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Loans And Allowance For Loan Losses (Summary Of Troubled Debt Restructures) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) loan	Dec. 31, 2015 USD ($) loan	Dec. 31, 2014 USD ($) loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	13	10	2
Pre-Modification Outstanding Recorded Investment	$ 1,537	$ 1,795	$ 130
Post-Modification Outstanding Recorded Investment	$ 1,457	$ 1,800	$ 127
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	6	4	1
Pre-Modification Outstanding Recorded Investment	$ 1,459	$ 342	$ 30
Post-Modification Outstanding Recorded Investment	$ 1,354	$ 352	$ 30
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	2
Pre-Modification Outstanding Recorded Investment	$ 38
Post-Modification Outstanding Recorded Investment	$ 48
Agriculture And Other Loans To Farmers [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	3	1	1
Pre-Modification Outstanding Recorded Investment	$ 29	$ 18	$ 100
Post-Modification Outstanding Recorded Investment	$ 44	$ 15	$ 97
Commercial Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	11	5	2
Pre-Modification Outstanding Recorded Investment	$ 1,526	$ 360	$ 130
Post-Modification Outstanding Recorded Investment	$ 1,446	$ 367	$ 127
Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	2	5
Pre-Modification Outstanding Recorded Investment	$ 11	$ 1,435
Post-Modification Outstanding Recorded Investment	$ 11	$ 1,433
Consumer Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	2	5
Pre-Modification Outstanding Recorded Investment	$ 11	$ 1,435
Post-Modification Outstanding Recorded Investment	$ 11	$ 1,433

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

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Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

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