   $ 1,408    
Number of shares held [22] 157,895   157,895    
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (fka Arcstor Midco, LLC), Equity Securities (Class B common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 2,622   $ 2,622    
Number of shares held [22] 294,118   294,118    
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (fka Arcstor Midco, LLC), Junior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25] $ 0   $ 0    
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (fka Arcstor Midco, LLC), Junior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25] 447   447    
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (fka Arcstor Midco, LLC), Junior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[25] 457   457    
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (fka Arcstor Midco, LLC), Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19],[25] 882   882    
Investment, Identifier [Axis]: Arcstor Midco, LLC, Junior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[26]     5,828    
Investment, Identifier [Axis]: Arcstor Midco, LLC, Junior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[26]     413    
Investment, Identifier [Axis]: Arcstor Midco, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[26]     413    
Investment, Identifier [Axis]: Argano, LLC, Equity Securities (common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     552    
Fair value at the ending [3],[11],[22] $ 501   $ 501    
Number of shares held 62,574 [11],[22]   62,574 [11],[22]   62,574 [10],[21]
Investment, Identifier [Axis]: Argano, LLC, Junior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10]     $ 28    
Fair value at the ending [3],[11] $ 28   28    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 965   965    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 1,200   1,200    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[14] 8,850   8,850    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12] 3,919   3,919    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13] 681   681    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans 5          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13] 4,685   4,685    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans 6          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 480   480    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans 7          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11] 10   10    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     481    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     965    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     1,206    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     8,895    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans LLC 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16]     3,939    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans LLC 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     684    
Investment, Identifier [Axis]: Argano, LLC, Senior Secured Loans LLC 5          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     4,709    
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     1,768    
Fair value at the ending [3],[15] 1,770   1,770    
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[13] 13,554   13,554    
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     2,498    
Fair value at the ending [3],[13] 2,488   2,488    
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     6,777    
Fair value at the ending [3],[4] 6,750   6,750    
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     2,927    
Fair value at the ending [3],[14] 2,915   2,915    
Investment, Identifier [Axis]: Arizona Natural Resources, LLC, Senior Secured Loans1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16],[17]     13,610    
Investment, Identifier [Axis]: Ascent Midco, LLC, Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10]     690    
Fair value at the ending [3],[11] $ 536   $ 536    
Number of shares held 725,806 [11]   725,806 [11]   725,806 [10]
Investment, Identifier [Axis]: Aspire Bakeries Holdings LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     $ 13,568    
Fair value at the ending [3],[12] $ 13,517   13,517    
Investment, Identifier [Axis]: Avalara, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     10,100    
Fair value at the ending [3],[14] 10,144   10,144    
Investment, Identifier [Axis]: Avalara, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Avalign Technologies, Inc.., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     9,158    
Investment, Identifier [Axis]: Avison Young (USA) Inc., Equity Securities, Class A preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[25],[27] $ 1,120   $ 1,120    
Number of shares held [5],[25],[27] 2,036,442   2,036,442    
Investment, Identifier [Axis]: Avison Young (USA) Inc., Equity Securities, Class F common shares          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[22],[27] $ 0   $ 0    
Number of shares held [5],[22],[27] 1,521   1,521    
Investment, Identifier [Axis]: Avison Young (USA) Inc., Junior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[25],[27] $ 1,490   $ 1,490    
Investment, Identifier [Axis]: Avison Young (USA) Inc., Junior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[25],[27] 381   381    
Investment, Identifier [Axis]: Avison Young (USA) Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[25],[27] 768   768    
Investment, Identifier [Axis]: Avison Young (USA) Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[26],[28]     627    
Investment, Identifier [Axis]: Avison Young (USA) Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[26],[28]     1,357    
Investment, Identifier [Axis]: B2B Industrial Products LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16]     9,806    
Fair value at the ending [3],[4] 9,687   9,687    
Investment, Identifier [Axis]: B2B Industrial Products LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     2,269    
Fair value at the ending [3],[4] 2,242   2,242    
Investment, Identifier [Axis]: BLP Buyer, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     49,000    
Investment, Identifier [Axis]: BLP Buyer, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: BLP Buyer, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     503    
Investment, Identifier [Axis]: BLP Buyer, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12],[13],[20] 50,225   50,225    
Investment, Identifier [Axis]: BLP Buyer, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 1,908   1,908    
Investment, Identifier [Axis]: BLP Buyer, Inc., Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 6,027   6,027    
Investment, Identifier [Axis]: BLP Buyer, Inc., Senior Secured Loans(Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 514   514    
Investment, Identifier [Axis]: BTR Opco LLC (fka Born To Run, LLC) (Class A common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     677    
Purchases (cost)     0    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     (677)    
Fair value at the ending $ 0   $ 0    
Number of units held 659   659    
Investment, Identifier [Axis]: BTR Opco LLC (fka Born To Run, LLC) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     $ 0    
Transfers in (out)     0    
Purchases (cost)     366    
Sales and paydowns (cost)     (11)    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     11    
Fair value at the ending $ 366   366    
Investment, Identifier [Axis]: BTR Opco LLC (fka Born To Run, LLC) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     1,611    
Purchases (cost)     81    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     126    
Fair value at the ending 1,818   1,818    
Investment, Identifier [Axis]: BTR Opco LLC (fka Born To Run, LLC) 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     8,300    
Purchases (cost)     418    
Sales and paydowns (cost)     (2)    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     (8,716)    
Fair value at the ending 0   0    
Investment, Identifier [Axis]: BTR Opco LLC (fka Born To Run, LLC), Equity Commitments (Class A common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held [22] 659   659    
Investment, Identifier [Axis]: BTR Opco LLC (fka Born To Run, LLC), Junior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19],[25] $ 366   $ 366    
Investment, Identifier [Axis]: BTR Opco LLC (fka Born To Run, LLC), Junior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25] 1,818   1,818    
Investment, Identifier [Axis]: BTR Opco LLC (fka Born To Run, LLC), Junior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25] 0   0    
Investment, Identifier [Axis]: BTRS Holdings Inc. , Senior Secured Loans(Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 400   400    
Investment, Identifier [Axis]: BTRS Holdings Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     10,000    
Fair value at the ending [3],[13] 10,000   10,000    
Investment, Identifier [Axis]: BTRS Holdings Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     414    
Fair value at the ending [3],[15],[19] 627   627    
Investment, Identifier [Axis]: BTRS Holdings Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     267    
Investment, Identifier [Axis]: BW 51f, L.P., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     9,000    
Fair value at the ending [3],[5] 9,000   9,000    
Investment, Identifier [Axis]: Bench Walk Lead, LLC, Equity Securities (commitment to purchase of the equity)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[10],[21]     1,765    
Fair value at the ending [3],[5],[11],[22] 1,517   1,517    
Investment, Identifier [Axis]: Bench Walk Lead, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     29,600    
Fair value at the ending [3],[5] 29,600   29,600    
Investment, Identifier [Axis]: Bench Walk Lead, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8],[9]     1,420    
Fair value at the ending [3],[5],[15],[19] 974   974    
Investment, Identifier [Axis]: Bloomerang, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13],[29] 16,014   16,014    
Investment, Identifier [Axis]: Bloomerang, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Bloomerang, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Bloomerang, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     15,680    
Investment, Identifier [Axis]: Bloomerang, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Bloomerang, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Bluesight, Inc., Equity Securities (Class A preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     286    
Fair value at the ending [3] $ 300   $ 300    
Number of shares held 311   311   311
Investment, Identifier [Axis]: Bluesight, Inc., Equity Securities (Class B common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     $ 0    
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held 166,310 [22]   166,310 [22]   166,310 [21]
Investment, Identifier [Axis]: Bluesight, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[17]     $ 29,946    
Fair value at the ending [3],[12],[13],[14] $ 29,949   29,949    
Investment, Identifier [Axis]: Bluesight, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Bluesight, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Bonterra LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     534    
Investment, Identifier [Axis]: Bonterra LLC, Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     18,685    
Investment, Identifier [Axis]: Bonterra LLC, Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     2,702    
Investment, Identifier [Axis]: Bonterra LLC, Senior Secured Loans, One          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 18,852   18,852    
Investment, Identifier [Axis]: Bonterra LLC, Senior Secured Loans, Revolver          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 1,113   1,113    
Investment, Identifier [Axis]: Bonterra LLC, Senior Secured Loans, Two          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 2,905   2,905    
Investment, Identifier [Axis]: Born To Run, LLC, Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     0    
Number of shares held [21]         692,841
Investment, Identifier [Axis]: Born To Run, LLC, Senior Secured Loans, 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     6,596    
Investment, Identifier [Axis]: Born To Run, LLC, Senior Secured Loans, 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     898    
Investment, Identifier [Axis]: Brickell Bay Acquisition Corp., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     2,791    
Investment, Identifier [Axis]: Brickell Bay Acquisition Corp., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 7,629   7,629    
Investment, Identifier [Axis]: Brickell Bay Acquisition Corp., Senior Secured Loans1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[14] 2,777   2,777    
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     4,705    
Fair value at the ending [3],[4] 4,786   4,786    
Investment, Identifier [Axis]: CE Intermediate, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13],[14],[20] 38,495   38,495    
Investment, Identifier [Axis]: CE Intermediate, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17],[18]     38,998    
Investment, Identifier [Axis]: CGI Automated Manufacturing, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 8,585   8,585    
Investment, Identifier [Axis]: CGI Automated Manufacturing, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     5,444    
Fair value at the ending [3],[4] 5,463   5,463    
Investment, Identifier [Axis]: CGI Automated Manufacturing, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     10,417    
Fair value at the ending [3],[4] 10,453   10,453    
Investment, Identifier [Axis]: CGI Automated Manufacturing, LLC, Senior Secured Loans1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     8,555    
Investment, Identifier [Axis]: Calabrio, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Calabrio, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 1,178   1,178    
Investment, Identifier [Axis]: Calabrio, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 8,000   8,000    
Investment, Identifier [Axis]: Calabrio, Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     8,050    
Investment, Identifier [Axis]: Calabrio, Inc., Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8],[18]     0    
Investment, Identifier [Axis]: Calabrio, Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     551    
Investment, Identifier [Axis]: Calienger Holdings, L.L.C., Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     568    
Number of shares held [10],[21]         568,181
Investment, Identifier [Axis]: Calienger Holdings, L.L.C., Equity Securities,1 Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 568   $ 568    
Number of shares held [11],[22] 568,181   568,181    
Investment, Identifier [Axis]: Calienger Holdings, L.L.C., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12] $ 4,987   $ 4,987    
Investment, Identifier [Axis]: Calienger Holdings, L.L.C., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Calienger Holdings, L.L.C., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Calienger Holdings, L.L.C., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     4,956    
Investment, Identifier [Axis]: Calienger Holdings, L.L.C., Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Calienger Holdings, L.L.C., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Caravel Autism Health, LLC, Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 3,600   $ 3,600    
Number of shares held [11],[22] 3,600   3,600    
Investment, Identifier [Axis]: Caravel Autism Health, LLC, Equity Securities (Class B units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 0   $ 0    
Number of shares held [11],[22] 4,011   4,011    
Investment, Identifier [Axis]: Caravel Autism Health, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] $ 17,685   $ 17,685    
Investment, Identifier [Axis]: Caravel Autism Health, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Caravel Autism Health, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     390    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Caravel Autism Health, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     7,950    
Investment, Identifier [Axis]: Caravel Autism Health, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     2,208    
Investment, Identifier [Axis]: Cassavant Holdings, LLC, Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[18]     13,784    
Investment, Identifier [Axis]: Centaur (Palm Beach) Owner LLC and Panther National Golf Club LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8],[9]     1,561    
Investment, Identifier [Axis]: Centaur (Palm Beach) Owner LLC and Panther National Golf Club LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[9]     2,647    
Fair value at the ending [3],[5],[15] 2,698   2,698    
Investment, Identifier [Axis]: Centaur (Palm Beach) Owner LLC and Panther National Golf Club LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     13,635    
Fair value at the ending [3],[5] 13,601   13,601    
Investment, Identifier [Axis]: Centaur (Palm Beach) Owner LLC and Panther National Golf Club LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     1,394    
Fair value at the ending [3],[5] 1,390   1,390    
Investment, Identifier [Axis]: Centaur (Palm Beach) Owner LLC and Panther National Golf Club LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5] 4,981   4,981    
Investment, Identifier [Axis]: Central Moloney, LLC, Equity Securities (Class A preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     4,451    
Number of shares held         4,451
Investment, Identifier [Axis]: Central Moloney, LLC, Equity Securities (Class B common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     0    
Number of shares held [21]         4,451
Investment, Identifier [Axis]: Central Moloney, LLC, Equity Securities, Class A preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] $ 6,029   $ 6,029    
Number of shares held 6,029   6,029    
Investment, Identifier [Axis]: Central Moloney, LLC, Equity Securities, Class B common units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 4,970   $ 4,970    
Number of shares held [22] 6,029   6,029    
Investment, Identifier [Axis]: Central Moloney, LLC, Equity Securities, Class G common units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 12   $ 12    
Number of shares held [22] 63   63    
Investment, Identifier [Axis]: Central Moloney, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] $ 16,062   $ 16,062    
Investment, Identifier [Axis]: Central Moloney, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12],[20] 31,921   31,921    
Investment, Identifier [Axis]: Central Moloney, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16]     35,588    
Investment, Identifier [Axis]: Chess.com, LLC, Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     162    
Number of shares held         5
Investment, Identifier [Axis]: Chess.com, LLC, Equity Securities, Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 109   $ 109    
Number of shares held [11],[22] 5   5    
Investment, Identifier [Axis]: Chess.com, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[14] $ 12,580   $ 12,580    
Investment, Identifier [Axis]: Chess.com, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     12,725    
Investment, Identifier [Axis]: Chess.com, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Chess.com, LLC, Senior Secured Loans, Revolver          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: ClearlyRated Capital, LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning       0  
Transfers in (out)       0  
Purchases (cost)       5,500  
Sales and paydowns (cost)       0  
PIK interest (cost)       0  
Discount accretion       0  
Net realized gain (loss)       0  
Net change in unrealized gain (loss)       0  
Fair value at the ending   $ 5,500   $ 5,500  
Number of units held   5,500,000   5,500,000  
Investment, Identifier [Axis]: ClearlyRated Capital, LLC (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     5,500    
Transfers in (out)     0    
Purchases (cost)     0    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     0    
Fair value at the ending $ 5,500   $ 5,500    
Number of units held 5,500,000   5,500,000    
Investment, Identifier [Axis]: ClearlyRated Capital, LLC, Equity Commitments (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     $ 5,500    
Number of shares held [21]         5,500,000
Investment, Identifier [Axis]: ClearlyRated Capital, LLC, Equity Securities, Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 5,500   $ 5,500    
Number of shares held [11],[22] 5,500,000   5,500,000    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] $ 761   $ 761    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 5,007   5,007    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[14] 4,995   4,995    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12],[20] 14,620   14,620    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 20,790   20,790    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     16,982    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     5,040    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[18]     5,027    
Investment, Identifier [Axis]: Clydesdale Holdings, LLC, Senior Secured Loans LLC 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     14,598    
Investment, Identifier [Axis]: Complete Innovations Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[5],[24],[27] 7,981   7,981    
Investment, Identifier [Axis]: Complete Innovations Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[5],[24],[27] 1,012   1,012    
Investment, Identifier [Axis]: Complete Innovations Inc., Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9],[23],[28]     8,285    
Investment, Identifier [Axis]: Complete Innovations Inc., Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9],[23],[28]     1,051    
Investment, Identifier [Axis]: Cosmos Bidco, Inc., Equity Securities (Class A Membership Interest)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     2,188    
Fair value at the ending [3],[22] $ 2,550   $ 2,550    
Number of shares held 2,250,000 [22]   2,250,000 [22]   2,250,000 [21]
Investment, Identifier [Axis]: Cosmos Bidco, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] $ 1,728   $ 1,728    
Investment, Identifier [Axis]: Cosmos Bidco, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Cosmos Bidco, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 36,288   36,288    
Investment, Identifier [Axis]: Cosmos Bidco, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 6,804   6,804    
Investment, Identifier [Axis]: Cosmos Bidco, Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     36,126    
Investment, Identifier [Axis]: Cosmos Bidco, Inc., Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Cosmos Bidco, Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Cpex Purchaser, LLC (fka Exiger LLC), Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 36,162   36,162    
Investment, Identifier [Axis]: Cpex Purchaser, LLC (fka Exiger LLC), Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Cpex Purchaser, LLC (fka Exiger LLC), Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Crownpeak Technology, Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     17    
Investment, Identifier [Axis]: Crownpeak Technology, Inc., Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     1,000    
Investment, Identifier [Axis]: Crownpeak Technology, Inc., Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     15    
Investment, Identifier [Axis]: Crownpeak Technology, Inc., Senior Secured Loans LLC 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     318    
Investment, Identifier [Axis]: Crownpeak Technology, Inc., Senior Secured Loans LLC 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     834    
Investment, Identifier [Axis]: Crownpeak Technology, Inc., Senior Secured Loans, Four          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13] 833   833    
Investment, Identifier [Axis]: Crownpeak Technology, Inc., Senior Secured Loans, One          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 999   999    
Investment, Identifier [Axis]: Crownpeak Technology, Inc., Senior Secured Loans, Revolver          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 125   125    
Investment, Identifier [Axis]: Crownpeak Technology, Inc., Senior Secured Loans, Three          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 318   318    
Investment, Identifier [Axis]: Crownpeak Technology, Inc., Senior Secured Loans, Two          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 15   15    
Investment, Identifier [Axis]: DS Parent, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[30]     20,040    
Fair value at the ending [3] 20,025   20,025    
Investment, Identifier [Axis]: DataOnline Corp., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[13],[14],[20] 34,858   34,858    
Investment, Identifier [Axis]: DataOnline Corp., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 185   185    
Investment, Identifier [Axis]: DataOnline Corp., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     35,022    
Investment, Identifier [Axis]: DataOnline Corp., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     3,701    
Investment, Identifier [Axis]: Demakes Borrower, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     4,756    
Fair value at the ending [3],[12] 4,851   4,851    
Investment, Identifier [Axis]: Demakes Borrower, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Denali Midco 2, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[20] 12,281   12,281    
Investment, Identifier [Axis]: Denali Midco 2, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 12,393   12,393    
Investment, Identifier [Axis]: Denali Midco 2, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     12,381    
Investment, Identifier [Axis]: Denali Midco 2, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     8,638    
Investment, Identifier [Axis]: Destination Media, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[20] 6,564   6,564    
Investment, Identifier [Axis]: Destination Media, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 616   616    
Investment, Identifier [Axis]: Destination Media, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 134   134    
Investment, Identifier [Axis]: Destination Media, Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     6,564    
Investment, Identifier [Axis]: Destination Media, Inc., Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     400    
Investment, Identifier [Axis]: Destination Media, Inc., Senior Secured Loans LLC(Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     134    
Investment, Identifier [Axis]: Dorado Acquisition, Inc., Equity Securities (Class A-1 units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     584    
Fair value at the ending [3],[22] $ 512   $ 512    
Number of shares held 531,783 [22]   531,783 [22]   531,783 [21]
Investment, Identifier [Axis]: Dorado Acquisition, Inc., Equity Securities (Class A-2 units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     $ 88    
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held 531,783 [22]   531,783 [22]   531,783 [21]
Investment, Identifier [Axis]: Dorado Acquisition, Inc., Senior Secured Loans (Revolver )          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     $ 0    
Investment, Identifier [Axis]: Dorado Acquisition, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] $ 0   0    
Investment, Identifier [Axis]: Dorado Acquisition, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17],[18]     13,281    
Fair value at the ending [3],[4],[13],[14] 13,254   13,254    
Investment, Identifier [Axis]: Dorado Acquisition, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16]     11,008    
Fair value at the ending [3],[4] 10,987   10,987    
Investment, Identifier [Axis]: Drawbridge Partners, LLC, Equity Securities (Class A-1 units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     735    
Fair value at the ending [3],[22] $ 766   $ 766    
Number of shares held 652,174 [22]   652,174 [22]   652,174 [21]
Investment, Identifier [Axis]: Drawbridge Partners, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     $ 15,003    
Investment, Identifier [Axis]: Drawbridge Partners, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     2,480    
Fair value at the ending [3],[15],[19] $ 3,568   3,568    
Investment, Identifier [Axis]: Drawbridge Partners, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Drawbridge Partners,, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 15,000   15,000    
Investment, Identifier [Axis]: E-Discovery Acquireco, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: E-Discovery Acquireco, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13] 20,400   20,400    
Investment, Identifier [Axis]: E-Discovery Acquireco, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 3,273   3,273    
Investment, Identifier [Axis]: E-Discovery Acquireco, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     20,000    
Investment, Identifier [Axis]: E-Discovery Acquireco, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: EOS Finco S.A.R.L., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[12],[27] 5,870   5,870    
Investment, Identifier [Axis]: EOS Finco S.A.R.L., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9],[16],[28]     6,702    
Investment, Identifier [Axis]: Edustaff, LLC, Equity Securities (common stock)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 1,021   $ 1,021    
Number of shares held [11],[22] 591   591    
Investment, Identifier [Axis]: Edustaff, LLC, Equity Securities (shares of common stock)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     $ 795    
Number of shares held [10],[21]         591
Investment, Identifier [Axis]: Edustaff, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13] $ 12,791   12,791    
Investment, Identifier [Axis]: Edustaff, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Edustaff, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     12,999    
Investment, Identifier [Axis]: Edustaff, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Epic Garage Partners, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14],[20] 7,478   7,478    
Investment, Identifier [Axis]: Epic Garage Partners, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Epic Garage Partners, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Epic Garage partners, LLC, Equity Securities, Common Stock          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 418   $ 418    
Investment, Identifier [Axis]: Epic Garage partners, LLC, Equity Securities, shares of common stock          
Transactions with Affiliated Companies, Fair value Roll Forward          
Number of shares held [11],[22] 43,269   43,269    
Investment, Identifier [Axis]: Epika Fleet Services, Inc. (preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 1,109   $ 1,109    
Number of shares held [22] 44,348   44,348    
Investment, Identifier [Axis]: Epika Fleet Services, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] $ 686   $ 686    
Investment, Identifier [Axis]: Epika Fleet Services, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 370   370    
Investment, Identifier [Axis]: Epika Fleet Services, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12] 16,964   16,964    
Investment, Identifier [Axis]: Epika Fleet Services, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 9,787   9,787    
Investment, Identifier [Axis]: Equine Network, LLC, Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     95    
Number of shares held [10],[21]         92
Investment, Identifier [Axis]: Equine Network, LLC, Equity Securities, Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 126   $ 126    
Number of shares held [11],[22] 92   92    
Investment, Identifier [Axis]: EverService Midco, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] $ 53,900   $ 53,900    
Investment, Identifier [Axis]: EverService Midco, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Evolve Biologics Inc., Equity Securities (equity commitments)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[21]     0    
Fair value at the ending [3],[5],[22] 0   0    
Investment, Identifier [Axis]: Evolve Biologics Inc., Equity Securities (warrant to purchase of the equity) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[22] 0   0    
Investment, Identifier [Axis]: Evolve Biologics Inc., Equity Securities (warrant to purchase of the equity) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[5],[22] 337   337    
Investment, Identifier [Axis]: Evolve Biologics Inc., Equity Securities (warrant)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[21]     146    
Investment, Identifier [Axis]: Evolve Biologics Inc., Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[5] 17,678   17,678    
Investment, Identifier [Axis]: Evolve Biologics Inc., Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9]     18,997    
Investment, Identifier [Axis]: Evolve Biologics Inc., Unitranche Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8],[9]     0    
Investment, Identifier [Axis]: Excelligence Learning Corporation, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12] 12,170   12,170    
Investment, Identifier [Axis]: Excelligence Learning Corporation, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 422   422    
Investment, Identifier [Axis]: Exiger LLC, Senior Secured Loan 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     2,004    
Investment, Identifier [Axis]: Exiger LLC, Senior Secured Loan 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     4,295    
Investment, Identifier [Axis]: Exiger LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     2,088    
Investment, Identifier [Axis]: Exiger LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Exiger LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     14,360    
Investment, Identifier [Axis]: Expedited Travel, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[13],[14],[20] 12,946   12,946    
Investment, Identifier [Axis]: Expedited Travel, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Expedited Travel, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17],[18]     15,600    
Investment, Identifier [Axis]: Expedited Travel, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC , Equity Securities (Class A common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     0    
Number of shares held [10],[21]         34,944
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Equity Securities (Class A preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10]     36    
Number of shares held [10]         35
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Equity Securities (Class B common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     0    
Number of shares held [10],[21]         164,381
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Equity Securities (Class B preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     29    
Number of shares held [10],[21]         164
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Equity Securities, Class A common units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 0   $ 0    
Number of shares held [11],[22] 34,944   34,944    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Equity Securities, Class A preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11] $ 31   $ 31    
Number of shares held [11] 35   35    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Equity Securities, Class B common units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 0   $ 0    
Number of shares held [11],[22] 164,381   164,381    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Equity Securities, Class B preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 0   $ 0    
Number of shares held [11],[22] 164   164    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] $ 295   $ 295    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 9,985   9,985    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 2,127   2,127    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     295    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     9,985    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     2,138    
Investment, Identifier [Axis]: FH BMX Buyer, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 8,910   8,910    
Investment, Identifier [Axis]: FH BMX Buyer, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Fiasco Enterprises, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Fiasco Enterprises, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 6,730   6,730    
Investment, Identifier [Axis]: Fiasco Enterprises, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 8,117   8,117    
Investment, Identifier [Axis]: Fiasco Enterprises, LLC., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Fiasco Enterprises, LLC., Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     6,774    
Investment, Identifier [Axis]: Fiasco Enterprises, LLC., Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     8,179    
Investment, Identifier [Axis]: First Brands Group, LLC (fka Trico Group, LLC), Junior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[30]     9,470    
Fair value at the ending [3],[12] 14,039   14,039    
Investment, Identifier [Axis]: Florida East Coast Industries, LLC, Junior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     1,934    
Fair value at the ending [3],[5] 1,797   1,797    
Investment, Identifier [Axis]: Forest Buyer, LLC, Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11] $ 1,071   $ 1,071    
Number of shares held [11] 1,088   1,088    
Investment, Identifier [Axis]: Forest Buyer, LLC, Equity Securities (Class B units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 0   $ 0    
Number of shares held [11],[22] 1,088   1,088    
Investment, Identifier [Axis]: Forest Buyer, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[14] $ 14,582   $ 14,582    
Investment, Identifier [Axis]: Forest Buyer, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Forest Buyer, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Fortra, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     6,635    
Fair value at the ending [3] 13,460   13,460    
Investment, Identifier [Axis]: Fueled Digital Media, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     726    
Fair value at the ending [3],[15] 703   703    
Investment, Identifier [Axis]: Fueled Digital Media, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     5,752    
Fair value at the ending [3] 5,508   5,508    
Investment, Identifier [Axis]: Fueled Digital Media, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     507    
Fair value at the ending [3],[4] 485   485    
Investment, Identifier [Axis]: GC Champion Acquisition LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 12,903   12,903    
Investment, Identifier [Axis]: GC Champion Acquisition LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     12,968    
Fair value at the ending [3],[4] 3,584   3,584    
Investment, Identifier [Axis]: GC Champion Acquisition LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     3,602    
Fair value at the ending [3],[4] 10,860   10,860    
Investment, Identifier [Axis]: GC Champion Acquisition LLC, Senior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     10,901    
Investment, Identifier [Axis]: Gargoyle Enterprises, Inc., Unitranche Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[31]     165    
Investment, Identifier [Axis]: Gargoyle Enterprises, Inc., Unitranche Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[32] 500   500    
Investment, Identifier [Axis]: Gibson Brands, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 1,152   1,152    
Investment, Identifier [Axis]: Golden State Buyer, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16]     9,504    
Fair value at the ending [3],[12] 9,607   9,607    
Investment, Identifier [Axis]: HAH Group Holding Company LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     2,859    
Fair value at the ending [3],[4] 5,108   5,108    
Investment, Identifier [Axis]: HAH Group Holding Company LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     757    
Fair value at the ending [3],[4] 3,937   3,937    
Investment, Identifier [Axis]: HAH Group Holding Company LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     362    
Fair value at the ending [3],[4] 646   646    
Investment, Identifier [Axis]: HS4 Acquisitionco, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 244   244    
Investment, Identifier [Axis]: HS4 Acquisitionco, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 3,880   3,880    
Investment, Identifier [Axis]: HS4 Acquisitionco, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 4,215   4,215    
Investment, Identifier [Axis]: HS4 Acquisitionco, Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     218    
Investment, Identifier [Axis]: HS4 Acquisitionco, Inc., Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     4,224    
Investment, Identifier [Axis]: HS4 Acquisitionco, Inc., Senior Secured Loans LLC1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     3,888    
Investment, Identifier [Axis]: Hanesbrands Inc. , Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[30]     5,000    
Investment, Identifier [Axis]: Huckabee Acquisition, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12],[20] 30,112   30,112    
Investment, Identifier [Axis]: Huckabee Acquisition, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Huckabee Acquisition, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: IDIG Parent, LLC, Equity Securities (common stock)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21],[33]     240    
Number of shares held [10],[21],[33]         192,908
Investment, Identifier [Axis]: IDIG Parent, LLC, Equity Securities, Common stock          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22],[34] $ 191   $ 191    
Number of shares held [11],[22],[34] 192,908   192,908    
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Equity Securities (Class A preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     $ 1,521    
Number of shares held [21]         1,500
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Equity Securities (Class B common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     0    
Number of shares held [21]         1,500
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Equity Securities, Class A preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 1,309   $ 1,309    
Number of shares held [22] 1,531   1,531    
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Equity Securities, Class B common units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held [22] 1,531   1,531    
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] $ 1,442   $ 1,442    
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12] 23,509   23,509    
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 6,600   6,600    
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     1,442    
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16]     23,385    
Investment, Identifier [Axis]: IF & P Holdings Company, LLC, Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     6,633    
Investment, Identifier [Axis]: INH Buyer, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     4,893    
Fair value at the ending [3],[4],[25] 2,678   2,678    
Investment, Identifier [Axis]: Idera, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[30]     4,112    
Investment, Identifier [Axis]: Incompass, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     23,400    
Fair value at the ending [3],[4],[12],[13],[20] 23,713   23,713    
Investment, Identifier [Axis]: Independence Buyer, Inc., Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     117    
Number of shares held [21]         169
Investment, Identifier [Axis]: Independence Buyer, Inc., Equity Securities, Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 88   $ 88    
Number of shares held [22] 169   169    
Investment, Identifier [Axis]: Independence Buyer, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     $ 11,270    
Fair value at the ending [3],[12],[14] $ 10,954   10,954    
Investment, Identifier [Axis]: Independence Buyer, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: InsideRE, LLC, Equity Securities (Class A common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     659    
Number of shares held [10],[21]         284,853
Investment, Identifier [Axis]: InsideRE, LLC, Equity Securities, Class A common units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 568   $ 568    
Number of shares held [11],[22] 284,853   284,853    
Investment, Identifier [Axis]: InsideRE, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     $ 0    
Fair value at the ending [3],[15] $ 0   0    
Investment, Identifier [Axis]: InsideRE, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     7,353    
Fair value at the ending [3],[12],[14] 7,315   7,315    
Investment, Identifier [Axis]: InsideRE, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     2,857    
Fair value at the ending [3],[13] 2,842   2,842    
Investment, Identifier [Axis]: Interstate BidCo, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12],[20] 14,895   14,895    
Investment, Identifier [Axis]: Interstate BidCo, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 4,862   4,862    
Investment, Identifier [Axis]: Interstate BidCo, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Interstate BidCo, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     14,700    
Investment, Identifier [Axis]: Interstate BidCo, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Interstate BidCo, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Inversiones DP6 (BVI) Numero Dos, Ltd., Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[27] 26,753   26,753    
Investment, Identifier [Axis]: Inversiones DP6 (BVI) Numero Dos, Ltd., Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[28]     26,041    
Investment, Identifier [Axis]: J2 BWA Funding III, LLC, Equity Securities (commitment to purchase of the equity)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[10],[21],[35]     443    
Fair value at the ending [3],[5],[11],[22],[36] 443   443    
Investment, Identifier [Axis]: J2 BWA Funding III, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8],[9]     910    
Fair value at the ending [3],[5],[15],[19] 2,022   2,022    
Investment, Identifier [Axis]: J2 BWA Funding LLC, Equity Securities (profit sharing)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[10],[21]     42    
Fair value at the ending [3],[5],[11],[22] 45   45    
Investment, Identifier [Axis]: J2 BWA Funding LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[9]     1,636    
Fair value at the ending [3],[5],[15] 1,701   1,701    
Investment, Identifier [Axis]: Jesse Studio Mezz, LLC, Junior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[15],[19] 33,756   33,756    
Investment, Identifier [Axis]: Jumpstart Holdco, Inc. , Equity Securities, Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 542   $ 542    
Number of shares held [22] 1,566,667   1,566,667    
Investment, Identifier [Axis]: Jumpstart Holdco, Inc., Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     $ 749    
Number of shares held [21]         1,566,667
Investment, Identifier [Axis]: Jumpstart Holdco, Inc., Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] $ 21,145   21,145    
Investment, Identifier [Axis]: Jumpstart Holdco, Inc., Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     21,497    
Investment, Identifier [Axis]: KL Moon Acquisition, LLC, Equity Securities (equity)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 422   $ 422    
Warrants to purchase percentage of equity [22] 0.30%   0.30%    
Investment, Identifier [Axis]: KL Moon Acquisition, LLC, Equity Securities (fka Spectrum Science Communications, LLC) (equity)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     $ 844    
Investment, Identifier [Axis]: KL Moon Acquisition, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] $ 1,932   1,932    
Investment, Identifier [Axis]: KL Moon Acquisition, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 1,591   1,591    
Investment, Identifier [Axis]: KL Moon Acquisition, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 4,154   4,154    
Investment, Identifier [Axis]: KL Moon Acquisition, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     9,950    
Fair value at the ending [3],[4] 9,689   9,689    
Investment, Identifier [Axis]: KL Moon Acquisition, LLC, Senior Secured Loans, Senior Secured LoanS (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     705    
Investment, Identifier [Axis]: KL Moon Acquisition, LLC, Senior Secured Loans, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     1,979    
Investment, Identifier [Axis]: KT Naples UB LLC, Junior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[15],[19] 6,964   6,964    
Investment, Identifier [Axis]: Keel Platform, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12] 7,416   7,416    
Investment, Identifier [Axis]: Keel Platform, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Kenco PPC Buyer LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16],[17]     21,678    
Investment, Identifier [Axis]: Kenco PPC Buyer LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Kenco PPC Buyer LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 1,365   1,365    
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 596   596    
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 2,942   2,942    
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12] 944   944    
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     650    
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC, Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     2,940    
Investment, Identifier [Axis]: Kingsley Gate Partners, LLC, Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     943    
Investment, Identifier [Axis]: LSCS Holdings, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     2,939    
Investment, Identifier [Axis]: LVF Holdings, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: LVF Holdings, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     3,421    
Fair value at the ending [3],[4] 3,425   3,425    
Investment, Identifier [Axis]: LVF Holdings, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     3,274    
Fair value at the ending [3],[4] 3,278   3,278    
Investment, Identifier [Axis]: Lessen Inc., Equity Securities (preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     1,667    
Number of shares held [21]         128,737
Investment, Identifier [Axis]: Lessen Inc., Equity Securities, preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 1,399   $ 1,399    
Number of shares held [22] 128,737   128,737    
Investment, Identifier [Axis]: Lessen LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] $ 8,360   $ 8,360    
Investment, Identifier [Axis]: Lessen LLC., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     7,810    
Investment, Identifier [Axis]: Lifted Trucks Holdings, LLC, Equity Securities (Class A shares)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     82    
Number of shares held [10],[21]         158,730
Investment, Identifier [Axis]: Lifted Trucks Holdings, LLC, Equity Securities, Class A shares          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 103   $ 103    
Number of shares held [11],[22] 158,730   158,730    
Investment, Identifier [Axis]: Lifted Trucks Holdings, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     $ 9,545    
Fair value at the ending [3],[12],[14] $ 9,589   9,589    
Investment, Identifier [Axis]: Lifted Trucks Holdings, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     773    
Investment, Identifier [Axis]: Lifted Trucks Holdings, LLC, Senior Secured Loans, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 1,483   1,483    
Investment, Identifier [Axis]: Light Wave Dental Management, Equity Securities LLC (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     2,880    
Number of shares held [10],[21]         300,218
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Equity Securities, Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 2,794   $ 2,794    
Number of shares held [11],[22] 306,152   306,152    
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[13],[20] $ 27,007   $ 27,007    
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 3,772   3,772    
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[17]     27,390    
Investment, Identifier [Axis]: Light Wave Dental Management, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     2,757    
Investment, Identifier [Axis]: Liquid Tech Solutions Holdings, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     2,196    
Investment, Identifier [Axis]: Long Ridge Energy & Power LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     17,150    
Fair value at the ending [3] 19,321   19,321    
Investment, Identifier [Axis]: Loparex Midco B.V. (fka PHM Netherlands Midco B.V.), Junior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[27] 460   460    
Investment, Identifier [Axis]: Loparex Midco B.V. (fka PHM Netherlands Midco B.V.), Junior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[27] 104   104    
Investment, Identifier [Axis]: Loparex Midco B.V. (fka PHM Netherlands Midco B.V.), Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[27] 324   324    
Investment, Identifier [Axis]: MB Purchaser, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[20] 15,075   15,075    
Investment, Identifier [Axis]: MB Purchaser, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 1,256   1,256    
Investment, Identifier [Axis]: MB Purchaser, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: MEI Buyer LLC, Equity Securities (units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     2,017    
Number of shares held [21]         1,982
Investment, Identifier [Axis]: MEI Buyer LLC, Equity Securities, Units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 2,719   $ 2,719    
Number of shares held [22] 2,275   2,275    
Investment, Identifier [Axis]: MEI Buyer LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     $ 26,054    
Investment, Identifier [Axis]: MEI Buyer LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] $ 0   0    
Investment, Identifier [Axis]: MEI Buyer LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: MEI Buyer LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12] 25,561   25,561    
Investment, Identifier [Axis]: MEI Buyer LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[20] 14,350   14,350    
Investment, Identifier [Axis]: MEI Buyer LLC, Senior Secured Loans, (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: MEI Buyer LLC, Senior Secured Loans, (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     96    
Investment, Identifier [Axis]: MV Receivables II, LLC, Equity Securities (common stock)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[10]     0    
Number of shares held [9],[10]         1,822
Investment, Identifier [Axis]: MV Receivables II, LLC, Equity Securities (warrant)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[10]     0    
Investment, Identifier [Axis]: MV Receivables II, LLC, Equity Securities, Common stock          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[11],[22] $ 0   $ 0    
Number of shares held [5],[11],[22] 1,822   1,822    
Investment, Identifier [Axis]: MV Receivables II, LLC, Equity Securities, Warrant          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[11],[22] $ 0   $ 0    
Investment, Identifier [Axis]: MV Receivables II, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     9,618    
Fair value at the ending [3],[5] 9,221   9,221    
Investment, Identifier [Axis]: Madison Logic Holdings, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 13,641   13,641    
Investment, Identifier [Axis]: Madison Logic Holdings, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Madison Logic Holdings, Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     13,774    
Investment, Identifier [Axis]: Madison Logic Holdings, Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Mammoth Holdings, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[20] 21,807   21,807    
Investment, Identifier [Axis]: Mammoth Holdings, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 4,931   4,931    
Investment, Identifier [Axis]: Mammoth Holdings, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Mammoth Holdings, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     21,382    
Investment, Identifier [Axis]: Mammoth Holdings, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Mammoth Holdings, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Matrix Parent, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16]     1,704    
Fair value at the ending [3],[4],[25] 942   942    
Investment, Identifier [Axis]: Medallia, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     11,776    
Fair value at the ending [3],[14] 12,003   12,003    
Investment, Identifier [Axis]: Milrose Consultants, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12],[20] 45,020   45,020    
Investment, Identifier [Axis]: Milrose Consultants, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Milrose Consultants, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Milrose Consultants, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16]     45,044    
Investment, Identifier [Axis]: Milrose Consultants, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Milrose Consultants, LLC, Senior Secured Loans LLC(Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Mindbody, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Mindbody, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     1,867    
Fair value at the ending [3],[14] 1,867   1,867    
Investment, Identifier [Axis]: Mindbody, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     5,194    
Fair value at the ending [3],[14] 2,270   2,270    
Investment, Identifier [Axis]: MoneyLion, Inc., Junior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9]     17,563    
Fair value at the ending [3],[4],[5] 17,432   17,432    
Investment, Identifier [Axis]: Moonraker Acquisitionco LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 6,895   6,895    
Investment, Identifier [Axis]: Moonraker Acquisitionco LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 280   280    
Investment, Identifier [Axis]: Moonraker Acquisitionco LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     6,930    
Investment, Identifier [Axis]: Moonraker Acquisitionco LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Moonraker Acquisitionco LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     93    
Investment, Identifier [Axis]: NFM & J, L.P., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13],[14] 13,327   13,327    
Investment, Identifier [Axis]: NFM & J, L.P., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 247   247    
Investment, Identifier [Axis]: NFM & J, L.P., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 264   264    
Investment, Identifier [Axis]: NFM & J, L.P., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17],[18]     13,081    
Investment, Identifier [Axis]: NFM & J, L.P., Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: NFM & J, L.P., Senior Secured Loans LLC(Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: NQ PE Project Colosseum Midco Inc., Equity Securities (common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     1,361    
Fair value at the ending [3],[22] $ 825   $ 825    
Number of shares held 1,364,614 [22]   1,364,614 [22]   1,364,614 [21]
Investment, Identifier [Axis]: NQ PE Project Colosseum Midco Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16],[17]     $ 14,599    
Fair value at the ending [3],[4],[12],[13] $ 14,179   14,179    
Investment, Identifier [Axis]: NQ PE Project Colosseum Midco Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: NQ PE Project Colosseum Midco Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: NQ PE Project Colosseum Midco Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Nastel Technologies, LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     3,500 $ 3,500  
Transfers in (out)     0 0  
Purchases (cost)     0 0  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     5 6  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     (5) (6)  
Fair value at the ending 3,500 $ 3,500 3,500 3,500  
Investment, Identifier [Axis]: Nastel Technologies, LLC (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     4,226 3,578  
Transfers in (out)     0 0  
Purchases (cost)     0 0  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     307 750  
Fair value at the ending $ 4,533 $ 4,328 $ 4,533 $ 4,328  
Number of units held 3,408 3,408 3,408 3,408  
Investment, Identifier [Axis]: Nastel Technologies, LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     $ 0 $ 0  
Transfers in (out)     0 0  
Purchases (cost)     0 0  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     0 0  
Fair value at the ending $ 0 $ 0 0 0  
Investment, Identifier [Axis]: Nastel Technologies, LLC, Equity Commitments (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     4,226    
Number of shares held [10],[21]         3,408
Investment, Identifier [Axis]: Nastel Technologies, LLC, Equity Securities, Class A Units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 4,533   $ 4,533    
Number of shares held [11],[22] 3,408   3,408    
Investment, Identifier [Axis]: Nastel Technologies, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] $ 3,500   $ 3,500    
Investment, Identifier [Axis]: Nastel Technologies, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     3,500    
Investment, Identifier [Axis]: Nastel Technologies, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: NationsBenefits, LLC, Equity Securities (Series B units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10]     2,162    
Fair value at the ending [3],[11] $ 5,388   $ 5,388    
Number of shares held 369,827 [11]   369,827 [11]   356,658 [10]
Investment, Identifier [Axis]: NationsBenefits, LLC, Equity Securities (common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     $ 0    
Fair value at the ending [3],[11],[22] $ 2,147   $ 2,147    
Number of shares held 326,667 [11],[22]   326,667 [11],[22]   326,667 [10],[21]
Investment, Identifier [Axis]: NationsBenefits, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     $ 2,722    
Fair value at the ending [3],[15] $ 4,764   4,764    
Investment, Identifier [Axis]: NationsBenefits, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     12,099    
Fair value at the ending [3],[4] 11,944   11,944    
Investment, Identifier [Axis]: NationsBenefits, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     14,419    
Fair value at the ending [3],[4] 14,235   14,235    
Investment, Identifier [Axis]: NationsBenefits, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     15,632    
Fair value at the ending [3] 15,433   15,433    
Investment, Identifier [Axis]: New Engen, Inc., Equity Securities (Class B common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     0    
Number of shares held [21]         5,067
Investment, Identifier [Axis]: New Engen, Inc., Equity Securities (preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     353    
Number of shares held         417
Investment, Identifier [Axis]: New Engen, Inc., Equity Securities, Class B common units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held [22] 5,067   5,067    
Investment, Identifier [Axis]: New Engen, Inc., Equity Securities, Preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] $ 399   $ 399    
Number of shares held 417   417    
Investment, Identifier [Axis]: New Engen, Inc., Unitranche Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     $ 9,358    
Fair value at the ending [3],[12],[14] $ 9,203   9,203    
Investment, Identifier [Axis]: New Engen, Inc., Unitranche Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     7,902    
Fair value at the ending [3],[12],[14] 7,772   7,772    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 356   356    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 291   291    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 2,413   2,413    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 699   699    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13] 1,412   1,412    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13] 2,553   2,553    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     353    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     103    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     2,399    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     695    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans LLC 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     1,404    
Investment, Identifier [Axis]: North Haven USHC Acquisition, Inc., Senior Secured Loans LLC 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     2,528    
Investment, Identifier [Axis]: OIS Management Services, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: OIS Management Services, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     10,024    
Fair value at the ending [3],[4],[13] 9,974   9,974    
Investment, Identifier [Axis]: OIS Management Services, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     3,868    
Fair value at the ending [3],[12] 3,848   3,848    
Investment, Identifier [Axis]: Oceana Australian Fixed Income Trust, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[5],[27],[37] 31,828   31,828    
Investment, Identifier [Axis]: Oceana Australian Fixed Income Trust, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9],[28],[38]     32,224    
Fair value at the ending [3],[5],[27],[37] 14,788   14,788    
Investment, Identifier [Axis]: Oceana Australian Fixed Income Trust, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[28],[38]     14,971    
Investment, Identifier [Axis]: Off Hours Spirits, Inc. / Hour Barrel, LLC, Unitranche Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[39]     197    
Investment, Identifier [Axis]: Off Hours Spirits, Inc. / Hour Barrel, LLC, Unitranche Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[40] 202   202    
Investment, Identifier [Axis]: Onit, Inc., Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 16,779   16,779    
Investment, Identifier [Axis]: Onit, Inc., Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     16,800    
Investment, Identifier [Axis]: Onix Networking Corp., Equity Securities (common stock)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 1,685   $ 1,685    
Number of shares held [22] 2,000,000   2,000,000    
Investment, Identifier [Axis]: Onix Networking Corp., Equity Securities (shares of common stock)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     $ 2,000    
Number of shares held [21]         2,000,000
Investment, Identifier [Axis]: Onix Networking Corp., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12] $ 15,074   15,074    
Investment, Identifier [Axis]: Onix Networking Corp., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Onix Networking Corp., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     14,700    
Investment, Identifier [Axis]: Onix Networking Corp., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Optomi, LLC, Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     447    
Number of shares held [10],[21]         278
Investment, Identifier [Axis]: Optomi, LLC, Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 458   $ 458    
Number of shares held [11],[22] 278   278    
Investment, Identifier [Axis]: Optomi, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     $ 0    
Fair value at the ending [3],[15] $ 0   0    
Investment, Identifier [Axis]: Optomi, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     5,626    
Fair value at the ending [3],[4],[13] 5,584   5,584    
Investment, Identifier [Axis]: Optomi, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     13,114    
Fair value at the ending [3],[13],[14] 13,166   13,166    
Investment, Identifier [Axis]: Oranje Holdco, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     14,105    
Investment, Identifier [Axis]: Oranje Holdco, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Oranje Holdco, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 29,053   29,053    
Investment, Identifier [Axis]: Oranje Holdco, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13] 14,132   14,132    
Investment, Identifier [Axis]: PC Pest Buyer, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 13,755   13,755    
Investment, Identifier [Axis]: PC Pest Buyer, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: PC Pest Buyer, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: PHM Netherlands Midco B.V., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9],[28]     555    
Investment, Identifier [Axis]: PNE Interco LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12],[14] 13,965   13,965    
Investment, Identifier [Axis]: PNE Interco LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: PNE Interco LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 1,765   1,765    
Investment, Identifier [Axis]: Pacific Bells, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     2,902    
Investment, Identifier [Axis]: Panda Acquisition, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     8,239    
Fair value at the ending [3],[4] 7,784   7,784    
Investment, Identifier [Axis]: Park County Holdings, LLC, Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 45,000   45,000    
Investment, Identifier [Axis]: Park County Holdings, LLC, Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     44,325    
Investment, Identifier [Axis]: Parkhub, Inc., Equity Securities (Series A preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] $ 1,500   $ 1,500    
Number of shares held 1,049,936   1,049,936    
Investment, Identifier [Axis]: Parkhub, Inc., Senior Secured Loans (Delayed Draw) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] $ 0   $ 0    
Investment, Identifier [Axis]: Parkhub, Inc., Senior Secured Loans (Delayed Draw) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Parkhub, Inc., Senior Secured Loans (Delayed Draw) 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[15],[19] 0   0    
Investment, Identifier [Axis]: Parkhub, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Parkhub, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 16,042   16,042    
Investment, Identifier [Axis]: Parkhub, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5] 33,459   33,459    
Investment, Identifier [Axis]: Patagonia Holdco LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[5] 14,062   14,062    
Investment, Identifier [Axis]: Patagonia Holdco LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9],[28]     13,520    
Investment, Identifier [Axis]: PetIQ, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9]     9,434    
Fair value at the ending [3],[4],[5] 9,398   9,398    
Investment, Identifier [Axis]: Polychem Acquisition, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     1,903    
Fair value at the ending [3],[4] 1,886   1,886    
Investment, Identifier [Axis]: Power Stop, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 4,873   4,873    
Investment, Identifier [Axis]: PrecisionX Group, LLC (fka Specialty Manufacturing Buyer, LLC), Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: PrecisionX Group, LLC (fka Specialty Manufacturing Buyer, LLC), Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 600   600    
Investment, Identifier [Axis]: PrecisionX Group, LLC (fka Specialty Manufacturing Buyer, LLC), Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[20] 15,880   15,880    
Investment, Identifier [Axis]: PrecisionX Group, LLC (fka Specialty Manufacturing Buyer, LLC), Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 8,105   8,105    
Investment, Identifier [Axis]: PrecisionX Group, LLC (fka Specialty Manufacturing Buyer, LLC), Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 6,004   6,004    
Investment, Identifier [Axis]: Premier Roofing L.L.C., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     3,058    
Fair value at the ending [3],[12] 3,053   3,053    
Investment, Identifier [Axis]: Premier Roofing L.L.C., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     397    
Fair value at the ending [3],[15] 398   398    
Investment, Identifier [Axis]: Project Accelerate Parent, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 11,875   11,875    
Investment, Identifier [Axis]: Project Accelerate Parent, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Project Cloud Holdings, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     12,000    
Investment, Identifier [Axis]: Prototek LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 7,067   7,067    
Investment, Identifier [Axis]: Prototek LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Prototek LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     7,617    
Investment, Identifier [Axis]: Prototek LLC, Senior Secured Loans LLC(Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: QF Holdings, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 400   400    
Investment, Identifier [Axis]: QF Holdings, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     910    
Fair value at the ending [3],[20] 910   910    
Investment, Identifier [Axis]: QF Holdings, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     4,550    
Fair value at the ending [3],[14] 4,550   4,550    
Investment, Identifier [Axis]: QF Holdings, Inc., Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     4,368    
Fair value at the ending [3],[14] 4,368   4,368    
Investment, Identifier [Axis]: QF Holdings, Inc., Senior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     910    
Fair value at the ending [3],[14] 910   910    
Investment, Identifier [Axis]: QF Holdings, Inc., Senior Secured Loans 5          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     910    
Fair value at the ending [3],[14] 910   910    
Investment, Identifier [Axis]: QuarterNorth Energy Inc., Equity Securities (shares of common stock)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[21]     593    
Number of shares held [7],[21]         4,376
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Equity Securities (warrant) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     256    
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Equity Securities (warrant) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     180    
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Equity Securities, Warrant 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] 318   318    
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Equity Securities, Warrant 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] 222   222    
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     857    
Fair value at the ending [3],[12],[14] 852   852    
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     941    
Fair value at the ending [3],[12] 935   935    
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     3,326    
Fair value at the ending [3],[12],[14] 3,307   3,307    
Investment, Identifier [Axis]: Quest Resource Management Group, LLC, Senior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     335    
Fair value at the ending [3],[14] 334   334    
Investment, Identifier [Axis]: RS Acquisition, LLC, Equity Securities (Common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 760   $ 760    
Number of shares held [11],[22] 838,077   838,077    
Investment, Identifier [Axis]: RS Acquisition, LLC, Equity Securities (common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     $ 1,162    
Number of shares held [10],[21]         838,077
Investment, Identifier [Axis]: RS Acquisition, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] $ 846   846    
Investment, Identifier [Axis]: RS Acquisition, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 10,268   10,268    
Investment, Identifier [Axis]: RS Acquisition, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13] 9,488   9,488    
Investment, Identifier [Axis]: RS Acquisition, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     885    
Investment, Identifier [Axis]: RS Acquisition, LLC, Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     10,620    
Investment, Identifier [Axis]: RS Acquisition, LLC, Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     9,812    
Investment, Identifier [Axis]: Radiology Partners, Inc., Junior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[29] 3,804   3,804    
Investment, Identifier [Axis]: Radiology Partners, Inc., Junior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 5,430   5,430    
Investment, Identifier [Axis]: Randys Holdings, Inc, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17],[18]     16,824    
Investment, Identifier [Axis]: Randys Holdings, Inc, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Randys Holdings, Inc, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     654    
Investment, Identifier [Axis]: Randys Holdings, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13],[14] 16,815   16,815    
Investment, Identifier [Axis]: Randys Holdings, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 1,045   1,045    
Investment, Identifier [Axis]: Randys Holdings, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 427   427    
Investment, Identifier [Axis]: Really Great Reading Company, Inc. , Equity Securities, Series A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 391   $ 391    
Number of shares held [22] 369   369    
Investment, Identifier [Axis]: Really Great Reading Company, Inc., Equity Securities (Series A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     $ 466    
Number of shares held [21]         369
Investment, Identifier [Axis]: Really Great Reading Company, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[13] $ 11,969   11,969    
Investment, Identifier [Axis]: Really Great Reading Company, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Really Great Reading Company, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Really Great Reading Company, Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     12,029    
Investment, Identifier [Axis]: Really Great Reading Company, Inc., Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Really Great Reading Company, Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Recorded Future, Inc., Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21],[41]     130    
Number of shares held [21],[41]         40,243
Investment, Identifier [Axis]: Recorded Future, Inc., Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22],[42] $ 127   $ 127    
Number of shares held [22],[42] 40,243   40,243    
Investment, Identifier [Axis]: Recorded Future, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] $ 40,895   $ 40,895    
Investment, Identifier [Axis]: Recorded Future, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Recorded Future, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Recycled Plastics Industries, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     4,363    
Fair value at the ending [3],[14] 4,385   4,385    
Investment, Identifier [Axis]: Recycled Plastics Industries, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Relativity ODA LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13] 5,267   5,267    
Investment, Identifier [Axis]: Relativity ODA LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Relativity ODA LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     5,262    
Investment, Identifier [Axis]: Relativity ODA LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Relevate Health Group, LLC, Equity Securities (Class B common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     0    
Number of shares held [21]         96
Investment, Identifier [Axis]: Relevate Health Group, LLC, Equity Securities (preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     46    
Number of shares held         96
Investment, Identifier [Axis]: Relevate Health Group, LLC, Equity Securities, Class B common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held [22] 96   96    
Investment, Identifier [Axis]: Relevate Health Group, LLC, Equity Securities, Preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] $ 75   $ 75    
Number of shares held 96   96    
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] $ 211   $ 211    
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 1,935   1,935    
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[13] 5,158   5,158    
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12] 866   866    
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     211    
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[17]     5,136    
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans LLC 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     862    
Investment, Identifier [Axis]: Relevate Health Group, LLC, Senior Secured Loans LLC1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     1,927    
Investment, Identifier [Axis]: Renaissance Holding Corp., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     7,518    
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Junior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 4,055   4,055    
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 216   216    
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     3,992    
Investment, Identifier [Axis]: Residential Homes for Rent LLC (warrant to purchase of the equity)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[11],[22] 621   621    
Investment, Identifier [Axis]: Residential Homes for Rent, Equity Securities, series A Preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[11],[22] $ 1,329   $ 1,329    
Number of shares held [5],[11],[22] 446,794   446,794    
Investment, Identifier [Axis]: Respida Software Equity CI LP, Equity Securities (Series B Preferred Units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 5,000   $ 5,000    
Number of shares held [11],[22] 5,000,000   5,000,000    
Investment, Identifier [Axis]: S&S Holdings LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] $ 2,910   $ 2,910    
Investment, Identifier [Axis]: S&S Holdings LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     2,861    
Investment, Identifier [Axis]: SCP Eye Care Holdco, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17]     8,796    
Investment, Identifier [Axis]: SCP Eye Care Holdco, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     4,914    
Investment, Identifier [Axis]: SCP Eye Care Holdco, LLC, Senior Secured Loans (Delayed Draw) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: SCP Eye Care Holdco, LLC, Senior Secured Loans (Delayed Draw) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 5,098   5,098    
Investment, Identifier [Axis]: SCP Eye Care Holdco, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     915    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: SCP Eye Care Holdco, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13] 9,125   9,125    
Investment, Identifier [Axis]: SCP Eye Care Holdco, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 10,248   10,248    
Investment, Identifier [Axis]: SCP Intermediate Holdings, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9]     3,000    
Fair value at the ending [3],[5],[12] 2,984   2,984    
Investment, Identifier [Axis]: SDG Mgmt Company, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     21,021    
Fair value at the ending [3],[4],[12],[20] 21,300   21,300    
Investment, Identifier [Axis]: SDG Mgmt Company, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: SFR Holdco, LLC (Delayed draw junior secured loan)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     4,917 2,316  
Transfers in (out)     0 0  
Purchases (cost)     0 2,071  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     (450) 0  
Fair value at the ending 4,467 4,387 4,467 4,387  
Investment, Identifier [Axis]: SFR Holdco, LLC (Junior secured loan)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     6,557 5,850  
Transfers in (out)     0 0  
Purchases (cost)     0 0  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     (1,145) 0  
Fair value at the ending 5,412 5,850 5,412 5,850  
Investment, Identifier [Axis]: SFR Holdco, LLC (equity commitments 1)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     4,371 3,900  
Transfers in (out)     0 0  
Purchases (cost)     0 0  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     89 0  
Fair value at the ending $ 4,460 $ 3,900 $ 4,460 $ 3,900  
Warrants to purchase percentage of equity 13.90% 13.90% 13.90% 13.90%  
Investment, Identifier [Axis]: SFR Holdco, LLC (equity commitments 2)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     $ 3,278 $ 1,545  
Transfers in (out)     0 0  
Purchases (cost)     0 1,380  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     67 0  
Fair value at the ending $ 3,345 $ 2,925 $ 3,345 $ 2,925  
Warrants to purchase percentage of equity 10.50% 10.50% 10.50% 10.50%  
Investment, Identifier [Axis]: SFR Holdco, LLC, Equity Commitments (equity commitments) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[21]     $ 4,371    
Fair value at the ending [3],[5],[22] $ 4,460   4,460    
Investment, Identifier [Axis]: SFR Holdco, LLC, Equity Commitments (equity commitments) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[21]     3,278    
Fair value at the ending [3],[5],[22] 3,345   3,345    
Investment, Identifier [Axis]: SFR Holdco, LLC, Junior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5] 5,412   5,412    
Investment, Identifier [Axis]: SFR Holdco, LLC, Junior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5] 4,467   4,467    
Investment, Identifier [Axis]: SFR Holdco, LLC, Junior Secured Loans, 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     6,557    
Investment, Identifier [Axis]: SFR Holdco, LLC, Junior Secured Loans, 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     4,917    
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions) (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     47    
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 40   40    
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 1,905   1,905    
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 994   994    
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 1,720   1,720    
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 1,008   1,008    
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans 5          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 985   985    
Investment, Identifier [Axis]: SI Holdings, Inc. (Integrated Polymer Solutions), Senior Secured Loans 6          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[13],[14] 2,192   2,192    
Investment, Identifier [Axis]: SI Holdings, Inc. Senior Secured Loans, (Integrated Polymer Solutions) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     1,915    
Investment, Identifier [Axis]: SI Holdings, Inc. Senior Secured Loans, (Integrated Polymer Solutions) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     1,000    
Investment, Identifier [Axis]: SI Holdings, Inc. Senior Secured Loans, (Integrated Polymer Solutions) 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     1,729    
Investment, Identifier [Axis]: SI Holdings, Inc. Senior Secured Loans, (Integrated Polymer Solutions) 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     1,014    
Investment, Identifier [Axis]: SI Holdings, Inc. Senior Secured Loans, (Integrated Polymer Solutions) 5          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     990    
Investment, Identifier [Axis]: SI Holdings, Inc. Senior Secured Loans, (Integrated Polymer Solutions) 6          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[17],[18]     2,203    
Investment, Identifier [Axis]: SIP Care Services, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: SIP Care Services, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     205    
Fair value at the ending [3] 720   720    
Investment, Identifier [Axis]: SIP Care Services, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 143   143    
Investment, Identifier [Axis]: SIP Care Services, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[14] 3,519   3,519    
Investment, Identifier [Axis]: SIP Care Services, LLC, Senior Secured Loans, 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     136    
Investment, Identifier [Axis]: SIP Care Services, LLC, Senior Secured Loans, 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[18]     3,355    
Investment, Identifier [Axis]: STATS Intermediate Holdings II, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 14,096   14,096    
Investment, Identifier [Axis]: Sabrosura Foods, LLC et a, Senior Secured Loansl 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[14] 4,584   4,584    
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Equity Securities, Class A interests          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held [22] 171,429   171,429    
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Equity Securities, Class AA units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held [22] 7,022   7,022    
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Equity Securities, Class AAA units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held [22] 8,322   8,322    
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     $ 1,266    
Fair value at the ending [3] $ 1,285   1,285    
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[18]     4,518    
Investment, Identifier [Axis]: Sabrosura Foods, LLC et al, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     255    
Fair value at the ending [3],[4] 259   259    
Investment, Identifier [Axis]: Sabrosura Foods, LLC, Equity Securities (Class A interests)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     0    
Number of shares held [21]         171,429
Investment, Identifier [Axis]: Sabrosura Foods, LLC, Equity Securities (Class AA units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     0    
Number of shares held [21]         7,022
Investment, Identifier [Axis]: Sabrosura Foods, LLC, Equity Securities (Class AAA units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     0    
Number of shares held [21]         8,322
Investment, Identifier [Axis]: Sandvine Corporation, Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[22] $ 0   $ 0    
Number of shares held [4],[22] 23,212   23,212    
Investment, Identifier [Axis]: Sandvine Corporation, Equity Securities (Class B units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[22] $ 0   $ 0    
Number of shares held [4],[22] 37,522   37,522    
Investment, Identifier [Axis]: Sandvine Corporation, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[25] $ 224   $ 224    
Investment, Identifier [Axis]: Sandvine Corporation, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     926    
Investment, Identifier [Axis]: Second Avenue SFR Holdings II LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     3,323 $ 4,755  
Transfers in (out)     0 0  
Purchases (cost)     0 0  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     0 6  
Fair value at the ending 3,323 $ 4,761 3,323 4,761  
Investment, Identifier [Axis]: Second Avenue SFR Holdings II LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[9]     3,323    
Fair value at the ending [3],[5],[15] 3,323   3,323    
Investment, Identifier [Axis]: Security Services Acquisition Sub Corp., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 43,965   43,965    
Investment, Identifier [Axis]: Security Services Acquisition Sub Corp., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 13,650   13,650    
Investment, Identifier [Axis]: Security Services Acquisition Sub Corp., Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 13,486   13,486    
Investment, Identifier [Axis]: Securly, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     1,979    
Fair value at the ending [3],[15],[19] 2,478   2,478    
Investment, Identifier [Axis]: Securly, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     967    
Fair value at the ending [3],[15] 966   966    
Investment, Identifier [Axis]: Securly, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     3,693    
Fair value at the ending [3],[14] 3,689   3,689    
Investment, Identifier [Axis]: Securly, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     8,379    
Fair value at the ending [3],[14] 8,369   8,369    
Investment, Identifier [Axis]: Securly, Inc., Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     1,934    
Investment, Identifier [Axis]: Securly, Inc., Senior Secured Loans3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 1,931   1,931    
Investment, Identifier [Axis]: Seran BioScience, LLC, Equity Securities (common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     604    
Fair value at the ending [3],[11],[22] $ 473   $ 473    
Number of shares held 26,666 [11],[22]   26,666 [11],[22]   26,666 [10],[21]
Investment, Identifier [Axis]: Seran BioScience, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     $ 267    
Investment, Identifier [Axis]: Seran BioScience, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] $ 0   0    
Investment, Identifier [Axis]: Seran BioScience, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[14] 1,933   1,933    
Investment, Identifier [Axis]: Seran BioScience, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[20] 1,153   1,153    
Investment, Identifier [Axis]: Seran BioScience, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12] 2,192   2,192    
Investment, Identifier [Axis]: Seran BioScience, LLC, Senior Secured Loans, 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     1,945    
Investment, Identifier [Axis]: Seran BioScience, LLC, Senior Secured Loans, 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     2,206    
Investment, Identifier [Axis]: SheerTrans Solutions, LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning       5,101  
Transfers in (out)       0  
Purchases (cost)       0  
Sales and paydowns (cost)       (25)  
PIK interest (cost)       0  
Discount accretion       9  
Net realized gain (loss)       0  
Net change in unrealized gain (loss)       (28)  
Fair value at the ending   5,057   5,057  
Investment, Identifier [Axis]: SheerTrans Solutions, LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     959 0  
Transfers in (out)     0 0  
Purchases (cost)     0 0  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     19 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     0 0  
Fair value at the ending 978 0 978 0  
Investment, Identifier [Axis]: SheerTrans Solutions, LLC (preferred interests)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     9,192 8,643  
Transfers in (out)     0 0  
Purchases (cost)     3,042 0  
Sales and paydowns (cost)     0 0  
PIK interest (cost)     0 0  
Discount accretion     0 0  
Net realized gain (loss)     0 0  
Net change in unrealized gain (loss)     122 0  
Fair value at the ending $ 12,356 $ 8,643 $ 12,356 $ 8,643  
Number of shares held 12,233,889 8,642,579 12,233,889 8,642,579  
Investment, Identifier [Axis]: SheerTrans Solutions, LLC, Equity Commitments (preferred interests)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     $ 9,192    
Number of shares held [10],[21]         9,191,624
Investment, Identifier [Axis]: SheerTrans Solutions, LLC, Equity Securities, Preferred Interests          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 12,356   $ 12,356    
Number of shares held [11],[22] 12,233,889   12,233,889    
Investment, Identifier [Axis]: SheerTrans Solutions, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     $ 5,101    
Investment, Identifier [Axis]: SheerTrans Solutions, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     959    
Investment, Identifier [Axis]: SheerTrans Solutions, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] $ 978   978    
Investment, Identifier [Axis]: SheerTrans Solutions, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 1,483   1,483    
Investment, Identifier [Axis]: SheerTrans Solutions, LLC, Senior Secured Loans, 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 5,192   5,192    
Investment, Identifier [Axis]: SheerTrans Solutions, LLC-1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     5,101    
Transfers in (out)     0    
Purchases (cost)     0    
Sales and paydowns (cost)     (13)    
PIK interest (cost)     105    
Discount accretion     9    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     (10)    
Fair value at the ending 5,192   5,192    
Investment, Identifier [Axis]: SheerTrans Solutions, LLC-2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     0    
Purchases (cost)     1,436    
Sales and paydowns (cost)     (3)    
PIK interest (cost)     22    
Discount accretion     2    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     26    
Fair value at the ending 1,483   1,483    
Investment, Identifier [Axis]: Signal 88, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 23,148   23,148    
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 896   896    
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc., Senior Secured Loans (Revolver) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc., Senior Secured Loans (Revolver) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12] 9,787   9,787    
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 13,969   13,969    
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc.., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc.., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     13,891    
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc.., Senior Secured Loans, 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[16]     9,733    
Investment, Identifier [Axis]: Skillsoft Corp., Equity Securities (Class A shares)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9],[21],[43]     23    
Fair value at the ending [3],[4],[5],[22],[44] $ 18   $ 18    
Number of shares held 1,308 [4],[5],[22],[44]   1,308 [4],[5],[22],[44]   1,308 [7],[9],[21],[43]
Investment, Identifier [Axis]: Slater Slater Schulman LLP, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     $ 14,001    
Fair value at the ending [3] $ 22,000   22,000    
Investment, Identifier [Axis]: Snap One Holdings Corp., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9]     5,883    
Investment, Identifier [Axis]: Sound Inpatient Physicians, Inc, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[26]     935    
Investment, Identifier [Axis]: Sound Inpatient Physicians, Inc., Junior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[25] 1,872   1,872    
Investment, Identifier [Axis]: Sparq Holdings, Inc., Equity Securities (common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     624    
Fair value at the ending [3],[22] $ 640   $ 640    
Number of shares held 600,000 [22]   600,000 [22]   600,000 [21]
Investment, Identifier [Axis]: Sparq Holdings, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     $ 2,023    
Investment, Identifier [Axis]: Sparq Holdings, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Fair value at the ending [3],[15],[19] $ 0   0    
Investment, Identifier [Axis]: Sparq Holdings, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Sparq Holdings, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 1,982   1,982    
Investment, Identifier [Axis]: Sparq Holdings, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 434   434    
Investment, Identifier [Axis]: Sparq Holdings, Inc., Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 444   444    
Investment, Identifier [Axis]: Specialty Manufacturing Buyer, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     15,960    
Investment, Identifier [Axis]: Specialty Manufacturing Buyer, LLC., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Specialty Manufacturing Buyer, LLC., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Spherix Global Inc. , Equity Securities, Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held [22] 333   333    
Investment, Identifier [Axis]: Spherix Global Inc., Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     $ 143    
Number of shares held [21]         333
Investment, Identifier [Axis]: Spherix Global Inc., Equity Securities (Class A-2 units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 56   $ 56    
Number of shares held [22] 42   42    
Investment, Identifier [Axis]: Spherix Global Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[14] $ 2,888   $ 2,888    
Investment, Identifier [Axis]: Spherix Global Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Spherix Global Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[18]     4,289    
Investment, Identifier [Axis]: Spherix Global Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Sports Operating Holdings II, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 4,931   4,931    
Investment, Identifier [Axis]: Sports Operating Holdings II, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     4,938    
Investment, Identifier [Axis]: Sports Operating Holdings II, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     402    
Investment, Identifier [Axis]: Sports Operating Holdings II, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Sports Operating Holdings II, LLC, Senior Secured Loans, Delayed Draw          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 887   887    
Investment, Identifier [Axis]: Sports Operating Holdings II, LLC, Senior Secured Loans, Revolver          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: StarCompliance MidCo, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     284    
Fair value at the ending [3],[15] 333   333    
Investment, Identifier [Axis]: StarCompliance MidCo, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     383    
Fair value at the ending [3],[13] 384   384    
Investment, Identifier [Axis]: StarCompliance MidCo, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     2,989    
Fair value at the ending [3],[14] 2,996   2,996    
Investment, Identifier [Axis]: StarCompliance MidCo, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     501    
Fair value at the ending [3],[14] 503   503    
Investment, Identifier [Axis]: StormTrap, LLC, Equity Securities (Class A common units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10],[21]     151    
Number of shares held [10],[21]         640,000
Investment, Identifier [Axis]: StormTrap, LLC, Equity Securities (Class A preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[10]     640    
Number of shares held [10]         640,000
Investment, Identifier [Axis]: StormTrap, LLC, Equity Securities, Class A common units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 127   $ 127    
Number of shares held [11],[22] 640,000   640,000    
Investment, Identifier [Axis]: StormTrap, LLC, Equity Securities, Class A preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11] $ 640   $ 640    
Number of shares held [11] 640,000   640,000    
Investment, Identifier [Axis]: StormTrap, LLC, Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12] $ 5,993   $ 5,993    
Investment, Identifier [Axis]: StormTrap, LLC, Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     6,437    
Investment, Identifier [Axis]: StormTrap, LLC, Unitranche Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Streamland Media MidCo LLC, Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[18]     1,941    
Investment, Identifier [Axis]: Streamland Media MidCo LLC, Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     526    
Investment, Identifier [Axis]: Streamland Media MidCo LLC, Senior Secured Loans, One          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[14] 1,884   1,884    
Investment, Identifier [Axis]: Streamland Media MidCo LLC, Senior Secured Loans, Two          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 510   510    
Investment, Identifier [Axis]: Summit Professional Education, LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     0    
Purchases (cost)     10,094    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     2    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     (2)    
Fair value at the ending 10,094   10,094    
Investment, Identifier [Axis]: Summit Professional Education, LLC (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     0    
Purchases (cost)     16,676    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     0    
Fair value at the ending $ 16,676   $ 16,676    
Number of shares held 16,676   16,676    
Investment, Identifier [Axis]: Summit Professional Education, LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     $ 0    
Transfers in (out)     0    
Purchases (cost)     0    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     0    
Fair value at the ending $ 0   0    
Investment, Identifier [Axis]: Summit Professional Education, LLC, Equity Commitments (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[11],[22] $ 16,676   $ 16,676    
Number of shares held [11],[22] 16,676   16,676    
Investment, Identifier [Axis]: Summit Professional Education, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] $ 10,094   $ 10,094    
Investment, Identifier [Axis]: Summit Professional Education, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 299   299    
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 4,148   4,148    
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13] 167   167    
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13] 1,244   1,244    
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     248    
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     4,142    
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     166    
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., Senior Secured Loans LLC3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     1,242    
Investment, Identifier [Axis]: Sundy Village West Mezz Borrower, LLC, Junior Secured Loans (Delayed Draw) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8],[9]     23,870    
Fair value at the ending [3],[5],[15],[19] 27,659   27,659    
Investment, Identifier [Axis]: Sundy Village West Mezz Borrower, LLC, Junior Secured Loans (Delayed Draw) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8],[9]     2,982    
Fair value at the ending [3],[5],[15],[19] 3,284   3,284    
Investment, Identifier [Axis]: TCFIII Owl Buyer LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     4,377    
Fair value at the ending [3],[12],[14] 4,365   4,365    
Investment, Identifier [Axis]: TCFIII Owl Buyer LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     5,344    
Fair value at the ending [3],[12] 5,330   5,330    
Investment, Identifier [Axis]: TCFIII Owl Buyer LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     4,796    
Fair value at the ending [3],[12],[14] 4,784   4,784    
Investment, Identifier [Axis]: TEAM Public Choices, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     4,488    
Investment, Identifier [Axis]: TEAM Public Choices, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 1,494   1,494    
Investment, Identifier [Axis]: TEAM Public Choices, LLC, Senior Secured Loans, 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 4,495   4,495    
Investment, Identifier [Axis]: Talos Energy Inc., Equity Securities, Common Stock          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[5],[22],[44] $ 148   $ 148    
Number of shares held [4],[5],[22],[44] 12,138   12,138    
Investment, Identifier [Axis]: Teneo Holdings LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] $ 7,010   $ 7,010    
Investment, Identifier [Axis]: Teneo Holdings LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     2,979    
Investment, Identifier [Axis]: Tenneco Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[30]     6,290    
Fair value at the ending [3],[4],[12] 9,612   9,612    
Investment, Identifier [Axis]: The Black Tux, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[13],[20] 10,495   10,495    
Investment, Identifier [Axis]: The Black Tux, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: The Black Tux, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: The Black Tux, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     10,421    
Investment, Identifier [Axis]: The Black Tux, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: The Black Tux, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: The GEO Group, Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9]     10,052    
Investment, Identifier [Axis]: The Hertz Corporation, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5] 7,556   7,556    
Investment, Identifier [Axis]: The Hertz Corporation, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5] 1,468   1,468    
Investment, Identifier [Axis]: The Hertz Corporation, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[30]     4,975    
Investment, Identifier [Axis]: The Kyjen Company, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: The Kyjen Company, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[18]     2,934    
Fair value at the ending [3],[4],[14] 2,922   2,922    
Investment, Identifier [Axis]: The Kyjen Company, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     3    
Fair value at the ending [3] 3   3    
Investment, Identifier [Axis]: The Smilist DSO, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 28,150   28,150    
Investment, Identifier [Axis]: The Smilist DSO, LLC, Senior Secured Loans (Delayed Draw) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 6,757   6,757    
Investment, Identifier [Axis]: The Smilist DSO, LLC, Senior Secured Loans (Delayed Draw) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: The Smilist DSO, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Thrasio, LLC, Equity Securities, Common Stock          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 1,378   $ 1,378    
Number of shares held [22] 31,764   31,764    
Investment, Identifier [Axis]: Thrasio, LLC, Junior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25] $ 1,551   $ 1,551    
Investment, Identifier [Axis]: Thrasio, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18],[26]     2,816    
Fair value at the ending [3],[25] 563   563    
Investment, Identifier [Axis]: Thryv, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5] 9,791   9,791    
Investment, Identifier [Axis]: Thryv, Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9]     6,600    
Investment, Identifier [Axis]: TigerConnect, Inc. Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     9,800    
Investment, Identifier [Axis]: TigerConnect, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] 9,863   9,863    
Investment, Identifier [Axis]: TigerConnect, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     444    
Fair value at the ending [3],[15],[19] 624   624    
Investment, Identifier [Axis]: TigerConnect, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Touchmath Acquisition LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 10,004   10,004    
Investment, Identifier [Axis]: Touchmath Acquisition LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Transact Holdings Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     712    
Fair value at the ending [3],[4] 713   713    
Investment, Identifier [Axis]: Transnetwork LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[30]     11,970    
Investment, Identifier [Axis]: Transnetwork LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[29] 13,971   13,971    
Investment, Identifier [Axis]: Transnetwork LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[29] 1,947   1,947    
Investment, Identifier [Axis]: Triad Financial Services, Inc., Equity Commitments (total commitment)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     0    
Purchases (cost)     4,214    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     (313)    
Fair value at the ending [3],[5],[11],[22],[45] 3,901   3,901    
Amount of total commitment [5],[11],[22],[45]     4,214    
Investment, Identifier [Axis]: Trilon Group, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[13],[14],[20] 15,394   15,394    
Investment, Identifier [Axis]: Trilon Group, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     384    
Investment, Identifier [Axis]: Trilon Group, LLC, Senior Secured Loans (Delayed Draw) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Trilon Group, LLC, Senior Secured Loans (Delayed Draw) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Trilon Group, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     56    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Trilon Group, LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     5,418    
Investment, Identifier [Axis]: Trilon Group, LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     4,334    
Investment, Identifier [Axis]: Trilon Group, LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     1,080    
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 9,886   9,886    
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 36   36    
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     126    
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     3,339    
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     620    
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     495    
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans 5          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     550    
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Senior Secured Loans 6          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     705    
Investment, Identifier [Axis]: Unanet, Inc., Equity Securities (common stock)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     2,237    
Fair value at the ending [3],[22] $ 2,431   $ 2,431    
Number of shares held 1,621,053 [22]   1,621,053 [22]   1,621,053 [21]
Investment, Identifier [Axis]: Unanet, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     $ 22,000    
Fair value at the ending [3],[13],[14] $ 22,220   22,220    
Investment, Identifier [Axis]: Unanet, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     2,837    
Fair value at the ending [3],[15],[19] 2,865   2,865    
Investment, Identifier [Axis]: Unanet, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Fair value at the ending [3],[15] 347   347    
Investment, Identifier [Axis]: VB E1, LLC, Unitranche Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     3,000    
Investment, Identifier [Axis]: Valkyrie Buyer, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] 17,868   17,868    
Investment, Identifier [Axis]: Valkyrie Buyer, LLC, Senior Secured Loans (Delayed Draw) 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Valkyrie Buyer, LLC, Senior Secured Loans (Delayed Draw) 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Valkyrie Buyer, LLC, Senior Secured Loans (Delayed Draw) 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Valkyrie Buyer, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Verdantas LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     3,966    
Investment, Identifier [Axis]: Verdantas LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     0    
Investment, Identifier [Axis]: Vero Biotech Inc., Equity Securities (warrant to purchase of the equity)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     0    
Fair value at the ending [3],[22] $ 327   $ 327    
Warrants to purchase percentage of equity [22] 2.30%   2.30%    
Investment, Identifier [Axis]: Vero Biotech Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     $ 29,700    
Fair value at the ending [3] $ 30,000   30,000    
Investment, Identifier [Axis]: Vhagar Purchaser, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13] 10,038   10,038    
Investment, Identifier [Axis]: Vhagar Purchaser, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 502   502    
Investment, Identifier [Axis]: Vhagar Purchaser, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Vhagar Purchaser, LLC, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17]     10,000    
Investment, Identifier [Axis]: Vhagar Purchaser, LLC, Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     500    
Investment, Identifier [Axis]: Vhagar Purchaser, LLC, Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Viad Corp, Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7],[9]     4,038    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC (fka Vice Group Holding Inc.), Equity Securities, Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 0   $ 0    
Number of shares held [22] 1,110,000   1,110,000    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC (fka Vice Group Holding Inc.), Junior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21],[46]     $ 0    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC (fka Vice Group Holding Inc.), Junior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21],[46]     0    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC (fka Vice Group Holding Inc.), Junior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21],[46]     0    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC (fka Vice Group Holding Inc.), Junior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21],[46]     0    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC (fka Vice Group Holding Inc.), Junior Secured Loans 5          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     348    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC (fka Vice Group Holding Inc.), Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     219    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC (fka Vice Group Holding Inc.), Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     494    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC (fka Vice Group Holding Inc.), Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     149    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC (fka Vice Group Holding Inc.),Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     453    
Number of shares held [21]         1,110,000
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC, Junior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25],[47] $ 0   0    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC, Junior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25],[47] 0   0    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC, Junior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25],[47] 0   0    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC, Junior Secured Loans 4          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25],[47] 0   0    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC, Junior Secured Loans 5          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25] 411   411    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC, Junior Secured Loans 6          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25] 124   124    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC, Junior Secured Loans 7          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25] 216   216    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC, Junior Secured Loans 8          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25] 64   64    
Investment, Identifier [Axis]: Vice Acquisition Holdco, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[25] 312   312    
Investment, Identifier [Axis]: Volt Bidco, Inc., Equity Securities (shares of common stock)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21]     1,144    
Number of shares held [21]         878
Investment, Identifier [Axis]: Volt Bidco, Inc., Equity Securities, Common stock          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 1,215   $ 1,215    
Number of shares held [22] 878   878    
Investment, Identifier [Axis]: Volt Bidco, Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8]     $ 304    
Fair value at the ending [3],[15],[19] $ 987   987    
Investment, Identifier [Axis]: Volt Bidco, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     268    
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Volt Bidco, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     9,136    
Fair value at the ending [3],[14] 9,136   9,136    
Investment, Identifier [Axis]: Volt Bidco, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     1,717    
Fair value at the ending [3] 1,717   1,717    
Investment, Identifier [Axis]: W3 Monroe RE Debt LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     2,199    
Investment, Identifier [Axis]: W3 Monroe RE Debt LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8],[9]     107    
Investment, Identifier [Axis]: WPEngine, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[13],[14] 16,632   16,632    
Investment, Identifier [Axis]: WPEngine, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: WPEngine, Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[17],[18]     16,550    
Investment, Identifier [Axis]: WPEngine, Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Watchguard Technologies, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     20,113    
Fair value at the ending [3],[4] 20,719   20,719    
Investment, Identifier [Axis]: WebPT, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     5,000    
Fair value at the ending [3],[14] 5,000   5,000    
Investment, Identifier [Axis]: WebPT, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     124    
Fair value at the ending [3],[15] 74   74    
Investment, Identifier [Axis]: Whistler Parent Holdings III, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     2,630    
Fair value at the ending [3] 2,607   2,607    
Investment, Identifier [Axis]: Whistler Parent Holdings III, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 20,853   20,853    
Investment, Identifier [Axis]: Whistler Parent Holdings III, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 261   261    
Investment, Identifier [Axis]: Whistler Parent Holdings III, Inc., Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] 754   754    
Investment, Identifier [Axis]: Whistler Parent Holdings III, Inc., Senior Secured Loans, 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     21,040    
Investment, Identifier [Axis]: Whistler Parent Holdings III, Inc., Senior Secured Loans, 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     263    
Investment, Identifier [Axis]: Witkoff/Monroe 700 JV LLC, Equity Securities (preferred units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[10]     3,007    
Number of shares held [9],[10]         2,992
Investment, Identifier [Axis]: Witkoff/Monroe 700 JV LLC, Equity Securities, Preferred units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[11],[22] $ 4,171   $ 4,171    
Number of shares held [5],[11],[22] 2,992   2,992    
Investment, Identifier [Axis]: Witkoff/Monroe 700 JV LLC, Junior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8],[9]     $ 1,895    
Fair value at the ending [3],[5],[15],[19] $ 1,468   1,468    
Investment, Identifier [Axis]: Witkoff/Monroe 700 JV LLC, Junior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     9,493    
Fair value at the ending [3],[5] 9,717   9,717    
Investment, Identifier [Axis]: Witkoff/Monroe 700 JV LLC, Junior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9]     1,642    
Fair value at the ending [3],[5] 1,681   1,681    
Investment, Identifier [Axis]: Witkoff/Monroe 700 JV LLC, Junior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5] 3,016   3,016    
Investment, Identifier [Axis]: XanEdu Publishing, Inc. , Equity Securities, Class A units          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3] $ 389   $ 389    
Number of shares held 65,104   65,104    
Investment, Identifier [Axis]: XanEdu Publishing, Inc., Equity Securities (Class A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2]     $ 296    
Number of shares held         65,104
Investment, Identifier [Axis]: XanEdu Publishing, Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] $ 0   0    
Investment, Identifier [Axis]: XanEdu Publishing, Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12],[14] 5,750   5,750    
Investment, Identifier [Axis]: XanEdu Publishing, Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[12] 2,285   2,285    
Investment, Identifier [Axis]: XanEdu Publishing, Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: XanEdu Publishing, Inc., Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16],[18]     5,844    
Investment, Identifier [Axis]: XanEdu Publishing, Inc., Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[16]     2,326    
Investment, Identifier [Axis]: Xpress Wellness, LLC, Equity Securities (Series A units)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 13,675   $ 13,675    
Number of shares held [22] 13,675   13,675    
Investment, Identifier [Axis]: Xpress Wellness, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4],[12] $ 39,200   $ 39,200    
Investment, Identifier [Axis]: Xpress Wellness, LLC, Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15],[19] 0   0    
Investment, Identifier [Axis]: Xpress Wellness, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 2,412   2,412    
Investment, Identifier [Axis]: ZI Intermediate II, Inc., Equity Securities (common stock)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22] $ 3,790   $ 3,790    
Number of shares held [22] 3,790   3,790    
Investment, Identifier [Axis]: ZI Intermediate II, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] $ 55,962   $ 55,962    
Investment, Identifier [Axis]: ZI Intermediate II, Inc., Senior Secured Loans(Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: Zodega Landscaping, LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     11,969    
Transfers in (out)     0    
Purchases (cost)     0    
Sales and paydowns (cost)     (60)    
PIK interest (cost)     0    
Discount accretion     43    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     473    
Fair value at the ending 12,425   12,425    
Investment, Identifier [Axis]: Zodega Landscaping, LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     0    
Transfers in (out)     0    
Purchases (cost)     0    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     0    
Fair value at the ending 0   0    
Investment, Identifier [Axis]: Zodega Landscaping, LLC (preferred interests)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning     12,421    
Transfers in (out)     0    
Purchases (cost)     0    
Sales and paydowns (cost)     0    
PIK interest (cost)     0    
Discount accretion     0    
Net realized gain (loss)     0    
Net change in unrealized gain (loss)     42    
Fair value at the ending $ 12,463   $ 12,463    
Number of units held 124,206   124,206    
Investment, Identifier [Axis]: Zodega Landscaping, LLC, Equity Commitments (preferred interests)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[21],[48]     $ 12,421    
Number of shares held [21],[48]         124,206
Investment, Identifier [Axis]: Zodega Landscaping, LLC, Equity Securities, Preferred interests          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[22],[49] $ 12,463   $ 12,463    
Number of shares held [49] 124,206   124,206    
Investment, Identifier [Axis]: Zodega Landscaping, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[4] $ 12,425   $ 12,425    
Investment, Identifier [Axis]: Zodega Landscaping, LLC, Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[7]     11,969    
Investment, Identifier [Axis]: Zodega Landscaping, LLC, Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6]     0    
Investment, Identifier [Axis]: Zodega Landscaping, LLC, Senior Secured Loans, Revolver          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[15] 0   0    
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Equity Securities (preferred shares)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[21],[28]     761    
Fair value at the ending [3],[5],[22],[27] $ 727   $ 727    
Number of shares held 96,603 [5],[22],[27]   96,603 [5],[22],[27]   96,603 [9],[21],[28]
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Senior Secured Loans (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[15],[27] $ 842   $ 842    
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Senior Secured Loans (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[15],[27] 0   0    
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Senior Secured Loans 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[14],[27] 16,535   16,535    
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Senior Secured Loans 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[14],[27] 1,291   1,291    
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Senior Secured Loans 3          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[5],[27] 2,063   2,063    
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Senior Secured Loans LLC (Delayed Draw)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[8],[9],[28]     1,677    
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Senior Secured Loans LLC (Revolver)          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[6],[9],[28]     0    
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Senior Secured Loans LLC 1          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[18],[28]     16,535    
Investment, Identifier [Axis]: ecMarket Inc. and Conexiom US Inc., Senior Secured Loans LLC 2          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[9],[18],[28]     1,291    
Investment, Identifier [Axis]: iCIMS, Inc., Senior Secured Loans          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the ending [3],[14] $ 8,050   8,050    
Investment, Identifier [Axis]: iCIMS, Inc., Senior Secured Loans LLC          
Transactions with Affiliated Companies, Fair value Roll Forward          
Fair value at the beginning [2],[18]     $ 8,030    
[1] All of the Company’s investments are issued by eligible portfolio companies, as defined in the Investment Company Act of 1940, as amended, (the “1940 Act”), unless otherwise noted. All of the Company’s investments are issued by U.S. portfolio companies unless otherwise noted.
[2] Except as otherwise noted, because there is no readily available market value for these investments, the fair value of each of these investments is determined in good faith using significant unobservable inputs by the Valuation Designee. (See Note 4 in the accompanying notes to the consolidated financial statements.)
[3] Except as otherwise noted, because there is no readily available market value for these investments, the fair value of each of these investments is determined in good faith using significant unobservable inputs by the Valuation Designee. (See Note 4 in the accompanying notes to the consolidated financial statements).
[4] All or a portion of this security was held in MC Income Plus Financing SPV LLC (the “SPV”) as collateral for the Company’s secured revolving credit facility (the “SPV Credit Facility”) with KeyBank National Association. (See Note 7 in the accompanying notes to the consolidated financial statements).
[5] This investment is treated as a non-qualifying investment under Section 55(a) of the 1940 Act. Under the 1940 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, 2024, non-qualifying assets totaled 12.6% of the Company’s total assets.
[6] All or a portion of this commitment was unfunded at December 31, 2023. As such, interest is earned only on the funded portion of this commitment.
[7] All or a portion of this security was held in MC Income Plus Financing SPV LLC (the “SPV”) as collateral for the Company's secured revolving credit facility (the “SPV Credit Facility”) with KeyBank National Association. (See Note 7 in the accompanying notes to the consolidated financial statements).
[8] This delayed draw loan requires that certain financial covenants be met by the portfolio company prior to any fundings by the Company.
[9] This investment is treated as a non-qualifying investment under Section 55(a) of the 1940 Act. Under the 1940 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 December 31, 2023, non-qualifying assets totaled 13.9% of the Company’s total assets.
[10] Investment is held by a taxable subsidiary of the Company. See Note 2 in the accompanying notes to the consolidated financial statements for additional information on the Company’s wholly-owned taxable subsidiaries.
[11] Investment is held by a taxable subsidiary of the Company. See Note 2 in the accompanying notes to the consolidated financial statements for additional information on the Company’s wholly-owned taxable subsidiaries.
[12] All or a portion of this security was held in MC Income Plus Financing SPV II LLC (the “SPV II”) as collateral for the Company’s secured term loan credit facility (the “Term Loan”) with KeyBank National Association. (See Note 7 in the accompanying notes to the consolidated financial statements).
[13] All or a portion of this security was held in Monroe Capital Income Plus ABS Funding II, LLC (the “2023 Issuer”) as collateral for the Company’s $251,169 asset-backed securitization (the “2023 ABS”). (See Note 7 in the accompanying notes to the consolidated financial statements).
[14] All or a portion of this security was held in Monroe Capital Income Plus ABS Funding, LLC (the “2022 Issuer”) as collateral for the Company’s $425,000 asset-backed securitization (the “2022 ABS”). (See Note 7 in the accompanying notes to the consolidated financial statements).
[15] All or a portion of this commitment was unfunded at June 30, 2024. As such, interest is earned only on the funded portion of this commitment.
[16] All or a portion of this security was held in MC Income Plus Financing SPV II LLC (the “SPV II”) as collateral for the Company's secured term loan credit facility (the “Term Loan”) with KeyBank National Association. (See Note 7 in the accompanying notes to the consolidated financial statements).
[17] All or a portion of this security was held in Monroe Capital Income Plus ABS Funding II, LLC (the “2023 Issuer”) as collateral for the Company's $251,169 asset-backed securitization (the “2023 ABS”). (See Note 7 in the accompanying notes to the consolidated financial statements).
[18] All or a portion of this security was held in Monroe Capital Income Plus ABS Funding, LLC (the “2022 Issuer”) as collateral for the Company's $425,000 asset-backed securitization (the “2022 ABS”). (See Note 7 in the accompanying notes to the consolidated financial statements).
[19] This delayed draw loan requires that certain financial covenants be met by the portfolio company prior to any fundings by the Company.
[20] All or a portion of this security was held in MC Income Plus Financing SPV III LLC (the “SPV III”) as collateral for the Company’s secured revolving credit facility (the “SPV III Credit Facility”) with Goldman Sachs Bank USA. (See Note 7 in the accompanying notes to the consolidated financial statements).
[21] Represents a non-income producing security.
[22] Represents a non-income producing security.
[23] This loan is denominated in Canadian dollars and is translated into U.S. dollars as of the valuation date.
[24] This loan is denominated in Canadian dollars and is translated into U.S. dollars as of the valuation date.
[25] This position was on non-accrual status as of June 30, 2024, meaning that the Company has ceased accruing interest income on the position. See Note 2 in the accompanying notes to the consolidated financial statements for additional information on the Company’s accounting policies.
[26] This position was on non-accrual status as of December 31, 2023, meaning that the Company has ceased accruing interest income on the position. See Note 2 in the accompanying notes to the consolidated financial statements for additional information on the Company’s accounting policies.
[27] This is an international company.
[28] This is an international company.
[29] Investment position or portion thereof unsettled as of June 30, 2024.
[30] Investment position or portion thereof unsettled as of December 31, 2023.
[31] This investment is subject to a servicing agreement whereby the Company earns an effective yield of 18.05% net of servicing fees.
[32] This investment is subject to a servicing agreement whereby the Company earns an effective yield of 18.4% net of servicing fees.
[33] As of December 31, 2023, the Company was party to a subscription agreement with a commitment to fund an additional equity investment of $34.
[34] As of June 30, 2024, the Company was party to a subscription agreement with a commitment to fund an additional equity investment of $34.
[35] As of December 31, 2023, the Company was party to a subscription agreement with a commitment to fund an additional equity investment of $697.
[36] As of June 30, 2024, the Company was party to a subscription agreement with a commitment to fund an additional equity investment of $697.
[37] This loan is denominated in Australian dollars and is translated into U.S. dollars as of the valuation date.
[38] This loan is denominated in Australian dollars and is translated into U.S. dollars as of the valuation date.
[39] This investment is subject to a servicing agreement whereby the Company earns an effective yield of 15.71% net of servicing fees.
[40] This investment is subject to a servicing agreement whereby the Company earns an effective yield of 15.3% net of servicing fees.
[41] As of December 31, 2023, the Company was party to a subscription agreement with a commitment to fund an additional equity investment of $8.
[42] As of June 30, 2024, the Company was party to a subscription agreement with a commitment to fund an additional equity investment of $8.
[43] The fair value of this investment was valued using Level 1 inputs. See Note 4 in the accompanying notes to the consolidated financial statements.
[44] The fair value of this investment was valued using Level 1 inputs. See Note 4 in the accompanying notes to the consolidated financial statements.
[45] As of June 30, 2024, the Company was party to a subscription agreement with a commitment to fund an additional equity investment of $37,641 for a total commitment of $41,855.
[46] This is a demand note with no stated maturity.
[47] This is a demand note with no stated maturity.
[48] As of December 31, 2023, the Company was party to a subscription agreement with a commitment to fund an additional equity investment of $1,468.
[49] As of June 30, 2024, the Company was party to a subscription agreement with a commitment to fund an additional equity investment of $1,468.
(34)     This loan is denominated in Great Britain Pounds and is translated into U.S. dollars as of the valuation date.