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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, 2020	Sep. 30, 2019
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance	$ 2,905
Related Allowance Impaired Loans with Specific Allowance	221
Recorded Investment Impaired Loans with No Specific Allowance	9,249	10,354
Total Impaired Loans Recorded Investment	12,154	10,354
Total Impaired Loans Unpaid Principal Balance	12,154	10,354
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	2,177	1,405
Total Impaired Loans Recorded Investment	2,177	1,405
Total Impaired Loans Unpaid Principal Balance	2,177	1,405
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance	599
Related Allowance Impaired Loans with Specific Allowance	46
Recorded Investment Impaired Loans with No Specific Allowance	2,768	4,593
Total Impaired Loans Recorded Investment	3,367	4,593
Total Impaired Loans Unpaid Principal Balance	3,367	4,593
Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance	2,306
Related Allowance Impaired Loans with Specific Allowance	175
Recorded Investment Impaired Loans with No Specific Allowance	2,900	2,900
Total Impaired Loans Recorded Investment	5,206	2,900
Total Impaired Loans Unpaid Principal Balance	5,206	2,900
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	1,404	1,456
Total Impaired Loans Recorded Investment	1,404	1,456
Total Impaired Loans Unpaid Principal Balance	$ 1,404	$ 1,456

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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
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