Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS - Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details)

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BORROWINGS - Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Significant Unobservable Inputs (Level 3) - Fair Value, Recurring - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Mar. 31, 2023
Debt Instrument [Line Items]          
Recurring Fair Value Measurements Reported in Consolidated Statements of Assets and Liabilities Using Significant Unobservable Inputs (Level 3) $ 79,208   $ 79,208   $ 35,171
Long-Term Debt          
Fair Value Measurements of Borrowings Using Significant Unobservable Inputs (Level 3) Reported in Consolidated Statements of Assets and Liabilities          
Beginning balance 46,160 $ 0 35,171 $ 0  
Borrowings 95,200 41,500 127,000 41,500  
Repayments (62,100) (24,900) (82,900) (24,900)  
Unrealized appreciation (depreciation) (52) 0 (63) 0  
Ending balance $ 79,208 $ 16,600 $ 79,208 $ 16,600