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Derivatives - Balance Sheet Location and Fair Value of Derivative Contracts (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Derivative [Line Items]    
Derivative assets $ 132 $ 146
Derivative liabilities (35) 0
Not Designated as Hedging Instrument | Foreign currency contracts | Accounts receivable, net    
Derivative [Line Items]    
Derivative assets 132 146
Not Designated as Hedging Instrument | Foreign currency contracts | Accrued and other current liabilities    
Derivative [Line Items]    
Derivative liabilities $ (35) $ 0