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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 | Dec. 31, 2018 | Sep. 30, 2018
--- | --- | ---
Financial instruments - assets |  |
Investment securities held to maturity | $ 34,553 | $ 33,645
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 | 33,467 | 32,151
Loans |  |
Financial instruments - liabilities |  |
Certificates of deposit including retirement certificates | 126,997 | 130,813
Borrowings | 34,329 | 34,863
Fair Value, Inputs, Level 3 [Member] |  |
Financial instruments - assets |  |
Investment securities held to maturity |  |
Loans | 509,628 | 505,479
Financial instruments - liabilities |  |
Certificates of deposit including retirement certificates |  |
Borrowings |  |
Carrying Value [Member] |  |
Financial instruments - assets |  |
Investment securities held to maturity | 34,553 | 33,645
Loans | 510,161 | 508,430
Financial instruments - liabilities |  |
Certificates of deposit including retirement certificates | 126,599 | 130,343
Borrowings | 34,699 | 35,524
Fair Value [Member] |  |
Financial instruments - assets |  |
Investment securities held to maturity | 33,467 | 32,151
Loans | 509,628 | 505,479
Financial instruments - liabilities |  |
Certificates of deposit including retirement certificates | 126,997 | 130,813
Borrowings | $ 34,329 | $ 34,863

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