Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Summary of Changes in the Fair Value of the Plans' Level 3 Assest) (Details) (Hedge Funds [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Hedge Funds [Member]
Asset balance	$ 10,579	$ 45,693	$ 42,940
Sales and settlements	(34,500)	0
Unrealized gain (losses) relating to assets still held at the reporting date	$ (614)	$ 2,753