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Financial Instruments Financial Instruments (Details 2) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]          
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments $ (2,048) $ 1,418 $ (2,983,000) $ 727,000  
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value 690   690   719
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value $ (1,006)   $ (1,006)   $ (355)