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Goodwill Other Intangible Assets and Other Long Term Assets - Summary of Changes in Carrying Amount of Goodwill by Reportable Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Goodwill [Line Items]
Beginning balance	$ 592,293	$ 559,820
Goodwill acquired	680	29,335
Foreign currency translation	3,013	3,138
Goodwill impairment	(69,055)
Ending balance	526,931	592,293
Retail Operations [Member]
Goodwill [Line Items]
Beginning balance	523,238	490,765
Goodwill acquired	680	29,335
Foreign currency translation	3,013	3,138
Ending balance	526,931	523,238
Product Manufacturing [Member]
Goodwill [Line Items]
Beginning balance	69,055	69,055
Goodwill impairment	(69,055)
Ending balance	$ 0	$ 69,055

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