Fair Value Of Assets And Liabilities (Summary Of Differences Between The Fair Value Carrying Amount Of Mortgages Held-For-Sale And Aggregate Unpaid Principal Amount) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	$ 21,808	$ 24,269
Fair value carrying amount less aggregate unpaid principal - Total loans	(8,878)	(10,993)
Nonaccrual loans	6,428	6,775
Fair value carrying amount less aggregate unpaid principal - Nonaccrual loans	(5,123)	(6,135)
Loans 90 days or more past due and still accruing	44	211
Fair value carrying amount less aggregate unpaid principal - Loans 90 days or more past due and still accruing	(131)	(120)
Aggregate unpaid principal
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	30,686	35,262
Nonaccrual loans	11,551	12,910
Loans 90 days or more past due and still accruing	$ 175	$ 331