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Financial Instruments and Fair Value Measurements (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Financial assets carried at fair value:    
Forward currency asset contracts $ 669  
Total financial assets carried at fair value 669  
Financial liabilities carried at fair value:    
Forward currency liabilities contracts   $ 269
Earn-out consideration 20,002 20,746
Total financial liabilities carried at fair value 20,002 $ 21,015
Fair Value, Inputs, Level 2 [Member]    
Financial assets carried at fair value:    
Forward currency asset contracts 669  
Total financial assets carried at fair value 669  
Fair Value, Inputs, Level 3 [Member]    
Financial liabilities carried at fair value:    
Earn-out consideration 20,002  
Total financial liabilities carried at fair value $ 20,002