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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, 2017 | Sep. 30, 2016
--- | --- | ---
Held to maturity securities |  |
Amortized cost | $ 52,248 | $ 52,934
Gross Unrealized Gains | 409 | 1,270
Gross Unrealized Losses | (722) | (355)
Fair Value | 51,935 | 53,849
Obligations of U.S. government agencies Mortgage backed securities - residential [Member] |  |
Held to maturity securities |  |
Amortized cost | 3,939 | 4,383
Gross Unrealized Gains | 116 | 171
Gross Unrealized Losses | (107) | (90)
Fair Value | 3,948 | 4,464
Obligations of U.S. government agencies Mortgage backed securities -commercial [Member] |  |
Held to maturity securities |  |
Amortized cost | 1,000 | 1,034
Gross Unrealized Gains | 1 |
Gross Unrealized Losses |  | (1)
Fair Value | 1,001 | 1,033
Obligations of U.S. government-sponsored enterprises Mortgage backed securities - residential [Member] |  |
Held to maturity securities |  |
Amortized cost | 39,380 | 40,024
Gross Unrealized Gains | 292 | 1,098
Gross Unrealized Losses | (397) | (16)
Fair Value | 39,275 | 41,106
Obligations of U.S. government-sponsored enterprises Debt securities [Member] |  |
Held to maturity securities |  |
Amortized cost | 4,460 | 4,000
Gross Unrealized Gains |  | 1
Gross Unrealized Losses | (41) |
Fair Value | 4,419 | 4,001
Private label mortgage-backed securities-residential [Member] |  |
Held to maturity securities |  |
Amortized cost | 469 | 493
Gross Unrealized Gains |  |
Gross Unrealized Losses | (5) | (6)
Fair Value | 464 | 487
Corporate securities [Member] |  |
Held to maturity securities |  |
Amortized cost | 3,000 | 3,000
Gross Unrealized Gains |  |
Gross Unrealized Losses | (172) | (242)
Fair Value | $ 2,828 | $ 2,758

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- Definition Amount of accumulated unrealized gain on investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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