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DERIVATIVES (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense | $ 7,853 | $ 7,499 | $ 6,440 | $ 5,794 | $ 5,691 | $ 5,575 | $ 4,859 | $ 4,488 | $ 4,304 | $ 4,100 | $ 3,508 | $ 2,778 | $ 27,586 | $ 20,613 | $ 14,690
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount | $ 180,000 |  |  |  | $ 180,000 |  |  |  |  |  |  |  | $ 180,000 | $ 180,000 |
Weighted average pay rate | 1.64% |  |  |  | 1.64% |  |  |  |  |  |  |  | 1.64% | 1.64% |
Weighted average receive rate | 1.33% |  |  |  | 0.58% |  |  |  |  |  |  |  | 1.33% | 0.58% |
Weighted average maturity |  |  |  |  |  |  |  |  |  |  |  |  | 2 years 3 months | 3 years 3 months |
Unrealized loss, net |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,394 | $ (744) |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 898 | 2,000 |
Amount of Gain/(Loss) Recognized In OCI (Effective Portion) |  |  |  |  |  |  |  |  |  |  |  |  | 2,138 | 587 |
Amount of Gain/(Loss) Reclassified From OCI to Interest Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Gain/(Loss) Recognized in Other Non-Interest Expense (Ineffective Portion) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value | $ 1,394 |  |  |  | $ (744) |  |  |  |  |  |  |  | 1,394 | (744) |
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount | $ 317,363 |  |  |  | $ 126,810 |  |  |  |  |  |  |  | $ 317,363 | $ 126,810 |
Weighted average pay rate | 4.11% |  |  |  | 3.75% |  |  |  |  |  |  |  | 4.11% | 3.75% |
Weighted average receive rate | 3.43% |  |  |  | 2.65% |  |  |  |  |  |  |  | 3.43% | 2.65% |
Weighted average maturity |  |  |  |  |  |  |  |  |  |  |  |  | 7 years 7 months 6 days | 9 years 4 months 24 days |
Fair Value | $ 3,131 |  |  |  | $ 1,543 |  |  |  |  |  |  |  | $ 3,131 | $ 1,543 |
Other Liabilities [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount |  |  |  |  | 150,000 |  |  |  |  |  |  |  |  | 150,000 |
Fair Value |  |  |  |  | (867) |  |  |  |  |  |  |  |  | (867) |
Other Assets [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount | 180,000 |  |  |  | 30,000 |  |  |  |  |  |  |  | 180,000 | 30,000 |
Fair Value | $ 1,394 |  |  |  | $ 123 |  |  |  |  |  |  |  | $ 1,394 | $ 123 |

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- Definition Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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