Derivative Instruments And Hedging Activities (Derivatives Not Designated As Hedging Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Asset derivatives not designated as hedging instruments	$ 69	$ 5,946
Liability derivatives not designated as hedging instruments		16,298
Foreign Exchange Contracts [Member]
Asset derivatives not designated as hedging instruments		100
Interest Rate Swaps [Member]
Liability derivatives not designated as hedging instruments		500
Other Current Assets [Member] | Oil Contract [Member]
Asset derivatives not designated as hedging instruments		5,800
Other Current Assets [Member] | Foreign Exchange Contracts [Member]
Asset derivatives not designated as hedging instruments	69	146
Accrued Liabilities [Member] | Oil Contract [Member]
Liability derivatives not designated as hedging instruments		15,777
Accrued Liabilities [Member] | Interest Rate Swaps [Member]
Liability derivatives not designated as hedging instruments		489
Other Liabilities [Member] | Interest Rate Swaps [Member]
Liability derivatives not designated as hedging instruments		$ 32