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LOANS RECEIVABLE, NET (Schedule of Impaired Loans by Class) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Sep. 30, 2016
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  | $ 997
Related Allowance |  | 39
Recorded Investment With No Specific Allowance | 7,455 | 8,256
Total Recorded Investment | 7,455 | 9,253
Total Unpaid Contractual Principal Balance | 7,789 | 10,099
One-to four-family residential [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  |
Related Allowance |  |
Recorded Investment With No Specific Allowance | 3,124 | 4,010
Total Recorded Investment | 3,124 | 4,010
Total Unpaid Contractual Principal Balance | 3,436 | 4,239
Commercial real estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  |
Related Allowance |  |
Recorded Investment With No Specific Allowance | 4,088 | 3,843
Total Recorded Investment | 4,088 | 3,843
Total Unpaid Contractual Principal Balance | 4,110 | 3,843
Commercial business [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  | 997
Related Allowance |  | 39
Recorded Investment With No Specific Allowance | 243 | 250
Total Recorded Investment | 243 | 1,247
Total Unpaid Contractual Principal Balance | $ 243 | 1,850
Home equity lines of credit [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With Specific Allowance |  |
Related Allowance |  |
Recorded Investment With No Specific Allowance |  | 153
Total Recorded Investment |  | 153
Total Unpaid Contractual Principal Balance |  | $ 167

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- Definition 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 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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