Loans And Allowance For Loan Losses (Outstanding Balance Of Loans Classified As Troubled Debt Restructurings) (Details) $ in Thousands	Mar. 31, 2017 USD ($)
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	$ 54,269
Balance 90 days past due at any time during previous 12 months	1,230
Commercial Portfolio Segment [Member] | Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	30,546
Balance 90 days past due at any time during previous 12 months	0
Commercial Portfolio Segment [Member] | Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	546
Balance 90 days past due at any time during previous 12 months	0
Commercial Portfolio Segment [Member] | Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	5,844
Balance 90 days past due at any time during previous 12 months	0
Personal Banking Portfolio Segment [Member] | Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	4,037
Balance 90 days past due at any time during previous 12 months	422
Personal Banking Portfolio Segment [Member] | Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	5,336
Balance 90 days past due at any time during previous 12 months	34
Personal Banking Portfolio Segment [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	613
Balance 90 days past due at any time during previous 12 months	6
Personal Banking Portfolio Segment [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Restructured loans	7,347
Balance 90 days past due at any time during previous 12 months	$ 768