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
Dec. 31, 2024
Mar. 31, 2024
Debt Instrument [Line Items]    
Fair Value $ 1,072,230 $ 920,504 [1]
Collateral Pledged    
Debt Instrument [Line Items]    
Fair Value $ 847,300 $ 717,300
Credit Facility | Line of Credit    
Debt Instrument [Line Items]    
Unused fee percentage 0.75% 1.00%
Credit Facility | Revolving Line of Credit | Line of Credit    
Debt Instrument [Line Items]    
Debt instrument, variable rate floor 0.35% 0.35%
[1] Cumulative gross unrealized appreciation for federal income tax purposes is $180.5 million; cumulative gross unrealized depreciation for federal income tax purposes is $115.8 million. Cumulative net unrealized appreciation is $64.7 million, based on a tax cost of $855.8 million.