Loans And Allowance For Credit Losses (Average Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Financing Receivable, Impaired [Line Items]
Non-accrual loans	$ 11,996	$ 12,157
Restructured loans (accruing)	53,352	61,155
Average Impaired Loans, Total	65,348	73,312
Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	9,649	9,996
Restructured loans (accruing)	37,621	45,570
Average Impaired Loans, Total	47,270	55,566
Personal Banking Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	2,347	2,161
Restructured loans (accruing)	15,731	15,585
Average Impaired Loans, Total	$ 18,078	$ 17,746