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LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of troubled debt restructurings) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) N | Jun. 30, 2017 USD ($) N
Number of Loans | N |  | 1
Investment Before TDR Modification |  | $ 182
Investment After TDR Modification |  | 182
Amount of residential real estate loans foreclosed | 1,200 | 1,200
Amount of consumer mortgage loans collateralized by residential real estate property in the process of foreclosure | $ 1,600 | $ 1,600
One-to four-family residential [Member] |  |
Number of Loans | N |  | 1
Investment Before TDR Modification |  | $ 182
Investment After TDR Modification |  | $ 182
Commercial real estate [Member] |  |
Number of Loans | N |  |
Investment Before TDR Modification |  |
Investment After TDR Modification |  |
Construction [Member] |  |
Number of Loans | N |  |
Investment Before TDR Modification |  |
Investment After TDR Modification |  |
Home equity lines of credit [Member] |  |
Number of Loans | N |  |
Investment Before TDR Modification |  |
Investment After TDR Modification |  |
Commercial business [Member] |  |
Number of Loans | N |  |
Investment Before TDR Modification |  |
Investment After TDR Modification |  |
Other [Member] |  |
Number of Loans | N |  |
Investment Before TDR Modification |  |
Investment After TDR Modification |  |

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition Pre-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL49126937-111524 + Details
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