Derivative Instruments and Hedging Activities (Impact of Derivative Instruments on Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	$ (2,997)	$ (1,429)	$ 6,027	$ 44,377
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	(5,989)	9,389	5,172	44,073
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	$ (2,997)	(1,429)	$ 6,027	44,377
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		$ 2		$ 939
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		$ (42)		$ 875
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		$ 2		$ 939
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	$ (2,997)	$ (1,431)	$ 6,027	$ 43,438
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	$ (5,989)	$ 9,431	$ 5,172	$ 43,198
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	$ (2,997)	$ (1,431)	$ 6,027	$ 43,438