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INVESTMENT SECURITIES (Summary of Amortized Cost and Fair Values of Securities Held to Maturity) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Sep. 30, 2017
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Held to Maturity Securities, Amortized Cost |  |
Due within 1 year | $ 2,000 |
Due after 1 but within 5 years |  |
Due after 5 but within 10 years | 4,499 |
Due after 10 years | 963 |
Total debt securities | 7,462 |
Mortgage Backed Securities, Residential | 26,097 |
Mortgage Backed Securities, Commercial | 951 |
Amortized cost | 34,510 | $ 51,368
Held to Maturity Securities, Fair Value |  |
Due within 1 year | 1,997 |
Due after 1 but within 5 years |  |
Due after 5 but within 10 years | 4,204 |
Due after 10 years | 937 |
Total debt securities | 7,138 |
Mortgage Backed Securities, Residential | 25,707 |
Mortgage Backed Securities, Commercial | 942 |
Fair value | $ 33,787 | $ 51,241

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- Definition Carrying amount of mortgage-backed residential debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments. + References No definition available. + Details
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- Definition Amount after other than temporary impairment (OTTI) accretion, of 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 (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.6) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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