Employee Benefit Plans (Schedule Of Assumptions Used To Develop The Actuarial Present Value Of The Benefit Obligations) (Details)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Discount rate	4.01%	4.11%	3.83%
Salary scale increases	3.50%	3.50%	3.50%