Loans And Allowance For Loan Losses (Outstanding Balance Of Loans Classified As Troubled Debt Restructurings) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	$ 94,873
Balance 90 days past due at any time during previous 12 months	17,799
Commercial [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	22,586
Commercial [Member] | Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	38,439
Balance 90 days past due at any time during previous 12 months	9,506
Commercial [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	8,216
Balance 90 days past due at any time during previous 12 months	1,595
Personal Banking [Member] | Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	3,164
Personal Banking [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	22,468
Balance 90 days past due at any time during previous 12 months	$ 6,698