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Fair Value Measurements: Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Sep. 30, 2021
--- | --- | ---
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Investments in equity securities | $ 835 | $ 955
Recorded Amount |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 316,755 | 580,196
CDs held for investment | 22,894 | 28,482
Investment securities | 308,023 | 132,278
Investments in equity securities | 835 | 955
FHLB stock | 2,194 | 2,103
Other investments | 3,000 | 3,000
Loans held for sale | 748 | 3,217
Loans receivable, net | 1,132,426 | 968,454
Accrued interest receivable | 4,483 | 3,745
Certificates of deposit | 122,584 | 134,129
Accrued interest payable | 108 | 137
Fair Value |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 316,755 | 580,196
CDs held for investment | 22,519 | 28,771
Investment securities | 291,198 | 133,285
Investments in equity securities | 835 | 955
FHLB stock | 2,194 | 2,103
Other investments | 3,000 | 3,000
Loans held for sale | 758 | 3,290
Loans receivable, net | 1,124,579 | 981,905
Accrued interest receivable | 4,483 | 3,745
Certificates of deposit | 120,807 | 135,178
Accrued interest payable | 108 | 134
Fair Value | Fair Value, Inputs, Level 1 |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 316,755 | 580,196
CDs held for investment | 22,519 | 28,771
Investment securities | 158,578 | 28,669
Investments in equity securities | 835 | 955
FHLB stock | 2,194 | 2,103
Other investments | 3,000 | 3,000
Loans held for sale | 758 | 3,290
Loans receivable, net | 0 | 0
Accrued interest receivable | 4,483 | 3,745
Certificates of deposit | 0 | 0
Accrued interest payable | 108 | 134
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 | 132,620 | 104,616
Investments in equity securities | 0 | 0
FHLB stock | 0 | 0
Other investments | 0 | 0
Loans held for sale | 0 | 0
Loans receivable, net | 0 | 0
Accrued interest receivable | 0 | 0
Certificates of deposit | 0 | 0
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
Investments in equity securities | 0 | 0
FHLB stock | 0 | 0
Other investments | 0 | 0
Loans held for sale | 0 | 0
Loans receivable, net | 1,124,579 | 981,905
Accrued interest receivable | 0 | 0
Certificates of deposit | 120,807 | 135,178
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 Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740 + 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://fasb.org/us-gaap/role/ref/legacyRef -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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