Income Taxes (Summary Of Effective Income Tax Rate And The Federal Statutory Income Tax Rate) (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Abstract]      
Statutory tax rate 35.00% 35.00% 34.00%
Low-income housing credits (0.50%) (0.90%) (1.80%)
Tax-exempt interest income (5.10%) (6.30%) (7.50%)
Bank owned life insurance income (1.50%) (1.70%) (1.70%)
State income taxes, net of federal tax benefit 1.30% 1.20% 1.10%
Other, net (0.80%) (0.30%) 0.70%
Effective income tax rate 28.40% 27.00% 24.80%