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Deposits: Schedule of Interest Expense on Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Deposits [Abstract]
NOW checking	$ 4,611	$ 5,148	$ 3,561
Savings	640	529	415
Money market	9,882	9,248	1,601
Certificates of deposit	16,139	14,734	5,725
Total	$ 31,272	$ 29,659	$ 11,302

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Interest expense incurred on demand deposit accounts that represent borrowings rather than outstanding drafts.

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-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
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- Definition

Aggregate amount of interest expense on all deposits.

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Interest expense incurred on all money market deposits.

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Interest expense incurred on all savings account deposits.

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The aggregate interest expense incurred on time deposits, including certificates of deposits, in domestic offices.

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