Goodwill - Summary of Changes in Carrying Amount of Goodwill by Reportable Segment (Detail) $ in Thousands	6 Months Ended
Mar. 31, 2026 USD ($)
Goodwill [Line Items]
Beginning balance	$ 526,931
Foreign currency translation	(1,281)
Ending balance	525,650
Retail Operations [Member]
Goodwill [Line Items]
Beginning balance	526,931
Foreign currency translation	(1,281)
Ending balance	525,650
Product Manufacturing [Member]
Goodwill [Line Items]
Beginning balance	0
Ending balance	$ 0

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details