Comprehensive Income (Loss) (Schedule Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (1,810)	$ (1,508)	$ (1,263)
Net Change	(614)	(302)	(245)
Ending Balance	(2,424)	(1,810)	(1,508)
Net Unrealized Gain (Loss) On Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	475	911	191
Net Change	(840)	(436)	720
Ending Balance	(365)	475	911
Net Defined Benefit Pension Plan Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,285)	(2,419)	(1,454)
Net Change	226	134	(965)
Ending Balance	$ (2,059)	$ (2,285)	$ (2,419)