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Loans And Allowance For Loan Losses (Narrative) (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) item loan	Sep. 30, 2014 item	Dec. 31, 2014 USD ($) loan
Loans And Allowance For Loan Losses [Line Items]
Period of delinquency after which a loan is placed on non-accruals status	90 days
Loans charge off period	120 days
Loan returned to accrual status, performance required, months	6 months
Number of TDRs past due and classified as non-performing	5		7
Defaults on loans that had been modified as TDRs | item	0	0
Number of relationships to loans classified as troubled debt restructurings			9
Loans | $	$ 508,079		$ 455,734
Loans to relationships classified as TDRs, Total | $			1,449
TDRs past due and classified as non-performing, total amount | $	812		357
Accruing loans contractually past due 30 days or more, total amount | $	$ 0		$ 0
Residential Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships	5
Number of relationships to loans classified as troubled debt restructurings	5
Loans to relationships classified as TDRs, Total | $	$ 1,650
Maximum [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of appraised value of residential real estate loans	80.00%
Maximum [Member] | Commercial Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	20 years
Maximum [Member] | Residential Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	30 years
Minimum [Member] | Commercial Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	15 years
Minimum [Member] | Residential Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	10 years
Real Estate Secured Loans [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships	6		6
Number of relationships to loans classified as troubled debt restructurings	4
Loans to relationships classified as TDRs, Total | $	$ 963
Home Equity Loan [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships	1
Loans to relationships classified as TDRs, Total | $	$ 18
Agricultural And Other Loans To Farmers [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships	2		1
Number of relationships to loans classified as troubled debt restructurings	2
Loans to relationships classified as TDRs, Total | $	$ 108
Commercial And Industrial [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships	4		6
Number of relationships to loans classified as troubled debt restructurings	3
Loans | $	$ 77,888		$ 73,893
Loans to relationships classified as TDRs, Total | $	$ 140
Consumer Loans [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships	1		1
Loans to relationships classified as TDRs, Total | $	$ 9
Lodging Industry [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of commercial real estate mortgage portfolio	26.10%
Loans | $	$ 99,805		$ 112,520

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