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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, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 9,652	$ 12,855	$ 10,124	$ 13,290
One-to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	1,877	2,373	2,155	2,449
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	1,690	4,006	1,883	4,139
Construction [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	4,580	4,580	4,580	4,767
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	1,505	$ 1,896	1,506	$ 1,935
Home equity lines of credit [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans
Other [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans

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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 https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

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