XML 104 R86.htm IDEA: XBRL DOCUMENT v3.24.3
LOANS AND ALLOWANCE FOR LOAN LOSSES - Key assumptions used to estimate the fair value of the Mortgage Servicing Rights, Nonresidential servicing rights (Details) - USD ($)
12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Loans and Allowance for Loan Losses      
Total, Unpaid Principal Balance   $ 18,990,000 $ 16,071,000
Mortgage servicing rights      
Loans and Allowance for Loan Losses      
Total, Unpaid Principal Balance $ 0 4,770,000,000  
Revenue from Contract with Customer, Including Assessed Tax 1,500,000 9,500,000 9,000,000
Escrow balances maintained with foregoing loan servicing and other liabilities   47,900,000  
Nonresidential MSR      
Loans and Allowance for Loan Losses      
Total, Unpaid Principal Balance 35,000,000 40,400,000  
Revenue from Contract with Customer, Including Assessed Tax $ 8,000 $ 93,000 $ 92,000
Maximum | Mortgage servicing rights      
Loans and Allowance for Loan Losses      
Discount rate   14.50%  
Prepayment rate   85.82%  
Minimum | Mortgage servicing rights      
Loans and Allowance for Loan Losses      
Discount rate   9.44%  
Prepayment rate   5.00%  
Weighted Average | Mortgage servicing rights      
Loans and Allowance for Loan Losses      
Discount rate   9.51%  
Weighted Average | Nonresidential MSR      
Loans and Allowance for Loan Losses      
Prepayment rate   6.82%