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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

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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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.

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
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Fixed interest rate related to the interest rate derivative.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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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.

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Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Amount of unrealized gain (loss) related to derivatives designated as cash flow hedging instruments, recorded in results of operations to the extent that the cash flow hedge is determined to be ineffective.

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