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Loans Receivable And Allowance For Loan Losses: Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 634,942	$ 616,394
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	602,846	576,150
Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	10,717	10,511
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	10,773	17,016
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	10,606	12,717
Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	117,465	116,664
Mortgage loans, one-to-four family | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	113,311	111,351
Mortgage loans, one-to-four family | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	722	653
Mortgage loans, one-to-four family | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	668	1,339
Mortgage loans, one-to-four family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,764	3,321
Mortgage loans, multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	42,666	52,322
Mortgage loans, multi-family | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	40,844	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	1,822	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	290,817	291,216
Mortgage loans, commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	271,130	270,685
Mortgage loans, commercial | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	8,266	8,040
Mortgage loans, commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	5,686	6,803
Mortgage loans, commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	5,735	5,688
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	41,312	36,192
Mortgage loans, construction - custom and owner/builder | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	41,125	36,192
Mortgage loans, construction - custom and owner/builder | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	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	2,956	3,781
Mortgage loans, construction - speculative one-to-four family | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,956	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	16,902	12,200
Mortgage loans, construction – commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	16,902	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	13,623	5,290
Mortgage loans, construction - Multi-family | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	13,623	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	24,322	26,140
Mortgage loans, land | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	20,502	20,964
Mortgage loans, land | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,058	1,105
Mortgage loans, land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,887	2,078
Mortgage loans, land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	875	1,993
Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	37,144	34,157
Consumer loans, home equity and second mortgage | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	34,796	32,172
Consumer loans, home equity and second mortgage | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	626	664
Consumer loans, home equity and second mortgage | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	710	404
Consumer loans, home equity and second mortgage | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,012	917
Consumer loans, other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	4,380	4,669
Consumer loans, other | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	4,347	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	33	38
Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	43,355	33,763
Commercial business loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	43,310	33,635
Commercial business loans | Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	45	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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