Derivatives - Schedule of Average Outstanding Daily Volume for Forward Currency Contract (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Forward currency contracts
Open Forward Foreign Currency Contract [Line Items]
Average U.S. Dollar notional outstanding	$ 9,922	$ 0	$ 0

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