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EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 400  
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year 1,400  
Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 286 $ 225
Interest cost 862 1,123
Expected return on assets (1,360) (1,189)
Amortization of unrecognized prior service cost 0 56
Amortization of net unrecognized loss 696 765
Net periodic pension cost $ 484 $ 980