Derivative Instruments and Hedging Activities (Impact of Derivative Instruments on Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	$ 8,875	$ 7,620	$ 9,024	$ 45,806
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	(7,349)	2,096	11,161	34,684
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	$ (8,875)	7,620	$ 9,024	45,806
Floating-Rate Cross Currency Interest Rate Contract [Member] | Derivatives in Fair Value Hedging Relationships [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative		$ 36		$ 937
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, General and Administrative Expense	Selling, General and Administrative Expense	Selling, General and Administrative Expense	Selling, General and Administrative Expense
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative		$ 21		$ 917
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, General and Administrative Expense	Selling, General and Administrative Expense	Selling, General and Administrative Expense	Selling, General and Administrative Expense
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings		$ 36		$ 937
Fixed-Rate Cross Currency Interest Rate Contract [Member] | Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	$ 8,875	$ 7,584	$ 9,024	$ 44,869
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, General and Administrative Expense	Selling, General and Administrative Expense	Selling, General and Administrative Expense	Selling, General and Administrative Expense
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	$ (7,349)	$ 2,075	$ 11,161	$ 33,767
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, General and Administrative Expense	Selling, General and Administrative Expense	Selling, General and Administrative Expense	Selling, General and Administrative Expense
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	$ (8,875)	$ 7,584	$ 9,024	$ 44,869