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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] - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Derivatives designated as cash flow hedges:        
Gain (loss) recorded in other comprehensive income (loss) $ (129) $ (578) $ (656) $ (681)
Gain (loss) reclassified from other comprehensive income (loss) into net income (loss) (65) (342) (183) (652)
Forward Currency Contracts [Member]        
Derivatives designated as cash flow hedges:        
Gain (loss) recorded in other comprehensive income (loss) (129) (578) (656) (681)
Gain (loss) reclassified from other comprehensive income (loss) into net income (loss) $ (65) $ (342) $ (183) $ (652)