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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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 9,140	$ 9,966	$ 9,005	$ 10,181
One-to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	3,051	3,952	3,307	3,626
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	5,274	4,429	4,783	4,761
Home equity lines of credit [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	243	15	171	92
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	560	$ 1,570	732	$ 1,702
Other [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 12		$ 12

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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