Loans And Allowance For Loan Losses (Interest Income Recognized on Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	$ 586	$ 599
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	263	274
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	1	2
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	62	36
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	37	46
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	82	90
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	6	5
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Interest income recognized	$ 135	$ 146