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Investment Securities: Marketable Securities (Details) - USD ($)	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Held to Maturity
Amortized Cost	$ 136,861,000	$ 172,097,000
Gross Unrealized Gains	416,000	483,000
Gross Unrealized Losses	(4,943,000)	(6,573,000)
Estimated Fair Value	132,334,000	166,007,000
ACL	36,000	60,000	$ 0
Available for Sale
Total	78,617,000	72,231,000
Gross Unrealized Gains	382,000	551,000
Gross Unrealized Losses	759,000	525,000
Estimated Fair Value	78,240,000	72,257,000
U.S. government securities
Held to Maturity
Amortized Cost	69,646,000	92,312,000
Gross Unrealized Gains	15,000	70,000
Gross Unrealized Losses	(2,760,000)	(4,197,000)
Estimated Fair Value	66,901,000	88,185,000
ACL	0	0
Available for Sale
Total	4,968,000	3,934,000
Gross Unrealized Gains	0	6,000
Gross Unrealized Losses	0	1,000
Estimated Fair Value	4,968,000	3,939,000
MBS: U.S. government agencies
Held to Maturity
Amortized Cost	48,735,000	49,481,000
Gross Unrealized Gains	199,000	174,000
Gross Unrealized Losses	(1,357,000)	(1,378,000)
Estimated Fair Value	47,577,000	48,277,000
ACL	0	0
Available for Sale
Total	73,649,000	68,297,000
Gross Unrealized Gains	382,000	545,000
Gross Unrealized Losses	759,000	524,000
Estimated Fair Value	73,272,000	68,318,000
Private label residential
Held to Maturity
Amortized Cost	17,376,000	28,479,000
Gross Unrealized Gains	196,000	231,000
Gross Unrealized Losses	(822,000)	(980,000)
Estimated Fair Value	16,750,000	27,730,000
ACL	35,000	55,000	0
Municipal securities
Held to Maturity
Amortized Cost	605,000	1,330,000
Gross Unrealized Gains	6,000	8,000
Gross Unrealized Losses	0	0
Estimated Fair Value	611,000	1,338,000
ACL	0	0
Bank issued trust preferred securities
Held to Maturity
Amortized Cost	499,000	495,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4,000)	(18,000)
Estimated Fair Value	495,000	477,000
ACL	$ 1,000	$ 5,000	$ 0

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