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Fair Value Measurements: Schedule of estimated fair values of financial instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Sep. 30, 2016
--- | --- | ---
Recorded Amount |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | $ 132,440 | $ 108,941
CDs held for investment | 41,187 | 53,000
Investment securities | 8,504 | 8,853
FHLB stock | 1,107 | 2,204
Loans receivable, net | 687,158 | 663,146
Loans held for sale | 3,523 | 3,604
Accrued interest receivable | 2,437 | 2,348
Non-interest-bearing demand | 197,527 | 172,283
Interest-bearing | 621,291 | 589,251
Total deposits | 818,818 | 761,534
FHLB borrowings |  | 30,000
Accrued interest payable | 162 | 247
Fair Value |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 132,440 | 108,941
CDs held for investment | 41,187 | 53,000
Investment securities | 9,172 | 9,737
FHLB stock | 1,107 | 2,204
Loans receivable, net | 686,285 | 671,017
Loans held for sale | 3,616 | 3,714
Accrued interest receivable | 2,437 | 2,348
Non-interest-bearing demand | 197,527 | 172,283
Interest-bearing | 621,863 | 589,762
Total deposits | 819,390 | 762,045
FHLB borrowings |  | 30,684
Accrued interest payable | 162 | 247
Fair Value | Fair Value, Inputs, Level 1 |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 132,440 | 108,941
CDs held for investment | 41,187 | 53,000
Investment securities | 3,952 | 4,029
FHLB stock | 1,107 | 2,204
Loans receivable, net | 0 | 0
Loans held for sale | 3,616 | 3,714
Accrued interest receivable | 2,437 | 2,348
Non-interest-bearing demand | 197,527 | 172,283
Interest-bearing | 481,001 | 441,277
Total deposits | 678,528 | 613,560
FHLB borrowings |  | 0
Accrued interest payable | 162 | 247
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 | 5,220 | 5,708
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 borrowings |  | 30,684
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 | 686,285 | 671,017
Loans held for sale | 0 | 0
Accrued interest receivable | 0 | 0
Non-interest-bearing demand | 0 | 0
Interest-bearing | 140,862 | 148,485
Total deposits | 140,862 | 148,485
FHLB borrowings |  | 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 No definition available. + Details
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- Definition Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits. + References No definition available. + 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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