v3.26.3
Investments - Individual Investments in the Portfolios of SLP III, Principal Amount, Cost and Fair Value (Details)
€ in Thousands, £ in Thousands, $ in Thousands
Sep. 30, 2026
USD ($)
Sep. 30, 2026
EUR (€)
 [3],[4],[9],[20],[52]
Sep. 30, 2026
GBP (£)
 [3],[4],[9],[20],[52]
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
 [7],[8],[11]
Dec. 31, 2025
GBP (£)
 [7],[8],[11],[16],[51]
Dec. 31, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
May 03, 2013
USD ($)
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost $ 2,453,990 [1]     $ 2,912,115 [2]              
Fair Value 2,259,962 [1]     2,742,013 [2]              
Investment, Identifier [Axis]: AAC Lender Holdings, LLC | Ordinary Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[5] 0                    
Fair Value [3],[4],[5] 0                    
Investment, Identifier [Axis]: AAC Lender Holdings, LLC | Ordinary shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [6],[7],[8]       0              
Fair Value [6],[7],[8]       0              
Investment, Identifier [Axis]: AAH Topco, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,659 [3],[4],[9],[10]     3,659 [7],[8],[11],[12]              
Cost (37) [3],[4],[10]     (37) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: AAH Topco, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,426 [3],[9],[13]     22,502 [7],[11],[14],[15]              
Cost 9,402 [3],[13]     22,398 [7],[14],[15]              
Fair Value 9,426 [3],[13]     22,502 [7],[14],[15]              
Investment, Identifier [Axis]: AAH Topco, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,244 [3],[9],[13]     20,009 [7],[8],[11],[16]              
Cost 7,223 [3],[13]     19,932 [7],[8],[16]              
Fair Value 7,244 [3],[13]     20,009 [7],[8],[16]              
Investment, Identifier [Axis]: AAH Topco, LLC | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,955 [3],[9],[17],[18]     9,500 [7],[11],[19]              
Cost 5,938 [3],[17],[18]     9,463 [7],[19]              
Fair Value 5,955 [3],[17],[18]     9,500 [7],[19]              
Investment, Identifier [Axis]: AAH Topco, LLC | First lien 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,482 [3],[4],[9],[20]     7,300 [7],[11],[19]              
Cost 3,474 [3],[4],[20]     7,267 [7],[19]              
Fair Value 3,482 [3],[4],[20]     7,300 [7],[19]              
Investment, Identifier [Axis]: AAH Topco, LLC | Subordinated 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,543 [3],[9],[13]     17,649 [7],[8],[11],[16]              
Cost 7,499 [3],[13]     17,527 [7],[8],[16]              
Fair Value 7,430 [3],[13]     17,418 [7],[8],[16]              
Investment, Identifier [Axis]: AAH Topco, LLC | Subordinated 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 888 [3],[4],[9],[20]     6,921 [7],[11],[19]              
Cost 883 [3],[4],[20]     6,873 [7],[19]              
Fair Value 875 [3],[4],[20]     6,831 [7],[19]              
Investment, Identifier [Axis]: ACI Group Holdings, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       2,330              
Cost [7],[8],[12]       2,307              
Fair Value [7],[8],[12]       1,864              
Investment, Identifier [Axis]: ACI Group Holdings, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12],[21]       24              
Cost [7],[8],[12],[21]       0              
Fair Value [7],[8],[12],[21]       (5)              
Investment, Identifier [Axis]: ACI Group Holdings, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       22,643              
Cost [7],[14],[15]       22,547              
Fair Value [7],[14],[15]       18,114              
Investment, Identifier [Axis]: ACI Group Holdings, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       4,346              
Cost [7],[8],[16]       4,319              
Fair Value [7],[8],[16]       3,477              
Investment, Identifier [Axis]: ACI Group Holdings, Inc. | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       4,014              
Cost [7],[8],[16]       3,994              
Fair Value [7],[8],[16]       3,211              
Investment, Identifier [Axis]: ACI Parent Inc. | Preferred shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       20,249              
Cost [7],[8],[21]       20,124              
Fair Value [7],[8],[21]       2,087              
Investment, Identifier [Axis]: AI Altius US Bidco, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       3,062              
Cost [7],[8],[16]       3,051              
Fair Value [7],[8],[16]       3,062              
Investment, Identifier [Axis]: AI Altius US Bidco, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       3,077              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: AWP Group Holdings, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 8,697                    
Cost [3],[17],[18] 8,666                    
Fair Value [3],[17],[18] 8,664                    
Investment, Identifier [Axis]: AWP Group Holdings, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[20] 405                    
Cost [3],[4],[10],[20] 403                    
Fair Value [3],[4],[10],[20] 403                    
Investment, Identifier [Axis]: AWP Group Holdings, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 959                    
Cost [3],[4],[10] (4)                    
Fair Value [3],[4],[10] (4)                    
Investment, Identifier [Axis]: Acumatica Holdings, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,759 [3],[9],[17],[18]     39,188 [7],[11],[14],[15]              
Cost 13,759 [3],[17],[18]     39,188 [7],[14],[15]              
Fair Value 13,713 [3],[17],[18]     39,188 [7],[14],[15]              
Investment, Identifier [Axis]: Acumatica Holdings, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,403 [3],[4],[9],[10]     9,403 [7],[8],[11],[12]              
Cost 0 [3],[4],[10]     0 [7],[8],[12]              
Fair Value (31) [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Adelaide Borrower, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,780 [3],[4],[9],[20]     4,780 [7],[8],[11],[16]              
Cost 4,748 [3],[4],[20]     4,743 [7],[8],[16]              
Fair Value 4,780 [3],[4],[20]     4,780 [7],[8],[16]              
Investment, Identifier [Axis]: Adelaide Borrower, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 288 [3],[4],[9],[10],[20]     120 [7],[8],[11],[12],[16]              
Cost 285 [3],[4],[10],[20]     119 [7],[8],[12],[16]              
Fair Value 288 [3],[4],[10],[20]     120 [7],[8],[12],[16]              
Investment, Identifier [Axis]: Adelaide Borrower, LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 760 [3],[4],[9],[10]     1,048 [7],[8],[11],[12]              
Cost 0 [3],[4],[10]     0 [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Adelaide Borrower, LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 667 [3],[4],[9],[10]     547 [7],[8],[11],[12]              
Cost (7) [3],[4],[10]     (5) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Alegeus Technologies Holdings Corp. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       8,382              
Cost [7],[8],[16]       8,297              
Fair Value [7],[8],[16]       8,382              
Investment, Identifier [Axis]: Ambrosia Holdco Corp. | Class A-1 Common Units 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[18] 1,348                    
Fair Value [3],[18] 37                    
Investment, Identifier [Axis]: Ambrosia Holdco Corp. | Class A-1 Common Units 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4] 1,300                    
Fair Value [3],[4] 36                    
Investment, Identifier [Axis]: Ambrosia Topco LLC | Class A-1 common units 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[15]       1,348              
Fair Value [7],[15]       590              
Investment, Identifier [Axis]: Ambrosia Topco LLC | Class A-1 common units 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8]       1,300              
Fair Value [7],[8]       569              
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,969 [3],[4],[9],[10]     1,969 [7],[8],[11],[12]              
Cost (10) [3],[4],[10]     (10) [7],[8],[12]              
Fair Value (109) [3],[4],[10]     (15) [7],[8],[12]              
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 18,623 [3],[4],[9],[20]     18,769 [7],[8],[11],[16]              
Cost 18,596 [3],[4],[20]     18,729 [7],[8],[16]              
Fair Value 17,589 [3],[4],[20]     18,626 [7],[8],[16]              
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,183 [3],[9],[17],[18]     5,223 [7],[11],[14],[15]              
Cost 5,174 [3],[17],[18]     5,211 [7],[14],[15]              
Fair Value 4,895 [3],[17],[18]     5,183 [7],[14],[15]              
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc. | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 681 [3],[4],[9],[20]     686 [7],[8],[11],[16]              
Cost 679 [3],[4],[20]     684 [7],[8],[16]              
Fair Value 643 [3],[4],[20]     681 [7],[8],[16]              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.) | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 31,406                    
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.) | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,652 [3],[4],[5],[9],[10]     2,652 [6],[7],[8],[11],[12]              
Cost 0 [3],[4],[5],[10]     0 [6],[7],[8],[12]              
Fair Value 0 [3],[4],[5],[10]     0 [6],[7],[8],[12]              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.) | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 29,879 [3],[4],[9],[20]     29,879 [7],[8],[11],[16]              
Cost 29,842 [3],[4],[20]     29,842 [7],[8],[16]              
Fair Value 16,000 [3],[4],[20]     17,999 [7],[8],[16]              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.) | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,527 [3],[4],[9]     1,527 [7],[8],[11]              
Cost 1,527 [3],[4]     1,527 [7],[8]              
Fair Value 0 [3],[4]     0 [7],[8]              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.) | First lien | Non-accrual status                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount               $ 17,927 $ 13,479    
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.) | Subordinated                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,230 [3],[4],[9]     5,230 [7],[8],[11]              
Cost 0 [3],[4]     0 [7],[8]              
Fair Value 0 [3],[4]     0 [7],[8]              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.) | Subordinated | Non-accrual status                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount                   $ 5,230  
Investment, Identifier [Axis]: Anaplan, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       10,513              
Cost [7],[14],[15]       10,456              
Fair Value [7],[14],[15]       10,513              
Investment, Identifier [Axis]: Associations Finance, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 29,794                    
Cost [3],[4],[20] 29,787                    
Fair Value [3],[4],[20] 29,794                    
Investment, Identifier [Axis]: Associations Finance, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 2,199                    
Cost [3],[4],[10] 2,198                    
Fair Value [3],[4],[10] 2,199                    
Investment, Identifier [Axis]: Associations Finance, Inc. | Subordinated 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9] 10,200                    
Cost [3],[4] 10,187                    
Fair Value [3],[4] 10,200                    
Investment, Identifier [Axis]: Associations Finance, Inc. | Subordinated 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9] 3,895                    
Cost [3],[4] 3,890                    
Fair Value [3],[4] 3,895                    
Investment, Identifier [Axis]: Associations, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       48,932              
Cost [7],[8],[16]       48,915              
Fair Value [7],[8],[16]       48,932              
Investment, Identifier [Axis]: Associations, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,639              
Cost [7],[8],[12]       1,639              
Fair Value [7],[8],[12]       1,639              
Investment, Identifier [Axis]: Associations, Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,612 [3],[4],[9],[10]     2,186 [7],[8],[11],[12]              
Cost (1) [3],[4],[10]     (1) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Associations, Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,077 [3],[4],[9],[10]     3,077 [7],[8],[11],[12]              
Cost (2) [3],[4],[10]     (2) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Associations, Inc. | Subordinated 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11]       9,173              
Cost [7],[8]       9,158              
Fair Value [7],[8]       9,356              
Investment, Identifier [Axis]: Associations, Inc. | Subordinated 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11]       3,503              
Cost [7],[8]       3,497              
Fair Value [7],[8]       3,593              
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12],[22]       790              
Cost [7],[8],[12],[22]       (6)              
Fair Value [7],[8],[12],[22]       0              
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,429 [3],[9],[17],[18]     4,463 [7],[11],[14],[15]              
Cost 4,421 [3],[17],[18]     4,453 [7],[14],[15]              
Fair Value 4,429 [3],[17],[18]     4,463 [7],[14],[15]              
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,385 [3],[4],[9],[20]     3,411 [7],[8],[11],[16]              
Cost 3,357 [3],[4],[20]     3,377 [7],[8],[16]              
Fair Value 3,385 [3],[4],[20]     3,411 [7],[8],[16]              
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,318 [3],[4],[9],[20]     1,328 [7],[8],[11],[16]              
Cost 1,310 [3],[4],[20]     1,319 [7],[8],[16]              
Fair Value 1,318 [3],[4],[20]     1,328 [7],[8],[16]              
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd| First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[23] 790                    
Cost [3],[4],[10],[23] (6)                    
Fair Value [3],[4],[10],[23] 0                    
Investment, Identifier [Axis]: Auctane Inc. (fka Stamps.com Inc.) | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 31,814 [3],[4],[9],[20]     36,155 [7],[8],[11],[16]              
Cost 31,584 [3],[4],[20]     35,985 [7],[8],[16]              
Fair Value 31,576 [3],[4],[20]     36,155 [7],[8],[16]              
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[20] 2,383                    
Cost [3],[4],[10],[20] 2,367                    
Fair Value [3],[4],[10],[20] 2,383                    
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 1,324                    
Cost [3],[4],[10] (10)                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       2,122              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       3,707              
Cost [7],[8],[12]       (26)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 15,484 [3],[9],[17],[18]     15,602 [7],[11],[14],[15]              
Cost 15,398 [3],[17],[18]     15,504 [7],[14],[15]              
Fair Value 15,484 [3],[17],[18]     15,602 [7],[14],[15]              
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,739 [3],[9],[17],[18]     5,782 [7],[11],[14],[15]              
Cost 5,715 [3],[17],[18]     5,756 [7],[14],[15]              
Fair Value 5,739 [3],[17],[18]     5,782 [7],[14],[15]              
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,488 [3],[4],[9],[20]     378 [7],[8],[11],[16]              
Cost 2,476 [3],[4],[20]     376 [7],[8],[16]              
Fair Value 2,488 [3],[4],[20]     378 [7],[8],[16]              
Investment, Identifier [Axis]: Bamboo Health Holdings, LLC (f/k/a Appriss Health, LLC) | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,035 [3],[4],[9],[20]     3,046 [7],[8],[11],[16]              
Cost 3,031 [3],[4],[20]     3,038 [7],[8],[16]              
Fair Value 3,035 [3],[4],[20]     3,046 [7],[8],[16]              
Investment, Identifier [Axis]: Bamboo Health Holdings, LLC (f/k/a Appriss Health, LLC) | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 417 [3],[4],[9],[10]     417 [7],[8],[11],[12]              
Cost (4) [3],[4],[10]     (4) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Bonterra LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       14,989              
Cost [7],[14],[15]       14,955              
Fair Value [7],[14],[15]       14,952              
Investment, Identifier [Axis]: Bonterra LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 521                    
Cost [3],[4],[10] 520                    
Fair Value [3],[4],[10] 512                    
Investment, Identifier [Axis]: Bonterra LLC | First lien - Drawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12],[16]       1,629              
Cost [7],[8],[12],[16]       1,629              
Fair Value [7],[8],[12],[16]       1,625              
Investment, Identifier [Axis]: Bonterra LLC | First lien - Drawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       244              
Cost [7],[8],[12]       244              
Fair Value [7],[8],[12]       244              
Investment, Identifier [Axis]: Bonterra LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 1,107                    
Cost [3],[4],[10] (3)                    
Fair Value [3],[4],[10] (19)                    
Investment, Identifier [Axis]: Bonterra LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       0              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Bonterra LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,384              
Cost [7],[8],[12]       (3)              
Fair Value [7],[8],[12]       (3)              
Investment, Identifier [Axis]: Bonterra LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 14,876                    
Cost [3],[17],[18] 14,846                    
Fair Value [3],[17],[18] 14,615                    
Investment, Identifier [Axis]: Bonterra LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 1,620                    
Cost [3],[4],[20] 1,620                    
Fair Value [3],[4],[20] 1,592                    
Investment, Identifier [Axis]: Brave Parent Holdings, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 20,963 [3],[9],[24]     21,124 [7],[11],[25]              
Cost 20,890 [3],[24]     21,040 [7],[25]              
Fair Value 20,542 [3],[24]     21,124 [7],[25]              
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 125 [3],[4],[9],[10]     125 [7],[8],[11],[12]              
Cost 127 [3],[4],[10]     127 [7],[8],[12]              
Fair Value 125 [3],[4],[10]     125 [7],[8],[12]              
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 811                    
Cost [3],[4],[10] (6)                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       822              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       811              
Cost [7],[8],[12]       (6)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 8,879 [3],[9],[17],[18]     13,206 [7],[11],[14],[15]              
Cost 8,961 [3],[17],[18]     13,177 [7],[14],[15]              
Fair Value 8,879 [3],[17],[18]     13,206 [7],[14],[15]              
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,398 [3],[9],[17],[18]     8,879 [7],[11],[14],[15]              
Cost 3,395 [3],[17],[18]     8,976 [7],[14],[15]              
Fair Value 3,398 [3],[17],[18]     8,879 [7],[14],[15]              
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,025 [3],[4],[9],[20]     3,398 [7],[11],[14],[15]              
Cost 1,023 [3],[4],[20]     3,395 [7],[14],[15]              
Fair Value 1,025 [3],[4],[20]     3,398 [7],[14],[15]              
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 761 [3],[9],[17],[18]     1,025 [7],[8],[11],[16]              
Cost 759 [3],[17],[18]     1,023 [7],[8],[16]              
Fair Value 761 [3],[17],[18]     1,025 [7],[8],[16]              
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien 5                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 341 [3],[9],[17],[18]     761 [7],[11],[14],[15]              
Cost 340 [3],[17],[18]     759 [7],[14],[15]              
Fair Value 341 [3],[17],[18]     761 [7],[14],[15]              
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien 6                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 272 [3],[9],[17],[18]     341 [7],[11],[14],[15]              
Cost 271 [3],[17],[18]     340 [7],[14],[15]              
Fair Value 272 [3],[17],[18]     341 [7],[14],[15]              
Investment, Identifier [Axis]: Bullhorn, Inc. | First lien 7                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       272              
Cost [7],[14],[15]       271              
Fair Value [7],[14],[15]       272              
Investment, Identifier [Axis]: CFS Management, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 12,518 [3],[4],[9],[20]     12,124 [7],[8],[11],[16]              
Cost 12,519 [3],[4],[20]     12,124 [7],[8],[16]              
Fair Value 10,327 [3],[4],[20]     10,608 [7],[8],[16]              
Investment, Identifier [Axis]: CFS Management, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,730 [3],[9],[17],[18]     3,612 [7],[11],[14],[15]              
Cost 3,739 [3],[17],[18]     3,621 [7],[14],[15]              
Fair Value 3,077 [3],[17],[18]     3,161 [7],[14],[15]              
Investment, Identifier [Axis]: CG Group Holdings, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       8,582              
Cost [7],[14],[15]       8,553              
Fair Value [7],[14],[15]       8,582              
Investment, Identifier [Axis]: CG Group Holdings, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12],[16]       1,089              
Cost [7],[8],[12],[16]       1,078              
Fair Value [7],[8],[12],[16]       1,089              
Investment, Identifier [Axis]: CG Group Holdings, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       113              
Cost [7],[8],[12]       (1)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       6,451              
Cost [7],[14],[15]       6,423              
Fair Value [7],[14],[15]       6,451              
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,629              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,086              
Cost [7],[8],[12]       (5)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Capstone Borrower, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [4],[9],[20] 3,763                    
Cost [4],[20] 3,286                    
Fair Value [4],[20] 3,621                    
Investment, Identifier [Axis]: Cardinal Parent, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,517 [9],[13]     11,609 [11],[19]              
Cost 11,500 [13]     11,581 [19]              
Fair Value 10,358 [13]     11,366 [19]              
Investment, Identifier [Axis]: Cardinal Parent, Inc. | Second lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,767 [3],[9],[13]     9,767 [7],[11],[19]              
Cost 9,732 [3],[13]     9,721 [7],[19]              
Fair Value 8,546 [3],[13]     9,653 [7],[19]              
Investment, Identifier [Axis]: Centegix Intermediate II, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 240                    
Cost [3],[17],[18] 239                    
Fair Value [3],[17],[18] 239                    
Investment, Identifier [Axis]: Centegix Intermediate II, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 1,177                    
Cost [3],[4],[10] 0                    
Fair Value [3],[4],[10] (6)                    
Investment, Identifier [Axis]: CentralSquare Technologies, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 36,234 [3],[9],[17],[18]     36,497 [7],[11],[14],[15]              
Cost 35,951 [3],[17],[18]     36,162 [7],[14],[15]              
Fair Value 36,234 [3],[17],[18]     36,497 [7],[14],[15]              
Investment, Identifier [Axis]: CentralSquare Technologies, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,980 [3],[4],[9],[10]     3,980 [7],[8],[11],[12]              
Cost (50) [3],[4],[10]     (50) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Ciklum Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[20] 448                    
Cost [3],[4],[10],[20] 443                    
Fair Value [3],[4],[10],[20] 448                    
Investment, Identifier [Axis]: Ciklum Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,540 [3],[4],[9],[10],[23]     2,989 [7],[8],[11],[12],[22]              
Cost (32) [3],[4],[10],[23]     (37) [7],[8],[12],[22]              
Fair Value 0 [3],[4],[10],[23]     0 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Ciklum Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,368 [3],[9],[17],[18]     9,440 [7],[11],[14],[15]              
Cost 9,294 [3],[17],[18]     9,351 [7],[14],[15]              
Fair Value 9,368 [3],[17],[18]     9,440 [7],[14],[15]              
Investment, Identifier [Axis]: Ciklum Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,701 [3],[4],[9],[20]     5,339 [7],[8],[11],[16]              
Cost 4,657 [3],[4],[20]     5,280 [7],[8],[16]              
Fair Value 4,701 [3],[4],[20]     5,339 [7],[8],[16]              
Investment, Identifier [Axis]: Community Management Holdings MidCo 2, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       1,291              
Cost [7],[8],[16]       1,279              
Fair Value [7],[8],[16]       1,291              
Investment, Identifier [Axis]: Community Management Holdings MidCo 2, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12],[16]       9              
Cost [7],[8],[12],[16]       9              
Fair Value [7],[8],[12],[16]       9              
Investment, Identifier [Axis]: Community Management Holdings MidCo 2, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       602              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Community Management Holdings MidCo 2, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 608                    
Cost [3],[4],[20] 603                    
Fair Value [3],[4],[20] 608                    
Investment, Identifier [Axis]: Community Management Holdings MidCo 2, LLC | First lien1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 1,282                    
Cost [3],[4],[20] 1,271                    
Fair Value [3],[4],[20] 1,282                    
Investment, Identifier [Axis]: Compsych Investments Corp | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       2,253              
Cost [7],[8],[12]       (14)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Compsych Investments Corp. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,731 [3],[9],[17],[18]     7,790 [7],[11],[14],[15]              
Cost 7,687 [3],[17],[18]     7,741 [7],[14],[15]              
Fair Value 7,731 [3],[17],[18]     7,790 [7],[14],[15]              
Investment, Identifier [Axis]: Compsych Investments Corp. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 2,253                    
Cost [3],[4],[10] (14)                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: Convey Health Solutions, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,373 [3],[9],[18]     13,518 [7],[11],[14],[15]              
Cost 12,971 [3],[18]     13,475 [7],[14],[15]              
Fair Value 1,444 [3],[18]     9,869 [7],[14],[15]              
Investment, Identifier [Axis]: Convey Health Solutions, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,233 [3],[9],[18]     2,257 [7],[11],[14],[15]              
Cost 2,160 [3],[18]     2,244 [7],[14],[15]              
Fair Value 241 [3],[18]     1,648 [7],[14],[15]              
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,459 [3],[4],[9],[20]     1,470 [7],[8],[11],[16]              
Cost 1,453 [3],[4],[20]     1,463 [7],[8],[16]              
Fair Value 1,459 [3],[4],[20]     1,470 [7],[8],[16]              
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       147              
Cost [7],[8],[12]       (1)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Coupa Holdings, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       14,243              
Cost [7],[14],[15]       14,123              
Fair Value [7],[14],[15]       14,243              
Investment, Identifier [Axis]: Coupa Holdings, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[20] 659                    
Cost [3],[4],[10],[20] 651                    
Fair Value [3],[4],[10],[20] 659                    
Investment, Identifier [Axis]: Coupa Holdings, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 330                    
Cost [3],[4],[10] (4)                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: Coupa Holdings, LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,291              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Coupa Holdings, LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       989              
Cost [7],[8],[12]       (12)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Coupa Holdings, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 14,135                    
Cost [3],[17],[18] 14,034                    
Fair Value [3],[17],[18] 14,135                    
Investment, Identifier [Axis]: Coupa Holdings, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 1,288                    
Cost [3],[4],[20] 1,289                    
Fair Value [3],[4],[20] 1,288                    
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. (f/k/a NMC Crimson Holdings, Inc.) | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 24,172 [3],[9],[17],[18]     24,172 [7],[11],[14],[15]              
Cost 24,079 [3],[17],[18]     24,034 [7],[14],[15]              
Fair Value 23,794 [3],[17],[18]     24,172 [7],[14],[15]              
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. (f/k/a NMC Crimson Holdings, Inc.) | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,012 [3],[4],[9],[20]     5,012 [7],[8],[11],[16]              
Cost 5,004 [3],[4],[20]     5,001 [7],[8],[16]              
Fair Value 4,934 [3],[4],[20]     5,012 [7],[8],[16]              
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. (f/k/a NMC Crimson Holdings, Inc.) | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,706 [3],[9],[17],[18]     4,706 [7],[11],[14],[15]              
Cost 4,693 [3],[17],[18]     4,687 [7],[14],[15]              
Fair Value 4,632 [3],[17],[18]     4,706 [7],[14],[15]              
Investment, Identifier [Axis]: DCA Buyer LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 962                    
Cost [3],[17],[18] 962                    
Fair Value [3],[17],[18] 962                    
Investment, Identifier [Axis]: DCA Buyer LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 539                    
Cost [3],[4],[20] 539                    
Fair Value [3],[4],[20] 539                    
Investment, Identifier [Axis]: DCA Investment Holding, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       1,786              
Cost [7],[14],[15]       1,781              
Fair Value [7],[14],[15]       1,574              
Investment, Identifier [Axis]: DCA Investment Holding, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       1,000              
Cost [7],[8],[16]       994              
Fair Value [7],[8],[16]       882              
Investment, Identifier [Axis]: DCA TopCo LP | Class A Common Units 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[18] 617                    
Fair Value [3],[18] 617                    
Investment, Identifier [Axis]: DCA TopCo LP | Class A Common Units 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4] 345                    
Fair Value [3],[4] 345                    
Investment, Identifier [Axis]: DG Investment Intermediate Holdings 2, Inc. | Second lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       9,512              
Cost [7],[8],[16]       9,466              
Fair Value [7],[8],[16]       9,464              
Investment, Identifier [Axis]: DOCS, MSO, LLC | First lien - Drawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[13] 3,215                    
Cost [3],[13] 3,215                    
Fair Value [3],[13] 3,215                    
Investment, Identifier [Axis]: DOCS, MSO, LLC | First lien - Drawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 1,587                    
Cost [3],[4],[20] 1,580                    
Fair Value [3],[4],[20] 1,587                    
Investment, Identifier [Axis]: DOCS, MSO, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,405 [3],[4],[9],[10]     2,405 [7],[8],[11],[12]              
Cost 0 [3],[4],[10]     0 [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: DOCS, MSO, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       18,149              
Cost [7],[8],[16]       18,149              
Fair Value [7],[8],[16]       18,149              
Investment, Identifier [Axis]: DOCS, MSO, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[19]       6,797              
Cost [7],[19]       6,797              
Fair Value [7],[19]       6,797              
Investment, Identifier [Axis]: DOCS, MSO, LLC | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       3,354              
Cost [7],[8],[16]       3,335              
Fair Value [7],[8],[16]       3,354              
Investment, Identifier [Axis]: DT1 Midco Corp | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       1,342              
Cost [7],[14],[15]       1,335              
Fair Value [7],[14],[15]       1,335              
Investment, Identifier [Axis]: DT1 Midco Corp | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       32              
Cost [7],[8],[12]       32              
Fair Value [7],[8],[12]       32              
Investment, Identifier [Axis]: DT1 Midco Corp | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       674              
Cost [7],[8],[12]       (3)              
Fair Value [7],[8],[12]       (3)              
Investment, Identifier [Axis]: DT1 Midco Corp | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       4,462              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       (22)              
Investment, Identifier [Axis]: DT1 Midco Corp. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 1,331                    
Cost [3],[17],[18] 1,326                    
Fair Value [3],[17],[18] 1,321                    
Investment, Identifier [Axis]: DT1 Midco Corp. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 2,625                    
Cost [3],[4],[10] 2,612                    
Fair Value [3],[4],[10] 2,605                    
Investment, Identifier [Axis]: DT1 Midco Corp. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 674                    
Cost [3],[4],[10] (3)                    
Fair Value [3],[4],[10] (5)                    
Investment, Identifier [Axis]: DT1 Midco Corp. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 1,869                    
Cost [3],[4],[10] 0                    
Fair Value [3],[4],[10] (14)                    
Investment, Identifier [Axis]: Daxko Acquisition Corporation | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 986 [3],[4],[9],[10]     986 [7],[8],[11],[12]              
Cost (10) [3],[4],[10]     (10) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Daxko Acquisition Corporation | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 12,646 [3],[4],[9],[20]     12,746 [7],[8],[11],[16]              
Cost 12,602 [3],[4],[20]     12,686 [7],[8],[16]              
Fair Value 12,646 [3],[4],[20]     12,746 [7],[8],[16]              
Investment, Identifier [Axis]: Daxko Acquisition Corporation | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,066 [3],[9],[17],[18]     1,074 [7],[11],[14],[15]              
Cost 1,062 [3],[17],[18]     1,069 [7],[14],[15]              
Fair Value 1,066 [3],[17],[18]     1,074 [7],[14],[15]              
Investment, Identifier [Axis]: Daxko Acquisition Corporation | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 64 [3],[4],[9]     64 [7],[8],[11]              
Cost 63 [3],[4]     64 [7],[8]              
Fair Value 64 [3],[4]     64 [7],[8]              
Investment, Identifier [Axis]: Dealer Tire Holdings, LLC | Preferred Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 27,116     90,671              
Cost [3],[4],[20],[26] 27,082                    
Fair Value [3],[4],[20],[26] 23,727                    
Investment, Identifier [Axis]: Dealer Tire Holdings, LLC | Preferred shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[16],[27]       81,859              
Fair Value [7],[8],[16],[27]       87,225              
Investment, Identifier [Axis]: Deca Dental Holdings LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 37,413 [3],[9],[17],[18]     36,710 [7],[11],[14],[15]              
Cost 37,289 [3],[17],[18]     36,543 [7],[14],[15]              
Fair Value 31,801 [3],[17],[18]     35,715 [7],[14],[15]              
Investment, Identifier [Axis]: Deca Dental Holdings LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,938 [3],[4],[9],[20]     3,864 [7],[8],[11],[16]              
Cost 3,925 [3],[4],[20]     3,846 [7],[8],[16]              
Fair Value 3,347 [3],[4],[20]     3,760 [7],[8],[16]              
Investment, Identifier [Axis]: Deca Dental Holdings LLC | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,101 [3],[4],[9],[20]     3,027 [7],[8],[11],[16]              
Cost 3,071 [3],[4],[20]     2,997 [7],[8],[16]              
Fair Value 2,636 [3],[4],[20]     2,945 [7],[8],[16]              
Investment, Identifier [Axis]: Deca Dental Holdings LLC | First lien 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 1,156                    
Cost [3],[4],[20] 1,156                    
Fair Value [3],[4],[20] 1,156                    
Investment, Identifier [Axis]: Denali Intermediate Holdings, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       9,091              
Cost [7],[14],[15]       9,047              
Fair Value [7],[14],[15]       9,045              
Investment, Identifier [Axis]: Denali Intermediate Holdings, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       909              
Cost [7],[8],[12]       (5)              
Fair Value [7],[8],[12]       (5)              
Investment, Identifier [Axis]: Digicert, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 15,345 [3],[9],[17],[18]     15,462 [7],[11],[14],[15]              
Cost 15,253 [3],[17],[18]     15,354 [7],[14],[15]              
Fair Value 15,345 [3],[17],[18]     15,346 [7],[14],[15]              
Investment, Identifier [Axis]: Digicert, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,119 [3],[4],[9],[10]     1,119 [7],[8],[11],[12]              
Cost (8) [3],[4],[10]     (8) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     (8) [7],[8],[12]              
Investment, Identifier [Axis]: Diligent Corporation | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 3,505                    
Cost [3],[4],[20] 3,496                    
Fair Value [3],[4],[20] 3,391                    
Investment, Identifier [Axis]: Diligent Corporation | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,178 [3],[4],[9],[10]     532 [7],[8],[11],[12]              
Cost 1,174 [3],[4],[10]     530 [7],[8],[12]              
Fair Value 1,140 [3],[4],[10]     532 [7],[8],[12]              
Investment, Identifier [Axis]: Diligent Corporation | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 1,087                    
Cost [3],[4],[10] (4)                    
Fair Value [3],[4],[10] (35)                    
Investment, Identifier [Axis]: Diligent Corporation | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,733              
Cost [7],[8],[12]       (6)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Diligent Corporation | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       3,398              
Cost [7],[8],[12]       (13)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Diligent Corporation | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       19,821              
Cost [7],[14],[15]       19,763              
Fair Value [7],[14],[15]       19,821              
Investment, Identifier [Axis]: Diligent Corporation | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       3,398              
Cost [7],[8],[16]       3,388              
Fair Value [7],[8],[16]       3,398              
Investment, Identifier [Axis]: Diligent Preferred Issuer, Inc. | Preferred shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       15,827              
Cost [7],[8],[28]       15,702              
Fair Value [7],[8],[28]       15,036              
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) / Eagle Infrastructure Super HoldCo, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 22,648     18,337     $ 19,156        
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 10,628 [3],[9],[17],[18],[29]     10,628 [7],[11],[14],[15],[30]              
Cost 10,628 [3],[17],[18],[29]     10,628 [7],[14],[15],[30]              
Fair Value 10,628 [3],[17],[18],[29]     10,628 [7],[14],[15],[30]              
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 340 [3],[4],[9],[29]     340 [7],[8],[11],[30]              
Cost 340 [3],[4],[29]     340 [7],[8],[30]              
Fair Value 340 [3],[4],[29]     340 [7],[8],[30]              
Investment, Identifier [Axis]: Eagle Infrastructure Super HoldCo, LLC | Ordinary Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[29] 4,103                    
Fair Value [3],[4],[29] 11,680                    
Investment, Identifier [Axis]: Eagle Infrastructure Super HoldCo, LLC | Ordinary shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[30]       4,104              
Fair Value [7],[8],[30]       7,369              
Investment, Identifier [Axis]: Eclipse Buyer Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,113 [3],[9],[13],[31]     7,113 [7],[11],[19],[32]              
Cost 7,086 [3],[13],[31]     7,082 [7],[19],[32]              
Fair Value 7,007 [3],[13],[31]     7,113 [7],[19],[32]              
Investment, Identifier [Axis]: Eclipse Buyer Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[31] 4,190                    
Cost [3],[4],[10],[31] (21)                    
Fair Value [3],[4],[10],[31] (62)                    
Investment, Identifier [Axis]: Eclipse Buyer Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[12],[19]       1,206              
Cost [7],[12],[19]       0              
Fair Value [7],[12],[19]       0              
Investment, Identifier [Axis]: Eclipse Buyer Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       4,190              
Cost [7],[8],[12]       (21)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.) | Ordinary Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4] 145                    
Fair Value [3],[4] 41                    
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.) | Ordinary shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8]       145              
Fair Value [7],[8]       0              
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.) | Series A Preferred Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4] 3,835                    
Fair Value [3],[4] 3,835                    
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.) | Series A preferred shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,835     3,335              
Cost [7],[8]       3,335              
Fair Value [7],[8]       3,335              
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.) | Series B Preferred Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4] 2,565                    
Fair Value [3],[4] 3,068                    
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.) | Series B preferred shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,691     4,116              
Cost [7],[8]       2,565              
Fair Value [7],[8]       3,009              
Investment, Identifier [Axis]: Eclipse Topco, Inc. | Preferred Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[13],[31] 1,620                    
Fair Value [3],[13],[31] 1,616                    
Investment, Identifier [Axis]: Eclipse Topco, Inc. | Preferred shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,632     2,226              
Cost [7],[19],[32]       2,207              
Fair Value [7],[19],[32]       2,228              
Investment, Identifier [Axis]: Edmentum Ultimate Holdings, LLC | Subordinated                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 30,418 [3],[4],[9],[29],[33]     26,646 [7],[8],[11],[30],[34]              
Cost 30,383 [3],[4],[29],[33]     26,596 [7],[8],[30],[34]              
Fair Value 30,418 [3],[4],[29],[33]     26,646 [7],[8],[30],[34]              
Investment, Identifier [Axis]: Einstein Parent, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,750 [3],[4],[9],[10]     5,750 [7],[8],[11],[12]              
Cost (57) [3],[4],[10]     (57) [7],[8],[12]              
Fair Value (129) [3],[4],[10]     (57) [7],[8],[12]              
Investment, Identifier [Axis]: Einstein Parent, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 35,582 [3],[4],[9],[20]     35,582 [7],[8],[11],[16]              
Cost 35,308 [3],[4],[20]     35,292 [7],[8],[16]              
Fair Value 34,782 [3],[4],[20]     35,226 [7],[8],[16]              
Investment, Identifier [Axis]: Einstein Parent, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 20,000 [3],[9],[17],[18]     20,000 [7],[11],[14],[15]              
Cost 19,845 [3],[17],[18]     19,800 [7],[14],[15]              
Fair Value 19,550 [3],[17],[18]     19,800 [7],[14],[15]              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[20] 158                    
Cost [3],[4],[10],[20] 156                    
Fair Value [3],[4],[10],[20] 158                    
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien - Drawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[12],[25]       2,533              
Cost [7],[12],[25]       2,508              
Fair Value [7],[12],[25]       2,533              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 1,243                    
Cost [3],[4],[10] (12)                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       64              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[12],[25]       191              
Cost [7],[12],[25]       0              
Fair Value [7],[12],[25]       0              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien - Undrawn 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,400              
Cost [7],[8],[12]       (14)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 8,370 [3],[9],[24]     8,449 [7],[11],[25]              
Cost 8,338 [3],[24]     8,410 [7],[25]              
Fair Value 8,370 [3],[24]     8,449 [7],[25]              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,667 [3],[4],[9],[20]     4,710 [7],[8],[11],[16]              
Cost 4,644 [3],[4],[20]     4,682 [7],[8],[16]              
Fair Value 4,667 [3],[4],[20]     4,710 [7],[8],[16]              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,810 [3],[9],[24]     2,836 [7],[11],[25]              
Cost 2,798 [3],[24]     2,822 [7],[25]              
Fair Value 2,810 [3],[24]     2,836 [7],[25]              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,792 [3],[9],[24]     2,818 [7],[11],[25]              
Cost 2,781 [3],[24]     2,805 [7],[25]              
Fair Value 2,792 [3],[24]     2,818 [7],[25]              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien 5                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[24] 2,704                    
Cost [3],[24] 2,682                    
Fair Value [3],[24] 2,704                    
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien 6                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 903                    
Cost [3],[4],[20] 895                    
Fair Value [3],[4],[20] 903                    
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC | First lien- Drawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12],[16]       846              
Cost [7],[8],[12],[16]       837              
Fair Value [7],[8],[12],[16]       846              
Investment, Identifier [Axis]: FS WhiteWater Holdings, LLC | Ordinary Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[24],[35] 5,000                    
Fair Value [3],[24],[35] 6,117                    
Investment, Identifier [Axis]: FS WhiteWater Holdings, LLC | Ordinary shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[25],[36]       5,000              
Fair Value [7],[25],[36]       5,357              
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 8,299 [3],[4],[9],[20]     8,187 [7],[8],[11],[16]              
Cost 8,282 [3],[4],[20]     8,169 [7],[8],[16]              
Fair Value 8,299 [3],[4],[20]     8,167 [7],[8],[16]              
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,208 [3],[4],[9],[10]     1,919 [7],[8],[11],[12]              
Cost 3,201 [3],[4],[10]     1,914 [7],[8],[12]              
Fair Value 3,208 [3],[4],[10]     1,914 [7],[8],[12]              
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,422              
Cost [7],[8],[12]       (4)              
Fair Value [7],[8],[12]       (4)              
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,422 [3],[4],[9],[10]     2,814 [7],[8],[11],[12]              
Cost (4) [3],[4],[10]     0 [7],[8],[12]              
Fair Value 0 [3],[4],[10]     (7) [7],[8],[12]              
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc. | First lien - Undrawn1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 1,504                    
Cost [3],[4],[10] 0                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: Firebird Co-Invest L.P. | LP Interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost 3,358 [3],[4],[37]     3,358 [7],[8],[38]              
Fair Value 4,350 [3],[4],[37]     3,358 [7],[8],[38]              
Investment, Identifier [Axis]: Flash Charm Inc. (fka Idera, Inc.) | Second lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [11],[19]       6,474              
Cost [19]       6,463              
Fair Value [19]       5,697              
Investment, Identifier [Axis]: Flash Charm Inc. (fka Idera, Inc.) | Second lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [8],[11],[16]       863              
Cost [8],[16]       862              
Fair Value [8],[16]       760              
Investment, Identifier [Axis]: Foreside Financial Group, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       460              
Cost [7],[8],[12]       457              
Fair Value [7],[8],[12]       460              
Investment, Identifier [Axis]: Foreside Financial Group, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 2,311                    
Cost [3],[4],[10] (23)                    
Fair Value [3],[4],[10] (12)                    
Investment, Identifier [Axis]: Foreside Financial Group, LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       2,849              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Foreside Financial Group, LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       2,311              
Cost [7],[8],[12]       (21)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Foreside Financial Group, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,726 [3],[9],[17],[18]     36,810 [7],[11],[14],[15]              
Cost 7,716 [3],[17],[18]     36,683 [7],[14],[15]              
Fair Value 7,688 [3],[17],[18]     36,810 [7],[14],[15]              
Investment, Identifier [Axis]: Foreside Financial Group, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 272 [3],[4],[9],[20]     4,033 [7],[8],[11],[16]              
Cost 271 [3],[4],[20]     4,012 [7],[8],[16]              
Fair Value 271 [3],[4],[20]     4,033 [7],[8],[16]              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,014 [3],[4],[9],[10],[20]     834 [7],[8],[11],[12],[16]              
Cost 1,994 [3],[4],[10],[20]     826 [7],[8],[12],[16]              
Fair Value 2,014 [3],[4],[10],[20]     834 [7],[8],[12],[16]              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 846 [3],[4],[9],[10]     2,026 [7],[8],[11],[12]              
Cost (8) [3],[4],[10]     (20) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 29,006 [3],[9],[17],[18]     29,234 [7],[11],[14],[15]              
Cost 28,900 [3],[17],[18]     29,095 [7],[14],[15]              
Fair Value 29,006 [3],[17],[18]     29,234 [7],[14],[15]              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 965 [3],[4],[9],[20]     972 [7],[8],[11],[16]              
Cost 968 [3],[4],[20]     974 [7],[8],[16]              
Fair Value 965 [3],[4],[20]     972 [7],[8],[16]              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 78 [3],[4],[9]     79 [7],[8],[11]              
Cost 78 [3],[4]     78 [7],[8]              
Fair Value 78 [3],[4]     79 [7],[8]              
Investment, Identifier [Axis]: Foundational Education Group, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,301 [9],[17],[18]     6,350 [11],[14],[15]              
Cost 5,947 [17],[18]     5,871 [14],[15]              
Fair Value 5,885 [17],[18]     5,871 [14],[15]              
Investment, Identifier [Axis]: Foundational Education Group, Inc. | Second lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 22,500 [3],[9],[24]     22,500 [7],[11],[25]              
Cost 22,447 [3],[24]     22,436 [7],[25]              
Fair Value 22,500 [3],[24]     22,500 [7],[25]              
Investment, Identifier [Axis]: Foundational Education Group, Inc. | Second lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 10,965 [3],[4],[9],[20]     10,965 [7],[8],[11],[16]              
Cost 10,791 [3],[4],[20]     10,754 [7],[8],[16]              
Fair Value 10,965 [3],[4],[20]     10,965 [7],[8],[16]              
Investment, Identifier [Axis]: Fullsteam Operations LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,223 [3],[9],[17],[18]     6,223 [7],[11],[14],[15]              
Cost 6,197 [3],[17],[18]     6,193 [7],[14],[15]              
Fair Value 6,192 [3],[17],[18]     6,192 [7],[14],[15]              
Investment, Identifier [Axis]: Fullsteam Operations LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[20] 377                    
Cost [3],[4],[10],[20] 375                    
Fair Value [3],[4],[10],[20] 375                    
Investment, Identifier [Axis]: Fullsteam Operations LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 691 [3],[4],[9],[10]     691 [7],[8],[11],[12]              
Cost (3) [3],[4],[10]     (3) [7],[8],[12]              
Fair Value (3) [3],[4],[10]     (3) [7],[8],[12]              
Investment, Identifier [Axis]: Fullsteam Operations LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,698 [3],[4],[9],[10]     2,074 [7],[8],[11],[12]              
Cost 0 [3],[4],[10]     0 [7],[8],[12]              
Fair Value (8) [3],[4],[10]     (10) [7],[8],[12]              
Investment, Identifier [Axis]: GC Waves Holdings, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [9],[24] 21,072                    
Cost [24] 21,027                    
Fair Value [24] 21,072                    
Investment, Identifier [Axis]: GC Waves Holdings, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,951 [4],[9],[10]     3,951 [7],[8],[11],[12]              
Cost (30) [4],[10]     (30) [7],[8],[12]              
Fair Value 0 [4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: GC Waves Holdings, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       35,918              
Cost [7],[14],[15]       35,742              
Fair Value [7],[14],[15]       35,918              
Investment, Identifier [Axis]: GC Waves Holdings, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[25]       21,233              
Cost [7],[25]       21,180              
Fair Value [7],[25]       21,233              
Investment, Identifier [Axis]: GEDC Equity, LLC | Participation Interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost 190 [3],[4]     190 [7],[8]              
Fair Value 0 [3],[4]     50 [7],[8]              
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 4,818                    
Cost [3],[4],[10] 4,793                    
Fair Value [3],[4],[10] 4,213                    
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | First lien - Drawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,786              
Cost [7],[8],[12]       1,779              
Fair Value [7],[8],[12]       1,786              
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | First lien - Drawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       448              
Cost [7],[8],[12]       446              
Fair Value [7],[8],[12]       448              
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 3                    
Cost [3],[4],[10] 0                    
Fair Value [3],[4],[10] (1)                    
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       759              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       3,036              
Cost [7],[8],[12]       (19)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 20,906 [3],[9],[24]     25,079 [7],[11],[14],[15]              
Cost 20,888 [3],[24]     25,049 [7],[14],[15]              
Fair Value 18,280 [3],[24]     25,079 [7],[14],[15]              
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 445 [3],[4],[9]     21,074 [7],[11],[25]              
Cost 442 [3],[4]     21,048 [7],[25]              
Fair Value 389 [3],[4]     21,074 [7],[25]              
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       2,878              
Cost [7],[8],[16]       2,874              
Fair Value [7],[8],[16]       2,878              
Investment, Identifier [Axis]: Greenway Health, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,190 [3],[4],[9],[20]     6,238 [7],[8],[11],[16]              
Cost 6,140 [3],[4],[20]     6,175 [7],[8],[16]              
Fair Value 6,033 [3],[4],[20]     6,238 [7],[8],[16]              
Investment, Identifier [Axis]: HBWM Holdings, LLC | Common Units                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[39],[40] 4,827                    
Fair Value [3],[39],[40] 11,659                    
Investment, Identifier [Axis]: HBWM Holdings, LLC | Common units                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,827     4,776              
Cost [7],[41],[42]       4,776              
Fair Value [7],[41],[42]       10,854              
Investment, Identifier [Axis]: HP TLE Buyer, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 8,168 [3],[9],[17],[18]     8,168 [7],[11],[14],[15]              
Cost 8,132 [3],[17],[18]     8,129 [7],[14],[15]              
Fair Value 8,168 [3],[17],[18]     8,127 [7],[14],[15]              
Investment, Identifier [Axis]: HP TLE Buyer, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,797 [3],[4],[9],[10]     1,797 [7],[8],[11],[12]              
Cost (9) [3],[4],[10]     (9) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     (9) [7],[8],[12]              
Investment, Identifier [Axis]: HS Purchaser, LLC / Help/Systems Holdings, Inc. | Second lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 25,426 [3],[9],[24]     23,738 [7],[11],[25]              
Cost 25,381 [3],[24]     23,683 [7],[25]              
Fair Value 15,637 [3],[24]     19,640 [7],[25]              
Investment, Identifier [Axis]: HS Purchaser, LLC / Help/Systems Holdings, Inc. | Second lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,755 [3],[9],[18]     4,440 [7],[11],[14],[15]              
Cost 4,740 [3],[18]     4,421 [7],[14],[15]              
Fair Value 2,924 [3],[18]     3,673 [7],[14],[15]              
Investment, Identifier [Axis]: Healthspan Buyer, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       5,018              
Cost [7],[8],[16]       4,980              
Fair Value [7],[8],[16]       5,018              
Investment, Identifier [Axis]: Healthspan Buyer, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,229 [4],[9],[10]     1,229 [7],[8],[11],[12]              
Cost (12) [4],[10]     (12) [7],[8],[12]              
Fair Value 0 [4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Healthspan Buyer, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [9],[17],[18] 32,239                    
Cost [17],[18] 31,936                    
Fair Value [17],[18] 32,239                    
Investment, Identifier [Axis]: Healthspan Buyer, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [4],[9],[20] 4,980                    
Cost [4],[20] 4,947                    
Fair Value [4],[20] 4,980                    
Investment, Identifier [Axis]: Houghton Mifflin Harcourt Company | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 14,225 [9],[17],[18]     14,336 [11],[14],[15]              
Cost 13,988 [17],[18]     14,044 [14],[15]              
Fair Value 9,691 [17],[18]     12,689 [14],[15]              
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 220                    
Cost [3],[4],[10] (2)                    
Fair Value [3],[4],[10] (2)                    
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 3,587                    
Cost [3],[17],[18] 3,554                    
Fair Value [3],[17],[18] 3,552                    
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 958                    
Cost [3],[4],[20] 948                    
Fair Value [3],[4],[20] 948                    
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 516                    
Cost [3],[4],[20] 511                    
Fair Value [3],[4],[20] 511                    
Investment, Identifier [Axis]: IG Investments Holdings, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,780 [3],[4],[9],[10]     3,780 [7],[8],[11],[12]              
Cost (38) [3],[4],[10]     (38) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: IG Investments Holdings, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 32,225 [3],[9],[17],[18]     32,471 [7],[11],[14],[15]              
Cost 32,121 [3],[17],[18]     32,329 [7],[14],[15]              
Fair Value 32,225 [3],[17],[18]     32,471 [7],[14],[15]              
Investment, Identifier [Axis]: IG Investments Holdings, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,498 [3],[4],[9],[20]     2,517 [7],[8],[11],[16]              
Cost 2,500 [3],[4],[20]     2,517 [7],[8],[16]              
Fair Value 2,498 [3],[4],[20]     2,517 [7],[8],[16]              
Investment, Identifier [Axis]: IMA Financial Group, Inc. | Class C Common Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4] 4,411                    
Fair Value [3],[4] 4,411                    
Investment, Identifier [Axis]: Icefall Parent, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 4,828                    
Cost [3],[4],[20] 4,672                    
Fair Value [3],[4],[20] 4,828                    
Investment, Identifier [Axis]: Icefall Parent, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 475                    
Cost [3],[4],[10] (17)                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: Infogain Corporation | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,757 [3],[4],[9],[10]     3,827 [7],[8],[11],[12]              
Cost (28) [3],[4],[10]     (29) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Infogain Corporation | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,625 [3],[9],[17],[18]     18,324 [7],[11],[14],[15]              
Cost 7,598 [3],[17],[18]     18,263 [7],[14],[15]              
Fair Value 7,625 [3],[17],[18]     18,324 [7],[14],[15]              
Investment, Identifier [Axis]: Infogain Corporation | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 70 [3],[4],[9],[10]     7,685 [7],[11],[14],[15]              
Cost 70 [3],[4],[10]     7,647 [7],[14],[15]              
Fair Value 70 [3],[4],[10]     7,685 [7],[14],[15]              
Investment, Identifier [Axis]: Infogain Corporation | Subordinated                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,265 [3],[4],[9]     16,661 [7],[8],[11]              
Cost 6,226 [3],[4]     16,534 [7],[8]              
Fair Value 6,265 [3],[4]     16,661 [7],[8]              
Investment, Identifier [Axis]: Ivy Hill Middle Market Credit Fund, Ltd | Structured Finance Obligation                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,232 [3],[4],[9],[23]     3,232 [7],[8],[11],[22]              
Cost 3,232 [3],[4],[23]     3,232 [7],[8],[22]              
Fair Value 3,217 [3],[4],[23]     3,277 [7],[8],[22]              
Investment, Identifier [Axis]: Jawbreaker Parent, Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 1,503                    
Cost [3],[4],[10] 0                    
Fair Value [3],[4],[10] (8)                    
Investment, Identifier [Axis]: Jawbreaker Parent, Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 1,503                    
Cost [3],[4],[10] (8)                    
Fair Value [3],[4],[10] (8)                    
Investment, Identifier [Axis]: Jawbreaker Parent, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 7,777                    
Cost [3],[17],[18] 7,740                    
Fair Value [3],[17],[18] 7,738                    
Investment, Identifier [Axis]: Jawbreaker Parent, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 3,718                    
Cost [3],[4],[20] 3,718                    
Fair Value [3],[4],[20] 3,700                    
Investment, Identifier [Axis]: Jawbreaker Topco, L.P. | Class A-1 Common Units                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[43] 2,476                    
Fair Value [3],[4],[43] 2,476                    
Investment, Identifier [Axis]: KPSKY Acquisition Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,703 [3],[4],[9],[20]     6,756 [7],[8],[11],[16]              
Cost 6,680 [3],[4],[20]     6,724 [7],[8],[16]              
Fair Value 6,140 [3],[4],[20]     6,331 [7],[8],[16]              
Investment, Identifier [Axis]: KPSKY Acquisition Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,128 [3],[4],[9],[20]     1,137 [7],[8],[11],[16]              
Cost 1,123 [3],[4],[20]     1,130 [7],[8],[16]              
Fair Value 1,033 [3],[4],[20]     1,066 [7],[8],[16]              
Investment, Identifier [Axis]: KPSKY Acquisition Inc. | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 768 [3],[4],[9],[20]     774 [7],[8],[11],[16]              
Cost 765 [3],[4],[20]     770 [7],[8],[16]              
Fair Value 703 [3],[4],[20]     726 [7],[8],[16]              
Investment, Identifier [Axis]: KPSKY Acquisition Inc. | First lien 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 18 [3],[4],[9]     19 [7],[8],[11]              
Cost 18 [3],[4]     18 [7],[8]              
Fair Value 17 [3],[4]     18 [7],[8]              
Investment, Identifier [Axis]: Kele Holdco, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 540 [3],[4],[9],[10],[20]     270 [7],[8],[11],[12],[16]              
Cost 537 [3],[4],[10],[20]     269 [7],[8],[12],[16]              
Fair Value 540 [3],[4],[10],[20]     270 [7],[8],[12],[16]              
Investment, Identifier [Axis]: Kele Holdco, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,259 [3],[4],[9],[10]     1,529 [7],[8],[11],[12]              
Cost (6) [3],[4],[10]     (8) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Kele Holdco, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 14,352 [3],[9],[24]     14,473 [7],[11],[25]              
Cost 14,343 [3],[24]     14,461 [7],[25]              
Fair Value 14,352 [3],[24]     14,473 [7],[25]              
Investment, Identifier [Axis]: Kele Holdco, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,109 [3],[9],[24]     1,241 [7],[11],[25]              
Cost 1,106 [3],[24]     1,236 [7],[25]              
Fair Value 1,109 [3],[24]     1,241 [7],[25]              
Investment, Identifier [Axis]: Knockout Intermediate Holdings I Inc. | Preferred Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[44] 14,203                    
Fair Value [3],[4],[44] 9,674                    
Investment, Identifier [Axis]: Knockout Intermediate Holdings I Inc. | Preferred shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 14,279     13,323              
Cost [7],[8],[45]       13,248              
Fair Value [7],[8],[45]       13,324              
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[25]       6,250              
Cost [7],[25]       6,198              
Fair Value [7],[25]       6,250              
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 179                    
Cost [3],[4],[10] 177                    
Fair Value [3],[4],[10] 174                    
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC | First lien - Drawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[12],[25]       296              
Cost [7],[12],[25]       293              
Fair Value [7],[12],[25]       296              
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC | First lien - Drawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       233              
Cost [7],[8],[12]       230              
Fair Value [7],[8],[12]       233              
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 537                    
Cost [3],[4],[10] (5)                    
Fair Value [3],[4],[10] (13)                    
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[12],[25]       61              
Cost [7],[12],[25]       0              
Fair Value [7],[12],[25]       0              
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       483              
Cost [7],[8],[12]       (5)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[24] 6,310                    
Cost [3],[24] 6,264                    
Fair Value [3],[24] 6,215                    
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[24] 354                    
Cost [3],[24] 351                    
Fair Value [3],[24] 345                    
Investment, Identifier [Axis]: LogRhythm, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9] 4,231                    
Cost [3],[4] 4,189                    
Fair Value [3],[4] 3,454                    
Investment, Identifier [Axis]: LogRhythm, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[20] 73                    
Cost [3],[4],[10],[20] 72                    
Fair Value [3],[4],[10],[20] 73                    
Investment, Identifier [Axis]: LogRhythm, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 346                    
Cost [3],[4],[10] (5)                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: Logrhythm, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11]       4,196              
Cost [7],[8]       4,148              
Fair Value [7],[8]       3,994              
Investment, Identifier [Axis]: Logrhythm, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       420              
Cost [7],[8],[12]       (6)              
Fair Value [7],[8],[12]       (20)              
Investment, Identifier [Axis]: Low Voltage Holdings Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 898                    
Cost [3],[4],[10] 895                    
Fair Value [3],[4],[10] 898                    
Investment, Identifier [Axis]: Low Voltage Holdings Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,738 [3],[4],[9],[10]     819 [7],[8],[11],[12]              
Cost 0 [3],[4],[10]     (3) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     (3) [7],[8],[12]              
Investment, Identifier [Axis]: Low Voltage Holdings Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 819 [3],[4],[9],[10]     2,317 [7],[8],[11],[12]              
Cost (3) [3],[4],[10]     (9) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     (9) [7],[8],[12]              
Investment, Identifier [Axis]: Low Voltage Holdings Inc. | First lien - Undrawn 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,419 [3],[4],[9],[10]     3,698 [7],[8],[11],[12]              
Cost (5) [3],[4],[10]     0 [7],[8],[12]              
Fair Value 0 [3],[4],[10]     (14) [7],[8],[12]              
Investment, Identifier [Axis]: Low Voltage Holdings Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 18,368 [3],[9],[17],[18]     17,038 [7],[11],[14],[15]              
Cost 18,311 [3],[17],[18]     16,979 [7],[14],[15]              
Fair Value 18,368 [3],[17],[18]     16,975 [7],[14],[15]              
Investment, Identifier [Axis]: Low Voltage Holdings Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 955 [3],[4],[9],[20]     1,422 [7],[8],[11],[16]              
Cost 953 [3],[4],[20]     1,417 [7],[8],[16]              
Fair Value 955 [3],[4],[20]     1,417 [7],[8],[16]              
Investment, Identifier [Axis]: MRI Software LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 501 [3],[4],[9],[10]     400 [7],[8],[11],[12]              
Cost 498 [3],[4],[10]     398 [7],[8],[12]              
Fair Value 493 [3],[4],[10]     400 [7],[8],[12]              
Investment, Identifier [Axis]: MRI Software LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,502 [3],[4],[9],[10]     1,602 [7],[8],[11],[12]              
Cost (8) [3],[4],[10]     (8) [7],[8],[12]              
Fair Value (23) [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: MRI Software LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 21,036 [3],[9],[24]     21,205 [7],[11],[25]              
Cost 21,021 [3],[24]     21,183 [7],[25]              
Fair Value 20,721 [3],[24]     21,205 [7],[25]              
Investment, Identifier [Axis]: MRI Software LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,453 [3],[4],[9],[20]     7,512 [7],[8],[11],[16]              
Cost 7,451 [3],[4],[20]     7,506 [7],[8],[16]              
Fair Value 7,341 [3],[4],[20]     7,512 [7],[8],[16]              
Investment, Identifier [Axis]: MRI Software LLC | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,439 [3],[9],[17],[18]     4,474 [7],[11],[14],[15]              
Cost 4,438 [3],[17],[18]     4,471 [7],[14],[15]              
Fair Value 4,372 [3],[17],[18]     4,474 [7],[14],[15]              
Investment, Identifier [Axis]: MRI Software LLC | First lien 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,050 [3],[9],[17],[18]     3,075 [7],[11],[14],[15]              
Cost 3,049 [3],[17],[18]     3,072 [7],[14],[15]              
Fair Value 3,005 [3],[17],[18]     3,075 [7],[14],[15]              
Investment, Identifier [Axis]: MRI Software LLC | First lien 5                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 779 [3],[4],[9],[20]     785 [7],[8],[11],[16]              
Cost 778 [3],[4],[20]     784 [7],[8],[16]              
Fair Value 767 [3],[4],[20]     785 [7],[8],[16]              
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[20] 1,878                    
Cost [3],[4],[10],[20] 1,861                    
Fair Value [3],[4],[10],[20] 1,878                    
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC | First lien - Drawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12],[16]       1,979              
Cost [7],[8],[12],[16]       1,959              
Fair Value [7],[8],[12],[16]       1,979              
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC | First lien - Drawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       57              
Cost [7],[8],[12]       57              
Fair Value [7],[8],[12]       57              
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,099 [3],[4],[9],[10]     1,709 [7],[8],[11],[12]              
Cost 0 [3],[4],[10]     0 [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 308 [3],[4],[9],[10]     251 [7],[8],[11],[12]              
Cost (2) [3],[4],[10]     (1) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Matterhorn Finco, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[23] 1,985                    
Cost [3],[4],[10],[23] (10)                    
Fair Value [3],[4],[10],[23] (10)                    
Investment, Identifier [Axis]: Matterhorn Finco, Inc., | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18],[23] 7,963                    
Cost [3],[17],[18],[23] 7,925                    
Fair Value [3],[17],[18],[23] 7,923                    
Investment, Identifier [Axis]: Meta Buyer LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [11],[14],[15]       2,987              
Cost [14],[15]       2,972              
Fair Value [14],[15]       2,972              
Investment, Identifier [Axis]: Meta Buyer LLC | First lien - Drawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 176                    
Cost [3],[4],[10] 175                    
Fair Value [3],[4],[10] 175                    
Investment, Identifier [Axis]: Meta Buyer LLC | First lien - Drawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 160                    
Cost [3],[4],[10] 159                    
Fair Value [3],[4],[10] 159                    
Investment, Identifier [Axis]: Meta Buyer LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 376 [3],[4],[9],[10]     819 [8],[11],[12]              
Cost (1) [3],[4],[10]     0 [8],[12]              
Fair Value (2) [3],[4],[10]     0 [8],[12]              
Investment, Identifier [Axis]: Meta Buyer LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 642 [3],[4],[9],[10]     409 [8],[11],[12]              
Cost 0 [3],[4],[10]     0 [8],[12]              
Fair Value (3) [3],[4],[10]     0 [8],[12]              
Investment, Identifier [Axis]: Meta Buyer LLC | First lien - Undrawn 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [8],[11],[12]       536              
Cost [8],[12]       (2)              
Fair Value [8],[12]       (2)              
Investment, Identifier [Axis]: Meta Buyer LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 2,972                    
Cost [3],[17],[18] 2,958                    
Fair Value [3],[17],[18] 2,957                    
Investment, Identifier [Axis]: Meta Buyer LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9] 408                    
Cost [3],[4] 405                    
Fair Value [3],[4] 406                    
Investment, Identifier [Axis]: Model N, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       43,774              
Cost [7],[14],[15]       43,592              
Fair Value [7],[14],[15]       43,774              
Investment, Identifier [Axis]: Model N, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 4,825                    
Cost [3],[4],[10] (24)                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: Model N, Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       9,047              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Model N, Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       4,825              
Cost [7],[8],[12]       (24)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Model N, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 43,442                    
Cost [3],[17],[18] 43,281                    
Fair Value [3],[17],[18] 43,442                    
Investment, Identifier [Axis]: Model N, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 4,501                    
Cost [3],[4],[20] 4,479                    
Fair Value [3],[4],[20] 4,501                    
Investment, Identifier [Axis]: NC Topco, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       5,862              
Cost [7],[14],[15]       5,838              
Fair Value [7],[14],[15]       5,862              
Investment, Identifier [Axis]: NC Topco, LLC | First lien - Drawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 5,819                    
Cost [3],[17],[18] 5,797                    
Fair Value [3],[17],[18] 5,819                    
Investment, Identifier [Axis]: NC Topco, LLC | First lien - Drawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 1,660                    
Cost [3],[4],[20] 1,652                    
Fair Value [3],[4],[20] 1,660                    
Investment, Identifier [Axis]: NC Topco, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 669                    
Cost [3],[4],[10] (3)                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: NC Topco, LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,672              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: NC Topco, LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       669              
Cost [7],[8],[12]       (3)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: NHME Holdings Corp. | Ordinary shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[46],[47]       4,000              
Fair Value [7],[8],[46],[47]       0              
Investment, Identifier [Axis]: NHME Holdings Corp. | Warrants                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[46],[47]       1,000              
Fair Value [7],[8],[46],[47]       0              
Investment, Identifier [Axis]: NM GP Holdco, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 406     390     322        
Investment, Identifier [Axis]: NM GP Holdco, LLC | Membership Interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[23],[48],[49] 862                    
Fair Value [3],[23],[48],[49] 406                    
Investment, Identifier [Axis]: NM GP Holdco, LLC | Membership interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[22],[47],[50]       850              
Fair Value [7],[22],[47],[50]       390              
Investment, Identifier [Axis]: NM NL Holdings, L.P.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 111,959     106,096     104,512        
Investment, Identifier [Axis]: NM NL Holdings, L.P. | Membership Interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[23],[48],[49] 73,202                    
Fair Value [3],[23],[48],[49] 111,959                    
Investment, Identifier [Axis]: NM NL Holdings, L.P. | Membership interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[22],[47],[50]       74,248              
Fair Value [7],[22],[47],[50]       106,096              
Investment, Identifier [Axis]: NM YI LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value       8,641     9,960        
Investment, Identifier [Axis]: NM YI, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 8,784     8,641              
Investment, Identifier [Axis]: NM YI, LLC | Membership Interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[48],[49] 6,272                    
Fair Value [3],[48],[49] 8,784                    
Investment, Identifier [Axis]: NM YI, LLC | Membership interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[47],[50]       6,272              
Fair Value [7],[47],[50]       8,641              
Investment, Identifier [Axis]: NMFC Senior Loan Program III LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 155,200     160,000     160,000        
Investment, Identifier [Axis]: NMFC Senior Loan Program III LLC | Membership Interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[23],[49] 160,000                    
Fair Value [3],[4],[23],[49] 155,200                    
Investment, Identifier [Axis]: NMFC Senior Loan Program III LLC | Membership interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[22],[47]       160,000              
Fair Value [7],[8],[22],[47]       160,000              
Investment, Identifier [Axis]: NMFC Senior Loan Program IV LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 102,284     112,400     112,400        
Investment, Identifier [Axis]: NMFC Senior Loan Program IV LLC | Membership Interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[23],[49] 112,400                    
Fair Value [3],[4],[23],[49] 102,284                    
Investment, Identifier [Axis]: NMFC Senior Loan Program IV LLC | Membership interest                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[22],[47]       112,400              
Fair Value [7],[8],[22],[47]       112,400              
Investment, Identifier [Axis]: National HME, Inc. | Second lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[46],[47]       8,281              
Cost [7],[8],[46],[47]       7,872              
Fair Value [7],[8],[46],[47]       0              
Investment, Identifier [Axis]: National HME, Inc./NHME Holdings Corp.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 0     0     3,000        
Investment, Identifier [Axis]: Nelipak Holding Company | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10],[20] 428                    
Cost [3],[4],[10],[20] 425                    
Fair Value [3],[4],[10],[20] 428                    
Investment, Identifier [Axis]: Nelipak Holding Company | First lien - Drawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12],[16]       2,168              
Cost [7],[8],[12],[16]       2,152              
Fair Value [7],[8],[12],[16]       2,168              
Investment, Identifier [Axis]: Nelipak Holding Company | First lien - Drawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12],[16],[51]       392              
Cost [7],[8],[12],[16],[51]       389              
Fair Value [7],[8],[12],[16],[51]       392              
Investment, Identifier [Axis]: Nelipak Holding Company | First lien - Drawn 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       123 € 105 [12]            
Cost [7],[8],[12]       121              
Fair Value [7],[8],[12]       123              
Investment, Identifier [Axis]: Nelipak Holding Company | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,332 [3],[4],[9],[10]     1,332 [7],[8],[11],[12]              
Cost 0 [3],[4],[10]     0 [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Nelipak Holding Company | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,264 € 6,411 [10]   7,529 6,411 [12],[16],[51]            
Cost 0 [3],[4],[10],[20],[52]     0 [7],[8],[12],[16],[51]              
Fair Value 0 [3],[4],[10],[20],[52]     0 [7],[8],[12],[16],[51]              
Investment, Identifier [Axis]: Nelipak Holding Company | First lien - Undrawn 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,355 1,196 [10]   1,282 1,092 [12],[16],[51]            
Cost (10) [3],[4],[10],[20],[52]     (8) [7],[8],[12],[16],[51]              
Fair Value 0 [3],[4],[10],[20],[52]     0 [7],[8],[12],[16],[51]              
Investment, Identifier [Axis]: Nelipak Holding Company | First lien - Undrawn 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,185 [3],[4],[9],[10]     2,221 [7],[8],[11],[12]              
Cost (16) [3],[4],[10]     (17) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Nelipak Holding Company | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 18,398 € 16,234   19,212 € 16,357 [16],[51]            
Cost 17,495 [3],[4],[20],[52]     17,614 [7],[8],[16],[51]              
Fair Value 18,398 [3],[4],[20],[52]     19,214 [7],[8],[16],[51]              
Investment, Identifier [Axis]: Nelipak Holding Company | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 8,865 [3],[9],[17],[18]     8,932 [7],[11],[14],[15]              
Cost 8,818 [3],[17],[18]     8,878 [7],[14],[15]              
Fair Value 8,865 [3],[17],[18]     8,932 [7],[14],[15]              
Investment, Identifier [Axis]: Nelipak Holding Company | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 2,152                    
Cost [3],[4],[20] 2,138                    
Fair Value [3],[4],[20] 2,152                    
Investment, Identifier [Axis]: New ACI Buyer LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 3,563                    
Cost [3],[17],[18] 3,563                    
Fair Value [3],[17],[18] 3,563                    
Investment, Identifier [Axis]: New ACI Buyer LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[18] 1,836                    
Cost [3],[18] 1,836                    
Fair Value [3],[18] 1,836                    
Investment, Identifier [Axis]: New ACI Buyer LLC | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9] 1,682                    
Cost [3],[4] 1,682                    
Fair Value [3],[4] 1,682                    
Investment, Identifier [Axis]: New ACI Buyer LLC | Subordinated 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[18] 3,256                    
Cost [3],[18] 3,256                    
Fair Value [3],[18] 3,256                    
Investment, Identifier [Axis]: New ACI Buyer LLC | Subordinated 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9] 1,537                    
Cost [3],[4] 1,537                    
Fair Value [3],[4] 1,537                    
Investment, Identifier [Axis]: New ACI Holdings LLC | Class A Common Units 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[18] 7,587                    
Fair Value [3],[18] 7,587                    
Investment, Identifier [Axis]: New ACI Holdings LLC | Class A Common Units 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4] 3,582                    
Fair Value [3],[4] 3,582                    
Investment, Identifier [Axis]: New ACI Holdings LLC | Class B Common Units                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4] 630                    
Fair Value [3],[4] 630                    
Investment, Identifier [Axis]: New Benevis Holdco, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[18],[49] 26,421                    
Cost [3],[18],[49] 26,421                    
Fair Value [3],[18],[49] 26,421                    
Investment, Identifier [Axis]: New Benevis Holdco, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[15],[47]       51,933              
Cost [7],[15],[47]       51,933              
Fair Value [7],[15],[47]       51,933              
Investment, Identifier [Axis]: New Benevis Holdco, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16],[47]       45,204              
Cost [7],[8],[16],[47]       45,204              
Fair Value [7],[8],[16],[47]       45,204              
Investment, Identifier [Axis]: New Benevis Holdco, Inc. | Subordinated                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 29,426 [3],[4],[9],[49]     26,878 [7],[8],[11],[47]              
Cost 29,300 [3],[4],[49]     26,483 [7],[8],[47]              
Fair Value 29,426 [3],[4],[49]     26,878 [7],[8],[47]              
Investment, Identifier [Axis]: New Benevis Topco, LLC / New Benevis Holdco, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 91,749     154,464     140,102        
Investment, Identifier [Axis]: New Benevis Topco, LLC | Common Stock 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[18],[49] 27,154                    
Fair Value [3],[18],[49] 24,446                    
Investment, Identifier [Axis]: New Benevis Topco, LLC | Common Stock 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[49] 12,768                    
Fair Value [3],[4],[49] 11,456                    
Investment, Identifier [Axis]: New Benevis Topco, LLC | Common stock 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[15],[47]       27,155              
Fair Value [7],[15],[47]       20,733              
Investment, Identifier [Axis]: New Benevis Topco, LLC | Common stock 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[47]       12,768              
Fair Value [7],[8],[47]       9,716              
Investment, Identifier [Axis]: New Permian Holdco, Inc. / New Permian Holdco, L.L.C.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 67,394     63,833     63,076        
Investment, Identifier [Axis]: New Permian Holdco, Inc. | Ordinary Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[49] 11,155                    
Fair Value [3],[4],[49] 11,000                    
Investment, Identifier [Axis]: New Permian Holdco, Inc. | Ordinary shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[47]       11,155              
Fair Value [7],[8],[47]       12,000              
Investment, Identifier [Axis]: New Permian Holdco, L.L.C. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 23,336 [3],[4],[9],[20],[49]     23,336 [7],[8],[11],[16],[47]              
Cost 23,336 [3],[4],[20],[49]     23,336 [7],[8],[16],[47]              
Fair Value 23,336 [3],[4],[20],[49]     23,336 [7],[8],[16],[47]              
Investment, Identifier [Axis]: New Permian Holdco, L.L.C. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 33,058 [3],[4],[9],[10],[20],[49]     28,497 [7],[8],[11],[12],[16],[47]              
Cost 33,058 [3],[4],[10],[20],[49]     28,497 [7],[8],[12],[16],[47]              
Fair Value 33,058 [3],[4],[10],[20],[49]     28,497 [7],[8],[12],[16],[47]              
Investment, Identifier [Axis]: New Permian Holdco, L.L.C. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 836 [3],[4],[9],[10],[49]     3,397 [7],[8],[11],[12],[47]              
Cost 0 [3],[4],[10],[49]     0 [7],[8],[12],[47]              
Fair Value 0 [3],[4],[10],[49]     0 [7],[8],[12],[47]              
Investment, Identifier [Axis]: Next Holdco, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,217 [3],[9],[17],[18]     6,264 [7],[11],[14],[15]              
Cost 6,189 [3],[17],[18]     6,232 [7],[14],[15]              
Fair Value 6,217 [3],[17],[18]     6,264 [7],[14],[15]              
Investment, Identifier [Axis]: Next Holdco, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 339 [3],[4],[9],[10]     339 [7],[8],[11],[12]              
Cost (3) [3],[4],[10]     (3) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Notorious Buyer, LLC | Common Stock                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[53] 7,339                    
Fair Value [3],[4],[53] 4,859                    
Investment, Identifier [Axis]: Notorious Buyer, LLC | Common stock                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[54]       7,339              
Fair Value [7],[8],[54]       7,339              
Investment, Identifier [Axis]: Notorious Topco, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,117 [3],[4],[9]     4,692 [7],[8],[11]              
Cost 5,117 [3],[4]     4,692 [7],[8]              
Fair Value 5,117 [3],[4]     4,692 [7],[8]              
Investment, Identifier [Axis]: Notorious Topco, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 938 [3],[4],[9],[10],[53]     938 [7],[8],[11],[12],[54]              
Cost 0 [3],[4],[10],[53]     0 [7],[8],[12],[54]              
Fair Value 0 [3],[4],[10],[53]     0 [7],[8],[12],[54]              
Investment, Identifier [Axis]: Notorious Topco, LLC | Subordinated                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,490 [3],[4],[9]     2,252 [7],[8],[11]              
Cost 2,490 [3],[4]     2,252 [7],[8]              
Fair Value 2,490 [3],[4]     2,252 [7],[8]              
Investment, Identifier [Axis]: OEConnection LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,609 [3],[9],[17],[18]     6,609 [11],[14],[15]              
Cost 6,585 [3],[17],[18]     6,582 [14],[15]              
Fair Value 6,560 [3],[17],[18]     6,620 [14],[15]              
Investment, Identifier [Axis]: OEConnection LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 495 [3],[4],[9],[10]     495 [8],[11],[12]              
Cost 0 [3],[4],[10]     0 [8],[12]              
Fair Value (4) [3],[4],[10]     1 [8],[12]              
Investment, Identifier [Axis]: OEConnection LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 618 [3],[4],[9],[10]     618 [8],[11],[12]              
Cost (3) [3],[4],[10]     (3) [8],[12]              
Fair Value (5) [3],[4],[10]     0 [8],[12]              
Investment, Identifier [Axis]: PDI TA Holdings, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,342              
Cost [7],[8],[12]       1,335              
Fair Value [7],[8],[12]       1,342              
Investment, Identifier [Axis]: PDI TA Holdings, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       488              
Cost [7],[8],[12]       (2)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: PDI TA Holdings, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 22,283 [3],[9],[13]     22,171 [7],[11],[19]              
Cost 22,205 [3],[13]     22,081 [7],[19]              
Fair Value 21,057 [3],[13]     22,171 [7],[19]              
Investment, Identifier [Axis]: PDI TA Holdings, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,830 [3],[4],[9]     509 [7],[8],[11],[16]              
Cost 1,822 [3],[4]     509 [7],[8],[16]              
Fair Value 1,730 [3],[4]     509 [7],[8],[16]              
Investment, Identifier [Axis]: PDI TA Holdings, Inc. | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 512                    
Cost [3],[4],[20] 512                    
Fair Value [3],[4],[20] 484                    
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 195 [3],[4],[9],[10],[20]     61 [7],[8],[11],[12],[16]              
Cost 196 [3],[4],[10],[20]     64 [7],[8],[12],[16]              
Fair Value 191 [3],[4],[10],[20]     61 [7],[8],[12],[16]              
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 292 [3],[4],[9],[10]     426 [7],[8],[11],[12]              
Cost (6) [3],[4],[10]     (9) [7],[8],[12]              
Fair Value (6) [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 21,994 [3],[9],[13]     22,163 [7],[11],[19]              
Cost 21,958 [3],[13]     22,118 [7],[19]              
Fair Value 21,554 [3],[13]     22,163 [7],[19]              
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 8,113 [3],[9],[17],[18]     8,175 [7],[11],[14],[15]              
Cost 8,113 [3],[17],[18]     8,175 [7],[14],[15]              
Fair Value 7,951 [3],[17],[18]     8,175 [7],[14],[15]              
Investment, Identifier [Axis]: PPVA Black Elk (Equity) LLC | Claim                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9] 14,500                    
Cost [3],[4] 14,500                    
Fair Value [3],[4] 2,755                    
Investment, Identifier [Axis]: PPVA Black Elk (Equity) LLC | Subordinated                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11]       14,500              
Cost 14,500     14,500 [7],[8]              
Fair Value 2,755     6,525 [7],[8]              
Investment, Identifier [Axis]: PPVA Black Elk (Equity) LLC, Subordinated                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount                     $ 20,000
Investment, Identifier [Axis]: PPVA Fund, L.P. | Claim                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [9],[55] 0                    
Cost [55] 0                    
Fair Value [55] 0                    
Investment, Identifier [Axis]: PPVA Fund, L.P. | Collateralized Financing                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [11],[56],[57]       0              
Cost [56],[57]       0              
Fair Value [56],[57]       0              
Investment, Identifier [Axis]: Permian Trust | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,409 [3],[4],[9],[29]     3,409 [7],[8],[11],[30]              
Cost 0 [3],[4],[29]     0 [7],[8],[30]              
Fair Value 0 [3],[4],[29]     0 [7],[8],[30]              
Investment, Identifier [Axis]: Permian Trust | Trust Claim                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 247 [3],[9],[29],[58]     247 [7],[11],[30],[59]              
Cost 0 [3],[29],[58]     0 [7],[30],[59]              
Fair Value 0 [3],[29],[58]     0 [7],[30],[59]              
Investment, Identifier [Axis]: PetVet Care Centers, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 27,648 [3],[9],[17],[18]     27,861 [7],[11],[14],[15]              
Cost 27,462 [3],[17],[18]     27,646 [7],[14],[15]              
Fair Value 23,788 [3],[17],[18]     26,649 [7],[14],[15]              
Investment, Identifier [Axis]: PetVet Care Centers, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,483 [3],[4],[9],[10],[20]     371 [7],[8],[11],[12],[16]              
Cost 1,468 [3],[4],[10],[20]     367 [7],[8],[12],[16]              
Fair Value 1,276 [3],[4],[10],[20]     355 [7],[8],[12],[16]              
Investment, Identifier [Axis]: PetVet Care Centers, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,225 [3],[4],[9],[10]     3,337 [7],[8],[11],[12]              
Cost (22) [3],[4],[10]     (33) [7],[8],[12]              
Fair Value (311) [3],[4],[10]     (145) [7],[8],[12]              
Investment, Identifier [Axis]: Pioneer Topco I, L.P. | Class A-2 Common Units                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[60] 2,000                    
Fair Value [3],[60] 1,600                    
Investment, Identifier [Axis]: Pioneer Topco I, L.P. | Class A-2 common units                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[61]       2,000              
Fair Value [7],[61]       2,200              
Investment, Identifier [Axis]: Planview Parent, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [4],[9],[20] 3,745                    
Cost [4],[20] 3,201                    
Fair Value [4],[20] 3,137                    
Investment, Identifier [Axis]: Planview Parent, Inc. | Second lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,231 [3],[4],[9],[20]     9,231 [7],[8],[11],[16]              
Cost 9,216 [3],[4],[20]     9,212 [7],[8],[16]              
Fair Value 6,415 [3],[4],[20]     8,827 [7],[8],[16]              
Investment, Identifier [Axis]: Power Grid Holdings, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[19]       15,597              
Cost [7],[19]       15,511              
Fair Value [7],[19]       15,597              
Investment, Identifier [Axis]: Power Grid Holdings, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       429              
Cost [7],[8],[12]       425              
Fair Value [7],[8],[12]       429              
Investment, Identifier [Axis]: Power Grid Holdings, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       3,861              
Cost [7],[8],[12]       (39)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Project Accelerate Parent, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 10,334 [3],[9],[24]     10,413 [7],[11],[25]              
Cost 10,298 [3],[24]     10,372 [7],[25]              
Fair Value 10,334 [3],[24]     10,413 [7],[25]              
Investment, Identifier [Axis]: Project Accelerate Parent, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,510 [3],[4],[9],[10]     1,510 [7],[8],[11],[12]              
Cost (8) [3],[4],[10]     (8) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: RLG Holdings, LLC | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 18,528 [3],[4],[9],[20]     7,184 [11],[14],[15]              
Cost 10,242 [3],[4],[20]     5,816 [14],[15]              
Fair Value 8,439 [3],[4],[20]     4,419 [14],[15]              
Investment, Identifier [Axis]: RLG Holdings, LLC | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,128 [3],[9],[17],[18]     4,163 [11],[14],[15]              
Cost 6,124 [3],[17],[18]     4,109 [14],[15]              
Fair Value 3,247 [3],[17],[18]     2,613 [14],[15]              
Investment, Identifier [Axis]: RLG Holdings, LLC | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[9],[17],[18] 4,131                    
Cost [3],[17],[18] 4,091                    
Fair Value [3],[17],[18] 1,882                    
Investment, Identifier [Axis]: RLG Holdings, LLC | First lien 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 1,188                    
Cost [3],[4],[20] 625                    
Fair Value [3],[4],[20] 541                    
Investment, Identifier [Axis]: RLG Holdings, LLC | Second lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 10,768                    
Cost [3],[4],[20] 1,542                    
Fair Value [3],[4],[20] 1,077                    
Investment, Identifier [Axis]: RailPros Parent, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,784 [3],[9],[17],[18]     5,828 [7],[11],[14],[15]              
Cost 5,761 [3],[17],[18]     5,801 [7],[14],[15]              
Fair Value 5,784 [3],[17],[18]     5,799 [7],[14],[15]              
Investment, Identifier [Axis]: RailPros Parent, LLC | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 537                    
Cost [3],[4],[10] 534                    
Fair Value [3],[4],[10] 537                    
Investment, Identifier [Axis]: RailPros Parent, LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,258 [3],[4],[9],[10]     899 [7],[8],[11],[12]              
Cost 0 [3],[4],[10]     (4) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     (4) [7],[8],[12]              
Investment, Identifier [Axis]: RailPros Parent, LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 899 [3],[4],[9],[10]     1,798 [7],[8],[11],[12]              
Cost (4) [3],[4],[10]     0 [7],[8],[12]              
Fair Value 0 [3],[4],[10]     (9) [7],[8],[12]              
Investment, Identifier [Axis]: RealPage, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [9],[17],[18] 1,953                    
Cost [17],[18] 1,857                    
Fair Value [17],[18] 1,934                    
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC | Trust Claim 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 152 [3],[9],[18]     152 [7],[11],[15]              
Cost 152 [3],[18]     152 [7],[15]              
Fair Value 152 [3],[18]     152 [7],[15]              
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC | Trust Claim 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 52 [3],[4],[9]     52 [7],[8],[11]              
Cost 52 [3],[4]     52 [7],[8]              
Fair Value 52 [3],[4]     52 [7],[8]              
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC | Warrants 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost 182 [3],[18]     182 [7],[15]              
Fair Value 272 [3],[18]     272 [7],[15]              
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC | Warrants 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost 62 [3],[4]     62 [7],[8]              
Fair Value 93 [3],[4]     93 [7],[8]              
Investment, Identifier [Axis]: Riskonnect Parent, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       6,349              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Sierra Enterprises, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       21,357              
Cost [7],[14],[15]       21,213              
Fair Value [7],[14],[15]       21,197              
Investment, Identifier [Axis]: Sierra Enterprises, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       2,717              
Cost [7],[8],[12]       (20)              
Fair Value [7],[8],[12]       (20)              
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 1,889     2,000     2,000        
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation | Ordinary Shares 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[18],[29] 11,501                    
Fair Value [3],[18],[29] 1,700                    
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation | Ordinary Shares 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[29] 1,282                    
Fair Value [3],[4],[29] 189                    
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation | Ordinary shares 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[15],[30]       11,501              
Fair Value [7],[15],[30]       1,799              
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation | Ordinary shares 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[30]       1,282              
Fair Value [7],[8],[30]       201              
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc. | Series A Preferred Shares 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[13] 19,636                    
Fair Value [3],[13] 15,467                    
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc. | Series A Preferred Shares 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4] 91                    
Fair Value [3],[4] 71                    
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc. | Series A preferred shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 19,839     25,639              
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc. | Series A preferred shares 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[19]       18,953              
Fair Value [7],[19]       18,204              
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc. | Series A preferred shares 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[16]       6,534              
Fair Value [7],[8],[16]       6,276              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,695 [3],[4],[9],[10],[62]     2,695 [7],[8],[11],[12],[63]              
Cost 0 [3],[4],[10],[62]     0 [7],[8],[12],[63]              
Fair Value 0 [3],[4],[10],[62]     0 [7],[8],[12],[63]              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 27,354 [3],[4],[9],[20]     22,939 [7],[8],[11],[16]              
Cost 24,795 [3],[4],[20]     22,392 [7],[8],[16]              
Fair Value 17,123 [3],[4],[20]     14,820 [7],[8],[16]              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 10,213 [3],[4],[9],[20]     4,057 [7],[8],[11],[16]              
Cost 6,233 [3],[4],[20]     2,878 [7],[8],[16]              
Fair Value 6,393 [3],[4],[20]     2,594 [7],[8],[16]              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp. | Subordinated 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 424 [3],[4],[9]     337 [7],[11],[15]              
Cost 359 [3],[4]     337 [7],[15]              
Fair Value 424 [3],[4]     337 [7],[15]              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp. | Subordinated 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 366 [3],[9],[18]     325 [7],[8],[11]              
Cost 366 [3],[18]     325 [7],[8]              
Fair Value 366 [3],[18]     325 [7],[8]              
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC / Edmentum Ultimate Holdings, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 45,155     40,365     91,620        
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC | Class B-1 Common Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 48,080     48,080              
Cost 43,212 [3],[4],[29]     43,212 [8],[30],[51]              
Fair Value 5,000 [3],[4],[29]     5,000 [8],[30],[51]              
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC | Class B-2 Common Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 29,707     29,707              
Cost 24,839 [3],[4],[29]     24,839 [8],[30],[51]              
Fair Value 0 [3],[4],[29]     0 [8],[30],[51]              
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC | Series C-2 Preferred Shares                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,737                    
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC | Series C-2 Preferred Units                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost 9,737 [3],[4],[29]     8,719 [7],[8],[30]              
Fair Value 9,737 [3],[4],[29]     8,719 [7],[8],[30]              
Investment, Identifier [Axis]: Tempo Acquisition, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [4],[9],[20],[23] 27,466                    
Cost [4],[20],[23] 20,457                    
Fair Value [4],[20],[23] 21,864                    
Investment, Identifier [Axis]: Tennessee Bidco Limited | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 20,218 [3],[4],[9],[20]     19,815 [7],[8],[11],[16]              
Cost 20,296 [3],[4],[20]     19,903 [7],[8],[16]              
Fair Value 20,218 [3],[4],[20]     19,815 [7],[8],[16]              
Investment, Identifier [Axis]: Tennessee Bidco Limited | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 16,576 [3],[9],[17],[18]     16,245 [7],[11],[14],[15]              
Cost 16,576 [3],[17],[18]     16,245 [7],[14],[15]              
Fair Value 16,576 [3],[17],[18]     16,245 [7],[14],[15]              
Investment, Identifier [Axis]: Tennessee Bidco Limited | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 899 [3],[9],[17],[18]     890 [7],[11],[14],[15]              
Cost 899 [3],[17],[18]     890 [7],[14],[15]              
Fair Value 899 [3],[17],[18]     890 [7],[14],[15]              
Investment, Identifier [Axis]: TigerConnect, Inc. | First lien - Drawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[12],[15]       3,741              
Cost [7],[12],[15]       3,741              
Fair Value [7],[12],[15]       3,741              
Investment, Identifier [Axis]: TigerConnect, Inc. | First lien - Drawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       42              
Cost [7],[8],[12]       42              
Fair Value [7],[8],[12]       42              
Investment, Identifier [Axis]: TigerConnect, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       4,267              
Cost [7],[8],[12]       (43)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: TigerConnect, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 29,875 [3],[4],[9],[20]     29,875 [7],[8],[11],[16]              
Cost 29,755 [3],[4],[20]     29,728 [7],[8],[16]              
Fair Value 29,576 [3],[4],[20]     29,875 [7],[8],[16]              
Investment, Identifier [Axis]: TigerConnect, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,741 [3],[9],[18]     3,054 [7],[8],[11],[16]              
Cost 3,741 [3],[18]     3,033 [7],[8],[16]              
Fair Value 3,704 [3],[18]     3,054 [7],[8],[16]              
Investment, Identifier [Axis]: TigerConnect, Inc. | First lien 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 3,054                    
Cost [3],[4],[20] 3,037                    
Fair Value [3],[4],[20] 3,023                    
Investment, Identifier [Axis]: TigerConnect, Inc. | First lien 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9] 42                    
Cost [3],[4] 42                    
Fair Value [3],[4] 41                    
Investment, Identifier [Axis]: TigerConnect, Inc.| First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 4,267                    
Cost [3],[4],[10] (43)                    
Fair Value [3],[4],[10] (43)                    
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 818 [4],[9],[10]     818 [7],[8],[11],[12]              
Cost (8) [4],[10]     (8) [7],[8],[12]              
Fair Value 0 [4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 8,303 [9],[17],[18]     8,345 [7],[11],[14],[15]              
Cost 8,275 [17],[18]     8,310 [7],[14],[15]              
Fair Value 8,303 [17],[18]     8,345 [7],[14],[15]              
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,784 [9],[17],[18]     2,798 [7],[11],[14],[15]              
Cost 2,773 [17],[18]     2,784 [7],[14],[15]              
Fair Value 2,784 [17],[18]     2,798 [7],[14],[15]              
Investment, Identifier [Axis]: USRP Holdings, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 12,299 [3],[9],[17],[18]     12,396 [7],[11],[14],[15]              
Cost 12,253 [3],[17],[18]     12,341 [7],[14],[15]              
Fair Value 12,299 [3],[17],[18]     12,396 [7],[14],[15]              
Investment, Identifier [Axis]: USRP Holdings, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 893 [3],[4],[9],[10]     893 [7],[8],[11],[12]              
Cost (9) [3],[4],[10]     (9) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Ultimus Group Midco, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       9,116              
Cost [7],[14],[15]       9,073              
Fair Value [7],[14],[15]       9,070              
Investment, Identifier [Axis]: Ultimus Group Midco, LLC | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,139              
Cost [7],[8],[12]       (6)              
Fair Value [7],[8],[12]       (6)              
Investment, Identifier [Axis]: Ultimus Group Midco, LLC | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       3,039              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       (15)              
Investment, Identifier [Axis]: UniTek Global Services, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Fair Value 93,084     73,181     $ 107,524        
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Ordinary Shares 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[18],[49] 1,925                    
Fair Value [3],[18],[49] 0                    
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Ordinary Shares 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[49] 532                    
Fair Value [3],[4],[49] 0                    
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Ordinary shares 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[15],[47]       1,925              
Fair Value [7],[15],[47]       0              
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Ordinary shares 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[47]       532              
Fair Value [7],[8],[47]       0              
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Preferred Shares 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[49] 71,326                    
Fair Value [3],[4],[49] 74,650                    
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Preferred Shares 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[49] 29,318                    
Fair Value [3],[4],[49] 18,434                    
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Preferred Shares 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[18],[49] 26,946                    
Fair Value [3],[18],[49] 0                    
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Preferred Shares 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[49] 7,447                    
Fair Value [3],[4],[49] 0                    
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Preferred Shares 5                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [3],[4],[49] 0                    
Fair Value [3],[4],[49] 0                    
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Preferred shares 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[47]       61,162              
Fair Value [7],[8],[47]       64,486              
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Preferred shares 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[47]       29,318              
Fair Value [7],[8],[47]       8,695              
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Preferred shares 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[15],[47]       26,946              
Fair Value [7],[15],[47]       0              
Investment, Identifier [Axis]: UniTek Global Services, Inc. | Preferred shares 4                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Cost [7],[8],[47]       7,447              
Fair Value [7],[8],[47]       0              
Investment, Identifier [Axis]: Vehlo Purchaser, LLC | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,027 [3],[4],[9]     6,073 [8],[11]              
Cost 5,991 [3],[4]     6,022 [8]              
Fair Value 6,027 [3],[4]     6,042 [8]              
Investment, Identifier [Axis]: Viper Bidco, Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 1,838                    
Cost [3],[4],[10] 0                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: Viper Bidco, Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[10] 3,320                    
Cost [3],[4],[10] (17)                    
Fair Value [3],[4],[10] 0                    
Investment, Identifier [Axis]: Viper Bidco,Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 15,686                    
Investment, Identifier [Axis]: Viper Bidco. Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,838              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Viper Bidco. Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       3,320              
Cost [7],[8],[12]       (17)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: Viper Bidco. Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount     £ 11,819 16,051   £ 11,910          
Cost 14,931 [3],[4],[20],[52]     15,037 [7],[8],[16],[51]              
Fair Value 15,686 [3],[4],[20],[52]     16,051 [7],[8],[16],[51]              
Investment, Identifier [Axis]: Viper Bidco. Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,288 [3],[4],[9],[20]     2,306 [7],[8],[11],[16]              
Cost 2,278 [3],[4],[20]     2,294 [7],[8],[16]              
Fair Value 2,288 [3],[4],[20]     2,306 [7],[8],[16]              
Investment, Identifier [Axis]: WEG Sub Intermediate Holdings, LLC | Subordinated                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,140 [3],[4],[9]     4,665 [7],[8],[11]              
Cost 5,101 [3],[4]     4,623 [7],[8]              
Fair Value 5,140 [3],[4]     4,665 [7],[8]              
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,040 [3],[4],[9],[10]     2,040 [7],[8],[11],[12]              
Cost (6) [3],[4],[10]     (6) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: Xactly Corporation | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 22,500 [3],[9],[13]     22,500 [7],[11],[19]              
Cost 22,493 [3],[13]     22,489 [7],[19]              
Fair Value 21,263 [3],[13]     22,232 [7],[19]              
Investment, Identifier [Axis]: Xactly Corporation | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 992 [3],[4],[9],[10]     992 [7],[8],[11],[12]              
Cost (10) [3],[4],[10]     (10) [7],[8],[12]              
Fair Value (55) [3],[4],[10]     (12) [7],[8],[12]              
Investment, Identifier [Axis]: YLG Holdings, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 623 [3],[4],[9],[10]     394 [7],[8],[11],[12]              
Cost 619 [3],[4],[10]     392 [7],[8],[12]              
Fair Value 623 [3],[4],[10]     394 [7],[8],[12]              
Investment, Identifier [Axis]: YLG Holdings, Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 39 [3],[4],[9],[10]     271 [7],[8],[11],[12]              
Cost 0 [3],[4],[10]     (1) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: YLG Holdings, Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 309 [3],[4],[9],[10]     309 [7],[8],[11],[12]              
Cost (2) [3],[4],[10]     (2) [7],[8],[12]              
Fair Value 0 [3],[4],[10]     0 [7],[8],[12]              
Investment, Identifier [Axis]: YLG Holdings, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 21,498 [3],[9],[24]     21,661 [7],[11],[25]              
Cost 21,477 [3],[24]     21,638 [7],[25]              
Fair Value 21,498 [3],[24]     21,661 [7],[25]              
Investment, Identifier [Axis]: YLG Holdings, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,276 [3],[9],[17],[18]     4,309 [7],[11],[14],[15]              
Cost 4,259 [3],[17],[18]     4,289 [7],[14],[15]              
Fair Value 4,276 [3],[17],[18]     4,309 [7],[14],[15]              
Investment, Identifier [Axis]: eResearchTechnology, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12],[16]       301              
Cost [7],[8],[12],[16]       290              
Fair Value [7],[8],[12],[16]       301              
Investment, Identifier [Axis]: eResearchTechnology, Inc. | First lien - Undrawn 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,847              
Cost [7],[8],[12]       0              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: eResearchTechnology, Inc. | First lien - Undrawn 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[12]       1,074              
Cost [7],[8],[12]       (11)              
Fair Value [7],[8],[12]       0              
Investment, Identifier [Axis]: eResearchTechnology, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[11],[14],[15]       11,380              
Cost [7],[14],[15]       11,275              
Fair Value [7],[14],[15]       11,380              
Investment, Identifier [Axis]: eResearchTechnology, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       1,889              
Cost [7],[8],[16]       1,877              
Fair Value [7],[8],[16]       1,889              
Investment, Identifier [Axis]: iCIMS, Inc. | First lien                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [3],[4],[9],[20] 7,366                    
Cost [3],[4],[20] 7,341                    
Fair Value [3],[4],[20] 6,782                    
Investment, Identifier [Axis]: iCIMS, Inc. | First lien - Drawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,588 [3],[4],[9],[10]     1,165 [7],[8],[11],[12]              
Cost 1,580 [3],[4],[10]     1,160 [7],[8],[12]              
Fair Value 1,444 [3],[4],[10]     1,134 [7],[8],[12]              
Investment, Identifier [Axis]: iCIMS, Inc. | First lien - Undrawn                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,941 [3],[4],[9],[10]     2,365 [7],[8],[11],[12]              
Cost (17) [3],[4],[10]     (21) [7],[8],[12]              
Fair Value (175) [3],[4],[10]     (64) [7],[8],[12]              
Investment, Identifier [Axis]: iCIMS, Inc. | First lien 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       44,742              
Cost [7],[8],[16]       44,590              
Fair Value [7],[8],[16]       43,538              
Investment, Identifier [Axis]: iCIMS, Inc. | First lien 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount [7],[8],[11],[16]       7,366              
Cost [7],[8],[16]       7,332              
Fair Value [7],[8],[16]       7,253              
SLP III                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 930,815     971,559              
Cost 920,103     957,232              
Fair Value 872,188     941,427              
SLP III | Funded Investments                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 928,222     964,692              
Cost 920,114     957,258              
Fair Value 872,238     941,399              
SLP III | Unfunded Investments                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,593     6,867              
Cost (11)     (26)              
Fair Value (50)     28              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | ADMI Corp. (aka Aspen Dental)                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,309     2,327              
Cost 2,306     2,323              
Fair Value 2,188     2,214              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Accelya Lux Finco S.a r.l.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 16,363     16,487              
Cost 16,068     16,162              
Fair Value 14,809     16,435              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Allium Buyer LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,467                    
Cost 9,325                    
Fair Value 9,502                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | AmSpec Parent, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,422     9,493              
Cost 9,407     9,478              
Fair Value 9,457     9,540              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Ardonagh Midco 3 Limited                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,975     1,990              
Cost 1,968     1,982              
Fair Value 1,961     1,990              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Asurion, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,411                    
Cost 4,390                    
Fair Value 4,097                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Asurion, LLC 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       13,000              
Cost       12,931              
Fair Value       13,039              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Asurion, LLC 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       3,618              
Cost       3,517              
Fair Value       3,621              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Asurion, LLC 3                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       1,985              
Cost       1,958              
Fair Value       1,988              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | BCPE Empire Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       11,821              
Cost       11,761              
Fair Value       11,718              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | BCPE Empire Holdings, Inc. 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 10,889                    
Cost 10,841                    
Fair Value 10,548                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | BCPE Empire Holdings, Inc. 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,146                    
Cost 7,048                    
Fair Value 6,894                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | BIFM CA Buyer Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 8,981     9,049              
Cost 8,969     9,032              
Fair Value 8,989     9,123              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | BW Holding, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       603              
Cost       597              
Fair Value       616              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Bach Finance Limited                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       2,107              
Cost       2,103              
Fair Value       2,117              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Bella Holding Company, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,683     7,722              
Cost 7,609     7,707              
Fair Value 7,701     7,760              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Berlin Packaging L.L.C.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 8,669     8,735              
Cost 8,668     8,734              
Fair Value 8,616     8,765              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Boxer Parent Company Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       7,416              
Cost       7,400              
Fair Value       7,405              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | BradyPLUS Holdings, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       7,182              
Cost       7,075              
Fair Value       7,118              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | CVET Midco 2, L.P.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,631     9,706              
Cost 9,388     9,410              
Fair Value 9,375     8,749              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Capstone Borrower, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       3,124              
Cost       3,109              
Fair Value       3,126              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Cardinal Parent, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,535     11,626              
Cost 11,466     11,513              
Fair Value 10,375     11,384              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Chrysaor Bidco S.a r.l.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,099     2,115              
Cost 2,099     2,115              
Fair Value 2,109     2,133              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Citrin Cooperman Advisors LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,838     6,719              
Cost 4,814     6,711              
Fair Value 4,786     6,747              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Cleanova US Holdings LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 17,367     18,741              
Cost 17,219     18,565              
Fair Value 17,378     18,741              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Cloudera, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,952     14,062              
Cost 13,836     13,904              
Fair Value 13,039     13,511              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Clydesdale Acquisition Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,266     9,313              
Cost 9,262     9,308              
Fair Value 9,107     9,316              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Cohnreznick Advisory LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,162     9,114              
Cost 7,142     9,092              
Fair Value 7,114     9,177              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Confluent Health, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,567     4,603              
Cost 4,558     4,592              
Fair Value 4,266     4,120              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Confluent Medical Technologies, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       6,740              
Cost       6,723              
Fair Value       6,799              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | ConnectWise, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,422     11,512              
Cost 11,415     11,502              
Fair Value 11,240     11,332              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Convey Health Solutions, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,058     9,123              
Cost 8,706     9,012              
Fair Value 978     6,661              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | CoreLogic, Inc. (fka First American Corporation, The)                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,000                    
Cost 8,820                    
Fair Value 8,539                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Cornerstone OnDemand, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,513     2,533              
Cost 2,509     2,527              
Fair Value 1,594     2,335              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Cub Financing Intermediate, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 925                    
Cost 916                    
Fair Value 931                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | DG Investment Intermediate Holdings 2, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,928     11,008              
Cost 11,892     10,959              
Fair Value 11,958     11,050              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Dayforce Bidco, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,535                    
Cost 5,373                    
Fair Value 5,337                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Dealer Tire Financial, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,349     11,435              
Cost 11,307     11,388              
Fair Value 11,259     11,464              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Disco Parent, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       7,250              
Cost       7,233              
Fair Value       7,304              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Discovery Purchaser Corporation                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 10,125     13,856              
Cost 9,909     13,496              
Fair Value 10,102     13,349              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | EAB Global, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 10,006     10,083              
Cost 9,834     9,881              
Fair Value 8,916     8,990              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Eagle Parent Corp.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,758     13,866              
Cost 13,635     13,709              
Fair Value 13,851     13,920              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Eisner Advisory Group LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,257     8,546              
Cost 11,168     8,494              
Fair Value 11,252     8,617              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Embecta Corp.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,753     4,002              
Cost 3,760     4,012              
Fair Value 3,184     4,015              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | FNZ Group Entities Limited                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 10,101     10,178              
Cost 9,940     9,997              
Fair Value 6,530     8,099              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Finastra USA, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 12,311     12,373              
Cost 12,208     12,259              
Fair Value 11,905     12,135              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | First Advantage Holdings, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       4,223              
Cost       4,181              
Fair Value       4,186              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Flash Charm, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,501     16,341              
Cost 6,499     16,333              
Fair Value 5,742     15,290              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Forgent Intermediate IV LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       12,749              
Cost       12,621              
Fair Value       12,685              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Foundational Education Group, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,953     14,063              
Cost 13,896     13,984              
Fair Value 13,032     13,001              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Groundworks, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 10,024     10,100              
Cost 9,997     9,871              
Fair Value 10,038     10,163              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | HIG Finance 2 Limited                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,451                    
Cost 6,279                    
Fair Value 6,225                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | HIG Operations Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       11,849              
Cost       11,806              
Fair Value       11,849              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | HIG Operations Holdings, Inc. 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,760                    
Cost 11,722                    
Fair Value 11,760                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | HIG Operations Holdings, Inc. 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,115                    
Cost 1,110                    
Fair Value 1,115                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | HP PHRG Borrower, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 16,516     16,641              
Cost 16,420     16,534              
Fair Value 16,449     16,572              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Heartland Dental, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,718     13,896              
Cost 3,713     13,862              
Fair Value 3,715     13,970              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Help/Systems Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,057     11,140              
Cost 11,041     11,121              
Fair Value 8,379     10,120              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Houghton Mifflin Harcourt Company                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,924     7,986              
Cost 7,792     7,818              
Fair Value 5,398     7,069              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Inizio Group Limited                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 12,747     12,747              
Cost 12,690     12,669              
Fair Value 12,476     12,444              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Jones DesLauriers Insurance Management Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,461     2,687              
Cost 6,357     2,680              
Fair Value 6,386     2,693              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Kaseya Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 12,723     12,820              
Cost 12,702     12,797              
Fair Value 10,651     12,847              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Kestra Advisor Services Holdings A, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       3,749              
Cost       3,742              
Fair Value       3,760              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | KnowBe4, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,119     13,128              
Cost 7,118     13,125              
Fair Value 5,047     13,152              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | LI Group Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,998     3,033              
Cost 2,996     3,031              
Fair Value 2,990     3,055              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | LSCS Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 14,751     14,863              
Cost 14,671     14,774              
Fair Value 14,668     14,590              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | LTR Intermediate Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,878     7,917              
Cost 7,842     7,878              
Fair Value 7,907     7,949              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | MED ParentCo, LP                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,512     9,880              
Cost 6,494     9,840              
Fair Value 6,508     9,921              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Marcel Bidco LLC (Marcel Bidco GmbH)                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,034     2,809              
Cost 2,019     2,777              
Fair Value 1,986     2,826              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Mavis Tire Express Services Topco, Corp.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,937     12,593              
Cost 13,868     12,549              
Fair Value 13,823     12,653              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Michael Baker International, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       5,534              
Cost       5,533              
Fair Value       5,553              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Michael Baker International, LLC 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,492                    
Cost 5,492                    
Fair Value 5,499                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Michael Baker International, LLC 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,163                    
Cost 2,112                    
Fair Value 2,166                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Neon Maple Purchaser Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,717     3,510              
Cost 5,721     3,523              
Fair Value 5,570     3,519              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Nexus Buyer LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,906     14,012              
Cost 13,844     13,941              
Fair Value 13,779     13,927              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Nielsen Consumer, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,728     5,771              
Cost 5,399     5,388              
Fair Value 5,711     5,787              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | OCM System One Buyer CTB, LLC (Sentinel Purchaser II Holdco, LLC)                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,574                    
Cost 7,536                    
Fair Value 7,564                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | OSTTRA Group Ltd                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 10,277                    
Cost 10,267                    
Fair Value 10,290                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | OVG Business Services, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,748     2,769              
Cost 2,736     2,755              
Fair Value 2,763     2,778              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Oceankey (U.S.) II Corp.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,904     14,014              
Cost 13,908     14,019              
Fair Value 13,757     13,841              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Orbit Private Holdings I Ltd                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,315     9,085              
Cost 9,284     9,051              
Fair Value 9,332     9,134              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Orion Advisor Solutions, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       1,500              
Cost       1,501              
Fair Value       1,511              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Orion Midco Ltd                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       8,102              
Cost       8,095              
Fair Value       8,150              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Osaic Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,547     12,357              
Cost 5,547     12,327              
Fair Value 5,504     12,423              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Osmose Utilities Services, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,842     13,951              
Cost 13,471     13,430              
Fair Value 13,826     13,742              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Outcomes Group Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,057     4,088              
Cost 4,045     4,074              
Fair Value 4,081     4,119              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Paradigm Parent, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 625                    
Cost 556                    
Fair Value 584                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Pearls (Netherlands) Bidco B.V.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,202     8,959              
Cost 1,162     8,576              
Fair Value 1,141     8,123              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Perforce Software, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,004     4,035              
Cost 3,992     4,021              
Fair Value 2,055     3,426              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Physician Partners, LLC 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,336     2,360              
Cost 3,233     2,303              
Fair Value 3,385     1,974              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Physician Partners, LLC 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,840     2,805              
Cost 2,828     2,790              
Fair Value 2,746     1,353              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Pioneer AcquisitionCo, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,707     7,924              
Cost 4,696     7,904              
Fair Value 4,683     7,968              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Planview Parent, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,401     13,503              
Cost 13,335     13,397              
Fair Value 11,223     12,995              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Pretium PKG Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,600                    
Cost 5,574                    
Fair Value 5,556                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Project Alpha Intermediate Holding, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,403     13,505              
Cost 13,229     13,302              
Fair Value 9,473     13,500              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Pushpay USA Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,798     13,903              
Cost 13,781     13,884              
Fair Value 12,510     13,911              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Quartz AcquireCo, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 2,619     3,510              
Cost 2,610     3,497              
Fair Value 2,280     3,510              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | RLG Holdings, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,050     7,106              
Cost 6,862     6,843              
Fair Value 3,211     4,372              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | RealPage, Inc. 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,509     3,047              
Cost 5,500     3,043              
Fair Value 5,444     3,048              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | RealPage, Inc. 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,422     4,963              
Cost 7,342     4,945              
Fair Value 7,351     4,985              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Rithum Holdings, Inc. (fka CommerceHub, Inc.)                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 15,626     15,744              
Cost 15,535     15,644              
Fair Value 14,743     15,769              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | RxB Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,092     5,156              
Cost 5,002     5,053              
Fair Value 5,098     5,098              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | STATS Intermediate Holdings, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,950                    
Cost 9,602                    
Fair Value 9,863                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Secretariat Advisors LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,717     8,957              
Cost 9,686     8,920              
Fair Value 9,422     8,994              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Secure Acquisition, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,819     500              
Cost 3,818     501              
Fair Value 3,831     505              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | SonarSource Financing, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,054     11,485              
Cost 10,909     11,313              
Fair Value 10,778     11,370              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Sovos Compliance, LLC (fka Taxware, LLC)                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,036     8,767              
Cost 10,945     8,775              
Fair Value 10,746     8,803              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Spring Education Group, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,062     13,163              
Cost 12,966     13,051              
Fair Value 13,074     13,254              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Storable, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 9,882     4,607              
Cost 9,811     4,606              
Fair Value 8,562     4,635              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Summit Acquisition Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 6,421     5,970              
Cost 6,397     5,944              
Fair Value 6,443     6,022              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Sword Purchaser, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,460                    
Cost 4,237                    
Fair Value 4,457                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Symplr Software, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 15,120     15,240              
Cost 15,091     15,193              
Fair Value 12,676     12,984              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | TRC Companies LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       9,377              
Cost       9,352              
Fair Value       9,418              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Team.blue Finco SARL                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,985     8,586              
Cost 5,991     8,595              
Fair Value 5,873     8,642              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Tegra118 Wealth Solutions, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,727                    
Cost 11,641                    
Fair Value 11,797                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Tempo Acquisition, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 4,032                    
Cost 3,420                    
Fair Value 3,209                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Therapy Brands Holdings LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,943     3,975              
Cost 3,938     3,966              
Fair Value 3,943     3,679              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Thermostat Purchaser III, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 13,402     13,506              
Cost 13,398     13,501              
Fair Value 13,214     13,483              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | TransDigm Inc. 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       3,510              
Cost       3,519              
Fair Value       3,529              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | TransDigm Inc. 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       2,106              
Cost       2,111              
Fair Value       2,116              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Tricorbraun Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,035     11,122              
Cost 11,001     11,083              
Fair Value 10,582     10,798              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | TruGreen Limited Partnership                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,316                    
Cost 5,087                    
Fair Value 5,192                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | UKG Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,269                    
Cost 5,183                    
Fair Value 5,121                    
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | US Fertility Enterprises, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 7,454     6,875              
Cost 7,420     6,841              
Fair Value 7,480     6,910              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | VSTG Intermediate Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,102     11,189              
Cost 11,095     11,180              
Fair Value 10,928     11,189              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | VT Topco, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       10,672              
Cost       10,520              
Fair Value       10,541              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Valcour Packaging, LLC 1                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,195     2,256              
Cost 11,267     2,238              
Fair Value 11,297     2,282              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Valcour Packaging, LLC 2                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,212     3,178              
Cost 3,212     3,178              
Fair Value 2,559     2,480              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Viant Medical Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 11,367     11,454              
Cost 11,349     11,434              
Fair Value 11,184     11,358              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Xplor T1, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 16,933     19,791              
Cost 16,863     19,706              
Fair Value 16,382     19,840              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Zelis Cost Management Buyer, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 19,316     19,463              
Cost 19,318     19,463              
Fair Value 19,249     19,342              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | Zest Acquisition Corp.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 5,879     5,236              
Cost 5,791     5,160              
Fair Value 5,791     5,236              
SLP III | Investment, Identifier [Axis]: Funded Investments - First lien | athenahealth Group Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 3,078     12,117              
Cost 3,078     12,005              
Fair Value 3,078     12,155              
SLP III | Investment, Identifier [Axis]: Largest Portfolio Company Investment                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 19,316     19,791              
SLP III | Investment, Identifier [Axis]: Top Five Largest Portfolio Company Investments                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 88,167     93,239              
SLP III | Investment, Identifier [Axis]: Unfunded Investments - First lien | Citrin Cooperman Advisors LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,022     2,273              
Cost (10)     (23)              
Fair Value (15)     9              
SLP III | Investment, Identifier [Axis]: Unfunded Investments - First lien | Cohnreznick Advisory LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       1,344              
Cost       (3)              
Fair Value       9              
SLP III | Investment, Identifier [Axis]: Unfunded Investments - First lien | HIG Operations Holdings, Inc.                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount       1,121              
Cost       0              
Fair Value       0              
SLP III | Investment, Identifier [Axis]: Unfunded Investments - First lien | Secretariat Advisors LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 1,188     1,087              
Cost 1     0              
Fair Value (36)     5              
SLP III | Investment, Identifier [Axis]: Unfunded Investments - First lien | US Fertility Enterprises, LLC                      
Investment Company, Nonconsolidated Subsidiary [Line Items]                      
Principal Amount 383     1,042              
Cost (2)     0              
Fair Value $ 1     $ 5              
[1] New Mountain Finance Corporation (the "Company") generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the "Securities Act"). These investments are generally subject to certain limitations on resale, and may be deemed to be "restricted securities" under the Securities Act.
[2] New Mountain Finance Corporation (the "Company") generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the "Securities Act"). These investments are generally subject to certain limitations on resale, and may be deemed to be "restricted securities" under the Securities Act.
[3] The fair value of the Company's investment is determined using unobservable inputs that are significant to the overall fair value measurement. See Note 4. Fair Value, for details
[4] Investment is held by New Mountain Finance Corporation.
[5] The Company holds ordinary shares in AAC Lender Holdings, LLC and two first lien term loans, a first lien revolver and subordinated notes in American Achievement Corporation, a partially-owned subsidiary of AAC Lender Holdings, LLC.
[6] The Company holds ordinary shares in AAC Lender Holdings, LLC and two first lien term loans, a first lien revolver and subordinated notes in American Achievement Corporation, a partially-owned subsidiary of AAC Lender Holdings, LLC.
[7] The fair value of the Company's investment is determined using unobservable inputs that are significant to the overall fair value measurement. See Note 4. Fair Value, for details.
[8] Investment is held by New Mountain Finance Corporation
[9] Par amount is denominated in United States Dollar unless otherwise noted, which may include British Pound ("£") and/or Euro ("€")
[10] Par value amounts represent the drawn or undrawn (as indicated in type of investment) portion of revolvers or delayed draws. Cost amounts represent the cash received at settlement date net of the impact of paydowns and cash paid for drawn revolvers or delayed draws
[11] Par amount is denominated in United States Dollar unless otherwise noted, which may include British Pound ("£") and/or Euro ("€").
[12] Par value amounts represent the drawn or undrawn (as indicated in type of investment) portion of revolvers or delayed draws. Cost amounts represent the cash received at settlement date net of the impact of paydowns and cash paid for drawn revolvers or delayed draws.
[13] Investment is held by New Mountain Finance SBIC, L.P.
[14] Investment is pledged as collateral for the Holdings Credit Facility, a revolving credit facility among the Company, as the Collateral Manager, New Mountain Finance Holdings, L.L.C. as the Borrower, Wells Fargo Securities, LLC, as the Administrative Agent, and Wells Fargo Bank, National Association, as the Lender and Collateral Custodian. See Note 7. Borrowings, for details.
[15] Investment is held by New Mountain Finance Holdings, L.L.C.
[16] Investment is pledged as collateral for the NMFC Credit Facility, a revolving credit facility among the Company as the Borrower, Sumitomo Mitsui Banking Corporation, as administrative agent, sole lead arranger, and sole book runner, and the lenders party thereto. See Note 7. Borrowings, for details.
[17] Investment is pledged as collateral for the Holdings Credit Facility, a revolving credit facility among the Company, as the Collateral Manager, New Mountain Finance Holdings, L.L.C., as the Borrower, Wells Fargo Securities, LLC, as the Administrative Agent, and Wells Fargo Bank, National Association, as the Lender and Collateral Custodian. See Note 7. Borrowings, for details
[18] Investment is held by New Mountain Finance Holdings, L.L.C.
[19] Investment is held by New Mountain Finance SBIC, L.P.
[20] Investment is pledged as collateral for the NMFC Credit Facility, a revolving credit facility among the Company, as the Borrower, Sumitomo Mitsui Banking Corporation, as Administrative Agent, sole Book Runner and Joint Lead Arrangers along with Deutsche Bank Securities Inc., State Street Bank and Trust Company and Wells Fargo Securities, LLC, and the lenders party thereto. See Note 7. Borrowings, for details.
[21] The Company holds investments in ACI Parent Inc. and a wholly-owned subsidiary of ACI Parent Inc. The Company holds a first lien term loan, two first lien delayed draws and a first lien revolver in ACI Group Holdings, Inc. and preferred equity in ACI Parent Inc. . The Company's preferred equity investment is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of December 31, 2025, the Company's stated value of its equity investment, plus unpaid compounded dividends, was $20,249.
[22] Indicates assets that the Company deems to be “non-qualifying assets” under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70.0% of the Company’s total assets at the time of acquisition of any additional non-qualifying assets. As of December 31, 2025, 15.4% of the Company’s total assets are represented by investments at fair value that are considered non-qualifying assets.
[23] Indicates assets that the Company deems to be “non-qualifying assets” under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70.0% of the Company’s total assets at the time of acquisition of any additional non-qualifying assets. As of September 30, 2026, 19.9% of the Company’s total assets are represented by investments at fair value that are considered non-qualifying assets.
[24] Investment is held by New Mountain Finance SBIC II, L.P.
[25] Investment is held by New Mountain Finance SBIC II, L.P.
[26] The Company's preferred equity investment in Dealer Tire Holdings, LLC is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of September 30, 2026, the Company's stated value of its equity investment, plus unpaid compounded dividends, was $27,116.
[27] The Company's preferred equity investment in Dealer Tire Holdings, LLC is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of December 31, 2025, the Company's stated value of its share, plus unpaid compounded dividends, was $90,671.
[28] The Company holds investments in two wholly-owned subsidiaries of Diamond Parent Holdings Corp. The Company holds two first lien term loans, a first lien delayed draw and a first lien revolver in Diligent Corporation and preferred equity in Diligent Preferred Issuer Inc. The Company's preferred equity investment is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of December 31, 2025, the Company's stated value of its equity investment, plus unpaid compounded dividends, was $15,827.
[29] Denotes investments in which the Company is an “Affiliated Person”, as defined in the Investment Company Act of 1940, as amended (the "1940 Act"), due to owning or holding the power to vote 5.0% or more of the outstanding voting securities of the investment but not controlling the company. Fair value as of September 30, 2026 and December 31, 2025, along with transactions during the nine months ended September 30, 2026 in which the issuer was a non-controlled/affiliated investment, is as follows:
Portfolio CompanyFair Value at December 31, 2025Gross Additions (A)Gross Redemptions (B)Net Change In Unrealized Appreciation (Depreciation)Fair Value at September 30, 2026Net Realized Gains (Losses)Interest IncomeDividend IncomeOther Income
Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) / Eagle Infrastructure Super HoldCo, LLC$18,337 $— $— $4,311 $22,648 $— $944 $1,423 $— 
Sierra Hamilton Holdings Corporation2,000 — — (111)1,889 — — — — 
TVG-Edmentum Holdings, LLC / Edmentum Ultimate Holdings, LLC40,365 4,804 — (14)45,155 — 3,789 1,019 188 
Total Non-Controlled/Affiliated Investments$60,702 $4,804 $— $4,186 $69,692 $— $4,733 $2,442 $188 
(A)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, payment-in-kind (“PIK”) interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
(B)Gross redemptions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[30] Denotes investments in which the Company is an “Affiliated Person”, as defined in the Investment Company Act of 1940, as amended (the "1940 Act"), due to owning or holding the power to vote 5.0% or more of the outstanding voting securities of the investment but not controlling the company. Fair value as of December 31, 2025 and December 31, 2024 along with transactions during the year ended December 31, 2025 in which the issuer was a non-controlled/affiliated investment is as follows:
Portfolio CompanyFair Value at December 31, 2024Gross
Additions (A)		Gross
Redemptions
(B)		Net Change In Unrealized Appreciation (Depreciation)Fair Value at December 31, 2025Net Realized Gains (Losses)Interest
Income		Dividend
Income		Other
Income
Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.) / Eagle Infrastructure Super HoldCo, LLC$19,156 $— $— $(819)$18,337 $— $1,321 $— $— 
Sierra Hamilton Holdings Corporation2,000 — — — 2,000 — — — — 
TVG-Edmentum Holdings, LLC / Edmentum Ultimate Holdings, LLC91,620 6,967 — (58,222)40,365 — 4,357 2,594 250 
Total Non-Controlled/Affiliated Investments$112,776 $6,967 $— $(59,041)$60,702 $— $5,678 $2,594 $250 
(A)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, payment-in-kind (“PIK”) interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
(B)Gross redemptions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[31] The Company holds preferred equity in Eclipse Topco, Inc. and a first lien term loan and a first lien revolver in Eclipse Buyer, Inc., a wholly-owned subsidiary of Eclipse Topco, Inc. The Company's preferred equity investment is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of September 30, 2026, the Company's stated value of its equity investment, plus unpaid compounded dividends, was $1,632.
[32] The Company holds preferred equity in Eclipse Topco, Inc. and a first lien term loan, a first lien revolver and a first lien delayed draw in Eclipse Buyer, Inc., a wholly-owned subsidiary of Eclipse Topco, Inc. The Company's preferred equity investment is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of December 31, 2025, the Company's stated value of its equity investment, plus unpaid compounded dividends, was $2,226.
[33] The Company holds Series C-2 preferred units and Class B-1 and Class B-2 of common equity in TVG-Edmentum Holdings, LLC and subordinated notes in Edmentum Ultimate Holdings, LLC, a wholly-owned subsidiary of TVG-Edmentum Holdings, LLC. As of September 30, 2026, the Company's stated value of its Series C-2 preferred shares, Class B-1 and Class B-2 common equity investments, plus unpaid compounded dividends, was $9,737, $48,080 and $29,707, respectively.
[34] The Company holds ordinary shares and Class B-1 and B-2 of preferred equity in TVG-Edmentum Holdings, LLC, and subordinated notes in Edmentum Ultimate Holdings, LLC, a wholly-owned subsidiary of TVG-Edmentum Holdings, LLC. As of December 31, 2025, the Company's stated value of the Company's Class B-1 and Class B-2 preferred equity investments, plus unpaid compounded dividends, was $48,080 and $29,707, respectively.
[35] The Company holds ordinary shares in FS WhiteWater Holdings, LLC, and a first lien term loan, a first lien revolver, and five first lien delayed draws in FS WhiteWater Borrower, LLC, a partially-owned subsidiary of FS WhiteWater Holdings, LLC.
[36] The Company holds ordinary shares in FS WhiteWater Holdings, LLC, and a first lien term loan, a first lien revolver, and five first lien delayed draws in FS WhiteWater Borrower, LLC, a partially-owned subsidiary of FS WhiteWater Holdings, LLC.
[37] The Company holds an LP Interest in Firebird Co-Invest L.P. and a first lien term loan, a first lien delayed draw and a first lien revolver in Firebird Acquisition Corp, Inc., a wholly-owned subsidiary of Firebird Co-Invest L.P.
[38] The Company holds an LP Interest in Firebird Co-Invest L.P. and holds a first lien term loan, a first lien delayed and a first lien revolver in Firebird Acquisition Corp, Inc., a wholly-owned subsidiary of Firebird Co-Invest L.P.
[39] The Company's common equity investment in HBWM Holdings, LLC is entitled to receive a cumulative return that is calculated using the unreturned original investment plus any unpaid compounded dividends. As of September 30, 2026, the Company's unreturned original investment, plus any unpaid compounded dividends, was $4,827.
[40] Investment is held by NMF HB, Inc.
[41] The Company's common equity investment in HBWM Holdings, LLC. is entitled to receive cumulative return that are calculated using the unreturned original investment plus any unpaid capitalized dividends. As of December 31, 2025, the Company's unreturned original investment, plus any unpaid compounded dividends, was $4,776.
[42] Investment is held by NMF HB, Inc.
[43] The Company holds Class A-1 common units in Jawbreaker Topco, L.P., and two first lien term loans, a first lien delayed draw term loan and a first lien revolver in Jawbreaker Parent, Inc., a wholly-owned subsidiary of Jawbreaker Topco, L.P.
[44] The Company's preferred equity investment in Knockout Intermediate Holdings I Inc. is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of September 30, 2026, the Company's stated value of its equity investment, plus unpaid compounded dividends, was $14,279.
[45] The Company's preferred equity investment in Knockout Intermediate Holdings I, Inc. is entitled to receive cumulative preferred dividends that are calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of December 31, 2025, the Company's stated value of its share, plus unpaid compounded dividends, was $13,323.
[46] The Company holds ordinary shares and warrants in NHME Holdings Corp., as well as a second lien Tranche A Term Loan in National HME, Inc., a wholly-owned subsidiary of NHME Holdings Corp. The second lien Tranche A Term Loan is entitled to receive 20% of the interest earned on the first lien Tranche A Term Loan, which accrues interest at a rate of SOFR + 5.00%, and 20% of the interest earned on the first lien Tranche B Term Loan, which accrues interest at a rate of SOFR + 6.00%.
[47] Denotes investments in which the Company “Controls”, as defined in the 1940 Act, due to owning or holding the power to vote more than 25.0% of the outstanding voting securities of the investment. Fair value as of December 31, 2025 and December 31, 2024 along with transactions during the year ended December 31, 2025 in which the issuer was a controlled investment, is as follows:
Portfolio CompanyFair Value at December 31, 2024Gross
Additions
(A)		Gross
Redemptions
(B)		Net Change In
Unrealized
Appreciation
(Depreciation)		Fair Value at December 31, 2025Net Realized Gains (Losses)Interest
Income		Dividend
Income		Other
Income
National HME, Inc./NHME Holdings Corp.$3,000 $— $— $(3,000)$— $— $— $— $— 
New Benevis Topco, LLC / New Benevis Holdco, Inc.140,102 21,456 — (7,094)154,464 — 14,309 — 1,383 
New Permian Holdco, Inc. / New Permian Holdco, L.L.C.63,076 7,657 — (6,900)63,833 — 5,759 — 500 
NM NL Holdings, L.P.104,512 — — 1,584 106,096 — — 8,740 — 
NM GP Holdco, LLC322 — — 68 390 — — 44 — 
NM YI LLC9,960 — — (1,319)8,641 — — 886 — 
NMFC Senior Loan Program III LLC160,000 — — — 160,000 — — 22,600 — 
NMFC Senior Loan Program IV LLC112,400 — — — 112,400 — — 15,315 — 
UniTek Global Services, Inc.107,524 72,385 (60,582)(46,146)73,181 38,898 516 10,851 1,070 
Total Controlled Investments$700,896 $101,498 $(60,582)$(62,807)$679,005 $38,898 $20,584 $58,436 $2,953 

(A)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
(B)Gross redemptions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[48] Investment is held by New Mountain Net Lease Corporation.
[49] Denotes investments in which the Company "controls", as defined in the 1940 Act, due to owning or holding the power to vote more than 25.0% of the outstanding voting securities of the investment. Fair value as of September 30, 2026 and December 31, 2025, along with transactions during the nine months ended September 30, 2026 in which the issuer was a controlled investment, is as follows:
Portfolio CompanyFair Value at December 31, 2025Gross Additions (A)Gross Redemptions (B)Net Change In Unrealized Appreciation (Depreciation)Fair Value at September 30, 2026Net Realized Gains (Losses)Interest IncomeDividend IncomeOther Income
National HME, Inc./NHME Holdings Corp.$— $— $(12,872)$12,872 $— $(12,872)$— $— $— 
New Benevis Topco, LLC / New Benevis Holdco, Inc.154,464 8,931 (76,831)5,185 91,749 (5,718)6,855 — — 
New Permian Holdco, Inc. / New Permian Holdco, L.L.C.63,833 4,561 — (1,000)67,394 — 4,563 — 375 
NM NL Holdings, L.P.106,096 5,926 (6,972)6,909 111,959 (3)— 6,601 185 
NM GP Holdco, LLC390 75 (64)5 406 — — 33 — 
NM YI, LLC8,641 — — 143 8,784 — — 697 — 
NMFC Senior Loan Program III LLC160,000 — — (4,800)155,200 — — 14,260 — 
NMFC Senior Loan Program IV LLC112,400 — — (10,116)102,284 — — 9,695 — 
UniTek Global Services, Inc.73,181 10,164 — 9,739 93,084 — — 10,164 750 
Total Controlled Investments$679,005 $29,657 $(96,739)$18,937 $630,860 $(18,593)$11,418 $41,450 $1,310 
(A)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest or dividends, the amortization of discounts, reorganizations or restructurings and the movement of an existing portfolio company into this category from a different category.
(B)Gross redemptions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, reorganizations or restructurings and the movement of an existing portfolio company out of this category into a different category.
[50] Investment is held by New Mountain Net Lease Corporation.
[51] Investment is denominated in foreign currency and is translated into U.S. dollars as of the valuation date. As of December 31, 2025, the par value U.S. dollar equivalent of the Viper Bidco, Inc. first lien term loans is $16,051 and the Nelipak Holding Company first lien term loan, undrawn delayed draw term loan, undrawn revolver and drawn revolver is $19,212, $7,529, $1,282 and $123, respectively. See Note 2. Summary of Significant Accounting Policies, for details.
[52] Investment is denominated in foreign currency and is translated into U.S. dollars as of the valuation date. As of September 30, 2026, the par value U.S. dollar equivalent of the Viper Bidco, Inc. first lien term loan is $15,686 and the Nelipak Holding Company first lien term loan, undrawn delayed draw term loan and undrawn revolver are $18,398, $7,264 and $1,355, respectively. See Note 2. Summary of Significant Accounting Policies, for details.
[53] The Company holds common stock in Notorious Buyer, LLC, and a first lien term loan, a subordinated loan, and a first lien revolver in Notorious Topco, LLC and Notorious Holdings, LLC, two wholly-owned subsidiaries of Notorious Buyer, LLC.
[54] The Company holds common units in Notorious Buyer, LLC, and a first lien term loan, a subordinated loan, and a first lien revolver in Notorious Topco, LLC and Notorious Holdings, LLC, two wholly-owned subsidiaries of Notorious Buyer, LLC.
[55] The Company holds one claim related to a collateralized agreement to resell on its Consolidated Statements of Assets and Liabilities with a cost basis of $30,000 and a fair value of $5,700 as of September 30, 2026. See Note 2. Summary of Significant Accounting Policies, for details.
[56] Investment is on non-accrual status as of December 31, 2025. See Note 3. Investments, for details.
[57] The Company holds one security purchased under a collateralized agreement to resell on its Consolidated Statement of Assets and Liabilities with a cost basis of $30,000 and a fair value of $13,500 as of December 31, 2025. See Note 2. Summary of Significant Accounting Policies, for details.
[58] Investment is held by NMF Permian Holdings, LLC.
[59] Investment is held by NMF Permian Holdings, LLC.
[60] Investment is held by NMF Pioneer, Inc.
[61] Investment is held by NMF Pioneer, Inc.
[62] The Company holds Class A-1 Common Units in Ambrosia Holdco Corp. and two first lien term loans, two subordinated loans and a first lien delayed draw in TMK Hawk Parent, Corp. TMK Hawk Parent, Corp. is a wholly-owned subsidiary of Ambrosia Intermediate Holdco Corp., which is a wholly-owned subsidiary of Ambrosia Holdco Corp
[63] The Company holds Class A-1 Common Units in Ambrosia Topco LLC and two first lien term loans, a subordinated loan and a first lien delayed draw in TMK Hawk Parent, Corp., a wholly-owned subsidiary of Ambrosia Topco LLC.