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EMPLOYEE BENEFIT PLANS, Noncontributory Defined Benefit Pension Plan (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Plan
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
EMPLOYEE BENEFIT PLANS [Abstract]      
Number of plans | Plan 2    
Employer discretionary contribution to 401 (k) plan $ 290 $ 212 $ 200
Amounts recognized in accumulated other comprehensive loss consists of [Abstract]      
Total 1,494 (543) 29
Pension Plan [Member]      
Change in benefit obligation [Roll Forward]      
Benefit obligation at beginning of year 14,020 13,027  
Service cost 380 330 289
Interest cost 270 332 588
Actuarial (Gain) / Loss (438) 1,810  
Settlement gain (17) (34)  
Benefits paid (1,092) (1,445)  
Benefit obligation at end of year 13,123 14,020 13,027
Change in plan assets [Roll Forward]      
Fair value of plan assets at beginning of year 13,247 13,277  
Actual return (loss) on plan assets 1,761 1,415  
Employer contributions 0 0  
Benefits paid (1,092) (1,445)  
Fair value of plan assets at end of year 13,916 13,247 13,277
Funded status 793 (773)  
Amounts recognized in accumulated other comprehensive loss consists of [Abstract]      
Net loss 2,491 4,383  
Prior service cost 0 0  
Total 2,491 4,383  
Components of net periodic benefit cost [Abstract]      
Service cost 380 330 289
Interest cost 270 332 588
Return on plan assets (895) (862) (924)
Partial settlement 235 302 (259)
Net amortization and deferral 336 233 272
Net periodic benefit cost 326 $ 335 $ (34)
Amounts that will be amortized from accumulated other comprehensive loss into the net periodic benefit cost in 2021, related to estimated net loss $ 142    
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]      
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 2.25% 2.00%  
Weighted-average assumptions used to determine net periodic benefit cost (income) [Abstract]      
Discount rate 2.00% 2.75% 4.00%
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 net periodic benefit cost (income) [Abstract]      
Discount rate     3.49%