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Derivative Financial Instruments (Details 2) - Foreign exchange contracts - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Other Current Assets    
Derivatives [Line Items]    
Carrying amount of derivative asset $ 2,369 $ 767
Other Current Liabilities    
Derivatives [Line Items]    
Carrying amount of derivative liability $ 75 $ 1,314