v3.26.3
FINANCIAL HIGHLIGHTS - Financial Highlights, Additional Information (Details) - $ / shares
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Investment Company, Financial Highlights [Line Items]        
Per share market value at end of period (in dollars per share) $ 19.10 $ 20.41 $ 20.23 $ 21.89
Total distributions to stockholders (in dollars per share) $ 1.44 $ 1.44    
Ratio of operating expenses to average net assets 11.32% 11.47%    
Base management fee        
Investment Company, Financial Highlights [Line Items]        
Ratio of operating expenses to average net assets 3.14% 3.04%    
Income based fee and capital gains incentive fee        
Investment Company, Financial Highlights [Line Items]        
Ratio of operating expenses to average net assets 1.61% 2.43%    
Interest and credit facility fees        
Investment Company, Financial Highlights [Line Items]        
Ratio of operating expenses to average net assets 6.17% 5.63%    
Other operating expenses        
Investment Company, Financial Highlights [Line Items]        
Ratio of operating expenses to average net assets 0.40% 0.37%