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Derivatives - Fair Value by Balance Sheet Location (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Derivative [Line Items]    
Derivative asset $ 146 $ 210
Foreign currency contracts | Not Designated as Hedging Instrument | Accounts receivable, net    
Derivative [Line Items]    
Derivative asset $ 146 $ 210