Employee Benefit Plans (Schedule Of Assumptions Used To Develop Periodic Expense) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate - Retirement Plan	4.19%	5.30%	5.82%
Salary scale increases	3.50%	4.00%	4.00%
Long-term rate of return on assets - Retirement Plan	8.00%	8.00%	8.00%
Supplemental Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Salary scale increases	0.00%	5.00%	5.00%