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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		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 9,851	$ 10,676	$ 9,651	$ 10,661
One-to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	3,563	3,553	3,712	3,374
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	5,106	5,211	4,685	5,289
Home equity lines of credit [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	257	139	222	231
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	913	$ 1,773	1,024	$ 1,767
Other [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 12		$ 8

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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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