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Loans Receivable And Allowance For Loan Losses: Past Due Status of Loans (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Sep. 30, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		$ 2,441	$ 3,471
Loans receivable, Non-Accrual	[1]	2,055	2,873
Loans receivable, Current		696,636	671,730
Loans receivable		699,077	675,201
Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		900	1,121
Loans receivable, Non-Accrual	[1]	896	914
Loans receivable, Current		120,805	117,439
Loans receivable		121,705	118,560
Mortgage loans, multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Loans receivable, Non-Accrual	[1]	0	0
Loans receivable, Current		61,051	62,303
Loans receivable		61,051	62,303
Mortgage loans, commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		511	725
Loans receivable, Non-Accrual	[1]	403	612
Loans receivable, Current		331,390	311,800
Loans receivable		331,901	312,525
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	367
Loans receivable, Non-Accrual	[1]	0	367
Loans receivable, Current		59,352	51,662
Loans receivable		59,352	52,029
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Loans receivable, Non-Accrual	[1]	0	0
Loans receivable, Current		2,506	4,074
Loans receivable		2,506	4,074
Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Loans receivable, Non-Accrual	[1]	0	0
Loans receivable, Current		9,417	6,841
Loans receivable		9,417	6,841
Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Loans receivable, Non-Accrual	[1]	0	0
Loans receivable, Current		5,296	11,539
Loans receivable		5,296	11,539
Mortgage loans, land
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		598	548
Loans receivable, Non-Accrual	[1]	496	548
Loans receivable, Current		23,735	21,079
Loans receivable		24,333	21,627
Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		347	574
Loans receivable, Non-Accrual	[1]	260	402
Loans receivable, Current		35,973	39,153
Loans receivable		36,320	39,727
Consumer loans, other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		68	61
Loans receivable, Non-Accrual	[1]	0	30
Loans receivable, Current		3,721	4,078
Loans receivable		3,789	4,139
Commercial business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		17	75
Loans receivable, Non-Accrual	[1]	0	0
Loans receivable, Current		43,390	41,762
Loans receivable		43,407	41,837
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		176	218
30 to 59 Days Past Due | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
30 to 59 Days Past Due | Mortgage loans, multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
30 to 59 Days Past Due | Mortgage loans, commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		108	113
30 to 59 Days Past Due | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
30 to 59 Days Past Due | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
30 to 59 Days Past Due | Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
30 to 59 Days Past Due | Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
30 to 59 Days Past Due | Mortgage loans, land
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
30 to 59 Days Past Due | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	37
30 to 59 Days Past Due | Consumer loans, other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		68	31
30 to 59 Days Past Due | Commercial business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	37
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		210	245
60 to 89 Days Past Due | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		4	207
60 to 89 Days Past Due | Mortgage loans, multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
60 to 89 Days Past Due | Mortgage loans, commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
60 to 89 Days Past Due | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
60 to 89 Days Past Due | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
60 to 89 Days Past Due | Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
60 to 89 Days Past Due | Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
60 to 89 Days Past Due | Mortgage loans, land
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		102	0
60 to 89 Days Past Due | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		87	0
60 to 89 Days Past Due | Consumer loans, other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
60 to 89 Days Past Due | Commercial business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		17	38
Past Due 90 Days or More and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	135
Past Due 90 Days or More and Still Accruing | Mortgage loans, one-to-four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Past Due 90 Days or More and Still Accruing | Mortgage loans, multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Past Due 90 Days or More and Still Accruing | Mortgage loans, commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction – commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction - Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Past Due 90 Days or More and Still Accruing | Mortgage loans, land
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Past Due 90 Days or More and Still Accruing | Consumer loans, home equity and second mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	135
Past Due 90 Days or More and Still Accruing | Consumer loans, other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		0	0
Past Due 90 Days or More and Still Accruing | Commercial business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, Total Past Due		$ 0	$ 0
[1] Includes non-accrual loans past due 90 days or more and other loans classified as non-accrual.

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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 7A
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

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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 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

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