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Financial Instruments and Fair Value Measurements (Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)) (Details) - Designated as Hedging Instrument [Member] - Forward Currency Contracts [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Derivatives designated as cash flow hedges:    
Gain (loss) recorded in other comprehensive income (loss) $ 516 $ (494)
Gain (loss) reclassified from other comprehensive income (loss) into net income (loss) $ 29 $ (44)