Fair Value Measurement (Schedule of Fair Value Measurements) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset (liabilities)	$ 494	$ (450)
Foreign Exchange Future [Member] | Recurring [Member] | Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	445	374
Derivative liabilities	(319)	(196)
Foreign Exchange Future [Member] | Recurring [Member] | Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	377
Derivative liabilities	$ (9)	$ (628)