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EMPLOYEE BENEFIT PLANS, Noncontributory Defined Benefit Pension Plan (Details)
 12 Months Ended
Dec. 31, 2017
USD ($)
Plan
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
EMPLOYEE BENEFIT PLANS [Abstract]      
Number of plans | Plan 2    
Employer discretionary contribution to 401 (k) plan $ 133,000 $ 82,000 $ 61,000
Amounts recognized in accumulated other comprehensive loss consists of [Abstract]      
Total 83,000 (258,000) (114,000)
Pension Plan [Member]      
Change in benefit obligation [Roll Forward]      
Benefit obligation at beginning of year 18,603,000 17,809,000  
Service cost 349,000 345,000 352,000
Interest cost 671,000 692,000 424,000
Actuarial (Gain) / Loss 1,015,000 439,000  
Benefits paid (805,000) (682,000)  
Benefit obligation at end of year 19,833,000 18,603,000 17,809,000
Change in plan assets [Roll Forward]      
Fair value of plan assets at beginning of year 15,786,000 14,786,000  
Actual return (loss) on plan assets 2,011,000 864,000  
Employer contributions 3,000,000 818,000 400,000
Benefits paid (805,000) (682,000)  
Fair value of plan assets at end of year 19,992,000 15,786,000 14,786,000
Funded status 159,000 (2,817,000)  
Amounts recognized in accumulated other comprehensive loss consists of [Abstract]      
Net loss 4,088,000 4,263,000  
Prior service cost (127,000) (175,000)  
Total 3,961,000 4,088,000  
Components of net periodic benefit cost [Abstract]      
Service cost 349,000 345,000 352,000
Interest cost 671,000 692,000 424,000
Return on plan assets (1,094,000) (1,034,000) (791,000)
Net amortization and deferral 224,000 219,000 205,000
Net periodic benefit cost 150,000 $ 222,000 $ 190,000
Amounts that will be amortized from accumulated other comprehensive loss into the net periodic benefit cost in 2017, related to estimated net loss 233,000    
Amounts that will be amortized from accumulated other comprehensive loss into the net periodic benefit cost in 2017 related to prior service cost (benefit) $ (48,000)    
Weighted-average assumptions used to determine benefit obligations [Abstract]      
Discount rate 3.35% 3.78%  
Rate of compensation increase 3.00% 3.00%  
Weighted-average assumptions used to determine net periodic benefit cost (income) [Abstract]      
Discount rate 3.78% 3.94% 3.61%
Expected long-term return on plan assets 7.00% 7.00% 7.00%
Rate of compensation increase 3.00% 3.00% 3.00%