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EMPLOYEE BENEFIT PLANS, Noncontributory Defined Benefit Pension Plan (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Plan
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
EMPLOYEE BENEFIT PLANS [Abstract]      
Number of plans | Plan 2    
Employer discretionary contribution to 401 (k) plan $ 151 $ 133 $ 82
Amounts recognized in accumulated other comprehensive loss consists of [Abstract]      
Total 181 83 (258)
Pension Plan [Member]      
Change in benefit obligation [Roll Forward]      
Benefit obligation at beginning of year 19,833 18,603  
Service cost 359 349 345
Interest cost 652 671 692
Actuarial (Gain) / Loss (1,693) 1,015  
Benefits paid (1,256) (805)  
Benefit obligation at end of year 17,895 19,833 18,603
Change in plan assets [Roll Forward]      
Fair value of plan assets at beginning of year 19,992 15,786  
Actual return (loss) on plan assets (524) 2,011  
Employer contributions 0 3,000 818
Benefits paid (1,256) (805)  
Fair value of plan assets at end of year 18,212 19,992 15,786
Funded status 317 159  
Amounts recognized in accumulated other comprehensive loss consists of [Abstract]      
Net loss 3,811 4,088  
Prior service cost (80) (127)  
Total 3,731 3,961  
Components of net periodic benefit cost [Abstract]      
Service cost 359 349 345
Interest cost 652 671 692
Return on plan assets (1,126) (1,094) (1,034)
Net amortization and deferral 186 224 219
Net periodic benefit cost 71 $ 150 $ 222
Amounts that will be amortized from accumulated other comprehensive loss into the net periodic benefit cost in 2019, related to estimated net loss 290    
Amounts that will be amortized from accumulated other comprehensive loss into the net periodic benefit cost in 2019 related to prior service cost (benefit) $ (48)    
Weighted-average assumptions used to determine benefit obligations [Abstract]      
Rate of compensation increase 3.00% 3.00%  
Weighted-average assumptions used to determine net periodic benefit cost (income) [Abstract]      
Discount rate 3.35% 3.78% 3.94%
Rate of compensation increase 3.00% 3.00% 3.00%
Pension Plan [Member] | FCCB Plan [Member]      
Weighted-average assumptions used to determine benefit obligations [Abstract]      
Discount rate 4.00% 3.35%  
Weighted-average assumptions used to determine net periodic benefit cost (income) [Abstract]      
Expected long-term return on plan assets 7.00% 7.00% 7.00%
Pension Plan [Member] | FNB Plan [Member]      
Weighted-average assumptions used to determine benefit obligations [Abstract]      
Discount rate 3.49% 3.35%  
Weighted-average assumptions used to determine net periodic benefit cost (income) [Abstract]      
Expected long-term return on plan assets 3.00% 7.00% 7.00%