Derivative Instruments and Hedging Activities (Impact of Derivative Instruments on Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	$ (6,256)	$ (20,683)	$ (16,331)	$ 277
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	(12,411)	(8,892)	(24,780)	21,766
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	(6,256)	(20,683)	(16,331)	277
Floating-Rate Cross Currency Interest Rate Contract [Member] \| Derivatives in Fair Value Hedging Relationships [Member] \| Selling, General and Administrative Expenses [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	(297)	(1,660)	(919)	190
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	(557)	(1,401)	(1,057)	262
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	(297)	(1,660)	(919)	190
Fixed-Rate Cross Currency Interest Rate Contract [Member] \| Cash Flow Hedging \| Selling, General and Administrative Expenses [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	(5,959)	(19,023)	(15,412)	87
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	(11,854)	(7,491)	(23,723)	21,504
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	$ (5,959)	$ (19,023)	$ (15,412)	$ 87

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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Amount, before tax and adjustments, of gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method.

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