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LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of Impaired Loans by Class) (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Sep. 30, 2015
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance | $ 1,307 | $ 1,690
Related Allowance With Specific Allowance | 95 | 201
Recorded Investment With No Specific Allowance | 7,887 | 8,947
Total Recorded Investment | 9,194 | 10,637
Total Unpaid Contractual Principal Balance | 9,717 | 11,967
One-to four-family residential [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  |
Related Allowance With Specific Allowance |  |
Recorded Investment With No Specific Allowance | 3,771 | 3,017
Total Recorded Investment | 3,771 | 3,017
Total Unpaid Contractual Principal Balance | 4,002 | 3,134
Commercial real estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  |
Related Allowance With Specific Allowance |  |
Recorded Investment With No Specific Allowance | 3,863 | 5,447
Total Recorded Investment | 3,863 | 5,447
Total Unpaid Contractual Principal Balance | 3,863 | 6,556
Construction [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  |
Related Allowance With Specific Allowance |  |
Recorded Investment With No Specific Allowance |  |
Total Recorded Investment |  |
Total Unpaid Contractual Principal Balance |  |
Home equity lines of credit [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  |
Related Allowance With Specific Allowance |  |
Recorded Investment With No Specific Allowance |  | 417
Total Recorded Investment |  | 417
Total Unpaid Contractual Principal Balance |  | 521
Commercial business [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance | 1,307 | 1,690
Related Allowance With Specific Allowance | 95 | 201
Recorded Investment With No Specific Allowance | 253 | 66
Total Recorded Investment | 1,560 | 1,756
Total Unpaid Contractual Principal Balance | 1,852 | $ 1,756
Other [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  |
Related Allowance With Specific Allowance |  |
Recorded Investment With No Specific Allowance |  |
Total Recorded Investment |  |
Total Unpaid Contractual Principal Balance |  |

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