Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details) - Fair Value, Measurements, Nonrecurring [Member] $ in Thousands	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	$ 14,616	$ 843
Other Real Estate Owned, Fair Value Disclosure	1,240	625
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	14,616	843
Other Real Estate Owned, Fair Value Disclosure	1,240	625
Collateral Pledged [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	$ 14,616	715
Collateral Pledged [Member] \| Valuation, Market Approach [Member] \| Impaired Loans [Member] \| Minimum [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input	0.0000
Collateral Pledged [Member] \| Valuation, Market Approach [Member] \| Impaired Loans [Member] \| Maximum [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input	0.5451
Collateral Pledged [Member] \| Valuation, Market Approach [Member] \| Impaired Loans [Member] \| Weighted Average [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input	0.0666
Uncollateralized [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans		$ 128
Uncollateralized [Member] \| Valuation, Market Approach [Member] \| Impaired Loans [Member] \| Minimum [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input		0.0000
Uncollateralized [Member] \| Valuation, Market Approach [Member] \| Impaired Loans [Member] \| Maximum [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input		0.0000
Uncollateralized [Member] \| Valuation, Market Approach [Member] \| Impaired Loans [Member] \| Weighted Average [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input		0.0775

Fair Value, Inputs, Level 3 [Member]

Collateral Pledged [Member] | Fair Value, Inputs, Level 3 [Member]

Collateral Pledged [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]

Collateral Pledged [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]

Collateral Pledged [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]

Uncollateralized [Member] | Fair Value, Inputs, Level 3 [Member]

Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]

Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]

Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]