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Derivative Instruments and Hedging Activities - Notional and Fair Value (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 03, 2020
Sep. 28, 2019
Derivatives, Fair Value [Line Items]    
Forward contracts period of maturities 2 months  
Purchase | Derivatives not designated as hedging instruments | Euro    
Derivatives, Fair Value [Line Items]    
Derivative asset, notional amount $ 169,206 $ 53,920
Derivative asset, fair value (1,802) (117)
Sell | Derivatives not designated as hedging instruments | Euro    
Derivatives, Fair Value [Line Items]    
Derivative liability, notional amount (166,813) (86,984)
Derivative liability, fair value $ (197) $ (473)