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LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of Impaired Loans by Class) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance
Related Allowance Impaired Loans with Specific Allowance
Recorded Investment Impaired Loans with No Specific Allowance	6,507	7,455
Total Impaired Loans Recorded Investment	6,507	7,455
Total Impaired Loans Unpaid Principal Balance	6,747	7,789
One-to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance
Related Allowance Impaired Loans with Specific Allowance
Recorded Investment Impaired Loans with No Specific Allowance	2,503	3,124
Total Impaired Loans Recorded Investment	2,503	3,124
Total Impaired Loans Unpaid Principal Balance	2,653	3,436
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance
Related Allowance Impaired Loans with Specific Allowance
Recorded Investment Impaired Loans with No Specific Allowance	3,642	4,088
Total Impaired Loans Recorded Investment	3,642	4,088
Total Impaired Loans Unpaid Principal Balance	3,642	4,110
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance
Related Allowance Impaired Loans with Specific Allowance
Recorded Investment Impaired Loans with No Specific Allowance	362	243
Total Impaired Loans Recorded Investment	362	243
Total Impaired Loans Unpaid Principal Balance	$ 452	$ 243

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- Definition

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524

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Amount of allowance for credit losses related to recorded investment.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
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-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524

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Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

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