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Derivatives (Narrative) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Sep. 30, 2013
Dec. 31, 2012
Derivatives [Abstract]        
Unrealized gain (loss) on derivatives $ 35,000 $ 140,000    
Open forward positions     $ 0 $ 0