v3.26.1
FAIR VALUE DISCLOSURES - Schedule of Company’s Bank Owned Life Insurance is not a Marketable Asset and May Generally Only be Redeemed with the Insurance Company (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Sep. 30, 2025
Fair Value, Inputs, Level 1 [Member]    
Financial instruments - assets    
Investment securities held to maturity
Loan receivable net allowance for credit losses
Financial instruments - liabilities    
Certificates of deposit including retirement certificates
Borrowings
Fair Value, Inputs, Level 2 [Member]    
Financial instruments - assets    
Investment securities held to maturity 60,924 61,160
Loan receivable net allowance for credit losses
Financial instruments - liabilities    
Certificates of deposit including retirement certificates 234,927 210,168
Borrowings 48,488 48,576
Fair Value, Inputs, Level 3 [Member]    
Financial instruments - assets    
Investment securities held to maturity
Loan receivable net allowance for credit losses 889,267 855,377
Financial instruments - liabilities    
Certificates of deposit including retirement certificates
Borrowings
Carrying Value [Member]    
Financial instruments - assets    
Investment securities held to maturity 66,923 67,266
Loan receivable net allowance for credit losses 879,757 849,003
Financial instruments - liabilities    
Certificates of deposit including retirement certificates 236,210 209,948
Borrowings 49,054 49,054
Fair Value [Member]    
Financial instruments - assets    
Investment securities held to maturity 60,924 61,160
Loan receivable net allowance for credit losses 889,267 855,377
Financial instruments - liabilities    
Certificates of deposit including retirement certificates 234,927 210,168
Borrowings $ 48,488 $ 48,576