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FINANCIAL HIGHLIGHTS - Schedule of Financial Highlights, Additional Information (Details) - $ / shares
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Investment Company, Financial Highlights [Line Items]        
Per share market value at end of period (in dollars per share) $ 20.82 $ 18.27 $ 20.03 $ 18.47
Total distributions to stockholders (in dollars per share) $ 0.48 $ 0.48    
Ratio of operating expenses to average net assets 12.79% 12.31%    
Base management fee        
Investment Company, Financial Highlights [Line Items]        
Ratio of operating expenses to average net assets 3.03% 3.27%    
Income based fee and capital gains incentive fee        
Investment Company, Financial Highlights [Line Items]        
Ratio of operating expenses to average net assets 3.91% 2.88%    
Interest and credit facility fees        
Investment Company, Financial Highlights [Line Items]        
Ratio of operating expenses to average net assets 5.52% 5.77%    
Other operating expenses        
Investment Company, Financial Highlights [Line Items]        
Ratio of operating expenses to average net assets 0.33% 0.39%