Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Tax provision at statutory rate, Amount	$ 5,334	$ 3,466	$ 3,947
Tax-exempt income, Amount	(589)	(522)	(617)
Historic tax credit, Amount	(1,869)	(1,413)
State taxes, net of federal benefit, Amount	455	236	362
Deferred tax asset remeasurement, Amount	2,074
Other items, net, Amount	(196)	156	75
Total income tax provision	$ 5,209	$ 1,923	$ 3,767
Tax provision at statutory rate, Percent	34.00%	34.00%	34.00%
Tax-exempt income, Percent	(4.00%)	(5.00%)	(5.00%)
Historic tax credit, Percent	(12.00%)	(14.00%)
State taxes, net of federal benefit, Percent	2.00%	2.00%	3.00%
Deferred tax asset remeasurement, Percent	13.00%
Other items, net, Percent		2.00%
Income tax provision, Percent	33.00%	19.00%	32.00%