Quarterly report pursuant to Section 13 or 15(d)

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

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BORROWINGS - 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, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Mar. 31, 2022
Debt Instrument [Line Items]          
Recurring Fair Value Measurements Reported in Consolidated Statements of Assets and Liabilities Using Significant Unobservable Inputs (Level 3) $ 16,600   $ 16,600   $ 0
Long-Term Debt          
Fair Value Measurements of Borrowings Using Significant Unobservable Inputs (Level 3) Reported in Consolidated Statements of Assets and Liabilities          
Beginning balance 0 $ 41,900 0 $ 22,400  
Borrowings 41,500 32,900 41,500 62,700  
Repayments (24,900) (65,900) (24,900) (76,200)  
Unrealized appreciation (depreciation) 0 0 0 0  
Ending balance $ 16,600 $ 8,900 $ 16,600 $ 8,900