Quarterly report pursuant to Section 13 or 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
Jun. 30, 2023
Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]    
2023 $ 4,806  
2024 28,818  
2025 86,790  
2026 160,943  
2027 241,385  
Thereafter 151,330  
Total contractual repayments 674,072  
Adjustments to cost basis of debt investments (1,333)  
Investments in equity securities 62,443  
Investment owned, at cost 735,182 $ 656,053
Debt investments with maturity dates prior to period end $ 200