Loans And Allowance For Loan Losses (Total Average Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	$ 11,451	$ 14,122
Restructured loans (accruing)	98,031	48,089
Total	109,482	62,211
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	8,523	10,613
Restructured loans (accruing)	79,258	31,885
Total	87,781	42,498
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	2,928	3,509
Restructured loans (accruing)	18,773	16,204
Total	$ 21,701	$ 19,713