Fair Value Measurements (Information Regarding Quantitative Inputs Used To Value Assets Classified As Level 3) (Details) - Significant Unobservable Inputs (Level 3) [Member] - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value	$ 2,523	$ 2,830
Impaired Loans [Member] \| Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	10.00%	10.00%
Discount for lack of marketability and age of appraisal	2.00%	25.00%
Impaired Loans [Member] \| Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	0.00%	5.00%
Discount for lack of marketability and age of appraisal	0.00%	0.00%
Impaired Loans [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	8.00%	6.00%
Discount for lack of marketability and age of appraisal	6.00%	15.00%
OREO [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value	$ 2,650	$ 2,370
OREO [Member] \| Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	10.00%	10.00%
Discount for lack of marketability and age of appraisal	25.00%	25.00%
OREO [Member] \| Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	0.00%	5.00%
Discount for lack of marketability and age of appraisal	0.00%	0.00%
OREO [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	6.00%	6.00%
Discount for lack of marketability and age of appraisal	15.00%	15.00%

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Adjustment to the discount rate used to measure fair value for lack of ability to convert business interests into cash quickly.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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