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	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale (elected fair value)	$ 18,940	$ 20,881
Fair value carrying amount less aggregate unpaid principal - Total loans	(7,704)	(8,874)
Nonaccrual loans	4,674	5,783
Fair value carrying amount less aggregate unpaid principal - Nonaccrual loans	(4,156)	(5,098)
Loans 90 days or more past due and still accruing	34	0
Fair value carrying amount less aggregate unpaid principal - Loans 90 days or more past due and still accruing	(17)	0
Aggregate unpaid principal
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale (elected fair value)	26,644	29,755
Nonaccrual loans	8,830	10,881
Loans 90 days or more past due and still accruing	$ 51	$ 0