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Loans Receivable And Allowance For Loan Losses: Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 659,441	$ 616,394
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	628,352	576,150
Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	10,403	10,511
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	12,990	17,016
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	7,696	12,717
Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	117,055	116,664
Mortgage loans, one-to-four family | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	113,648	111,351
Mortgage loans, one-to-four family | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	112	653
Mortgage loans, one-to-four family | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	665	1,339
Mortgage loans, one-to-four family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,630	3,321
Mortgage loans, multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	51,672	52,322
Mortgage loans, multi-family | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	49,861	45,249
Mortgage loans, multi-family | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, multi-family | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,811	6,313
Mortgage loans, multi-family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	760
Mortgage loans, commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	294,887	291,216
Mortgage loans, commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	275,402	270,685
Mortgage loans, commercial | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	8,457	8,040
Mortgage loans, commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	7,962	6,803
Mortgage loans, commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,066	5,688
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	50,851	36,192
Mortgage loans, construction - custom and owner/builder | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	50,516	36,192
Mortgage loans, construction - custom and owner/builder | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	148	0
Mortgage loans, construction - custom and owner/builder | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, construction - custom and owner/builder | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	187	0
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,773	3,781
Mortgage loans, construction - speculative one-to-four family | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,773	3,781
Mortgage loans, construction - speculative one-to-four family | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, construction - speculative one-to-four family | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, construction - speculative one-to-four family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	16,495	12,200
Mortgage loans, construction – commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	16,495	12,200
Mortgage loans, construction – commercial | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, construction – commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, construction – commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	14,089	5,290
Mortgage loans, construction - Multi-family | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	14,089	5,290
Mortgage loans, construction - Multi-family | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, construction - Multi-family | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, construction - Multi-family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Mortgage loans, land
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	24,076	26,140
Mortgage loans, land | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	20,313	20,964
Mortgage loans, land | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,051	1,105
Mortgage loans, land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,845	2,078
Mortgage loans, land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	867	1,993
Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	38,482	34,157
Consumer loans, home equity and second mortgage | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	36,266	32,172
Consumer loans, home equity and second mortgage | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	593	664
Consumer loans, home equity and second mortgage | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	707	404
Consumer loans, home equity and second mortgage | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	916	917
Consumer loans, other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	4,490	4,669
Consumer loans, other | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	4,460	4,631
Consumer loans, other | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Consumer loans, other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Consumer loans, other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	30	38
Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	43,571	33,763
Commercial business loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	43,529	33,635
Commercial business loans | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	42	49
Commercial business loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	79
Commercial business loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 0	$ 0

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