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Goodwill - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Goodwill [Line Items]
Goodwill, foreign exchange translation, decline	$ 0.3	$ 0.3
Trust Advisory Group, Ltd
Goodwill [Line Items]
Additional goodwill from acquisition	$ 2.0

X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) asset representing future economic benefit 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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