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Derivative Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019	Sep. 30, 2019
Gross Amount of Recognized Liabilities	$ 4,074		$ 4,074
Gross Amount of Recognized Assets	2,708		2,708
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	2,500	$ 200	$ 2,600	$ 400
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer			3 months
Forward Contracts \| Not Designated as Hedging Instrument
Derivative, Remaining Maturity			7 months
Forward Contracts \| Designated as Hedging Instrument
Gross Amount of Recognized Liabilities	1,841		$ 1,841		$ 0
Gross Amount of Recognized Assets	$ 0		$ 0		$ 1,674
Net Investment Hedging \| Forward Contracts \| Designated as Hedging Instrument
Derivative, Remaining Maturity			3 months