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Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) item | Dec. 31, 2016 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |
Increase (decrease) in NOW, money market and savings | $ 307,987 | $ 295,948
Increase (decrease) in Noninterest bearing demand | $ 74,102 | 62,135
Maximum maturing period for cash and cash equivalents | 90 days |
Duration of loans interest stops accruing | 90 days |
Duration of consecutive payments before future payments assured | 6 months |
Duration of consumer term loans charged-off | 120 days |
Duration of consumer revolving credit loans charged-off | 180 days |
Impaired loans TDR | $ 440 | 455
Minimum principal loan balance for individual impairment test | 100,000 |
Unrecognized tax liabilities | $ 0 | 0
Number of Operating Segments | item | 1 |
Advertising expense | $ 739 | 686
Prior Period Restatments [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Increase (decrease) in NOW, money market and savings |  | 40,500
Increase (decrease) in Noninterest bearing demand |  | $ 40,500
Equipment [Member] | Maximum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Estimated useful life | 7 years |
Equipment [Member] | Minimum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Estimated useful life | 3 years |
Building and Building Improvements [Member] | Maximum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Estimated useful life | 39 years 6 months |
Building and Building Improvements [Member] | Minimum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Estimated useful life | 10 years |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition Amount of deposits in interest-bearing transaction accounts at banks or savings and loans, that are restricted in regard to ownership and can usually only be held by individuals, nonprofit entities and governments. Negotiable order of withdrawal accounts differ from money market demand accounts as they typically have higher reserve requirements and no limit on the number of checks that can be written. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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