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DERIVATIVES (Detail Textuals) - Interest rate swaps - Derivative designated as a cash flow hedge - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Derivatives |  |  |  |
Notional amounts |  | $ 175,000,000 | $ 125,000,000 |
Derivative asset position net |  | 600,000 |  |
Derivative collateral |  | 1,200,000 |  |
Federal Home Loan Bank |  |  |  |
Derivatives |  |  |  |
Interest expense on derivative |  | 944,000 | $ 657,000 | $ 470,000
Reclassifications to interest expense |  | $ 944,000 |  |
Federal Home Loan Bank | Forecast |  |  |  |
Derivatives |  |  |  |
Interest expense on derivative | $ 805,000 |  |  |

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- Definition Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226016-175313 + Details
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