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IMPAIRMENT OF INVESTMENT SECURITIES (Schedule of Gross Unrealized Losses and Fair Value for Both Available For Sale and Held To Maturity Securities) (Details) $ in Thousands | Mar. 31, 2018 USD ($) N | Sep. 30, 2017 USD ($) N
--- | --- | ---
Investment [Line Items] |  |
Number of Securities | N | 43 | 31
Less Than 12 Months, Fair Value | $ 21,349 | $ 12,430
Less Than 12 Months, Unrealized Losses | (402) | (173)
12 Months Or Greater, Fair Value | 33,444 | 27,291
12 Months Or Greater, Unrealized Losses | (1,407) | (602)
Total, Fair Value | 54,793 | 39,721
Total, Unrealized Losses | $ (1,809) | $ (775)
Obligations of U.S. government agencies Mortgage backed securities - residential [Member] |  |
Investment [Line Items] |  |
Number of Securities | N | 2 | 2
Less Than 12 Months, Fair Value |  |
Less Than 12 Months, Unrealized Losses |  |
12 Months Or Greater, Fair Value | 513 | 605
12 Months Or Greater, Unrealized Losses | (97) | (96)
Total, Fair Value | 513 | 605
Total, Unrealized Losses | $ (97) | $ (96)
Obligations of U.S. government agencies Mortgage backed securities -commercial [Member] |  |
Investment [Line Items] |  |
Number of Securities | N | 1 | 1
Less Than 12 Months, Fair Value |  | $ 958
Less Than 12 Months, Unrealized Losses |  | (10)
12 Months Or Greater, Fair Value | 924 |
12 Months Or Greater, Unrealized Losses | (11) |
Total, Fair Value | 924 | 958
Total, Unrealized Losses | $ (11) | $ (10)
Obligations of U.S. government-sponsored enterprises Mortgage-backed securities-residential [Member] |  |
Investment [Line Items] |  |
Number of Securities | N | 32 | 20
Less Than 12 Months, Fair Value | $ 21,349 | $ 6,582
Less Than 12 Months, Unrealized Losses | (402) | (92)
12 Months Or Greater, Fair Value | 22,461 | 21,713
12 Months Or Greater, Unrealized Losses | (743) | (284)
Total, Fair Value | 43,810 | 28,295
Total, Unrealized Losses | $ (1,145) | $ (376)
Obligations of U.S. government-sponsored enterprises Debt securities [Member] |  |
Investment [Line Items] |  |
Number of Securities | N | 5 | 5
Less Than 12 Months, Fair Value |  | $ 4,890
Less Than 12 Months, Unrealized Losses |  | (71)
12 Months Or Greater, Fair Value | 6,762 | 1,996
12 Months Or Greater, Unrealized Losses | (202) | (4)
Total, Fair Value | 6,762 | 6,886
Total, Unrealized Losses | $ (202) | $ (75)
Private label mortgage-backed securities-residential [Member] |  |
Investment [Line Items] |  |
Number of Securities | N | 2 | 2
Less Than 12 Months, Fair Value |  |
Less Than 12 Months, Unrealized Losses |  |
12 Months Or Greater, Fair Value | 137 | 193
12 Months Or Greater, Unrealized Losses | (1) | (2)
Total, Fair Value | 137 | 193
Total, Unrealized Losses | $ (1) | $ (2)
Corporate securities [Member] |  |
Investment [Line Items] |  |
Number of Securities | N | 1 | 1
Less Than 12 Months, Fair Value |  |
Less Than 12 Months, Unrealized Losses |  |
12 Months Or Greater, Fair Value | 2,647 | 2,784
12 Months Or Greater, Unrealized Losses | (353) | (216)
Total, Fair Value | 2,647 | 2,784
Total, Unrealized Losses | $ (353) | $ (216)

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