Derivative Financial Instruments - Schedule of Derivative Financial Instruments at Gross Fair Value (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Sep. 30, 2019
Derivative [Line Items]
Gross Amount of Recognized Assets	$ 2,372
Gross Amount of Recognized Liabilities	1,684
Forward Contracts \| Designated as Hedging Instrument
Derivative [Line Items]
Gross Amount of Recognized Assets	1,453	$ 1,674
Gross Amount of Recognized Liabilities	0	0
Forward Contracts \| Not Designated as Hedging Instrument
Derivative [Line Items]
Fair Value of Derivatives Not Designated As Hedging Instruments	919	1,390
Fair Value of Derivatives Not Designated As Hedging Instruments	$ 1,684	$ 2,771

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments.

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