Employee Benefit Plans (Weighted Average Assumptions Used In Determining Net Periodic Benefit Cost And Benefit Obligations) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	6.75%	7.25%	7.25%
Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate, Net periodic benefit cost	4.14%	3.82%	4.70%
Discount rate, Benefit obligations	3.88%	4.14%	3.82%
Nonqualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate, Net periodic benefit cost	3.87%	3.59%	4.30%
Discount rate, Benefit obligations	3.70%	3.87%	3.59%