Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Fair Value Measurement (Schedule of Fair Value Measurements) (Details)

v3.19.1
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)