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Derivatives - Narrative (Details) - Foreign Exchange Contract - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Designated as Hedging Instrument | Cash Flow Hedging      
Derivative [Line Items]      
Derivative, term of contract   12 months  
Notional Amount $ 4,515 $ 4,515 $ 12,600
Not Designated as Hedging Instrument, Economic Hedge      
Derivative [Line Items]      
Derivative, gain on derivative 500 1,000  
Not Designated as Hedging Instrument, Economic Hedge | Cash Flow Hedging      
Derivative [Line Items]      
Notional Amount $ 15,874 $ 15,874