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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 233,073	$ 218,569	$ 206,899
Ending Balance	245,413	233,073	218,569
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(1,084)	(717)	59
Other comprehensive income	1,104	(367)	(776)
Ending Balance	20	(1,084)	(717)
Available-for-sale Securities [Member] | Changes in fair value of available for sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(1,075)	(706)	75
Other comprehensive income	1,095	(369)	(781)
Ending Balance	20	(1,075)	(706)
Held-to-maturity Securities | Changes in fair value of available for sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(9)	(11)	(16)
Other comprehensive income	9	2	5
Ending Balance	$ 0	$ (9)	$ (11)

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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