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Fair Value Measurements: Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Investments in equity securities | $ 866 | $ 811
Recorded Amount |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 164,728 | 128,721
CDs held for investment | 10,209 | 15,188
Investment securities | 244,354 | 311,989
Investments in equity securities | 866 | 811
FHLB stock | 2,037 | 3,602
Other investments | 3,000 | 3,000
Loans held for sale |  | 400
Loans receivable, net | 1,421,523 | 1,302,305
Accrued interest receivable | 6,990 | 6,004
Certificates of deposit | 368,308 | 300,100
FHLB borrowings | 20,000 | 35,000
Accrued interest payable | 2,132 | 1,397
Fair Value |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 164,728 | 128,721
CDs held for investment | 10,209 | 15,188
Investment securities | 238,264 | 295,538
Investments in equity securities | 866 | 811
FHLB stock | 2,037 | 3,602
Other investments | 3,000 | 3,000
Loans held for sale |  | 407
Loans receivable, net | 1,387,642 | 1,246,538
Accrued interest receivable | 6,990 | 6,004
Certificates of deposit | 368,312 | 297,542
FHLB borrowings | 20,035 | 34,747
Accrued interest payable | 2,132 | 1,397
Fair Value | Fair Value, Inputs, Level 1 |  |
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 164,728 | 128,721
CDs held for investment | 10,209 | 15,188
Investment securities | 146,141 | 161,538
Investments in equity securities | 866 | 811
FHLB stock | 2,037 | 3,602
Other investments | 3,000 | 3,000
Loans held for sale |  | 407
Loans receivable, net | 0 | 0
Accrued interest receivable | 6,990 | 6,004
Certificates of deposit | 0 | 0
FHLB borrowings | 0 | 0
Accrued interest payable | 2,132 | 1,397
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 | 92,123 | 134,000
Investments in equity securities | 0 | 0
FHLB stock | 0 | 0
Other investments | 0 | 0
Loans held for sale |  | 0
Loans receivable, net | 0 | 0
Accrued interest receivable | 0 | 0
Certificates of deposit | 0 | 0
FHLB borrowings | 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
Loans receivable, net | 1,387,642 | 1,246,538
Accrued interest receivable | 0 | 0
Certificates of deposit | 368,312 | 297,542
FHLB borrowings | 20,035 | 34,747
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/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + 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/2009/role/commonPracticeRef -Topic 940 -SubTopic 320 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479035/940-320-45-2 + Details
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