Income Taxes (Summary Of Effective Income Tax Rate And The Federal Statutory Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Statutory tax rate	21.00%	21.00%	35.00%
Tax-exempt interest income	(0.80%)	(1.20%)	(2.60%)
Bank owned life insurance income	(1.10%)	(0.80%)	(1.60%)
State income taxes, net of federal tax benefit	2.00%	2.00%	1.60%
Other, net	0.20%	0.00%	0.20%
Change in enacted tax rate	0.00%	0.00%	12.60%
Effective income tax rate	21.30%	21.00%	45.20%