Employee Benefit Plans (Schedule Of Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Benefit Plans [Abstract]
Annual increase in cost of benefits	7.00%	7.00%	7.00%
Discount rate used to determine year-end obligations	4.50%	4.50%	4.00%
Discount rate used to determine year-end expense	4.50%	4.50%	4.50%