Comprehensive Income (Loss) (Schedule Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (2,424)	$ (1,810)	$ (1,508)
Net Change	(362)	(614)	(302)
Net Change	(993)
Ending Balance	(3,417)	(2,424)	(1,810)
Net Unrealized Gain (Loss) On Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(365)	475	911
Net Change		(840)	(436)
Net Change	(684)
Ending Balance	(1,049)	(365)	475
Net Defined Benefit Pension Plan Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,059)	(2,285)	(2,419)
Net Change		226	134
Net Change	(309)
Ending Balance	$ (2,368)	$ (2,059)	$ (2,285)