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Investment Securities: Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Held to maturity
Amortized Cost	$ 7,743	$ 7,913
Gross Unrealized Gains	892	994
Gross Unrealized Losses	(7)	(13)
Estimated Fair Value	8,628	8,894
Available for sale
Amortized Cost	1,361	1,387
Gross Unrealized Gains	30	34
Gross Unrealized Losses	(26)	(29)
Estimated Fair Value	1,365	1,392
Mortgage-backed Securities, U.S. government agencies
Held to maturity
Amortized Cost	745	828
Gross Unrealized Gains	21	23
Gross Unrealized Losses	(1)	(1)
Estimated Fair Value	765	850
Available for sale
Amortized Cost	361	387
Gross Unrealized Gains	30	34
Gross Unrealized Losses	0	0
Estimated Fair Value	391	421
Mortgage-backed Securities, Private label residential
Held to maturity
Amortized Cost	993	1,081
Gross Unrealized Gains	799	894
Gross Unrealized Losses	(6)	(12)
Estimated Fair Value	1,786	1,963
U.S. Treasury and U.S government agency securities
Held to maturity
Amortized Cost	6,005	6,004
Gross Unrealized Gains	72	77
Gross Unrealized Losses	0	0
Estimated Fair Value	6,077	6,081
Mutual funds
Available for sale
Amortized Cost	1,000	1,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(26)	(29)
Estimated Fair Value	$ 974	$ 971

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