Employee Benefits (Recognized Net Periodic Benefit Costs and Other Comprehensive Income -Other Postretirement Benefit Plans) (Details) (Other Postretirement Benefit Plans, Defined Benefit, USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total recognized in net periodic benefit cost and other comprehensive income	$ (45,415,000)	$ 2,415,000	$ 41,061,000
Net Gain that Will be Amortized from Accumulated Other Comprehensive Income (Loss)	2,600,000
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)	$ 4,800,000