Derivative Financial Instruments - Schedule of Derivative Financial Instruments at Gross Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Designated as Hedging Instrument \| Forward Contracts
Derivative [Line Items]
Gross Amount of Recognized Assets	$ 2,470	$ 3
Gross Amount of Recognized Liabilities	0	306
Designated as Hedging Instrument \| Options
Derivative [Line Items]
Gross Amount of Recognized Assets	0	0
Not Designated as Hedging Instrument \| Forward Contracts
Derivative [Line Items]
Fair Value of Derivatives Not Designated As Hedging Instruments	3,414	900
Fair Value of Derivatives Not Designated As Hedging Instruments	4,259	767
Not Designated as Hedging Instrument \| Options
Derivative [Line Items]
Fair Value of Derivatives Not Designated As Hedging Instruments	$ 962	$ 0

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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- Definition

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.

+ References

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-Publisher FASB
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-Topic 860
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

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

+ References

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- Definition

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

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