Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS - Fair Value Narrative (Details)

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BORROWINGS - Fair Value Narrative (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Oct. 30, 2023
Apr. 10, 2023
Dec. 31, 2023
Mar. 31, 2023
Debt Instrument [Line Items]        
Fair Value     $ 902,808 $ 753,543 [1]
Collateral Pledged        
Debt Instrument [Line Items]        
Fair Value     $ 702,900 $ 639,500
Revolving Line of Credit | Line of Credit        
Debt Instrument [Line Items]        
Unused fee percentage       1.00%
Credit Facility | Line of Credit        
Debt Instrument [Line Items]        
Unused fee percentage     0.50%  
Credit Facility | Revolving Line of Credit | Line of Credit | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Debt instrument, variable rate floor 0.35%   0.35%  
Debt instrument, basis spread on variable rate   0.11% 3.25%  
Credit Facility | Revolving Line of Credit | Line of Credit | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, variable rate floor       0.50%
Debt instrument, basis spread on variable rate       2.94%
[1] Cumulative gross unrealized appreciation for federal income tax purposes is $150.4 million; cumulative gross unrealized depreciation for federal income tax purposes is $119.3 million. Cumulative net unrealized appreciation is $31.1 million, based on a tax cost of $722.4 million.