Retirement Plans (Weighted-Average Assumption Used To Determine Benefit Obligation) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (in hundredths)	4.10%	4.60%
Rate of compensation increase (in hundredths)	4.25%	4.25%
Health care cost trend rate [Abstract]
Initial rate (in hundredths)	0.00%	0.00%
Ultimate rate (in hundredths)	0.00%	0.00%
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (in hundredths)	4.10%	4.60%
Rate of compensation increase (in hundredths)	0.00%	0.00%
Health care cost trend rate [Abstract]
Initial rate (in hundredths)	0.00%	0.00%
Ultimate rate (in hundredths)	0.00%	0.00%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (in hundredths)	4.10%	4.60%
Rate of compensation increase (in hundredths)	0.00%	0.00%
Health care cost trend rate [Abstract]
Initial rate (in hundredths)	7.50%	7.50%
Ultimate rate (in hundredths)	5.00%	5.00%
Years to ultimate	2017	2017