Loans And Allowance For Loan Losses (Total Average Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	$ 9,681	$ 14,406	$ 10,561	$ 14,265
Restructured loans (accruing)	98,954	50,545	98,495	49,324
Total	108,635	64,951	109,056	63,589
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	7,676	9,867	8,097	10,238
Restructured loans (accruing)	81,832	34,765	80,552	33,333
Total	89,508	44,632	88,649	43,571
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	2,005	4,539	2,464	4,027
Restructured loans (accruing)	17,122	15,780	17,943	15,991
Total	$ 19,127	$ 20,319	$ 20,407	$ 20,018