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LOANS RECEIVABLE, NET (Schedule of Impaired Loans by Class) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance | $ 2,835 | $ 2,905
Related Allowance | 224 | 221
Recorded Investment With No Specific Allowance | 8,233 | 11,256
Total Recorded Investment | 11,068 | 14,161
Total Unpaid Contractual Principal Balance | 11,133 | 14,430
One-to four-family residential [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  |
Related Allowance |  |
Recorded Investment With No Specific Allowance | 2,711 | 2,601
Total Recorded Investment | 2,711 | 2,601
Total Unpaid Contractual Principal Balance | 2,711 | 2,601
Commercial real estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  | 599
Related Allowance |  | 46
Recorded Investment With No Specific Allowance | 2,270 | 3,806
Total Recorded Investment | 2,270 | 4,405
Total Unpaid Contractual Principal Balance | 2,270 | 4,405
Construction [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance | 2,835 | 2,306
Related Allowance | 224 | 175
Recorded Investment With No Specific Allowance | 1,745 | 2,835
Total Recorded Investment | 4,580 | 5,141
Total Unpaid Contractual Principal Balance | 4,645 | 5,206
Commercial business [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  |
Related Allowance |  |
Recorded Investment With No Specific Allowance | 1,507 | 2,014
Total Recorded Investment | 1,507 | 2,014
Total Unpaid Contractual Principal Balance | $ 1,507 | $ 2,218

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