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LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of Average Recorded Investment in Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans			$ 8,900	$ 6,500
One-to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 1,344	$ 1,878	1,273	2,360
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	4,133	3,661	4,067	3,771
Construction [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	2,900		2,900
Home equity lines of credit [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	20	29	32	15
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	533	361	591	332
Other [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 8,930	$ 5,929	$ 8,863	$ 6,478

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Average 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 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5258-111524

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