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Loans Receivable And Allowance For Loan Losses: Schedule of loans evaluated individually for impairment and collectively evaluated for impairment in the allowance for loan losses (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	$ 429		$ 776
Allowance for Loan Losses, Collectively Evaluated for Impairment	9,181		9,050
Allowance for Loan Losses, Total	9,610	$ 9,590	9,826	$ 9,842	$ 10,043	$ 9,924
Recorded Investment in Loans, Individually Evaluated for Impairment	7,167		16,237
Recorded Investment in Loans, Collectively Evaluated for Impairment	691,910		658,964
Loans receivable	699,077		675,201
Mortgage loans, one-to-four family
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		70
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,115		1,169
Allowance for Loan Losses, Total	1,115	1,126	1,239	1,214	1,323	1,480
Recorded Investment in Loans, Individually Evaluated for Impairment	1,469		2,264
Recorded Investment in Loans, Collectively Evaluated for Impairment	120,236		116,296
Loans receivable	121,705		118,560
Mortgage loans, multi-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	464		473
Allowance for Loan Losses, Total	464	480	473	348	315	392
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	61,051		62,303
Loans receivable	61,051		62,303
Mortgage loans, commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	20		413
Allowance for Loan Losses, Collectively Evaluated for Impairment	4,317		3,971
Allowance for Loan Losses, Total	4,337	4,316	4,384	3,974	4,083	4,065
Recorded Investment in Loans, Individually Evaluated for Impairment	4,084		11,309
Recorded Investment in Loans, Collectively Evaluated for Impairment	327,817		301,216
Loans receivable	331,901		312,525
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	712		619
Allowance for Loan Losses, Total	712	695	619	635	542	451
Recorded Investment in Loans, Individually Evaluated for Impairment	0		367
Recorded Investment in Loans, Collectively Evaluated for Impairment	59,352		51,662
Loans receivable	59,352		52,029
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	75		130
Allowance for Loan Losses, Total	75	85	130	121	96	123
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	2,506		4,074
Loans receivable	2,506		4,074
Mortgage loans, construction – commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	283		268
Allowance for Loan Losses, Total	283	268	268	624	617	426
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	9,417		6,841
Loans receivable	9,417		6,841
Mortgage loans, construction - Multi-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	132		316
Allowance for Loan Losses, Total	132	96	316	387	409	283
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	5,296		11,539
Loans receivable	5,296		11,539
Mortgage loans, land
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	89		53
Allowance for Loan Losses, Collectively Evaluated for Impairment	815		767
Allowance for Loan Losses, Total	904	947	820	919	954	1,021
Recorded Investment in Loans, Individually Evaluated for Impairment	1,054		1,268
Recorded Investment in Loans, Collectively Evaluated for Impairment	23,279		20,359
Loans receivable	24,333		21,627
Consumer loans, home equity and second mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	320		227
Allowance for Loan Losses, Collectively Evaluated for Impairment	635		712
Allowance for Loan Losses, Total	955	957	939	961	1,021	1,073
Recorded Investment in Loans, Individually Evaluated for Impairment	560		999
Recorded Investment in Loans, Collectively Evaluated for Impairment	35,760		38,728
Loans receivable	36,320		39,727
Consumer loans, other
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		13
Allowance for Loan Losses, Collectively Evaluated for Impairment	134		143
Allowance for Loan Losses, Total	134	130	156	157	162	187
Recorded Investment in Loans, Individually Evaluated for Impairment	0		30
Recorded Investment in Loans, Collectively Evaluated for Impairment	3,789		4,109
Loans receivable	3,789		4,139
Commercial business loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	499		482
Allowance for Loan Losses, Total	499	$ 490	482	$ 502	$ 521	$ 423
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	43,407		41,837
Loans receivable	$ 43,407		$ 41,837

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- Definition

Loans Receivable, Including Loans Held-For-Sale and Loans in Process, Gross

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No definition available.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
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