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Goodwill and CDI - CDI (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Finite-Lived Intangible Assets [Line Items]
Amortization of CDI	$ 226	$ 271	$ 316
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization of CDI	$ 226	$ 271	$ 316

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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