Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill	$ 0	$ 0	$ 0
Aggregate amortization expense for intangible assets	1,300	1,500	$ 1,800
Goodwill [Member]
Finite-Lived Intangible Assets [Line Items]
Aggregate amortization expense for intangible assets	0	0
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Aggregate amortization expense for intangible assets	876	1,190
Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Recognized temporary impairment	9
Aggregate amortization expense for intangible assets	$ 462	$ 316