Loans Receivable And Allowance For Loan Losses - Loan Modifications (Details) - USD ($) $ in Thousands |
9 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Extended Maturity | Home Equity and Second Mortgage | ||
| Financing Receivable, Troubled Debt Restructuring [Line Items] | ||
| Amortized Cost Basis | $ 54 | |
| % of Total Loan Type | 0.10% | |
| Loan extension term | 5 years | |
| Extended maturity and monthly payment reduction | Commercial business | ||
| Financing Receivable, Troubled Debt Restructuring [Line Items] | ||
| Amortized Cost Basis | $ 2 | $ 2 |
| % of Total Loan Type | 0.00% | 0.00% |
| Loan extension term | 7 months | |
| Period of payment reduction after signing | 18 months | 1 month 15 days |
| Extended maturity and deed secured | Commercial business | ||
| Financing Receivable, Troubled Debt Restructuring [Line Items] | ||
| Amortized Cost Basis | $ 256 | |
| % of Total Loan Type | 0.20% | |
| Loan extension term | 3 months | |