Derivative Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Derivative, Notional Amount	$ 16,300
Foreign Exchange [Member]
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (750)	$ (1,438)	$ (569)