EMPLOYEE BENEFIT PLANS, Noncontributory Defined Benefit Pension Plan (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) Plan	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
EMPLOYEE BENEFIT PLANS [Abstract]
Number of plans | Plan	2
Employer discretionary contribution to 401 (k) plan	$ 82,000	$ 61,000	$ 46,000
Amounts recognized in accumulated other comprehensive loss consists of [Abstract]
Total	(258,000)	(114,000)	(1,209,000)
Pension Plan [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	17,809,000	11,777,000
Benefit obligation acquired as part of FNB acquisition	0	6,377,000
Service cost	345,000	352,000	307,000
Interest cost	692,000	424,000	415,000
Actuarial (Gain) / Loss	439,000	(456,000)
Benefits paid	(682,000)	(665,000)
Benefit obligation at end of year	18,603,000	17,809,000	11,777,000
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year	14,786,000	11,039,000
Fair value of plan assets at acquisition	0	4,053,000
Actual return (loss) on plan assets	864,000	(41,000)
Employer contributions	818,000	400,000	300,000
Benefits paid	(682,000)	(665,000)
Fair value of plan assets at end of year	15,786,000	14,786,000	11,039,000
Funded status	(2,817,000)	(3,023,000)
Amounts recognized in accumulated other comprehensive loss consists of [Abstract]
Net loss	4,263,000	3,919,000
Prior service cost	(175,000)	(222,000)
Total	4,088,000	3,697,000
Components of net periodic benefit cost [Abstract]
Service cost	345,000	352,000	307,000
Interest cost	692,000	424,000	415,000
Return on plan assets	(1,034,000)	(791,000)	(786,000)
Net amortization and deferral	219,000	205,000	51,000
Net periodic benefit cost	222,000	$ 190,000	$ (13,000)
Amounts that will be amortized from accumulated other comprehensive loss into the net periodic benefit cost in 2017, related to estimated net loss	286,000
Amounts that will be amortized from accumulated other comprehensive loss into the net periodic benefit cost in 2017 related to prior service cost (benefit)	$ (47,000)
Weighted-average assumptions used to determine benefit obligations [Abstract]
Discount rate	3.78%	3.94%
Rate of compensation increase	3.00%	3.00%
Weighted-average assumptions used to determine net periodic benefit cost (income) [Abstract]
Discount rate	3.94%	3.61%	4.30%
Expected long-term return on plan assets	7.00%	7.00%	7.50%
Rate of compensation increase	3.00%	3.00%	3.00%