Premises And Equipment (Premises And Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total cost	$ 39,756	$ 39,092
Less: Accumulated depreciation	(26,015)	(25,034)
Net premises and equipment	13,741	14,058
Land [Member]
Property, Plant and Equipment [Line Items]
Total cost	2,962	3,000
Building and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	24,347	24,190
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 12,447	$ 11,902
Maximum [Member] | Building and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated Life	30 years
Maximum [Member] | Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Life	10 years
Minimum [Member] | Building and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated Life	15 years
Minimum [Member] | Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Life	3 years