Income Taxes (Summary Of Differences Between Income Taxes At The Federal Statutory And Effective Tax Rate) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Taxes [Abstract]
Statutory tax rate	21.00%	21.00%	21.00%	21.00%
Increase (decrease) resulting from:
Restricted stock	(0.10%)	(1.60%)	(0.10%)	(0.90%)
Tax exempt income on bank owned life insurance	(0.20%)	(0.60%)	(0.30%)	(0.60%)
Low income housing credits	(0.50%)	(0.60%)	(0.50%)	(0.60%)
Other, net	0.30%	0.20%	0.20%	0.20%
Effective tax rate	20.50%	18.40%	20.30%	19.10%