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Derivatives (Fair Value Of Derivative Instruments And Locations In Balance Sheets) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]    
Current derivative asset $ 4,047 $ 515
Non-current derivative asset 658 0
Current derivative liabilities 0 5,561
Not Designated as Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Current derivative asset 4,047 515
Non-current derivative asset 658 0
Total derivatives assets 4,705 515
Current derivative liabilities 0 5,561
Non-current derivative liabilities 0 0
Total derivative liabilities $ 0 $ 5,561