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Financial Instruments and Fair Value Measurements (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details) - Forward Currency Contracts [Member] - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Notional amounts $ 1,730 $ 1,647 [1]
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Notional amounts 16,660 22,208 [1]
Other Assets [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Cash flow hedges , other derivatives 3 474
Other Liabilities [Member] | Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Fair value of other derivatives (5) (9)
Other Liabilities [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Cash flow hedges , other derivatives $ (63) $ (84)
[1] Notional amounts represent the gross contract in U.S. dollars of the derivatives outstanding.