Employee Benefits And Deferred Compensation Plans (Schedule Of Defined Benefit Plans Disclosures, Employee Pension Plan) (Details) - Pension Benefits [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in benefit obligation:
Benefit obligation at the beginning of the year	$ 5,524	$ 5,384
Service cost
Interest cost	216	221	205
Assumption change	245	97
Actuarial (gain) loss	62	11
Benefits paid	(205)	(189)
Benefit obligation at the end of the year	5,842	5,524	5,384
Change in plan assets:
Fair value of plan assets at beginning of year	4,266	4,067
Actual return on plan assets	726	248
Employer contributions	1,000	140
Benefits paid	(205)	(189)
Fair value of plan assets at end of year	5,787	4,266	$ 4,067
Funded status	(55)	(1,258)
Accrued benefit liabilities	(55)	(1,258)
Net actuarial loss	2,192	2,429
Prior service cost
Net amount recognized in equity – pre-tax	2,192	2,429
Net amount recognized on Consolidated Balance Sheets in Other Liabilities	2,137	1,171
Accumulated benefit obligation at year end	$ 5,842	$ 5,524