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FAIR VALUE DISCLOSURES (Schedule of the Carrying Amount, Fair Value, and Placement in the Fair Value Hierarchy of Financial Instruments) (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Sep. 30, 2019
--- | --- | ---
Financial instruments - assets |  |
Investment securities held to maturity | $ 28,070 | $ 29,481
Fair Value, Inputs, Level 1 [Member] |  |
Financial instruments - assets |  |
Investment securities held to maturity |  |
Loans |  |
Financial instruments - liabilities |  |
Certificates of deposit including retirement certificates |  |
Borrowings |  |
Fair Value, Inputs, Level 2 [Member] |  |
Financial instruments - assets |  |
Investment securities held to maturity | 28,538 | 29,344
Loans |  |
Financial instruments - liabilities |  |
Certificates of deposit including retirement certificates | 131,894 | 117,730
Borrowings | 67,884 | 36,583
Fair Value, Inputs, Level 3 [Member] |  |
Financial instruments - assets |  |
Investment securities held to maturity |  |
Loans | 623,094 | 527,088
Financial instruments - liabilities |  |
Certificates of deposit including retirement certificates |  |
Borrowings |  |
Carrying Value [Member] |  |
Financial instruments - assets |  |
Investment securities held to maturity | 28,070 | 29,481
Loans | 604,550 | 518,217
Financial instruments - liabilities |  |
Certificates of deposit including retirement certificates | 129,463 | 116,776
Borrowings | 66,941 | 36,189
Fair Value [Member] |  |
Financial instruments - assets |  |
Investment securities held to maturity | 28,538 | 29,344
Loans | 623,094 | 527,088
Financial instruments - liabilities |  |
Certificates of deposit including retirement certificates | 131,894 | 117,730
Borrowings | $ 67,884 | $ 36,583

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