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Off-Balance Sheet Financial Instruments (Schedule of Fair Value, Off-balance Sheet Risks) (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Loss Contingencies [Line Items] |  |
Financial instrument commitments | $ 247,325 | $ 261,317
Commitments to Grant Loans [Member] |  |
Loss Contingencies [Line Items] |  |
Financial instrument commitments | 84,905 | 93,685
Unfunded Commitments Under Lines of Credit [Member] |  |
Loss Contingencies [Line Items] |  |
Financial instrument commitments | 156,585 | 160,659
Standby Letters of Credit [Member] |  |
Loss Contingencies [Line Items] |  |
Financial instrument commitments | $ 5,835 | $ 6,973

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