Derivative Instruments And Hedging Activities (Impact Of Non Designated Derivative Instruments On Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Gain (Loss) Recognized in Income on Derivatives	$ 53	$ (69)	$ (15,390)	$ 164
Foreign Exchange Contracts [Member] | Other Expense [Member]
Gain (Loss) Recognized in Income on Derivatives	53	(69)	(1,191)	164
Oil And Natural Gas Commodity Contracts [Member] | Non Hedge Loss On Commodity Derivative Contracts [Member]
Gain (Loss) Recognized in Income on Derivatives			(14,113)
Interest Rate Swaps [Member] | Other Expense [Member]
Gain (Loss) Recognized in Income on Derivatives			$ (86)