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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
	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 10,787	$ 13,680
One-to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	2,464	2,490
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	2,236	4,370
Construction [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	4,580	4,861
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 1,507	$ 1,959

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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://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=123577603&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

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