Employee Benefits And Deferred Compensation Plans (Schedule Of Defined Benefit Plans Disclosures, Employee Pension Plan) (Details) - Pension Plans [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Change in benefit obligation:
Benefit obligation at the beginning of the year	$ 5,384	$ 5,437
Service cost
Interest cost	221	205	206
Assumption change	97	(61)
Actuarial (gain) loss	11	(4)
Benefits paid	(189)	(193)
Benefit obligation at the end of the year	5,524	5,384	5,437
Change in plan assets:
Fair value of plan assets at beginning of year	4,067	4,201
Actual return on plan assets	248	(106)
Employer contributions	140	165
Benefits paid	(189)	(193)
Fair value of plan assets at end of year	4,266	4,067	$ 4,201
Funded status	(1,258)	(1,317)
Accrued benefit liabilities	(1,258)	(1,317)
Net actuarial loss	2,429	2,390
Prior service cost
Net amount recognized in equity – pre-tax	2,429	2,390
Net amount recognized on Consolidated Balance Sheets in Other Liabilities	1,171	1,073
Accumulated benefit obligation at year end	$ 5,524	$ 5,384