Other (Income) Expense, Net (Schedule of Other (Income) Expense, Net) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Nonoperating Income (Expense) [Abstract]
Equity interest in the earnings of the JV	$ (11,221)	$ (10,788)	$ (32,763)	$ (29,644)
Rent income	(89)	(88)	(261)	(258)
Net loss (gain) on sales of assets and businesses	579	307	(19,470)	(565)
Net gain on investments in deferred compensation program	(3,243)	(511)	(2,110)	(4,905)
Gain on non-recurring matter related to a previous acquisition				(4,803)
Other components of net periodic pension and other postretirement benefit, excluding service cost and interest expense	(3,365)	(2,939)	(10,004)	(8,805)
Other	(525)	(419)	(1,147)	(481)
Other (income) expense, net	$ (17,864)	$ (14,438)	$ (65,755)	$ (49,461)

Amount of defined benefit plan cost (credit), classified as other.

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Amount of income (expense) related to nonoperating activities, classified as other.

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Cash outflow representing an adjustment to the purchase price of a previous acquisition.

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Income earned by providing the use of assets to an outside party in exchange for a payment or series of payments that is nonoperating in nature.

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Net loss (gain) on investments in deferred compensation program.

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The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement and are not individually material for disclosure in the notes.

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