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Derivative Instruments and Hedging Activities - Notional and Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019	Sep. 28, 2019
Derivatives, Fair Value [Line Items]
Loss on derivatives	$ 1,100	$ 900	$ 1,200	$ 5,800
Derivatives not designated as hedging instruments \| Purchase \| Euro
Derivatives, Fair Value [Line Items]
Derivative asset, notional amount	70,682		70,682		$ 53,920
Derivative asset, Fair Value	464		464		(117)
Derivatives not designated as hedging instruments \| Sell \| Euro
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount	(86,375)		(86,375)		(86,984)
Derivative liability, Fair Value	$ (720)		$ (720)		$ (473)