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Loans Receivable and Allowance for Loan Losses: Schedule of Loans receivable and Loans held for sale (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Sep. 30, 2016
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans receivable | $ 784,794 | $ 723,828
Undisbursed portion of construction loans in process | 82,411 | 48,627
Deferred loan origination fees | 2,466 | 2,229
Allowance for loan losses | 9,553 | 9,826
Less: Loans in process, Deferred fees and Allowance for loan losses | 94,430 | 60,682
Total loans receivable, net | 690,364 | 663,146
Total mortgage loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 698,107 | 638,125
Mortgage loans, one-to-four family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 118,147 | 118,560
Mortgage loans, multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 58,607 | 62,303
Mortgage loans, commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 328,927 | 312,525
Mortgage loans, construction - custom and owner/builder |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 117,641 | 93,049
Mortgage loans, construction - speculative one-to-four family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 9,918 | 8,106
Mortgage loans, construction - commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 19,630 | 9,365
Mortgage loans, construction - multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 21,327 | 12,590
Mortgage loans, land |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 23,910 | 21,627
Total consumer loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Consumer loans | 42,243 | 43,866
Consumer loans, home equity and second mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Consumer loans | 38,420 | 39,727
Consumer loans, other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Consumer loans | 3,823 | 4,139
Commercial business loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Commercial business loans | $ 44,444 | $ 41,837

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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + 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 Reference 2: 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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- Definition Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159169&loc=d3e10152-111534 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84165051&loc=d3e45377-112738 + Details
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