Related Person Transactions - Leases (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Related Party Transaction [Line Items]
Lease expense		$ 5	$ 76
ABP Trust and Managed REIT
Related Party Transaction [Line Items]
Lease expense	$ 5,668	$ 5,552	$ 5,329
Notice to terminate lease	30 days

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