Loans And Allowance For Loan Losses (Summary Of Loans In The Personal Banking Portfolio Percentage Of Balances Outstanding ) (Details)	Jun. 30, 2012	Dec. 31, 2011
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Real Estate - Personal [Member] | Under 600 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	3.00%	3.40%
Real Estate - Personal [Member] | 600 - 659 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	4.20%	4.10%
Real Estate - Personal [Member] | 660 - 719 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	11.70%	12.20%
Real Estate - Personal [Member] | 720 - 780 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	30.20%	29.20%
Real Estate - Personal [Member] | Over 780 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	50.90%	51.10%
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Consumer [Member] | Under 600 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	7.40%	8.40%
Consumer [Member] | 600 - 659 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	11.30%	11.00%
Consumer [Member] | 660 - 719 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	24.10%	23.20%
Consumer [Member] | 720 - 780 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	25.80%	26.00%
Consumer [Member] | Over 780 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	31.40%	31.40%
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Revolving Home Equity [Member] | Under 600 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	2.40%	2.60%
Revolving Home Equity [Member] | 600 - 659 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	5.70%	4.90%
Revolving Home Equity [Member] | 660 - 719 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	16.20%	15.10%
Revolving Home Equity [Member] | 720 - 780 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	29.70%	26.30%
Revolving Home Equity [Member] | Over 780 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	46.00%	51.10%
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%	100.00%
Consumer Credit Card [Member] | Under 600 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	4.70%	4.90%
Consumer Credit Card [Member] | 600 - 659 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	11.60%	11.20%
Consumer Credit Card [Member] | 660 - 719 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	32.30%	31.00%
Consumer Credit Card [Member] | 720 - 780 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	28.40%	29.00%
Consumer Credit Card [Member] | Over 780 [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	23.00%	23.90%