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Segment Information - Summary of Consolidated Earnings Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Interest expense, net	$ (41,500)	$ (41,501)	$ (45,147)
Consolidated earnings before income taxes	521,411	453,971	275,768
Operating Segments [Member]
Segment Reporting Information [Line Items]
Reportable segment operating profit	689,137	615,217	451,726
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Nonsegment expenses	$ (126,226)	$ (119,745)	$ (130,811)

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