Employee Benefits And Deferred Compensation Plans (Schedule Of Assumptions Used, SERP) (Details) (Supplemental Executive Retirement Plans [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Executive Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate for projected benefit obligation	3.30%	4.15%	3.17%
Discounted rate for net periodic pension cost	4.15%	3.17%	4.34%
Salary scale	3.50%	3.50%	3.50%