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Investment Securities: Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Held to maturity
Amortized Cost	$ 7,618	$ 7,913
Gross Unrealized Gains	920	994
Gross Unrealized Losses	(3)	(13)
Estimated Fair Value	8,535	8,894
Available for sale
Amortized Cost	1,352	1,387
Gross Unrealized Gains	31	34
Gross Unrealized Losses	(20)	(29)
Estimated Fair Value	1,363	1,392
Mortgage-backed Securities, U.S. government agencies
Held to maturity
Amortized Cost	711	828
Gross Unrealized Gains	20	23
Gross Unrealized Losses	(1)	(1)
Estimated Fair Value	730	850
Available for sale
Amortized Cost	352	387
Gross Unrealized Gains	31	34
Gross Unrealized Losses	0	0
Estimated Fair Value	383	421
Mortgage-backed Securities, Private label residential
Held to maturity
Amortized Cost	901	1,081
Gross Unrealized Gains	787	894
Gross Unrealized Losses	(2)	(12)
Estimated Fair Value	1,686	1,963
U.S. Treasury and U.S government agency securities
Held to maturity
Amortized Cost	6,006	6,004
Gross Unrealized Gains	113	77
Gross Unrealized Losses	0	0
Estimated Fair Value	6,119	6,081
Mutual funds
Available for sale
Amortized Cost	1,000	1,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(20)	(29)
Estimated Fair Value	$ 980	$ 971

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