Loans And Allowance For Loan Losses (Total Average Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	$ 26,559	$ 31,011	$ 26,093	$ 34,257
Restructured loans (accruing)	46,072	33,222	45,476	37,421
Total	72,631	64,233	71,569	71,678
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	22,098	25,063	21,551	28,155
Restructured loans (accruing)	28,775	14,254	27,977	18,245
Total	50,873	39,317	49,528	46,400
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	4,461	5,948	4,542	6,102
Restructured loans (accruing)	17,297	18,968	17,499	19,176
Total	$ 21,758	$ 24,916	$ 22,041	$ 25,278