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Derivative Financial Instruments (Schedule of Derivatives not Designated as Hedging Instruments) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2019
Sep. 30, 2018
Sep. 29, 2019
Sep. 30, 2018
Other income (expense), net | Foreign currency contracts | Derivatives Not Designated as Hedging Instruments        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) on cash flow hedge $ 665 $ (57) $ 521 $ (57)