Employee Benefits (Weighted Average Assumptions Used to Calculate Net Period Benefit Costs- Retirement Plans) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Retirement Income Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected long-term return on plan assets	7.50%
Net Periodic Benefit Costs | Retirement Income Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	4.00%	4.30%	5.40%
Expected long-term return on plan assets	7.50%	7.50%	7.50%
Rate of compensation increase	4.75%	5.00%	5.00%
Net Periodic Benefit Costs | Supplement Retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	3.10%	3.60%	4.60%
Net Periodic Benefit Costs | Excess Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	4.00%	4.10%	5.30%
Rate of compensation increase	4.75%	5.00%	5.00%