Nature of Banking Activities and Significant Accounting Policies (Components Of Change In Unrealized Gains (Losses) On Securities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Gross unrealized gain (loss)	$ (564)	$ 2,382	$ (4,497)
Reclassification adjustment for realized (gain)	(124)	(990)	(465)
Net unrealized gain (loss) before taxes	(688)	1,392	(4,962)
Tax effect	234	(473)	1,687
Net unrealized gain (loss) after taxes	$ (454)	$ 919	$ (3,275)