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EMPLOYEE BENEFIT PLANS - Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]      
Total recognized in accumulated other comprehensive income (pre-tax) $ 328 $ (90) $ (27)
Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Actuarial loss (gain) 346    
Settlement charge (13)    
Total recognized in accumulated other comprehensive income (pre-tax) 333    
Total recognized in net periodic pension cost and other comprehensive income (pre-tax) (26)    
Non-qualified Supplemental Executive Retirement Plan      
Defined Benefit Plan Disclosure [Line Items]      
Amortization of actuarial loss 21 28  
Amortization of prior service credit 0 0  
Actuarial loss (gain) 16 (50)  
Total recognized in accumulated other comprehensive income (pre-tax) (5) (78)  
Total recognized in net periodic pension cost and other comprehensive income (pre-tax) $ 132 $ 150