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Fair Value Measurements Fair Value Measurement, Measured On Non-Recurring Basis, Signfiicant Unobservable Inputs, Quantitative Information (Details) - Fair Value, Nonrecurring [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
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Discounted Cash Flow [Member] | Nonaccruing Loans [Member] | Management knowledge of industry and non-real estate collateral |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Assets, Fair Value Disclosure | $ 5,811 |  | $ 5,100 |
Discounted Cash Flow [Member] | Real estate and other repossessed assets [Member] | Marketability adjustments of appraised value |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Assets, Fair Value Disclosure | $ 1,582 |  |  |
Discounted Cash Flow [Member] | Real estate and other repossessed assets [Member] | Management knowledge of industry and non-real estate collateral |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Assets, Fair Value Disclosure |  |  | $ 0 |
Minimum [Member] | Nonaccruing Loans [Member] |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance | 33.00% | [1] | 36.00% | [2]
Minimum [Member] | Real estate and other repossessed assets [Member] |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Marketability Adjustment off Fair Value of OREO as Percentage of Unpaid Principal Balance [Member] | 0.98 |  |  |
Maximum [Member] | Nonaccruing Loans [Member] |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance | 68.00% | [1] | 36.00% | [2]
Maximum [Member] | Real estate and other repossessed assets [Member] |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Marketability Adjustment off Fair Value of OREO as Percentage of Unpaid Principal Balance [Member] | 0.98 |  |  |
Weighted Average [Member] | Nonaccruing Loans [Member] |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance | 68.00% | [1] | 36.00% | [2]
Weighted Average [Member] | Real estate and other repossessed assets [Member] |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Marketability Adjustment off Fair Value of OREO as Percentage of Unpaid Principal Balance [Member] | 0.98 |  |  |
[1] | Represents fair value as a percentage of the unpaid principal balance.
[2] | Represents fair value as a percentage of the unpaid principal balance.

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