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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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