Annual report pursuant to Section 13 and 15(d)

INVESTMENTS - Investments Classified by Contractual Maturity Date (Details)

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INVESTMENTS - Investments Classified by Contractual Maturity Date (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Sep. 30, 2022
 [2]
Investments, Debt and Equity Securities [Abstract]    
2024 $ 24,385  
2025 90,725  
2026 137,108  
2027 254,660  
2028 146,440  
Thereafter 7,762  
Total contractual repayments 661,080  
Adjustments to cost basis of debt investments (1,254)  
Investments in equity securities 62,443  
Investment owned, at cost 722,269 [1] $ 656,053
Debt investments with maturity dates prior to period end $ 200  
[1] Cumulative gross unrealized depreciation for federal income tax purposes is $56.9 million; cumulative gross unrealized appreciation for federal income tax purposes is $33.7 million. Cumulative net unrealized depreciation is $23.2 million, based on a tax cost of $728.0 million.
[2] Cumulative gross unrealized depreciation for federal income tax purposes is $52.3 million; cumulative gross unrealized appreciation for federal income tax purposes is $35.2 million. Cumulative net unrealized depreciation is $17.1 million, based on a tax cost of $666.7 million.