Quarterly report pursuant to Section 13 or 15(d)

DISTRIBUTIONS TO COMMON STOCKHOLDERS - Narrative (Details)

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DISTRIBUTIONS TO COMMON STOCKHOLDERS - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Oct. 31, 2024
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Mar. 31, 2024
Dividends Payable [Line Items]            
Investment company, cash distributions paid to common stockholders from ordinary income   51.00%   51.00%    
Investment company, cash distributions paid to common stockholders from capital gains   49.00%   49.00%    
Cash distributions to common stockholders       $ 43.3    
Payments of dividends       17.6 $ 24.3  
Investment company, distributions paid subsequent to fiscal year-end, classified in prior year, ordinary income           $ 18.7
Investment company, distribution paid subsequent to fiscal year-end, classified in prior year, capital gains           $ 1.4
Investment company, net adjustments for tax difference to capital distribution   $ 0.6 $ 0.5 $ 0.8 $ 0.1  
Subsequent Event            
Dividends Payable [Line Items]            
Payments of dividends $ 25.7