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INVESTMENT SECURITIES (Summary of Maturities of Debt Securities and Mortgage-backed Securities Held to Maturity) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Sep. 30, 2017
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | $ 37,082 | $ 51,368
Gross Unrealized Gains | 6 | 472
Gross Unrealized Losses | (1,237) | (599)
Fair Value | 35,851 | 51,241
Obligations of U.S. government agencies Mortgage backed securities - residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 610 | 3,466
Gross Unrealized Gains |  | 123
Gross Unrealized Losses | (97) | (96)
Fair Value | 513 | 3,493
Obligations of U.S. government agencies Mortgage backed securities -commercial [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 936 | 968
Gross Unrealized Gains |  |
Gross Unrealized Losses | (11) | (10)
Fair Value | 925 | 958
Obligations of U.S. government-sponsored enterprises Mortgage-backed securities-residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 27,654 | 39,016
Gross Unrealized Gains | 6 | 349
Gross Unrealized Losses | (692) | (251)
Fair Value | 26,968 | 39,114
Obligations of U.S. government-sponsored enterprises Debt securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 4,463 | 4,461
Gross Unrealized Gains |  |
Gross Unrealized Losses | (83) | (24)
Fair Value | 4,380 | 4,437
Private label mortgage-backed securities-residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 419 | 457
Gross Unrealized Gains |  |
Gross Unrealized Losses | (1) | (2)
Fair Value | 418 | 455
Corporate securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 3,000 | 3,000
Gross Unrealized Gains |  |
Gross Unrealized Losses | (353) | (216)
Fair Value | $ 2,647 | $ 2,784

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- Definition Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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