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Derivative Financial Instruments (Gains And Losses On Foreign Currency Forwards Included In Other Income Or Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Mar. 31, 2018
Apr. 01, 2017
Derivative Instrument Detail [Abstract]        
Net gain (loss) $ (2,381) $ (493) $ (3,009) $ 901