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Loans Receivable And Allowance For Loan Losses: Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Sep. 30, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 699,077	$ 675,201
Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	121,705	118,560
Mortgage loans, multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	61,051	62,303
Mortgage loans, commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	331,901	312,525
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	59,352	52,029
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,506	4,074
Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	9,417	6,841
Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	5,296	11,539
Mortgage loans, land
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	24,333	21,627
Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	36,320	39,727
Consumer loans, other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,789	4,139
Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	43,407	41,837
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	680,160	644,423
Pass | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	118,923	115,131
Pass | Mortgage loans, multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	59,289	60,504
Pass | Mortgage loans, commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	321,664	292,756
Pass | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	59,352	51,432
Pass | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,506	4,074
Pass | Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	9,417	6,841
Pass | Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	5,296	11,539
Pass | Mortgage loans, land
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	20,955	18,010
Pass | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	35,661	38,261
Pass | Consumer loans, other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,723	4,078
Pass | Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	43,374	41,797
Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	7,999	10,677
Watch | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	507	364
Watch | Mortgage loans, multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Watch | Mortgage loans, commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	6,274	8,411
Watch | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	229
Watch | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Watch | Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Watch | Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Watch | Mortgage loans, land
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,030	1,043
Watch | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	155	590
Watch | Consumer loans, other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Watch | Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	33	40
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	7,832	15,065
Special Mention | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	648	661
Special Mention | Mortgage loans, multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,762	1,799
Special Mention | Mortgage loans, commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,560	10,746
Special Mention | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Special Mention | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Special Mention | Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Special Mention | Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Special Mention | Mortgage loans, land
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,807	1,859
Special Mention | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	55	0
Special Mention | Consumer loans, other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Special Mention | Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,086	5,036
Substandard | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,627	2,404
Substandard | Mortgage loans, multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Substandard | Mortgage loans, commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	403	612
Substandard | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	368
Substandard | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Substandard | Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Substandard | Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Substandard | Mortgage loans, land
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	541	715
Substandard | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	449	876
Substandard | Consumer loans, other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	66	61
Substandard | Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 0	$ 0

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