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DERIVATIVE INSTRUMENTS - CREDIT RISK EXPOSURE (Details)
$ in Thousands
9 Months Ended
Jun. 30, 2024
USD ($)
Credit Risk Exposure [Line Items]  
Gross Credit Exposure $ 152,759
Investment grade  
Credit Risk Exposure [Line Items]  
Gross Credit Exposure 108,200
Noninvestment grade  
Credit Risk Exposure [Line Items]  
Gross Credit Exposure 9,074
Internally rated investment grade  
Credit Risk Exposure [Line Items]  
Gross Credit Exposure 17,858
Internally rated noninvestment grade  
Credit Risk Exposure [Line Items]  
Gross Credit Exposure $ 17,627