Quarterly report [Sections 13 or 15(d)]

BORROWINGS - Schedule of Recurring Fair Value Measurements of Borrowings Using Significant Unobservable Level 3 Inputs (Details)

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BORROWINGS - Schedule of Recurring Fair Value Measurements of Borrowings Using Significant Unobservable Level 3 Inputs (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Mar. 31, 2026
Significant Unobservable Inputs (Level 3)          
Debt Instrument [Line Items]          
Credit Facility $ 299,800   $ 299,800   $ 23,946
Long-Term Debt          
Fair Value Measurements of Borrowings Using Significant Unobservable Inputs (Level 3) Reported in Consolidated Statements of Assets and Liabilities          
Beginning balance 157,600 $ 62,269 23,946 $ 0  
Borrowings 175,100 75,800 324,900 153,300  
Repayments (32,900) (40,100) (49,000) (55,600)  
Unrealized appreciation (depreciation) 0 84 (46) 353  
Ending balance $ 299,800 $ 98,053 $ 299,800 $ 98,053