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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	Dec. 31, 2017 USD ($) N	Sep. 30, 2017 USD ($) N
Available For Sale and Held To Maturity Securities
Number of Securities | N	35	31
Less Than 12 Months, Fair Value	$ 12,505	$ 12,430
Less Than 12 Months, Unrealized Losses	(95)	(173)
12 Months Or Greater, Fair Value	32,147	27,291
12 Months Or Greater, Unrealized Losses	(960)	(602)
Total, Fair Value	44,652	39,721
Total, Unrealized Losses	$ (1,055)	$ (775)
Obligations of U.S. government agencies Mortgage backed securities - residential [Member]
Available For Sale and Held To Maturity Securities
Number of Securities | N	2	2
Less Than 12 Months, Fair Value
Less Than 12 Months, Unrealized Losses
12 Months Or Greater, Fair Value	534	605
12 Months Or Greater, Unrealized Losses	(97)	(96)
Total, Fair Value	534	605
Total, Unrealized Losses	$ (97)	$ (96)
Obligations of U.S. government agencies Mortgage backed securities -commercial [Member]
Available For Sale and Held To Maturity Securities
Number of Securities | N	1	1
Less Than 12 Months, Fair Value	$ 942	$ 958
Less Than 12 Months, Unrealized Losses	(9)	(10)
12 Months Or Greater, Fair Value
12 Months Or Greater, Unrealized Losses
Total, Fair Value	942	958
Total, Unrealized Losses	$ (9)	$ (10)
Obligations of U.S. government-sponsored enterprises Mortgage-backed securities-residential [Member]
Available For Sale and Held To Maturity Securities
Number of Securities | N	24	20
Less Than 12 Months, Fair Value	$ 10,068	$ 6,582
Less Than 12 Months, Unrealized Losses	(82)	(92)
12 Months Or Greater, Fair Value	23,367	21,713
12 Months Or Greater, Unrealized Losses	(467)	(284)
Total, Fair Value	33,435	28,295
Total, Unrealized Losses	$ (549)	$ (376)
Obligations of U.S. government-sponsored enterprises Debt securities [Member]
Available For Sale and Held To Maturity Securities
Number of Securities | N	5	5
Less Than 12 Months, Fair Value	$ 1,495	$ 4,890
Less Than 12 Months, Unrealized Losses	(4)	(71)
12 Months Or Greater, Fair Value	5,359	1,996
12 Months Or Greater, Unrealized Losses	(104)	(4)
Total, Fair Value	6,854	6,886
Total, Unrealized Losses	$ (108)	$ (75)
Private label mortgage-backed securities-residential [Member]
Available For Sale and Held To Maturity Securities
Number of Securities | N	2	2
Less Than 12 Months, Fair Value
Less Than 12 Months, Unrealized Losses
12 Months Or Greater, Fair Value	177	193
12 Months Or Greater, Unrealized Losses	(2)	(2)
Total, Fair Value	177	193
Total, Unrealized Losses	$ (2)	$ (2)
Corporate securities [Member]
Available For Sale and Held To Maturity Securities
Number of Securities | N	1	1
Less Than 12 Months, Fair Value
Less Than 12 Months, Unrealized Losses
12 Months Or Greater, Fair Value	2,710	2,784
12 Months Or Greater, Unrealized Losses	(290)	(216)
Total, Fair Value	2,710	2,784
Total, Unrealized Losses	$ (290)	$ (216)

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