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Derivative Financial Instruments (Derivatives Not Designated as Cash Flow Hedges) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Sep. 30, 2022
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain	$ 215	$ (352)	$ 590	$ (41)
Significant Other Observable Inputs (Level 2) \| Fair Value, Measurements, Recurring \| Not Designated as Hedging Instrument \| Other Current Liabilities
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts	48		48		$ 0
Significant Other Observable Inputs (Level 2) \| Fair Value, Measurements, Recurring \| Total Return Swap \| Not Designated as Hedging Instrument \| Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	205		205		0
Significant Other Observable Inputs (Level 2) \| Fair Value, Measurements, Recurring \| Total Return Swap \| Not Designated as Hedging Instrument \| Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	0		0		632
Significant Other Observable Inputs (Level 2) \| Fair Value, Measurements, Recurring \| Foreign currency forward contracts \| Not Designated as Hedging Instrument \| Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 0		$ 0		$ 40