Other Income, Net (Schedule of Other Income, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Equity interest in the earnings of the JV	$ (45,850)	$ (41,191)	$ (36,846)
Net (gain) loss on sales of assets and businesses	(18,731)	(457)	1,491
Gain on non-recurring matter related to a previous acquisition		(4,803)
Rent income	(355)	(347)	(360)
Net gain on investments in deferred compensation program	(4,151)	(6,571)	(3,265)
Other components of net periodic pension and other postretirement benefit, excluding service cost and interest expense	(13,375)	(11,764)	(10,547)
Other	(1,548)	(2,035)	(764)
Other income, net	$ (84,010)	$ (67,168)	$ (50,291)

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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