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Loans Receivable And Allowance For Loan Losses: Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Sep. 30, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 687,920	$ 675,201
Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	122,889	118,560
Mortgage loans, multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	63,181	62,303
Mortgage loans, commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	325,120	312,525
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	53,624	52,029
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,649	4,074
Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	6,588	6,841
Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,849	11,539
Mortgage loans, land
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	25,866	21,627
Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	38,024	39,727
Consumer loans, other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,527	4,139
Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	42,603	41,837
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	665,226	644,423
Pass | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	119,689	115,131
Pass | Mortgage loans, multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	61,406	60,504
Pass | Mortgage loans, commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	312,612	292,756
Pass | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	53,256	51,432
Pass | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,649	4,074
Pass | Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	6,588	6,841
Pass | Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,849	11,539
Pass | Mortgage loans, land
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	22,305	18,010
Pass | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	36,889	38,261
Pass | Consumer loans, other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,469	4,078
Pass | Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	42,514	41,797
Watch
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	8,110	10,677
Watch | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	610	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	6,280	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	1,028	1,043
Watch | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	157	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	35	40
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	10,552	15,065
Special Mention | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	653	661
Special Mention | Mortgage loans, multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,775	1,799
Special Mention | Mortgage loans, commercial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	5,914	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	2,075	1,859
Special Mention | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	135	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	4,032	5,036
Substandard | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,937	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	314	612
Substandard | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	368	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	458	715
Substandard | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	843	876
Substandard | Consumer loans, other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	58	61
Substandard | Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 54	$ 0

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