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Investments - Narrative (Details)
€ in Thousands, £ in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2025
USD ($)
Mar. 31, 2025
EUR (€)
 [2],[3],[5]
Mar. 31, 2025
GBP (£)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
EUR (€)
 [6],[7],[10],[15],[45]
Dec. 31, 2024
GBP (£)
Sep. 30, 2023
USD ($)
Sep. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
May 03, 2013
USD ($)
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost $ 3,092,943     $ 3,101,924            
Investments at fair value 3,034,211     3,091,024            
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3],[4] 4,657                  
Investments at fair value [1],[2],[3],[4] 4,698                  
Principal amount [1],[2],[3],[4],[5] 4,698                  
Investment, Identifier [Axis]: AAC Lender Holdings, LLC, Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3]     0 [6],[7]            
Investments at fair value 0 [2],[3]     0 [6],[7]            
Investment, Identifier [Axis]: AAH Topco, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (37) [2],[3],[8]     (37) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,659 [2],[3],[5],[8]     3,659 [6],[7],[9],[10]            
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 22,537 [2],[11],[12]     22,583 [6],[13],[14]            
Investments at fair value 22,675 [2],[11],[12]     22,734 [6],[13],[14]            
Principal amount 22,675 [2],[5],[11],[12]     22,733 [6],[10],[13],[14]            
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 20,061 [1],[2],[3]     20,104 [6],[7],[15]            
Investments at fair value 20,165 [1],[2],[3]     20,218 [6],[7],[15]            
Principal amount 20,165 [1],[2],[3],[5]     20,218 [6],[7],[10],[15]            
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 9,524 [2],[16]     9,545 [6],[17]            
Investments at fair value 9,575 [2],[16]     9,599 [6],[17]            
Principal amount 9,575 [2],[5],[16]     9,599 [6],[10],[17]            
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 4                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,312 [2],[16]     7,327 [6],[17]            
Investments at fair value 7,357 [2],[16]     7,375 [6],[17]            
Principal amount 7,357 [2],[5],[16]     7,375 [6],[10],[17]            
Investment, Identifier [Axis]: AAH Topco, LLC, Subordinated 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 16,053 [1],[2],[3]     15,598 [6],[7],[15]            
Investments at fair value 15,916 [1],[2],[3]     15,366 [6],[7],[15]            
Principal amount 16,185 [1],[2],[3],[5]     15,733 [6],[7],[10],[15]            
Investment, Identifier [Axis]: AAH Topco, LLC, Subordinated 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,296 [2],[16]     6,117 [6],[17]            
Investments at fair value 6,242 [2],[16]     6,027 [6],[17]            
Principal amount 6,347 [2],[5],[16]     6,170 [6],[10],[17]            
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 280 [2],[3],[8]     233 [6],[7],[9]            
Investments at fair value 272 [2],[3],[8]     228 [6],[7],[9]            
Principal amount 282 [2],[3],[5],[8]     235 [6],[7],[9],[10]            
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (21) [2],[3],[8],[18]     (21) [6],[7],[9],[19]            
Investments at fair value (74) [2],[3],[8],[18]     (62) [6],[7],[9],[19]            
Principal amount 2,071 [2],[3],[5],[8],[18]     2,118 [6],[7],[9],[10],[19],[20]            
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 21,968 [2],[11],[12]     21,782 [6],[13],[14]            
Investments at fair value 21,300 [2],[11],[12]     21,266 [6],[13],[14]            
Principal amount 22,089 [2],[5],[11],[12]     21,910 [6],[10],[13],[14]            
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,206 [1],[2],[3]     4,170 [6],[7],[15]            
Investments at fair value 4,089 [1],[2],[3]     4,082 [6],[7],[15]            
Principal amount 4,240 [1],[2],[3],[5]     4,206 [6],[7],[10],[15]            
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,890 [1],[2],[3]     3,858 [6],[7],[15]            
Investments at fair value 3,776 [1],[2],[3]     3,769 [6],[7],[15]            
Principal amount 3,915 [1],[2],[3],[5]     3,884 [6],[7],[10],[15]            
Investment, Identifier [Axis]: ACI Parent Inc., Preferred shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 18,982 [2],[3],[18]     18,444 [6],[7],[19]            
Investments at fair value 16,872 [2],[3],[18]     16,419 [6],[7],[19]            
Investment, Identifier [Axis]: AI Altius US Bidco, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,049 [1],[2],[3]     3,048 [6],[7],[15]            
Investments at fair value 3,062 [1],[2],[3]     3,062 [6],[7],[15]            
Principal amount 3,062 [1],[2],[3],[5]     3,062 [6],[7],[10],[15]            
Investment, Identifier [Axis]: AI Altius US Bidco, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,077 [2],[3],[5],[8]     3,077 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[15],[21]       4,656            
Investments at fair value [6],[7],[15],[21]       4,698            
Principal amount [6],[7],[10],[15],[21]       4,698            
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       0            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       1,048            
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 0                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 1,048                  
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (7) [2],[3],[8]     (7) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 667 [2],[3],[5],[8]     667 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Alegeus Technologies Holdings Corp., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 8,378 [1],[2],[3]     8,406 [6],[7],[15]            
Investments at fair value 8,372 [1],[2],[3]     8,404 [6],[7],[15]            
Principal amount 8,478 [1],[2],[3],[5]     8,510 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Ambrosia Holdco Corp., Ordinary shares 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,348 [2],[12]     1,348 [6],[14]            
Investments at fair value 1,291 [2],[12]     1,348 [6],[14]            
Investment, Identifier [Axis]: Ambrosia Holdco Corp., Ordinary shares 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,300 [2],[3]     1,300 [6],[7]            
Investments at fair value 1,245 [2],[3]     1,300 [6],[7]            
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (10)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       1,969            
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (10)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 1,969                  
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 18,863 [1],[2],[3]     18,908 [6],[13],[14]            
Investments at fair value 18,915 [1],[2],[3]     18,964 [6],[13],[14]            
Principal amount 18,915 [1],[2],[3],[5]     18,964 [6],[10],[13],[14]            
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 5,247 [2],[11],[12]     5,259 [6],[13],[14]            
Investments at fair value 5,264 [2],[11],[12]     5,277 [6],[13],[14]            
Principal amount 5,264 [2],[5],[11],[12]     5,277 [6],[10],[13],[14]            
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 689 [1],[2],[3]     690 [6],[7],[15]            
Investments at fair value 691 [1],[2],[3]     693 [6],[7],[15]            
Principal amount 691 [1],[2],[3],[5]     693 [6],[7],[10],[15]            
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]                    
Cost [6],[7],[9],[22]       0            
Investments at fair value [6],[7],[9],[22]       0            
Principal amount [6],[7],[9],[10],[22]       2,652            
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 0                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 2,652                  
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 29,842 [2],[12],[23]     29,843 [6],[14]            
Investments at fair value 17,999 [2],[12],[23]     17,999 [6],[14]            
Principal amount 29,879 [2],[5],[12],[23]     29,879 [6],[10],[14]            
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,527 [2],[3],[23]     1,527 [6],[7]            
Investments at fair value 0 [2],[3],[23]     0 [6],[7]            
Principal amount 1,527 [2],[3],[5],[23]     1,527 [6],[7],[10]            
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.), Non-accrual status                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 31,369                  
Investments at fair value 17,999                  
Unearned interest income 1,293                  
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), Subordinated                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[23]     0 [6],[7]            
Investments at fair value 0 [2],[3],[23]     0 [6],[7]            
Principal amount 5,230 [2],[3],[5],[23]     5,230 [6],[7],[10]            
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]                    
Cost 10,525 [1],[2],[3]     10,548 [6],[7],[15]            
Investments at fair value 10,592 [1],[2],[3]     10,618 [6],[7],[15]            
Principal amount 10,592 [1],[2],[3],[5]     10,618 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Ancora Acquisition LLC, Preferred shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 83 [2],[24]     83 [6],[25]            
Investments at fair value 0 [2],[24]     0 [6],[25]            
Investment, Identifier [Axis]: Associations, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 49,285 [1],[2],[3]     49,409 [6],[7],[15]            
Investments at fair value 49,799 [1],[2],[3]     49,430 [6],[7],[15]            
Principal amount 49,306 [1],[2],[3],[5]     49,430 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Associations, Inc., First lien - Drawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 954 [2],[3],[8]     641 [6],[7],[9]            
Investments at fair value 962 [2],[3],[8]     641 [6],[7],[9]            
Principal amount 953 [2],[3],[5],[8]     641 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Associations, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (2)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       3,200            
Investment, Identifier [Axis]: Associations, Inc., First lien - Drawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,276 [2],[3],[8]     1,538 [6],[7],[9]            
Investments at fair value 2,277 [2],[3],[8]     1,539 [6],[7],[9]            
Principal amount 2,277 [2],[3],[5],[8]     1,539 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Associations, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (1) [2],[3]     (1) [6],[7],[9]            
Investments at fair value 29 [2],[3]     0 [6],[7],[9]            
Principal amount 2,884 [2],[3],[5]     1,539 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Associations, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3] 0                  
Investments at fair value [2],[3] 0                  
Principal amount [2],[3],[5] 800                  
Investment, Identifier [Axis]: Associations, Inc., Subordinated 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 8,226 [2],[3]     7,942 [6],[7]            
Investments at fair value 8,366 [2],[3]     7,959 [6],[7]            
Principal amount 8,243 [2],[3],[5]     7,959 [6],[7],[10]            
Investment, Identifier [Axis]: Associations, Inc., Subordinated 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,141 [2],[3]     3,033 [6],[7]            
Investments at fair value 3,195 [2],[3]     3,039 [6],[7]            
Principal amount 3,148 [2],[3],[5]     3,039 [6],[7],[10]            
Investment, Identifier [Axis]: Aston FinCo S.a r.l. / Aston US Finco, LLC, Second lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 34,345 [1],[2],[3]     34,335 [6],[7],[15],[21]            
Investments at fair value 34,459 [1],[2],[3]     34,459 [6],[7],[15],[21]            
Principal amount 34,459 [1],[2],[3],[5]     34,459 [6],[7],[10],[15],[21]            
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9],[21]       (5)            
Investments at fair value [6],[7],[9],[21]       0            
Principal amount [6],[7],[9],[10],[20],[21]       320            
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[4],[8] (5)                  
Investments at fair value [2],[3],[4],[8] 0                  
Principal amount [2],[3],[4],[5],[8] 320                  
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,398 [1],[2],[3]     3,405 [6],[7],[15]            
Investments at fair value 3,437 [1],[2],[3]     3,445 [6],[7],[15]            
Principal amount 3,437 [1],[2],[3],[5]     3,445 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,327 [1],[2],[3]     1,330 [6],[7],[15]            
Investments at fair value 1,338 [1],[2],[3]     1,342 [6],[7],[15]            
Principal amount 1,338 [1],[2],[3],[5]     1,342 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Auctane Inc. (fka Stamps.com Inc.) First Lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3] 35,945                  
Investments at fair value [1],[2],[3] 35,446                  
Principal amount [1],[2],[3],[5] 36,155                  
Investment, Identifier [Axis]: Auctane Inc. (fka Stamps.com Inc.), First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[15]       21,492            
Investments at fair value [6],[7],[15]       21,138            
Principal amount [6],[7],[10],[15]       21,624            
Investment, Identifier [Axis]: Auctane Inc. (fka Stamps.com Inc.), First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[13],[14]       14,534            
Investments at fair value [6],[13],[14]       14,295            
Principal amount [6],[10],[13],[14]       14,624            
Investment, Identifier [Axis]: Avalara, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[15]       17,045            
Investments at fair value [6],[7],[15]       17,198            
Principal amount [6],[7],[10],[15]       17,198            
Investment, Identifier [Axis]: Avalara, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (21)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       1,720            
Investment, Identifier [Axis]: Bach Special Limited (Bach Preference Limited), Preferred shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [7],[15],[21]       13,788            
Investments at fair value [7],[15],[21]       13,867            
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 13,559 [1],[2],[3]     13,591 [6],[7],[15]            
Investments at fair value 13,550 [1],[2],[3]     13,585 [6],[7],[15]            
Principal amount 13,652 [1],[2],[3],[5]     13,687 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value (15) [2],[3],[8]     (15) [6],[7],[9]            
Principal amount 2,065 [2],[3],[5],[8]     2,065 [6],[7],[9],[10],[20]            
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (22) [2],[3],[8]     (22) [6],[7],[9]            
Investments at fair value (22) [2],[3],[8]     (22) [6],[7],[9]            
Principal amount 2,894 [2],[3],[5],[8]     2,894 [6],[7],[9],[10],[20]            
Investment, Identifier [Axis]: Bamboo Health Holdings, LLC (f/k/a Appriss Health, LLC), First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,061 [1],[2],[3]     6,081 [6],[7],[15],[26]            
Investments at fair value 6,086 [1],[2],[3]     6,109 [6],[7],[15],[26]            
Principal amount 6,086 [1],[2],[3],[5]     6,109 [6],[7],[10],[15],[26]            
Investment, Identifier [Axis]: Bamboo Health Holdings, LLC (f/k/a Appriss Health, LLC), First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (4) [2],[3],[8]     (4) [6],[7],[9],[26]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9],[26]            
Principal amount 417 [2],[3],[5],[8]     417 [6],[7],[9],[10],[26]            
Investment, Identifier [Axis]: Bamboo Health Intermediate Holdings (fka Appriss Health Intermediate Holdings, Inc.), Preferred shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[26]       3,432            
Investments at fair value [6],[7],[26]       3,371            
Investment, Identifier [Axis]: Beacon Pointe Harmony, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 462                  
Investments at fair value [2],[3],[8] 466                  
Principal amount [2],[3],[5],[8] 466                  
Investment, Identifier [Axis]: Beacon Pointe Harmony, LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       464            
Investments at fair value [6],[7],[9]       467            
Principal amount [6],[7],[9],[10]       467            
Investment, Identifier [Axis]: Beacon Pointe Harmony, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,685 [2],[3],[5],[8]     1,685 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Bonterra LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[3] 15,027                  
Investments at fair value [1],[3] 15,027                  
Principal amount [1],[3],[5] 15,065                  
Investment, Identifier [Axis]: Bonterra LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [3],[8] 265                  
Investments at fair value [3],[8] 265                  
Principal amount [3],[5],[8] 266                  
Investment, Identifier [Axis]: Bonterra LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [3],[8] 0                  
Investments at fair value [3],[8] 0                  
Principal amount [3],[5],[8] 1,629                  
Investment, Identifier [Axis]: Bonterra LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [3],[8] (3)                  
Investments at fair value [3],[8] (3)                  
Principal amount [3],[5],[8] 1,363                  
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Drawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,315 [2],[8],[27]     1,318 [6],[9],[28]            
Investments at fair value 1,316 [2],[8],[27]     1,319 [6],[9],[28]            
Principal amount 1,316 [2],[5],[8],[27]     1,319 [6],[9],[10],[28]            
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Drawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 518 [2],[3],[8]     520 [6],[7],[9]            
Investments at fair value 515 [2],[3],[8]     516 [6],[7],[9]            
Principal amount 515 [2],[3],[5],[8]     516 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 376 [2],[3],[5],[8]     376 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (6) [2],[3],[8]     (6) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,594 [2],[3],[5],[8]     1,594 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (7) [2],[8],[27]     (7) [6],[9],[28]            
Investments at fair value 0 [2],[8],[27]     0 [6],[9],[28]            
Principal amount 963 [2],[5],[8],[27]     963 [6],[9],[10],[28]            
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 19,883 [2],[27]     19,931 [6],[28]            
Investments at fair value 19,969 [2],[27]     20,019 [6],[28]            
Principal amount 19,969 [2],[5],[27]     20,019 [6],[10],[28]            
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,808 [2],[11],[12]     7,827 [6],[13],[14]            
Investments at fair value 7,808 [2],[11],[12]     7,827 [6],[13],[14]            
Principal amount 7,808 [2],[5],[11],[12]     7,827 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (4)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       935            
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       417            
Investments at fair value [6],[7],[9]       417            
Principal amount [6],[7],[9],[10]       417            
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,847 [2],[3],[5],[8]     1,847 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (4)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 935                  
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 13,172 [2],[11],[12]     13,170 [6],[13],[14]            
Investments at fair value 13,206 [2],[11],[12]     13,206 [6],[13],[14]            
Principal amount 13,206 [2],[5],[11],[12]     13,206 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 8,893 [1],[2],[3]     8,452 [6],[7],[15]            
Investments at fair value 8,879 [1],[2],[3]     8,462 [6],[7],[15]            
Principal amount 8,879 [1],[2],[3],[5]     8,462 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,394 [2],[11],[12]     3,394 [6],[13],[14]            
Investments at fair value 3,398 [2],[11],[12]     3,398 [6],[13],[14]            
Principal amount 3,398 [2],[5],[11],[12]     3,398 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 4                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 759 [2],[11],[12]     758 [6],[13],[14]            
Investments at fair value 761 [2],[11],[12]     761 [6],[13],[14]            
Principal amount 761 [2],[5],[11],[12]     761 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 5                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 340 [2],[11],[12]     340 [6],[13],[14]            
Investments at fair value 341 [2],[11],[12]     341 [6],[13],[14]            
Principal amount 341 [2],[5],[11],[12]     341 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 6                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 271 [2],[11],[12]     271 [6],[13],[14]            
Investments at fair value 272 [2],[11],[12]     272 [6],[13],[14]            
Principal amount 272 [2],[5],[11],[12]     272 [6],[10],[13],[14]            
Investment, Identifier [Axis]: CB Buyer, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[13],[14]       3,293            
Investments at fair value [6],[13],[14]       3,292            
Principal amount [6],[10],[13],[14]       3,308            
Investment, Identifier [Axis]: CB Buyer, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (2)            
Investments at fair value [6],[7],[9]       (2)            
Principal amount [6],[7],[9],[10]       364            
Investment, Identifier [Axis]: CB Buyer, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       0            
Investments at fair value [6],[7],[9]       (5)            
Principal amount [6],[7],[9],[10]       934            
Investment, Identifier [Axis]: CFS Management, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 11,918 [1],[2],[3]     11,880 [6],[13],[14]            
Investments at fair value 10,429 [1],[2],[3]     10,693 [6],[13],[14]            
Principal amount 11,918 [1],[2],[3],[5]     11,881 [6],[10],[13],[14]            
Investment, Identifier [Axis]: CFS Management, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,559 [2],[11],[12]     3,548 [6],[13],[14]            
Investments at fair value 3,107 [2],[11],[12]     3,185 [6],[13],[14]            
Principal amount 3,551 [2],[5],[11],[12]     3,539 [6],[10],[13],[14]            
Investment, Identifier [Axis]: CG Group Holdings, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 8,472 [2],[11],[12]     8,447 [6],[13],[14]            
Investments at fair value 8,514 [2],[11],[12]     8,449 [6],[13],[14]            
Principal amount 8,514 [2],[5],[11],[12]     8,493 [6],[10],[13],[14]            
Investment, Identifier [Axis]: CG Group Holdings, LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,061 [1],[2],[3],[8]     945 [6],[7],[9],[15]            
Investments at fair value 1,073 [1],[2],[3],[8]     950 [6],[7],[9],[15]            
Principal amount 1,073 [1],[2],[3],[5],[8]     954 [6],[7],[9],[10],[15]            
Investment, Identifier [Axis]: CG Group Holdings, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (1) [2],[3],[8]     (3) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     (1) [6],[7],[9]            
Principal amount 113 [2],[3],[5],[8]     226 [6],[7],[9],[10]            
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,469 [2],[11],[12]     6,484 [6],[13],[14]            
Investments at fair value 6,467 [2],[11],[12]     6,483 [6],[13],[14]            
Principal amount 6,500 [2],[5],[11],[12]     6,516 [6],[10],[13],[14]            
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 562 [1],[2],[3],[8]     486 [6],[7],[9],[15]            
Investments at fair value 562 [1],[2],[3],[8]     486 [6],[7],[9],[15]            
Principal amount 565 [1],[2],[3],[5],[8]     489 [6],[7],[9],[10],[15]            
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (3) [2],[3],[8]     (3) [6],[7],[9]            
Investments at fair value (3) [2],[3],[8]     (3) [6],[7],[9]            
Principal amount 521 [2],[3],[5],[8]     597 [6],[7],[9],[10]            
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value (8) [2],[3],[8]     (8) [6],[7],[9]            
Principal amount 1,629 [2],[3],[5],[8]     1,629 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Calabrio, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (6)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       850            
Investment, Identifier [Axis]: Calabrio, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 633 [2],[3],[8]     633 [6],[7],[9]            
Investments at fair value 637 [2],[3],[8]     637 [6],[7],[9]            
Principal amount 637 [2],[3],[5],[8]     637 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Calabrio, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (6)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 850                  
Investment, Identifier [Axis]: Calabrio, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 12,217 [2],[27]     12,244 [6],[28]            
Investments at fair value 12,255 [2],[27]     12,286 [6],[28]            
Principal amount 12,255 [2],[5],[27]     12,286 [6],[10],[28]            
Investment, Identifier [Axis]: Calabrio, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,559 [2],[27]     1,562 [6],[28]            
Investments at fair value 1,570 [2],[27]     1,574 [6],[28]            
Principal amount 1,570 [2],[5],[27]     1,574 [6],[10],[28]            
Investment, Identifier [Axis]: Cardinal Parent, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 11,661 [16]     11,689 [17]            
Investments at fair value 11,433 [16]     11,249 [17]            
Principal amount 11,700 [5],[16]     11,730 [10],[17]            
Investment, Identifier [Axis]: Cardinal Parent, Inc., Second lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 9,712 [2],[16]     9,709 [6],[17]            
Investments at fair value 9,655 [2],[16]     9,423 [6],[17]            
Principal amount 9,767 [2],[5],[16]     9,767 [6],[10],[17]            
Investment, Identifier [Axis]: CentralSquare Technologies, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[13],[14]       35,399            
Investments at fair value [6],[13],[14]       35,797            
Principal amount [6],[10],[13],[14]       35,797            
Investment, Identifier [Axis]: CentralSquare Technologies, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (50) [2],[3],[8]     (50) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,980 [2],[3],[5],[8]     3,980 [6],[7],[9],[10]            
Investment, Identifier [Axis]: CentralSquare Technologies, LLC, Second Lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[11],[12] 35,640                  
Investments at fair value [2],[11],[12] 36,023                  
Principal amount [2],[5],[11],[12] 36,023                  
Investment, Identifier [Axis]: Ciklum Inc, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (37)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 2,989                  
Investment, Identifier [Axis]: Ciklum Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 9,410 [2],[4],[11],[12]     9,430 [6],[13],[14],[21]            
Investments at fair value 9,512 [2],[4],[11],[12]     9,536 [6],[13],[14],[21]            
Principal amount 9,512 [2],[4],[5],[11],[12]     9,536 [6],[10],[13],[14],[21]            
Investment, Identifier [Axis]: Ciklum Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 11,955 [2],[3],[5],[8]     11,955 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Ciklum Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (37)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       2,989            
Investment, Identifier [Axis]: CommerceHub, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,621 [1],[2],[3]     3,608 [6],[7],[15]            
Investments at fair value 3,910 [1],[2],[3]     3,920 [6],[7],[15]            
Principal amount 3,910 [1],[2],[3],[5]     3,920 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Compsych Investments Corp, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[11],[12] 1,159                  
Investments at fair value [2],[11],[12] 1,159                  
Principal amount [2],[5],[11],[12] 1,162                  
Investment, Identifier [Axis]: Compsych Investments Corp., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[13],[14]       1,162            
Investments at fair value [6],[13],[14]       1,162            
Principal amount [6],[10],[13],[14]       1,164            
Investment, Identifier [Axis]: Compsych Investments Corp., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value (1) [2],[3],[8]     (1) [6],[7],[9]            
Principal amount 333 [2],[3],[5],[8]     333 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Convey Health Solutions, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 13,195 [1],[2],[3]     13,101 [6],[7],[15]            
Investments at fair value 12,180 [1],[2],[3]     11,935 [6],[7],[15]            
Principal amount 13,243 [1],[2],[3],[5]     13,152 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Convey Health Solutions, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,196 [1],[2],[3]     2,180 [6],[7],[15]            
Investments at fair value 2,034 [1],[2],[3]     1,993 [6],[7],[15]            
Principal amount 2,211 [1],[2],[3],[5]     2,196 [6],[7],[10],[15]            
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[15]       1,045            
Investments at fair value [6],[7],[15]       1,050            
Principal amount [6],[7],[10],[15]       1,050            
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3] 1,042                  
Investments at fair value [1],[2],[3] 1,047                  
Principal amount [1],[2],[3],[5] 1,047                  
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (3)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       578            
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (3)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 578                  
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 14,212 [1],[2],[3]     14,243 [6],[7],[15]            
Investments at fair value 14,352 [1],[2],[3]     14,388 [6],[7],[15]            
Principal amount 14,352 [1],[2],[3],[5]     14,388 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,291 [2],[3],[5],[8]     1,291 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (12) [2],[3],[8]     (12) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 989 [2],[3],[5],[8]     989 [6],[7],[9],[10]            
Investment, Identifier [Axis]: DCA Investment Holding, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,794 [2],[11],[12]     1,798 [6],[13],[14]            
Investments at fair value 1,761 [2],[11],[12]     1,758 [6],[13],[14]            
Principal amount 1,799 [2],[5],[11],[12]     1,804 [6],[10],[13],[14]            
Investment, Identifier [Axis]: DCA Investment Holding, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 998 [1],[2],[3]     1,000 [6],[7],[15]            
Investments at fair value 988 [1],[2],[3]     987 [6],[7],[15]            
Principal amount 1,008 [1],[2],[3],[5]     1,011 [6],[7],[10],[15]            
Investment, Identifier [Axis]: DG Investment Intermediate Holdings 2, Inc., Second lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 20,280 [1],[3]     20,280 [7],[15]            
Investments at fair value 20,034 [1],[3]     20,281 [7],[15]            
Principal amount 20,313 [1],[3],[5]     20,313 [7],[10],[15]            
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien (3)(13)(16) - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 481                  
Investments at fair value [2],[3],[8] 479                  
Principal amount [2],[3],[5],[8] 481                  
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value (8) [2],[3],[8]     (13) [6],[7],[9]            
Principal amount 1,924 [2],[3],[5],[8]     2,405 [6],[7],[9],[10]            
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 18,290 [1],[2],[3]     18,337 [6],[7],[15]            
Investments at fair value 18,213 [1],[2],[3]     18,236 [6],[7],[15]            
Principal amount 18,290 [1],[2],[3],[5]     18,337 [6],[7],[10],[15]            
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,849 [2],[16]     6,867 [6],[17]            
Investments at fair value 6,821 [2],[16]     6,829 [6],[17]            
Principal amount 6,849 [2],[5],[16]     6,867 [6],[10],[17]            
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3] 3,355                  
Investments at fair value [1],[2],[3] 3,366                  
Principal amount [1],[2],[3],[5] 3,380                  
Investment, Identifier [Axis]: DOXA Insurance Holdings LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,046 [2],[3],[5],[8]     3,046 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8]     (10) [6],[7],[9]            
Investments at fair value [2],[3],[8]     0 [6],[7],[9]            
Principal amount [2],[3],[5],[8]     986 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 12,771 [1],[2],[3]     12,799 [6],[7],[15]            
Investments at fair value 12,845 [1],[2],[3]     12,878 [6],[7],[15]            
Principal amount 12,845 [1],[2],[3],[5]     12,878 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,076 [2],[11],[12]     1,078 [6],[13],[14]            
Investments at fair value 1,082 [2],[11],[12]     1,085 [6],[13],[14]            
Principal amount 1,082 [2],[5],[11],[12]     1,085 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 64 [2],[3]     64 [6],[7]            
Investments at fair value 65 [2],[3]     65 [6],[7]            
Principal amount 65 [2],[3],[5]     65 [6],[7],[10]            
Investment, Identifier [Axis]: Daxko Acquisition Corporation., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (10)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 986                  
Investment, Identifier [Axis]: Dealer Tire Holdings, LLC, Preferred shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 75,928 [1],[2],[3]     75,927 [6],[7],[15]            
Investments at fair value 78,578 [1],[2],[3]     79,222 [6],[7],[15]            
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,997 [1],[2],[3],[8]     2,997 [6],[7],[9],[15]            
Investments at fair value 3,000 [1],[2],[3],[8]     2,987 [6],[7],[9],[15]            
Principal amount 3,027 [1],[2],[3],[5],[8]     3,027 [6],[7],[9],[10],[15]            
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 36,788 [2],[11],[12]     36,871 [6],[13],[14]            
Investments at fair value 36,672 [2],[11],[12]     36,604 [6],[13],[14]            
Principal amount 36,998 [2],[5],[11],[12]     37,094 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,872 [1],[2],[3]     3,880 [6],[7],[15]            
Investments at fair value 3,860 [1],[2],[3]     3,853 [6],[7],[15]            
Principal amount 3,894 [1],[2],[3],[5]     3,905 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Diligent Corporation , First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[11],[12] 19,755                  
Investments at fair value [2],[11],[12] 19,821                  
Principal amount [2],[5],[11],[12] 19,821                  
Investment, Identifier [Axis]: Diligent Corporation , First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3] 3,387                  
Investments at fair value [1],[2],[3] 3,398                  
Principal amount [1],[2],[3],[5] 3,398                  
Investment, Identifier [Axis]: Diligent Corporation, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (8) [2],[3],[8]     (8) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 2,265 [2],[3],[5],[8]     2,265 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Diligent Corporation, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (13) [2],[3],[8]     (13) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,398 [2],[3],[5],[8]     3,398 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Diligent Corporation, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[13],[14]       19,753            
Investments at fair value [6],[13],[14]       19,821            
Principal amount [6],[10],[13],[14]       19,821            
Investment, Identifier [Axis]: Diligent Corporation, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[15]       3,386            
Investments at fair value [6],[7],[15]       3,398            
Principal amount [6],[7],[10],[15]       3,398            
Investment, Identifier [Axis]: Diligent Preferred Issuer, Inc., Preferred shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 14,912 [2],[3],[29]     14,162 [6],[7],[30]            
Investments at fair value 14,364 [2],[3],[29]     13,609 [6],[7],[30]            
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.), First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 10,628 [2],[11],[12]     10,628 [6],[13],[14]            
Investments at fair value 10,628 [2],[11],[12]     10,628 [6],[13],[14]            
Principal amount 10,628 [2],[5],[11],[12]     10,628 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.), First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 340 [2],[3]     340 [6],[7]            
Investments at fair value 340 [2],[3]     340 [6],[7]            
Principal amount 340 [2],[3],[5]     340 [6],[7],[10]            
Investment, Identifier [Axis]: Eagle Infrastructure Super HoldCo, LLC, Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,104 [2],[3]     4,104 [6],[7]            
Investments at fair value 7,369 [2],[3]     8,188 [6],[7]            
Investment, Identifier [Axis]: Eclipse Buyer Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,079 [2],[16],[31]     7,078 [6],[17],[32]            
Investments at fair value 7,078 [2],[16],[31]     7,078 [6],[17],[32]            
Principal amount 7,113 [2],[5],[16],[31]     7,113 [6],[10],[17],[32]            
Investment, Identifier [Axis]: Eclipse Buyer Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[8],[16]     0 [6],[9],[17]            
Investments at fair value (6) [2],[8],[16]     (6) [6],[9],[17]            
Principal amount 1,206 [2],[5],[8],[16]     1,206 [6],[9],[10],[17]            
Investment, Identifier [Axis]: Eclipse Buyer Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (21) [2],[3],[8]     (21) [6],[7],[9]            
Investments at fair value (21) [2],[3],[8]     (21) [6],[7],[9]            
Principal amount 4,190 [2],[3],[5],[8]     4,190 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 145 [2],[3]     145 [6],[7]            
Investments at fair value 305 [2],[3]     305 [6],[7]            
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Preferred shares 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,900 [2],[3]     2,900 [6],[7]            
Investments at fair value 2,900 [2],[3]     2,900 [6],[7]            
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Preferred shares 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,565 [2],[3]     2,565 [6],[7]            
Investments at fair value 2,702 [2],[3]     2,702 [6],[7]            
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc., Junior preferred shares, Non-accrual status                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,565                  
Investments at fair value 2,702                  
Unearned income 106                  
Investment, Identifier [Axis]: Eclipse Topco, Inc., Preferred shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,952 [2],[16],[31]     1,952 [6],[17],[32]            
Investments at fair value 1,952 [2],[16],[31]     1,952 [6],[17],[32]            
Investment, Identifier [Axis]: Edmentum Ultimate Holdings, LLC, Subordinated                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 23,214 [2],[3],[33]     22,223 [6],[7]            
Investments at fair value 23,277 [2],[3],[33]     22,290 [6],[7]            
Principal amount 23,277 [2],[3],[5],[33]     22,290 [6],[7],[10]            
Investment, Identifier [Axis]: Einstein Parent, Inc., First Lien - Drawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3] 55,039                  
Investments at fair value [1],[2],[3] 55,026                  
Principal amount [1],[2],[3],[5] 55,582                  
Investment, Identifier [Axis]: Einstein Parent, Inc.., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (57)                  
Investments at fair value [2],[3],[8] (57)                  
Principal amount [2],[3],[5],[8] 5,750                  
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9],[34]       (14)            
Investments at fair value [6],[7],[9],[34]       0            
Principal amount [6],[7],[9],[10],[34]       1,400            
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 0                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 909                  
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[8],[27] 0                  
Investments at fair value [2],[8],[27] 0                  
Principal amount [2],[5],[8],[27] 2,723                  
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (14)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 1,400                  
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 8,483 [2],[27]     10,127 [6],[28]            
Investments at fair value 8,527 [2],[27]     10,185 [6],[28]            
Principal amount 8,527 [2],[5],[27]     10,185 [6],[10],[28]            
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,721 [1],[2],[3]     5,636 [6],[7],[15]            
Investments at fair value 4,753 [1],[2],[3]     5,677 [6],[7],[15]            
Principal amount 4,753 [1],[2],[3],[5]     5,677 [6],[7],[10],[15]            
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,846 [2],[27]     3,398 [6],[28]            
Investments at fair value 2,863 [2],[27]     3,419 [6],[28]            
Principal amount 2,863 [2],[5],[27]     3,419 [6],[10],[28]            
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 4                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,829 [2],[27]     3,378 [6],[28]            
Investments at fair value 2,844 [2],[27]     3,397 [6],[28]            
Principal amount 2,844 [2],[5],[27]     3,397 [6],[10],[28]            
Investment, Identifier [Axis]: FS WhiteWater Holdings, LLC, Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 5,000 [2],[27],[35]     5,000 [6],[28],[34]            
Investments at fair value 4,655 [2],[27],[35]     4,618 [6],[28],[34]            
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3],[36] 8,039                  
Investments at fair value [1],[2],[3],[36] 8,038                  
Principal amount [1],[2],[3],[5],[36] 8,058                  
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 0                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 4,740                  
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (4)                  
Investments at fair value [2],[3],[8] (4)                  
Principal amount [2],[3],[5],[8] 1,422                  
Investment, Identifier [Axis]: Firebird Co-Invest L.P, LP Interest                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[36] 3,358                  
Investments at fair value [2],[3],[36] 3,358                  
Investment, Identifier [Axis]: Flash Charm Inc. (fka Idera, Inc.), Second lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[16] 14,967                  
Investments at fair value [2],[16] 14,319                  
Principal amount [2],[5],[16] 15,091                  
Investment, Identifier [Axis]: Flash Charm Inc. (fka Idera, Inc.), Second lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3] 2,006                  
Investments at fair value [1],[2],[3] 1,909                  
Principal amount [1],[2],[3],[5] 2,012                  
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First Lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3] 4,034                  
Investments at fair value [1],[2],[3] 4,064                  
Principal amount [1],[2],[3],[5] 4,064                  
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First Lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[11],[12] 36,918                  
Investments at fair value [2],[11],[12] 37,095                  
Principal amount [2],[5],[11],[12] 37,095                  
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First Lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 597                  
Investments at fair value [2],[3],[8] 601                  
Principal amount [2],[3],[5],[8] 601                  
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,312 [2],[3],[5],[8]     3,312 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (17) [2],[3],[8]     (21) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,710 [2],[3],[5],[8]     2,095 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 18,295 [2],[11],[12]     33,163 [6],[13],[14]            
Investments at fair value 18,372 [2],[11],[12]     33,356 [6],[13],[14]            
Principal amount 18,372 [2],[5],[11],[12]     33,356 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,696 [1],[2],[3]     4,041 [6],[7],[15]            
Investments at fair value 7,744 [1],[2],[3]     4,075 [6],[7],[15]            
Principal amount 7,744 [1],[2],[3],[5]     4,075 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Foreside Financial Group, LLC, Subordinated                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3] 16,802                  
Investments at fair value [2],[3] 16,953                  
Principal amount [2],[3],[5] 16,953                  
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Drawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,274 [2],[3],[8]     990 [6],[7],[9]            
Investments at fair value 1,287 [2],[3],[8]     1,001 [6],[7],[9]            
Principal amount 1,287 [2],[3],[5],[8]     1,001 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Drawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 99 [2],[3],[8]     343 [6],[7],[9]            
Investments at fair value 98 [2],[3],[8]     342 [6],[7],[9]            
Principal amount 98 [2],[3],[5],[8]     342 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,262 [2],[3],[5],[8]     3,360 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (16) [2],[3],[8]     (19) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,573 [2],[3],[5],[8]     1,859 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 17,028 [2],[11],[12]     17,066 [6],[13],[14]            
Investments at fair value 17,132 [2],[11],[12]     17,176 [6],[13],[14]            
Principal amount 17,132 [2],[5],[11],[12]     17,176 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 12,260 [1],[2],[3]     11,946 [6],[7],[15]            
Investments at fair value 12,330 [1],[2],[3]     12,020 [6],[7],[15]            
Principal amount 12,330 [1],[2],[3],[5]     12,020 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 79 [2],[3]     79 [6],[7]            
Investments at fair value 79 [2],[3]     80 [6],[7]            
Principal amount 79 [2],[3],[5]     80 [6],[7],[10]            
Investment, Identifier [Axis]: Foundational Education Group, Inc., Second lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 22,426 [2],[27]     22,423 [6],[28]            
Investments at fair value 22,500 [2],[27]     22,500 [6],[28]            
Principal amount 22,500 [2],[5],[27]     22,500 [6],[10],[28]            
Investment, Identifier [Axis]: Foundational Education Group, Inc., Second lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 10,720 [1],[2],[3]     6,992 [6],[13],[14]            
Investments at fair value 10,965 [1],[2],[3]     7,009 [6],[13],[14]            
Principal amount 10,965 [1],[2],[3],[5]     7,009 [6],[10],[13],[14]            
Investment, Identifier [Axis]: GC Waves Holdings, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (30) [2],[3],[8]     (30) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,951 [2],[3],[5],[8]     3,951 [6],[7],[9],[10]            
Investment, Identifier [Axis]: GC Waves Holdings, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 39,992 [2],[11],[12]     40,084 [6],[13],[14]            
Investments at fair value 40,211 [2],[11],[12]     40,312 [6],[13],[14]            
Principal amount 40,211 [2],[5],[11],[12]     40,312 [6],[10],[13],[14]            
Investment, Identifier [Axis]: GC Waves Holdings, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 21,335 [2],[27]     21,386 [6],[28]            
Investments at fair value 21,395 [2],[27]     21,448 [6],[28]            
Principal amount 21,395 [2],[5],[27]     21,448 [6],[10],[28]            
Investment, Identifier [Axis]: GEDC Equity, LLC, Participation Interest                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 190 [2],[3]     190 [6],[7]            
Investments at fair value 50 [2],[3]     50 [6],[7]            
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 318 [2],[3],[8]     319 [6],[7],[9]            
Investments at fair value 318 [2],[3],[8]     319 [6],[7],[9]            
Principal amount 318 [2],[3],[5],[8]     319 [6],[7],[9],[10]            
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,120 [2],[3],[5],[8]     1,120 [6],[7],[9],[10]            
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (26) [2],[3],[8]     (26) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 4,821 [2],[3],[5],[8]     4,821 [6],[7],[9],[10]            
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 34,576 [2],[11],[12]     34,663 [6],[13],[14]            
Investments at fair value 34,628 [2],[11],[12]     34,719 [6],[13],[14]            
Principal amount 34,628 [2],[5],[11],[12]     34,719 [6],[10],[13],[14]            
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 21,209 [2],[27]     21,263 [6],[28]            
Investments at fair value 21,241 [2],[27]     21,297 [6],[28]            
Principal amount 21,241 [2],[5],[27]     21,297 [6],[10],[28]            
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,895 [1],[2],[3]     2,902 [6],[7],[15]            
Investments at fair value 2,901 [1],[2],[3]     2,909 [6],[7],[15]            
Principal amount 2,901 [1],[2],[3],[5]     2,909 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Galway Borrower LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,081 [2],[11],[12]     1,083 [6],[13],[14]            
Investments at fair value 1,077 [2],[11],[12]     1,080 [6],[13],[14]            
Principal amount 1,087 [2],[5],[11],[12]     1,090 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Galway Borrower LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       1,779            
Investments at fair value [6],[7],[9]       1,788            
Principal amount [6],[7],[9],[10]       1,806            
Investment, Identifier [Axis]: Galway Borrower LLC, First lien Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 1,775                  
Investments at fair value [2],[3],[8] 1,783                  
Principal amount [2],[3],[5],[8] 1,801                  
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 17,815 [2],[11],[12]     17,858 [6],[13],[14]            
Investments at fair value 17,856 [2],[11],[12]     17,856 [6],[13],[14]            
Principal amount 17,856 [2],[5],[11],[12]     17,901 [6],[10],[13],[14]            
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 444 [2],[3],[8]     445 [6],[7],[9]            
Investments at fair value 446 [2],[3],[8]     446 [6],[7],[9]            
Principal amount 446 [2],[3],[5],[8]     448 [6],[7],[9],[10]            
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (4) [2],[3],[8]     (4) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     (4) [6],[7],[9]            
Principal amount 1,682 [2],[3],[5],[8]     1,682 [6],[7],[9],[10]            
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (10) [2],[3],[8]     (10) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     (10) [6],[7],[9]            
Principal amount 4,038 [2],[3],[5],[8]     4,038 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Greenway Health, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,210 [1],[2],[3]     6,221 [6],[7],[15]            
Investments at fair value 6,286 [1],[2],[3]     6,302 [6],[7],[15]            
Principal amount 6,286 [1],[2],[3],[5]     6,302 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Groundworks, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [17]       18,734            
Investments at fair value [17]       19,034            
Principal amount [10],[17]       18,908            
Investment, Identifier [Axis]: Groundworks, LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [9],[17]       552            
Investments at fair value [9],[17]       560            
Principal amount [9],[10],[17]       557            
Investment, Identifier [Axis]: Groundworks, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [9],[17]       (15)            
Investments at fair value [9],[17]       20            
Principal amount [9],[10],[17]       2,938            
Investment, Identifier [Axis]: HBWM Holdings, LLC, Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[37] 4,733                  
Investments at fair value [2],[37] 9,532                  
Investment, Identifier [Axis]: HBWM Holdings, LLC, Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[38]       4,717            
Investments at fair value [6],[38]       9,532            
Investment, Identifier [Axis]: HS Purchaser, LLC / Help/Systems Holdings, Inc., Second lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 22,441 [27]     22,441 [28]            
Investments at fair value 16,313 [27]     14,513 [28]            
Principal amount 22,500 [5],[27]     22,500 [10],[28]            
Investment, Identifier [Axis]: HS Purchaser, LLC / Help/Systems Holdings, Inc., Second lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,188 [11],[12]     4,188 [13],[14]            
Investments at fair value 3,051 [11],[12]     2,714 [13],[14]            
Principal amount 4,208 [5],[11],[12]     4,208 [10],[13],[14]            
Investment, Identifier [Axis]: Healthspan Buyer, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 5,013 [1],[2],[3]     5,025 [6],[7],[15]            
Investments at fair value 5,056 [1],[2],[3]     5,069 [6],[7],[15]            
Principal amount 5,056 [1],[2],[3],[5]     5,069 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Healthspan Buyer, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (12) [2],[3],[8]     (12) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,229 [2],[3],[5],[8]     1,229 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,798 [1],[2],[3]     3,808 [6],[7],[15]            
Investments at fair value 3,798 [1],[2],[3]     3,808 [6],[7],[15]            
Principal amount 3,798 [1],[2],[3],[5]     3,808 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,300 [2],[3],[8]     2,302 [6],[7],[9]            
Investments at fair value 3,315 [2],[3],[8]     2,313 [6],[7],[9]            
Principal amount 3,315 [2],[3],[5],[8]     2,313 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 4,665 [2],[3],[5],[8]     5,676 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Houghton Mifflin Harcourt Company, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 14,091 [1],[3]     14,108 [7],[15]            
Investments at fair value 14,300 [1],[3]     14,291 [7],[15]            
Principal amount 14,447 [1],[3],[5]     14,484 [7],[10],[15]            
Investment, Identifier [Axis]: IG Investments Holdings, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (38) [2],[3],[8]     (38) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,780 [2],[3],[5],[8]     3,780 [6],[7],[9],[10]            
Investment, Identifier [Axis]: IG Investments Holdings, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 32,540 [2],[11],[12]     32,611 [6],[13],[14]            
Investments at fair value 32,717 [2],[11],[12]     32,799 [6],[13],[14]            
Principal amount 32,717 [2],[5],[11],[12]     32,799 [6],[10],[13],[14]            
Investment, Identifier [Axis]: IG Investments Holdings, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,534 [1],[2],[3]     2,540 [6],[7],[15]            
Investments at fair value 2,536 [1],[2],[3]     2,542 [6],[7],[15]            
Principal amount 2,536 [1],[2],[3],[5]     2,542 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Icefall Parent, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 8,622 [1],[2],[3]     8,619 [6],[7],[15]            
Investments at fair value 8,696 [1],[2],[3]     8,696 [6],[7],[15]            
Principal amount 8,696 [1],[2],[3],[5]     8,696 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Icefall Parent, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (8) [2],[3],[8]     (8) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 828 [2],[3],[5],[8]     828 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Idera, Inc., Second lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[17]       14,961            
Investments at fair value [6],[17]       15,091            
Principal amount [6],[10],[17]       15,091            
Investment, Identifier [Axis]: Idera, Inc., Second lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[15]       2,006            
Investments at fair value [6],[7],[15]       2,012            
Principal amount [6],[7],[10],[15]       2,012            
Investment, Identifier [Axis]: Infogain Corporation, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (29) [2],[3],[8]     (29) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,827 [2],[3],[5],[8]     3,827 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Infogain Corporation, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[13],[14]       18,291            
Investments at fair value [6],[13],[14]       18,372            
Principal amount [6],[10],[13],[14]       18,372            
Investment, Identifier [Axis]: Infogain Corporation, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[15]       7,713            
Investments at fair value [6],[7],[15]       7,764            
Principal amount [6],[7],[10],[15]       7,764            
Investment, Identifier [Axis]: Infogain Corporation, Subordinated                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7]       16,795            
Investments at fair value [6],[7]       16,953            
Principal amount [6],[7],[10]       16,953            
Investment, Identifier [Axis]: Integro Parent Inc., Second lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[15],[21]       6,405            
Investments at fair value [6],[7],[15],[21]       6,331            
Principal amount [6],[7],[10],[15],[21]       7,091            
Investment, Identifier [Axis]: Ivy Hill Middle Market Credit Fund, Ltd, Structured Finance Obligations                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [7],[21]       3,232            
Investments at fair value [7],[21]       3,232            
Investment, Identifier [Axis]: Ivy Hill Middle Market Credit Fund, Ltd, Structured Finance Obligations                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3] 3,232                  
Investments at fair value [2],[3] 3,232                  
Principal amount [2],[3],[5] 3,232                  
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 19 [2],[3],[8]     19 [6],[7],[9]            
Investments at fair value 18 [2],[3],[8]     18 [6],[7],[9]            
Principal amount 19 [2],[3],[5],[8]     19 [6],[7],[9],[10]            
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value (45) [2],[3],[8]     (47) [6],[7],[9]            
Principal amount 1,568 [2],[3],[5],[8]     1,568 [6],[7],[9],[10],[20]            
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,770 [1],[2],[3]     6,785 [6],[7],[15]            
Investments at fair value 6,591 [1],[2],[3]     6,570 [6],[7],[15]            
Principal amount 6,809 [1],[2],[3],[5]     6,827 [6],[7],[10],[15]            
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,138 [1],[2],[3]     1,140 [6],[7],[15]            
Investments at fair value 1,109 [1],[2],[3]     1,106 [6],[7],[15]            
Principal amount 1,146 [1],[2],[3],[5]     1,149 [6],[7],[10],[15]            
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 776 [1],[2],[3]     777 [6],[7],[15]            
Investments at fair value 755 [1],[2],[3]     752 [6],[7],[15]            
Principal amount 780 [1],[2],[3],[5]     782 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Kaseya Inc., First lien - Drawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9],[15]       966            
Investments at fair value [6],[7],[9],[15]       973            
Principal amount [6],[7],[9],[10],[15]       973            
Investment, Identifier [Axis]: Kaseya Inc., First lien - Drawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       746            
Investments at fair value [6],[7],[9]       751            
Principal amount [6],[7],[9],[10]       751            
Investment, Identifier [Axis]: Kaseya Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       0            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       2,865            
Investment, Identifier [Axis]: Kaseya Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (22)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       2,888            
Investment, Identifier [Axis]: Kaseya Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[13],[14]       63,786            
Investments at fair value [6],[13],[14]       64,124            
Principal amount [6],[10],[13],[14]       64,124            
Investment, Identifier [Axis]: Kaseya Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[15]       237            
Investments at fair value [6],[7],[15]       238            
Principal amount [6],[7],[10],[15]       238            
Investment, Identifier [Axis]: Kele Holdco, Inc. First Lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3],[8] 179                  
Investments at fair value [1],[2],[3],[8] 180                  
Principal amount [1],[2],[3],[5],[8] 180                  
Investment, Identifier [Axis]: Kele Holdco, Inc. First Lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[27] 14,578                  
Investments at fair value [2],[27] 14,594                  
Principal amount [2],[5],[27] 14,594                  
Investment, Identifier [Axis]: Kele Holdco, Inc. First Lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[27] 1,254                  
Investments at fair value [2],[27] 1,261                  
Principal amount [2],[5],[27] 1,261                  
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (9)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       1,799            
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[28]       14,617            
Investments at fair value [6],[28]       14,635            
Principal amount [6],[10],[28]       14,635            
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[28]       2,254            
Investments at fair value [6],[28]       2,268            
Principal amount [6],[10],[28]       2,268            
Investment, Identifier [Axis]: Kele Holdco, Inc.., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (8)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 1,619                  
Investment, Identifier [Axis]: Kene Acquisition, Inc, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 160                  
Investments at fair value [2],[3],[8] 162                  
Principal amount [2],[3],[5],[8] 162                  
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,470 [2],[11],[12]     3,477 [6],[13],[14]            
Investments at fair value 3,500 [2],[11],[12]     3,509 [6],[13],[14]            
Principal amount 3,500 [2],[5],[11],[12]     3,509 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       161            
Investments at fair value [6],[7],[9]       162            
Principal amount [6],[7],[9],[10]       162            
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,398 [2],[3],[5],[8]     1,398 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (5) [2],[3],[8]     (5) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 468 [2],[3],[5],[8]     468 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Knockout Intermediate Holdings I Inc., Preferred shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 13,143 [2],[3]     20,819 [6],[7],[39]            
Investments at fair value 13,236 [2],[3]     21,010 [6],[7],[39]            
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,095 [2],[27]     6,065 [6],[28]            
Investments at fair value 6,090 [2],[27]     6,062 [6],[28]            
Principal amount 6,151 [2],[5],[27]     6,124 [6],[10],[28]            
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 329 [2],[3],[8]     71 [6],[7],[9]            
Investments at fair value 329 [2],[3],[8]     71 [6],[7],[9]            
Principal amount 333 [2],[3],[5],[8]     72 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[8],[27]     0            
Investments at fair value (4) [2],[8],[27]     (4)            
Principal amount 358 [2],[5],[8],[27]     358 [10]            
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (4) [2],[3],[8]     (6) [6],[7],[9]            
Investments at fair value (4) [2],[3],[8]     (6) [6],[7],[9]            
Principal amount 383 [2],[3],[5],[8]     644 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Logrhythm, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,140 [2],[3]     4,138 [6],[7],[15]            
Investments at fair value 4,127 [2],[3]     4,196 [6],[7],[15]            
Principal amount 4,196 [2],[3],[5]     4,196 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Logrhythm, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (6) [2],[3],[8]     (6) [6],[7],[9]            
Investments at fair value (7) [2],[3],[8]     0 [6],[7],[9]            
Principal amount 420 [2],[3],[5],[8]     420 [6],[7],[9],[10]            
Investment, Identifier [Axis]: MRI Software LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 111 [2],[3],[8]     111 [6],[7],[9]            
Investments at fair value 111 [2],[3],[8]     111 [6],[7],[9]            
Principal amount 111 [2],[3],[5],[8]     111 [6],[7],[9],[10]            
Investment, Identifier [Axis]: MRI Software LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (9)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       1,891            
Investment, Identifier [Axis]: MRI Software LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 21,345 [2],[27]     21,398 [6],[28]            
Investments at fair value 21,373 [2],[27]     21,430 [6],[28]            
Principal amount 21,373 [2],[5],[27]     21,430 [6],[10],[28]            
Investment, Identifier [Axis]: MRI Software LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,561 [1],[2],[3]     7,580 [6],[7],[15]            
Investments at fair value 7,571 [1],[2],[3]     7,591 [6],[7],[15]            
Principal amount 7,571 [1],[2],[3],[5]     7,591 [6],[7],[10],[15]            
Investment, Identifier [Axis]: MRI Software LLC, First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,509 [2],[11],[12]     4,516 [6],[13],[14]            
Investments at fair value 4,509 [2],[11],[12]     4,521 [6],[13],[14]            
Principal amount 4,509 [2],[5],[11],[12]     4,521 [6],[10],[13],[14]            
Investment, Identifier [Axis]: MRI Software LLC, First lien 4                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,096 [2],[11],[12]     3,103 [6],[13],[14]            
Investments at fair value 3,099 [2],[11],[12]     3,107 [6],[13],[14]            
Principal amount 3,099 [2],[5],[11],[12]     3,107 [6],[10],[13],[14]            
Investment, Identifier [Axis]: MRI Software LLC, First lien 5                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 790 [1],[2],[3]     792 [6],[7],[15]            
Investments at fair value 791 [1],[2],[3]     793 [6],[7],[15]            
Principal amount 791 [1],[2],[3],[5]     793 [6],[7],[10],[15]            
Investment, Identifier [Axis]: MRI Software LLC., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (9)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 1,891                  
Investment, Identifier [Axis]: Michael Baker International, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [7],[15]       4,869            
Investments at fair value [7],[15]       4,910            
Principal amount [7],[10],[15]       4,892            
Investment, Identifier [Axis]: Model N, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 43,904 [2],[11],[12]     44,008 [6],[13],[14]            
Investments at fair value 43,886 [2],[11],[12]     43,997 [6],[13],[14]            
Principal amount 44,107 [2],[5],[11],[12]     44,218 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Model N, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (24) [2],[3],[8]     (24) [6],[7],[9]            
Investments at fair value (24) [2],[3],[8]     (24) [6],[7],[9]            
Principal amount 4,825 [2],[3],[5],[8]     4,825 [6],[7],[9],[10],[20]            
Investment, Identifier [Axis]: Model N, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value (45) [2],[3],[8]     (45) [6],[7],[9]            
Principal amount 9,047 [2],[3],[5],[8]     9,047 [6],[7],[9],[10],[20]            
Investment, Identifier [Axis]: NC Topco, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 5,851 [2],[11],[12]     5,825 [6],[13],[14]            
Investments at fair value 5,849 [2],[11],[12]     5,824 [6],[13],[14]            
Principal amount 5,879 [2],[5],[11],[12]     5,853 [6],[10],[13],[14]            
Investment, Identifier [Axis]: NC Topco, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (3) [2],[3],[8]     (3) [6],[7],[9]            
Investments at fair value (3) [2],[3],[8]     (3) [6],[7],[9]            
Principal amount 669 [2],[3],[5],[8]     669 [6],[7],[9],[10]            
Investment, Identifier [Axis]: NC Topco, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value (8) [2],[3],[8]     (8) [6],[7],[9]            
Principal amount 1,672 [2],[3],[5],[8]     1,672 [6],[7],[9],[10]            
Investment, Identifier [Axis]: NHME Holdings Corp., Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,000 [2],[3],[40]     4,000 [6],[7],[41]            
Investments at fair value 0 [2],[3],[40]     0 [6],[7],[41]            
Investment, Identifier [Axis]: NHME Holdings Corp., Warrants                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,000 [2],[3],[40]     1,000 [6],[7],[41]            
Investments at fair value 0 [2],[3],[40]     0 [6],[7],[41]            
Investment, Identifier [Axis]: NM GP Holdco, LLC, Membership interest                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 850 [2],[4],[42]     850 [6],[21],[43]            
Investments at fair value 383 [2],[4],[42]     322 [6],[21],[43]            
Investment, Identifier [Axis]: NM NL Holdings, L.P., Membership interest                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 74,248 [2],[4],[42]     74,248 [6],[21],[43]            
Investments at fair value 105,211 [2],[4],[42]     104,512 [6],[21],[43]            
Investment, Identifier [Axis]: NM YI, LLC, Membership interest                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,272 [2],[42]     6,272 [6],[43]            
Investments at fair value 8,927 [2],[42]     9,960 [6],[43]            
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 19,116 [1],[2],[3]     19,106 [6],[7],[15]            
Investments at fair value 19,259 [1],[2],[3]     19,259 [6],[7],[15]            
Principal amount 19,259 [1],[2],[3],[5]     19,259 [6],[7],[10],[15]            
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,997 [1],[2],[3]     4,996 [6],[7],[15]            
Investments at fair value 5,012 [1],[2],[3]     5,012 [6],[7],[15]            
Principal amount 5,012 [1],[2],[3],[5]     5,012 [6],[7],[10],[15]            
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,876 [2],[11],[12]     4,874 [6],[13],[14]            
Investments at fair value 4,913 [2],[11],[12]     4,913 [6],[13],[14]            
Principal amount 4,913 [2],[5],[11],[12]     4,913 [6],[10],[13],[14]            
Investment, Identifier [Axis]: NMFC Senior Loan Program III LLC, Membership interest                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 160,000 [2],[3],[4]     160,000 [6],[7],[21]            
Investments at fair value 160,000 [2],[3],[4]     160,000 [6],[7],[21]            
Investment, Identifier [Axis]: NMFC Senior Loan Program IV LLC, Membership interest                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 112,400 [2],[3],[4]     112,400 [6],[7],[21]            
Investments at fair value 112,400 [2],[3],[4]     112,400 [6],[7],[21]            
Investment, Identifier [Axis]: National HME, Inc., Second lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,872 [2],[3],[40]     7,871 [6],[7],[41]            
Investments at fair value 3,000 [2],[3],[40]     3,000 [6],[7],[41]            
Principal amount 8,281 [2],[3],[5],[40]     8,281 [6],[7],[10],[41]            
Investment, Identifier [Axis]: National HME, Inc., Second lien, Non-accrual status                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Unearned interest income 493                  
Investment, Identifier [Axis]: Nelipak Holding Company First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Principal amount       17,109            
Investment, Identifier [Axis]: Nelipak Holding Company First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Principal amount       406            
Investment, Identifier [Axis]: Nelipak Holding Company First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Principal amount       6,638            
Investment, Identifier [Axis]: Nelipak Holding Company First lien 4                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Principal amount       833            
Investment, Identifier [Axis]: Nelipak Holding Company, Drawn Revolver                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Principal amount 226                  
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Drawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,296 [1],[2],[3],[8],[44]     1,089 [6],[7],[9],[15],[45]            
Investments at fair value 1,306 [1],[2],[3],[8],[44]     1,097 [6],[7],[9],[15],[45]            
Principal amount 1,306 [1],[2],[3],[5],[8],[44]     1,097 [6],[7],[9],[10],[15],[45]            
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Drawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 224 [2],[3],[8]     406 [6],[7],[9]            
Investments at fair value 226 [2],[3],[8]     405 [6],[7],[9]            
Principal amount   € 209 [8]   392 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,501 [2],[3],[5],[8]     3,501 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [1],[2],[3],[8],[44]     0 [6],[7],[9],[15],[45]            
Investments at fair value 0 [1],[2],[3],[8],[44]     0 [6],[7],[9],[15],[45]            
Principal amount   6,411 [1],[8],[44]   6,411 [6],[7],[9],[10],[15],[45]            
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (7) [1],[2],[3],[8],[44]     (6) [6],[7],[9],[15],[45]            
Investments at fair value 0 [1],[2],[3],[8],[44]     0 [6],[7],[9],[15],[45]            
Principal amount   987 [1],[8],[44]   804 [6],[7],[9],[10],[15],[45]            
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 4                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (10) [2],[3],[8]     (11) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,306 [2],[3],[5],[8]     1,515 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Nelipak Holding Company, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 17,735 [1],[2],[3],[44]     17,776 [6],[7],[15],[45]            
Investments at fair value 17,830 [1],[2],[3],[44]     17,108 [6],[7],[15],[45]            
Principal amount 17,830 € 16,482 [1],[44]     € 16,523          
Investment, Identifier [Axis]: Nelipak Holding Company, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 8,940 [2],[11],[12]     8,961 [6],[13],[14]            
Investments at fair value 9,001 [2],[11],[12]     9,023 [6],[13],[14]            
Principal amount 9,001 [2],[5],[11],[12]     9,023 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Nelipak Holding Company, Undrawn Delayed Draw Term Loan                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Principal amount 6,935                  
Investment, Identifier [Axis]: Nelipak Holding Company, Undrawn Revolver                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Principal amount 1,068                  
Investment, Identifier [Axis]: New Benevis Holdco, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 47,496 [2],[12]     46,068 [6],[14]            
Investments at fair value 47,496 [2],[12]     46,068 [6],[14]            
Principal amount 47,496 [2],[5],[12]     46,068 [6],[10],[14]            
Investment, Identifier [Axis]: New Benevis Holdco, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 36,948 [1],[2],[3]     33,155 [6],[7],[15]            
Investments at fair value 36,948 [1],[2],[3]     33,155 [6],[7],[15]            
Principal amount 36,948 [1],[2],[3],[5]     33,155 [6],[7],[10],[15]            
Investment, Identifier [Axis]: New Benevis Holdco, Inc., Subordinated                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 23,776 [2],[3]     22,942 [6],[7]            
Investments at fair value 19,628 [2],[3]     19,051 [6],[7]            
Principal amount 24,535 [2],[3],[5]     23,814 [6],[7],[10]            
Investment, Identifier [Axis]: New Benevis Topco, LLC, Ordinary shares 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 27,154 [2],[12]     27,154 [6],[14]            
Investments at fair value 27,697 [2],[12]     28,481 [6],[14]            
Investment, Identifier [Axis]: New Benevis Topco, LLC, Ordinary shares 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 12,768 [2],[3]     12,768 [6],[7]            
Investments at fair value 12,980 [2],[3]     13,347 [6],[7]            
Investment, Identifier [Axis]: New Permian Holdco, Inc., Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 11,155 [2],[3]     11,155 [6],[7]            
Investments at fair value 16,000 [2],[3]     18,900 [6],[7]            
Investment, Identifier [Axis]: New Permian Holdco, L.L.C., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 23,336 [1],[2],[3]     23,336 [6],[7],[15]            
Investments at fair value 23,336 [1],[2],[3]     23,336 [6],[7],[15]            
Principal amount 23,336 [1],[2],[3],[5]     23,336 [6],[7],[10],[15]            
Investment, Identifier [Axis]: New Permian Holdco, L.L.C., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 22,184 [1],[2],[3],[8]     20,840 [6],[7],[9],[15]            
Investments at fair value 22,184 [1],[2],[3],[8]     20,840 [6],[7],[9],[15]            
Principal amount 22,184 [1],[2],[3],[5],[8]     20,840 [6],[7],[9],[10],[15]            
Investment, Identifier [Axis]: New Permian Holdco, L.L.C., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 9,710 [2],[3],[5],[8]     1,055 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Next Holdco, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,276 [2],[11],[12]     3,471 [6],[13],[14]            
Investments at fair value 6,312 [2],[11],[12]     3,494 [6],[13],[14]            
Principal amount 6,312 [2],[5],[11],[12]     3,494 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       0            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       903            
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (3)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       339            
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 0                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 903                  
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (3)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 339                  
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (5) [2],[3],[8]     (7) [6],[7],[9]            
Investments at fair value (99) [2],[3],[8]     (71) [6],[7],[9]            
Principal amount 646 [2],[3],[5],[8]     880 [6],[7],[9],[10],[20]            
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 10,058 [1],[2],[3]     10,017 [6],[7],[15]            
Investments at fair value 8,553 [1],[2],[3]     9,241 [6],[7],[15]            
Principal amount 10,096 [1],[2],[3],[5]     10,058 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 9,930 [1],[2],[3]     9,889 [6],[7],[15]            
Investments at fair value 8,446 [1],[2],[3]     9,126 [6],[7],[15]            
Principal amount 9,970 [1],[2],[3],[5]     9,932 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 874 [1],[2],[3]     870 [6],[7],[15]            
Investments at fair value 745 [1],[2],[3]     805 [6],[7],[15]            
Principal amount 880 [1],[2],[3],[5]     877 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 233                  
Investments at fair value [2],[3],[8] 199                  
Principal amount [2],[3],[5],[8] 235                  
Investment, Identifier [Axis]: OA Buyer, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (36) [2],[3],[8]     (36) [6],[7],[9],[46]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9],[46]            
Principal amount 3,600 [2],[3],[5],[8]     3,600 [6],[7],[9],[10],[46]            
Investment, Identifier [Axis]: OA Buyer, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 31,367 [2],[11],[12]     31,442 [6],[13],[14]            
Investments at fair value 31,434 [2],[11],[12]     31,513 [6],[13],[14]            
Principal amount 31,434 [2],[5],[11],[12]     31,513 [6],[10],[13],[14]            
Investment, Identifier [Axis]: OA Buyer, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 27,188 [2],[11],[12]     27,248 [6],[13],[14]            
Investments at fair value 27,355 [2],[11],[12]     27,425 [6],[13],[14]            
Principal amount 27,355 [2],[5],[11],[12]     27,425 [6],[10],[13],[14]            
Investment, Identifier [Axis]: OA Buyer, Inc., First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,721 [2],[11],[12]     1,724 [6],[13],[14]            
Investments at fair value 1,732 [2],[11],[12]     1,736 [6],[13],[14]            
Principal amount 1,732 [2],[5],[11],[12]     1,736 [6],[10],[13],[14]            
Investment, Identifier [Axis]: OA Topco, L.P., Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,000 [2],[3],[47]     2,000 [6],[7],[46]            
Investments at fair value 14,980 [2],[3],[47]     7,646 [6],[7],[46]            
Investment, Identifier [Axis]: OEConnection LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[13],[14]       46,214            
Investments at fair value [6],[13],[14]       46,430            
Principal amount [6],[10],[13],[14]       46,430            
Investment, Identifier [Axis]: OEConnection LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       0            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       8,101            
Investment, Identifier [Axis]: OEConnection LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (25)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       5,063            
Investment, Identifier [Axis]: OEConnection LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[11],[12] 46,104                  
Investments at fair value [2],[11],[12] 46,313                  
Principal amount [2],[5],[11],[12] 46,313                  
Investment, Identifier [Axis]: OEConnection LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3] 8,041                  
Investments at fair value [1],[2],[3] 8,081                  
Principal amount [1],[2],[3],[5] 8,081                  
Investment, Identifier [Axis]: OEConnection LLC., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (25)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 5,063                  
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (23) [2],[3],[8]     (23) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,860 [2],[3],[5],[8]     1,860 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 14,745 [1],[2],[3]     7,370 [6],[13],[14]            
Investments at fair value 14,880 [1],[2],[3]     7,440 [6],[13],[14]            
Principal amount 14,880 [1],[2],[3],[5]     7,440 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 5,407 [1],[2],[3]     7,369 [6],[7]            
Investments at fair value 5,454 [1],[2],[3]     7,440 [6],[7]            
Principal amount 5,454 [1],[2],[3],[5]     7,440 [6],[7],[10]            
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7]       5,404            
Investments at fair value [6],[7]       5,454            
Principal amount [6],[7],[10]       5,454            
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[17]       18,078            
Investments at fair value [6],[17]       18,161            
Principal amount [6],[10],[17]       18,161            
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 243 [2],[3],[8]     2,348 [6],[9],[17]            
Investments at fair value 244 [2],[3],[8]     2,360 [6],[9],[17]            
Principal amount 244 [2],[3],[5],[8]     2,360 [6],[9],[10],[17]            
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (8) [2],[3],[8]     0 [6],[9],[17]            
Investments at fair value 0 [2],[3],[8]     0 [6],[9],[17]            
Principal amount 1,586 [2],[3],[5],[8]     1,865 [6],[9],[10],[17]            
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[8],[16]     (9) [6],[7],[9]            
Investments at fair value 0 [2],[8],[16]     0 [6],[7],[9]            
Principal amount 1,865 [2],[5],[8],[16]     1,830 [6],[7],[9],[10]            
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[16] 20,378                  
Investments at fair value [2],[16] 20,469                  
Principal amount [2],[5],[16] 20,469                  
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3] 513                  
Investments at fair value [1],[2],[3] 513                  
Principal amount [1],[2],[3],[5] 513                  
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (5) [2],[3],[8]     (5) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 486 [2],[3],[5],[8]     486 [6],[7],[9],[10]            
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 22,279 [2],[16]     22,332 [6],[17]            
Investments at fair value 22,331 [2],[16]     22,388 [6],[17]            
Principal amount 22,331 [2],[5],[16]     22,388 [6],[10],[17]            
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 8,238 [2],[11],[12]     8,258 [6],[13],[14]            
Investments at fair value 8,238 [2],[11],[12]     8,258 [6],[13],[14]            
Principal amount 8,238 [2],[5],[11],[12]     8,258 [6],[10],[13],[14]            
Investment, Identifier [Axis]: PPVA Black Elk (Equity) LLC, Subordinated                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 14,500 [2],[3]     14,500 [6],[7]            
Investments at fair value 6,525 [2],[3]     6,525 [6],[7]            
Principal amount 14,500 [2],[3],[5]     14,500 [6],[7],[10]           $ 20,000
Investment, Identifier [Axis]: PPVA Fund, L.P., Collateralized Financing                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [23],[48]     0 [49],[50]            
Investments at fair value 0 [23],[48]     0 [49],[50]            
Principal amount 0 [5],[23],[48]     0 [10],[49],[50]            
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,617 [2],[11],[12]     7,635 [6],[13],[14]            
Investments at fair value 7,616 [2],[11],[12]     7,635 [6],[13],[14]            
Principal amount 7,635 [2],[5],[11],[12]     7,654 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9],[15]       258            
Investments at fair value [6],[7],[9],[15]       258            
Principal amount [6],[7],[9],[10],[15]       258            
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Drawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 615                  
Investments at fair value [2],[3],[8] 615                  
Principal amount [2],[3],[5],[8] 617                  
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Drawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3],[8] 210                  
Investments at fair value [1],[2],[3],[8] 210                  
Principal amount [1],[2],[3],[5],[8] 210                  
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (1) [2],[3],[8]     (2) [6],[7],[9]            
Investments at fair value (1) [2],[3],[8]     (2) [6],[7],[9]            
Principal amount 583 [2],[3],[5],[8]     643 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (2) [2],[3],[8]     (3) [6],[7],[9]            
Investments at fair value (2) [2],[3],[8]     (3) [6],[7],[9]            
Principal amount 691 [2],[3],[5],[8]     1,201 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Permian Trust, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3]     0 [6],[7],[49]            
Investments at fair value 0 [2],[3]     0 [6],[7],[49]            
Principal amount 3,409 [2],[3],[5]     3,409 [6],[7],[10],[49]            
Investment, Identifier [Axis]: Permian Trust, Trust Claim                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[51]     0 [6],[49],[52]            
Investments at fair value 0 [2],[51]     0 [6],[49],[52]            
Principal amount 247 [2],[5],[51]     247 [6],[10],[49],[52]            
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 27,833 [1],[2],[3]     27,895 [6],[13],[14]            
Investments at fair value 27,614 [1],[2],[3]     28,145 [6],[13],[14]            
Principal amount 28,074 [1],[2],[3],[5]     28,145 [6],[10],[13],[14]            
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value (61) [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,708 [2],[3],[5],[8]     3,708 [6],[7],[9],[10]            
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (37) [2],[3],[8]     (37) [6],[7],[9]            
Investments at fair value (61) [2],[3],[8]     0 [6],[7],[9]            
Principal amount 3,708 [2],[3],[5],[8]     3,708 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9],[53]       (26)            
Investments at fair value [6],[7],[9],[53]       0            
Principal amount [6],[7],[9],[10],[53]       3,284            
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 23,002 [1],[2],[3]     22,997 [6],[7],[15]            
Investments at fair value 23,089 [1],[2],[3]     23,089 [6],[7],[15]            
Principal amount 23,089 [1],[2],[3],[5]     23,089 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,364 [1],[2],[3]     2,364 [6],[7],[15]            
Investments at fair value 2,374 [1],[2],[3]     2,374 [6],[7],[15]            
Principal amount 2,374 [1],[2],[3],[5]     2,374 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Pioneer Buyer I, LLC., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8],[54] (26)                  
Investments at fair value [2],[3],[8],[54] 0                  
Principal amount [2],[3],[5],[8],[54] 3,284                  
Investment, Identifier [Axis]: Pioneer Topco I, L.P., Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,000 [2],[54],[55]     2,000 [6],[53],[56]            
Investments at fair value 2,000 [2],[54],[55]     2,000 [6],[53],[56]            
Investment, Identifier [Axis]: Planview Parent, Inc., Second lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 9,209 [1],[3]     9,208 [13],[14]            
Investments at fair value 9,196 [1],[3]     9,208 [13],[14]            
Principal amount 9,231 [1],[3],[5]     9,231 [10],[13],[14]            
Investment, Identifier [Axis]: Power Grid Holdings, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 22,177 [2],[16]     22,228 [6],[17]            
Investments at fair value 22,331 [2],[16]     22,387 [6],[17]            
Principal amount 22,331 [2],[5],[16]     22,387 [6],[10],[17]            
Investment, Identifier [Axis]: Power Grid Holdings, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (43) [2],[3],[8]     (43) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 4,289 [2],[3],[5],[8]     4,289 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Project Accelerate Parent, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 10,446 [2],[27]     10,470 [6],[28]            
Investments at fair value 10,493 [2],[27]     10,519 [6],[28]            
Principal amount 10,493 [2],[5],[27]     10,519 [6],[10],[28]            
Investment, Identifier [Axis]: Project Accelerate Parent, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (8)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       1,510            
Investment, Identifier [Axis]: Project Accelerate Parent, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (8)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 1,510                  
Investment, Identifier [Axis]: Project Essential Super Parent, Inc., Preferred shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 16,492 [2],[3]     15,929 [6],[7]            
Investments at fair value 15,548 [2],[3]     14,833 [6],[7]            
Investment, Identifier [Axis]: RLG Holdings, LLC, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 3,959 [11],[12]     3,970 [13],[14]            
Investments at fair value 3,660 [11],[12]     3,934 [13],[14]            
Principal amount 3,959 [5],[11],[12]     3,970 [10],[13],[14]            
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Trust Claim 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 152 [2],[12]     152 [6],[14]            
Investments at fair value 152 [2],[12]     152 [6],[14]            
Principal amount 152 [2],[5],[12]     152 [6],[10],[14]            
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Trust Claim 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 52 [2],[3]     52 [6],[7]            
Investments at fair value 52 [2],[3]     52 [6],[7]            
Principal amount 52 [2],[3],[5]     52 [6],[7],[10]            
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Warrants 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 183 [2],[12]     182 [6],[14]            
Investments at fair value 272 [2],[12]     327 [6],[14]            
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Warrants 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 63 [2],[3]     62 [6],[7]            
Investments at fair value 93 [2],[3]     112 [6],[7]            
Investment, Identifier [Axis]: Riskonnect Parent, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       0            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       6,349            
Investment, Identifier [Axis]: Riskonnect Parent, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] 0                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 6,349                  
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (2)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       384            
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 127 [2],[3],[8]     127 [6],[7],[9]            
Investments at fair value 128 [2],[3],[8]     128 [6],[7],[9]            
Principal amount 128 [2],[3],[5],[8]     128 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (2)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 384                  
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,408 [2],[11],[12]     7,425 [6],[13],[14]            
Investments at fair value 7,427 [2],[11],[12]     7,446 [6],[13],[14]            
Principal amount 7,427 [2],[5],[11],[12]     7,446 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,519 [1],[2],[3]     1,523 [6],[7],[15]            
Investments at fair value 1,519 [1],[2],[3]     1,523 [6],[7],[15]            
Principal amount 1,519 [1],[2],[3],[5]     1,523 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Sierra Enterprises, LLC                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 39,073 [1],[2],[3]     38,840 [6],[7],[15]            
Investments at fair value 42,345 [1],[2],[3]     42,450 [6],[7],[15]            
Principal amount 42,345 [1],[2],[3],[5]     42,450 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation, Ordinary shares 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 11,501 [2],[12]     11,501 [6],[14]            
Investments at fair value 1,799 [2],[12]     1,799 [6],[14]            
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation, Ordinary shares 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,282 [2],[3]     1,282 [6],[7]            
Investments at fair value 201 [2],[3]     201 [6],[7]            
Investment, Identifier [Axis]: Specialtycare, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 231 [1],[2],[3],[8]     319 [6],[7],[9],[15]            
Investments at fair value 228 [1],[2],[3],[8]     315 [6],[7],[9],[15]            
Principal amount 235 [1],[2],[3],[5],[8]     324 [6],[7],[9],[10],[15]            
Investment, Identifier [Axis]: Specialtycare, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (5) [2],[3],[8]     (4) [6],[7],[9]            
Investments at fair value (9) [2],[3],[8]     (7) [6],[7],[9]            
Principal amount 324 [2],[3],[5],[8]     235 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Specialtycare, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 10,145 [2],[11],[12]     10,167 [6],[13],[14]            
Investments at fair value 9,927 [2],[11],[12]     9,953 [6],[13],[14]            
Principal amount 10,220 [2],[5],[11],[12]     10,247 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Specialtycare, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 75 [1],[2],[3]     76 [6],[7],[15]            
Investments at fair value 75 [1],[2],[3]     75 [6],[7],[15]            
Principal amount 77 [1],[2],[3],[5]     77 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc., Preferred shares 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 16,979 [2],[16]     16,363 [6],[17]            
Investments at fair value 16,815 [2],[16]     16,450 [6],[17]            
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc., Preferred shares 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 5,853 [1],[2],[3]     5,641 [6],[7],[15]            
Investments at fair value 5,797 [1],[2],[3]     5,671 [6],[7],[15]            
Investment, Identifier [Axis]: Syndigo LLC, Second lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 22,402 [2],[16]     22,397 [6],[17]            
Investments at fair value 22,500 [2],[16]     22,500 [6],[17]            
Principal amount 22,500 [2],[5],[16]     22,500 [6],[10],[17]            
Investment, Identifier [Axis]: Syndigo LLC, Second lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 5,706 [2],[11],[12]     5,706 [6],[13],[14]            
Investments at fair value 5,697 [2],[11],[12]     5,697 [6],[13],[14]            
Principal amount 5,697 [2],[5],[11],[12]     5,697 [6],[10],[13],[14]            
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 2,695 [2],[3],[5],[8]     2,695 [6],[7],[9],[10]            
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 11,951 [2],[12]     11,782 [6],[14]            
Investments at fair value 10,526 [2],[12]     10,402 [6],[14]            
Principal amount 12,475 [2],[5],[12]     12,327 [6],[10],[14]            
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 9,941 [1],[2],[3]     9,818 [6],[7]            
Investments at fair value 8,474 [1],[2],[3]     8,374 [6],[7]            
Principal amount 10,043 [1],[2],[3],[5]     9,925 [6],[7],[10]            
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,359 [1],[2],[3]     2,317 [6],[7]            
Investments at fair value 2,368 [1],[2],[3]     2,351 [6],[7]            
Principal amount 2,863 [1],[2],[3],[5]     2,843 [6],[7],[10]            
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., Subordinated 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 311 [2],[12]     302 [6],[14]            
Investments at fair value 311 [2],[12]     302 [6],[14]            
Principal amount 311 [2],[5],[12]     302 [6],[10],[14]            
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., Subordinated 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 300 [2],[3]     291 [6],[7]            
Investments at fair value 300 [2],[3]     291 [6],[7]            
Principal amount 300 [2],[3],[5]     291 [6],[7],[10]            
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Ordinary shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 68,051 [2],[3]     66,651 [6],[7]            
Investments at fair value 59,136 [2],[3]     59,978 [6],[7]            
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Preferred shares                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,807 [2],[3]     7,525 [6],[7]            
Investments at fair value 7,808 [2],[3]     9,352 [6],[7]            
Investment, Identifier [Axis]: Tennessee Bidco Limited, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[15],[21]       19,326            
Investments at fair value [6],[7],[15],[21]       19,321            
Principal amount | £ [6],[7],[10],[15],[21]           £ 19,418        
Investment, Identifier [Axis]: Tennessee Bidco Limited, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [1],[2],[3] 19,564                  
Investments at fair value [1],[2],[3] 19,519                  
Principal amount | £ [1],[2],[3],[5]     £ 19,617              
Investment, Identifier [Axis]: TigerConnect, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 29,701 [1],[2],[3]     29,689 [6],[13],[14]            
Investments at fair value 29,868 [1],[2],[3]     29,868 [6],[13],[14]            
Principal amount 29,868 [1],[2],[3],[5]     29,868 [6],[10],[13],[14]            
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 2,724 [2],[8],[12]     2,440 [6],[9],[14]            
Investments at fair value 2,724 [2],[8],[12]     2,440 [6],[9],[14]            
Principal amount 2,724 [2],[5],[8],[12]     2,440 [6],[9],[10],[14]            
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[8],[12]     0 [6],[9],[14]            
Investments at fair value 0 [2],[8],[12]     0 [6],[9],[14]            
Principal amount 1,017 [2],[5],[8],[12]     1,301 [6],[9],[10],[14]            
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (43) [2],[3],[8]     (43) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 4,267 [2],[3],[5],[8]     4,267 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[8],[11],[12]     0 [6],[9],[13],[14]            
Investments at fair value 0 [2],[8],[11],[12]     0 [6],[9],[13],[14]            
Principal amount 95 [2],[5],[8],[11],[12]     785 [6],[9],[10],[13],[14]            
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (15) [2],[3],[8]     (15) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 1,501 [2],[3],[5],[8]     1,501 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 15,308 [2],[11],[12]     15,303 [6],[13],[14]            
Investments at fair value 15,382 [2],[11],[12]     15,382 [6],[13],[14]            
Principal amount 15,382 [2],[5],[11],[12]     15,382 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,440 [2],[11],[12]     4,438 [6],[13],[14]            
Investments at fair value 4,467 [2],[11],[12]     4,467 [6],[13],[14]            
Principal amount 4,467 [2],[5],[11],[12]     4,467 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[8],[11],[12] 687                  
Investments at fair value [2],[8],[11],[12] 690                  
Principal amount [2],[5],[8],[11],[12] 690                  
Investment, Identifier [Axis]: USRP Holdings, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (9) [2],[3],[8]     (9) [6],[7],[9]            
Investments at fair value 0 [2],[3],[8]     0 [6],[7],[9]            
Principal amount 893 [2],[3],[5],[8]     893 [6],[7],[9],[10]            
Investment, Identifier [Axis]: USRP Holdings, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,930 [1],[2],[3]     6,946 [6],[7],[15]            
Investments at fair value 6,966 [1],[2],[3]     6,984 [6],[7],[15]            
Principal amount 6,966 [1],[2],[3],[5]     6,984 [6],[7],[10],[15]            
Investment, Identifier [Axis]: USRP Holdings, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 5,499 [2],[11],[12]     5,512 [6],[13],[14]            
Investments at fair value 5,527 [2],[11],[12]     5,541 [6],[13],[14]            
Principal amount 5,527 [2],[5],[11],[12]     5,541 [6],[10],[13],[14]            
Investment, Identifier [Axis]: UniTek Global Services, Inc., Ordinary shares 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,925 [2],[12]     1,925            
Investments at fair value 0 [2],[12]     0            
Investment, Identifier [Axis]: UniTek Global Services, Inc., Ordinary shares 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 532 [2],[3]     532 [6],[7]            
Investments at fair value 0 [2],[3]     0 [6],[7]            
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 52,381 [2],[3]     22,803 [6],[7]            
Investments at fair value 45,347 [2],[3]     20,646 [6],[7]            
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 29,318 [2],[3]     13,553 [6],[7]            
Investments at fair value 21,388 [2],[3]     12,682 [6],[7]            
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 26,946 [2],[12]     19,795 [6],[7],[49]            
Investments at fair value 0 [2],[12]     3,080 [6],[7],[49]            
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 4                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,447 [2],[3]     26,946 [14],[49]            
Investments at fair value 0 [2],[3]     0 [14],[49]            
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 5                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[49]       7,447            
Investments at fair value [6],[7],[49]       0            
Investment, Identifier [Axis]: UniTek Global Services, Inc., Second lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7]       15,608            
Investments at fair value [6],[7]       15,459            
Principal amount [6],[7],[10]       15,608            
Investment, Identifier [Axis]: UniTek Global Services, Inc., Second lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7]       6,919            
Investments at fair value [6],[7]       6,853            
Principal amount [6],[7],[10]       6,919            
Investment, Identifier [Axis]: UniTek Global Services, Inc., Warrants                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7]       0            
Investments at fair value [6],[7]       48,804            
Investment, Identifier [Axis]: Viper Bidco,Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Principal amount 15,503                  
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 15,142 [1],[2],[3],[44]     15,181 [6],[7],[15],[45]            
Investments at fair value 15,425 [1],[2],[3],[44]     14,981 [6],[7],[15],[45]            
Principal amount 12,000 [1],[2],[3],[5],[44]     12,030 [6],[7],[10],[15],[45]            
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 0 [2],[3],[8]     0 [6],[7],[9]            
Investments at fair value (21) [2],[3],[8]     0 [6],[7],[9]            
Principal amount 4,150 [2],[3],[5],[8]     4,150 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (17) [2],[3],[8]     (17) [6],[7],[9]            
Investments at fair value (17) [2],[3],[8]     (17) [6],[7],[9]            
Principal amount 3,320 [2],[3],[5],[8]     3,320 [6],[7],[9],[10]            
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Principal amount       15,057            
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [6],[7],[9]       (6)            
Investments at fair value [6],[7],[9]       0            
Principal amount [6],[7],[9],[10]       2,040            
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 15,527 [2],[11],[12]     15,565 [6],[13],[14]            
Investments at fair value 15,553 [2],[11],[12]     15,593 [6],[13],[14]            
Principal amount 15,553 [2],[5],[11],[12]     15,593 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 11,858 [1],[2],[3]     11,887 [6],[7],[15]            
Investments at fair value 11,878 [1],[2],[3]     11,908 [6],[7],[15]            
Principal amount 11,878 [1],[2],[3],[5]     11,908 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 6,627 [2],[11],[12]     6,644 [6],[13],[14]            
Investments at fair value 6,642 [2],[11],[12]     6,659 [6],[13],[14]            
Principal amount 6,642 [2],[5],[11],[12]     6,659 [6],[10],[13],[14]            
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 4                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 1,219 [1],[2],[3]     1,221 [6],[7],[15]            
Investments at fair value 1,225 [1],[2],[3]     1,228 [6],[7],[15]            
Principal amount 1,225 [1],[2],[3],[5]     1,228 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 5                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 817 [1],[2],[3]     819 [6],[7],[15]            
Investments at fair value 822 [1],[2],[3]     824 [6],[7],[15]            
Principal amount 822 [1],[2],[3],[5]     824 [6],[7],[10],[15]            
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, LLC, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [2],[3],[8] (6)                  
Investments at fair value [2],[3],[8] 0                  
Principal amount [2],[3],[5],[8] 2,040                  
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, Subordinated                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 4,190 [2],[3]     4,185 [6],[7]            
Investments at fair value 4,235 [2],[3]     4,231 [6],[7]            
Principal amount 4,235 [2],[3],[5]     4,231 [6],[7],[10]            
Investment, Identifier [Axis]: Xactly Corporation, First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 22,484 [2],[16]     22,483 [6],[17]            
Investments at fair value 22,286 [2],[16]     22,250 [6],[17]            
Principal amount 22,500 [2],[5],[16]     22,500 [6],[10],[17]            
Investment, Identifier [Axis]: Xactly Corporation, First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (10) [2],[3],[8]     (10) [6],[7],[9]            
Investments at fair value (9) [2],[3],[8]     (11) [6],[7],[9]            
Principal amount 992 [2],[3],[5],[8]     992 [6],[7],[9],[10]            
Investment, Identifier [Axis]: YLG Holdings, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 21,799 [2],[27]     21,798 [6],[28]            
Investments at fair value 21,825 [2],[27]     21,825 [6],[28]            
Principal amount 21,825 [2],[5],[27]     21,825 [6],[10],[28]            
Investment, Identifier [Axis]: e Research Technology, Inc., First lien - Undrawn 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [3],[8] (9)                  
Investments at fair value [3],[8] (9)                  
Principal amount [3],[5],[8] 1,889                  
Investment, Identifier [Axis]: e Research Technology, Inc., First lien - Undrawn 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [3],[8] 0                  
Investments at fair value [3],[8] (11)                  
Principal amount [3],[5],[8] 2,040                  
Investment, Identifier [Axis]: e Research Technology, Inc., First lien - Undrawn 3                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [3],[8] (11)                  
Investments at fair value [3],[8] (11)                  
Principal amount [3],[5],[8] 1,074                  
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [3] 11,266                  
Investments at fair value [3] 11,266                  
Principal amount [3],[5] 11,380                  
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost [3],[8] 96                  
Investments at fair value [3],[8] 107                  
Principal amount [3],[5],[8] 107                  
Investment, Identifier [Axis]: iCIMS, Inc., First lien - Drawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 390 [2],[3],[8]     705 [6],[7],[9]            
Investments at fair value 383 [2],[3],[8]     701 [6],[7],[9]            
Principal amount 388 [2],[3],[5],[8]     706 [6],[7],[9],[10]            
Investment, Identifier [Axis]: iCIMS, Inc., First lien - Undrawn                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost (27) [2],[3],[8]     (25) [6],[7],[9]            
Investments at fair value (41) [2],[3],[8]     (21) [6],[7],[9]            
Principal amount 3,142 [2],[3],[5],[8]     2,824 [6],[7],[9],[10]            
Investment, Identifier [Axis]: iCIMS, Inc., First lien 1                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 44,549 [2],[11],[12]     44,537 [6],[13],[14]            
Investments at fair value 44,151 [2],[11],[12]     44,406 [6],[13],[14]            
Principal amount 44,742 [2],[5],[11],[12]     44,742 [6],[10],[13],[14]            
Investment, Identifier [Axis]: iCIMS, Inc., First lien 2                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Cost 7,323 [2],[11],[12]     7,321 [6],[13],[14]            
Investments at fair value 7,269 [2],[11],[12]     7,311 [6],[13],[14]            
Principal amount $ 7,366 [2],[5],[11],[12]     $ 7,366 [6],[10],[13],[14]            
[1] 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
[2] 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.
[3] Investment is held by New Mountain Finance Corporation
[4] 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 March 31, 2025, 14.2% of the Company’s total assets are represented by investments at fair value that are considered non-qualifying assets.
[5] Par amount is denominated in United States Dollar unless otherwise noted, which may include British Pound ("£") and/or Euro ("€").
[6] 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.
[7] Investment is held by New Mountain Finance Corporation
[8] Par value amounts represent the drawn or undrawn (as indicated in type of investment) portion of revolving credit facilities 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.
[9] Par value amounts represent the drawn or undrawn (as indicated in type of investment) portion of revolving credit facilities 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.
[10] Par amount is denominated in United States Dollar unless otherwise noted, which may include British Pound ("£") and/or Euro ("€").
[11] 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.
[12] Investment is held by New Mountain Finance Holdings, L.L.C.
[13] 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.
[14] Investment is held by New Mountain Finance Holdings, L.L.C.
[15] 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
[16] Investment is held by New Mountain Finance SBIC, L.P.
[17] Investment is held by New Mountain Finance SBIC, L.P.
[18] 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.
[19] 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.
[20] Total Coupon is payable in cash unless otherwise indicated. A majority of the variable rate debt investments bear interest and dividends at a rate that may be determined by reference to the Secured Overnight Financing Rate (SOFR), the Prime Rate (P), the Sterling Overnight Interbank Average Rate (SONIA) and Euro Interbank Offered Rate (EURIBOR) and which resets daily (D), monthly (M), quarterly (Q), semi-annually (S) or annually (A). For each investment the current coupon rate provided reflects the rate in effect as of December 31, 2024.
[21] 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, 2024, 14.6% of the Company’s total assets are represented by investments at fair value that are considered non-qualifying assets.
[22] 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.
[23] Investment is on non-accrual status. See Note 3. Investments, for details.
[24] Investment is held by NMF Ancora Holdings, Inc.
[25] Investment is held by NMF Ancora Holdings, Inc.
[26] The Company holds preferred equity in Bamboo Health Intermediate Holdings, Inc.(fka Appriss Health Intermediate Holdings, Inc.) and holds a first lien term loan and a first lien revolver in Bamboo Health Holdings, LLC (fka Appriss Health, LLC), a wholly-owned subsidiary of Bamboo Health Intermediate Holdings, Inc.
[27] Investment is held by New Mountain Finance SBIC II, L.P.
[28] Investment is held by New Mountain Finance SBIC II, L.P.
[29] 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.
[30] 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.
[31] 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.
[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.
[33] The Company holds ordinary shares and preferred equity in TVG-Edmentum Holdings, LLC, and subordinated notes in Edmentum Ultimate Holdings, LLC, a wholly-owned subsidiary of TVG-Edmentum Holdings, LLC.
[34] The Company holds ordinary shares in FS WhiteWater Holdings, LLC, and a first lien term loan, a first lien revolver, and three first lien delayed draws in FS WhiteWater Borrower, LLC, a partially-owned subsidiary of FS WhiteWater Holdings, LLC.
[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 a 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. .
[37] Investment is held by NMF HB, Inc.
[38] Investment is held by NMF HB, Inc.
[39] The Company holds preferred equity in Knockout Intermediate Holdings I Inc. and a first lien term loan, a first lien revolver and two first lien delayed draws in Kaseya, Inc., a wholly-owned subsidiary of Knockout Intermediate Holdings I Inc.
[40] 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%.
[41] 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%.
[42] Investment is held by New Mountain Net Lease Corporation.
[43] Investment is held by New Mountain Net Lease Corporation.
[44] Investment is denominated in foreign currency and is translated into U.S. dollars as of the valuation date. As of March 31, 2025, the par value U.S. dollar equivalent of the Viper Bidco, Inc. first lien term loans is $15,503 and the Nelipak Holding Company first lien term loan, undrawn delayed draw term loan, undrawn revolver and drawn revolver is $17,830, $6,935, $1,068 and $226, respectively. See Note 2. Summary of Significant Accounting Policies, for details
[45] Investment is denominated in foreign currency and is translated into U.S. dollars as of the valuation date. As of December 31, 2024, the par value U.S. dollar equivalent of the Viper Bidco, Inc. first lien term loans is $15,057 and the Nelipak Holding Company first lien term loan, drawn revolver, undrawn delayed draw term loan and undrawn revolver is $17,109, $406 $6,638 and $833, respectively. See Note 2. Summary of Significant Accounting Policies, for details.
[46] The Company holds ordinary shares in OA Topco, L.P., and three first lien term loans and a first lien revolver in OA Buyer, Inc., a wholly-owned subsidiary of OA Topco, L.P.
[47] The Company holds ordinary shares in OA Topco, L.P., and three first lien term loans and a first lien revolver in OA Buyer, Inc., a wholly-owned subsidiary of OA Topco, L.P.
[48] 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 March 31, 2025. See Note 2. Summary of Significant Accounting Policies, for details.
[49] Investment is on non-accrual status. See Note 3. Investments, for details.
[50] 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, 2024. See Note 2. Summary of Significant Accounting Policies, for details.
[51] Investment is held by NMF Permian Holdings, LLC.
[52] Investment is held by NMF Permian Holdings, LLC.
[53] The Company holds ordinary shares in Pioneer Topco I, L.P., and two first lien term loans and a first lien revolver in Pioneer Buyer I, LLC, a wholly-owned subsidiary of Pioneer Topco I, L.P.
[54] The Company holds ordinary shares in Pioneer Topco I, L.P., and two first lien term loans and a first lien revolver in Pioneer Buyer I, LLC, a wholly-owned subsidiary of Pioneer Topco I, L.P.
[55] Investment is held by NMF Pioneer, Inc.
[56] Investment is held by NMF Pioneer, Inc.