Derivative Instruments And Hedging Activities (Gain (Loss) Reclassified From Accumulated OCI Into Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ (1,476)	$ 2,661	$ (23,669)
Oil And Natural Gas Commodity Contracts [Member] | Income From Discontinued Operations Net Of Tax [Member]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		3,184	(21,659)
Interest Rate Swaps [Member] | Net Interest Expense [Member]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(152)	(523)	(2,010)
Foreign Exchange Contracts [Member] | Cost of Sales [Member]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ (1,324)