EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
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	1,700
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	157	$ 286
Interest cost	700	862
Expected return on assets	(1,506)	(1,360)
Amortization of unrecognized prior service cost	0	0
Amortization of net unrecognized loss	697	696
Net periodic pension cost	$ 48	$ 484