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Derivative Financial Instruments (Details 2) - Level 2 - Foreign currency forward contracts - Not Designated as Hedging Instrument - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Other current assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset $ 3,112 $ 112
Other current liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Fair Value, Gross Liability $ 70 $ 3,247