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Fair Value Measurements: Schedule of estimated fair values of financial instruments (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Sep. 30, 2015
--- | --- | ---
Recorded Amount |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | $ 110,029 | $ 92,289
CDs held for investment | 52,524 | 48,611
Investment securities | 9,108 | 9,305
FHLB stock | 2,804 | 2,699
Loans receivable, net | 622,851 | 604,277
Loans held for sale | 1,584 | 3,051
Accrued interest receivable | 2,232 | 2,170
Non-interest-bearing demand | 148,980 | 141,388
Interest-bearing | 563,058 | 537,524
Total deposits | 712,038 | 678,912
FHLB advances | 45,000 | 45,000
Accrued interest payable | 311 | 289
Fair Value |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 110,029 | 92,289
CDs held for investment | 52,524 | 48,611
Investment securities | 9,993 | 10,286
FHLB stock | 2,804 | 2,699
Loans receivable, net | 630,306 | 614,734
Loans held for sale | 1,631 | 3,139
Accrued interest receivable | 2,232 | 2,170
Non-interest-bearing demand | 148,980 | 141,388
Interest-bearing | 563,459 | 538,092
Total deposits | 712,439 | 679,480
FHLB advances | 46,288 | 46,742
Accrued interest payable | 311 | 289
Fair Value | Fair Value, Inputs, Level 1 |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 110,029 | 92,289
CDs held for investment | 52,524 | 48,611
Investment securities | 3,998 | 3,996
FHLB stock | 2,804 | 2,699
Loans receivable, net | 0 | 0
Loans held for sale | 1,631 | 3,139
Accrued interest receivable | 2,232 | 2,170
Non-interest-bearing demand | 148,980 | 141,388
Interest-bearing | 412,062 | 383,419
Total deposits | 561,042 | 524,807
FHLB advances | 0 | 0
Accrued interest payable | 311 | 289
Fair Value | Fair Value, Inputs, Level 2 |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 0 | 0
CDs held for investment | 0 | 0
Investment securities | 5,995 | 6,290
FHLB stock | 0 | 0
Loans receivable, net | 0 | 0
Loans held for sale | 0 | 0
Accrued interest receivable | 0 | 0
Non-interest-bearing demand | 0 | 0
Interest-bearing | 0 | 0
Total deposits | 0 | 0
FHLB advances | 46,288 | 46,742
Accrued interest payable | 0 | 0
Fair Value | Fair Value, Inputs, Level 3 |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 0 | 0
CDs held for investment | 0 | 0
Investment securities | 0 | 0
FHLB stock | 0 | 0
Loans receivable, net | 630,306 | 614,734
Loans held for sale | 0 | 0
Accrued interest receivable | 0 | 0
Non-interest-bearing demand | 0 | 0
Interest-bearing | 151,397 | 154,673
Total deposits | 151,397 | 154,673
FHLB advances | 0 | 0
Accrued interest payable | $ 0 | $ 0

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition Fair value portion of borrowing from Federal Home Loan Bank (FHLBank). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The fair value as of the balance sheet date of firm holdings in mortgages, mortgage backed securities (investment instruments that represent ownership of an undivided interest in a group of mortgages, where principal and interest from the individual mortgages are used to pay investors' principal and interest on the mortgage backed security) and asset-backed securities that are primarily paid from the cash flows of a discrete pool of receivables or other financial assets (such as credit-card receivables), either fixed or revolving, that by their terms convert into cash within a finite time period. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(12)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 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(5)) -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 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 + Details
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