Employee Benefit Plans (Defined Benefit Plan - Weighted Average Assumptions Used in Calculating Benefit Obligation) (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2015
Qualified Pension Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate		4.34%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.92%	4.34%
Expected return on plan assets	7.66%	7.31%
Post-retirement Healthcare Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate		3.77%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.98%	3.29%