Bank Premises And Equipment (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Depreciation expense		$ 1.4	$ 1.3	$ 1.2
Rental expense		$ 0.3	$ 0.3	$ 0.2
Loan transferred from loans to foreclosed assets held-for-sale to bank premises, value	$ 1.0
Loan transferred from loans to foreclosed assets held-for-sale to bank premises, tenant lease agreement, expiration date		2018
Bank Premises [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		40 years
Furniture, Fixtures And Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		3 years
Furniture, Fixtures And Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		7 years