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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. 30, 2019
Mar. 31, 2018
Mar. 30, 2019
Mar. 31, 2018
Other Income (Expense)        
Derivative        
Net gain (loss) $ 2,419 $ (2,381) $ 769 $ (3,009)