EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Supplemental Employee Retirement Plan [Member]
Net periodic pension cost
Service cost	$ 116	$ 99
Interest cost	115	131
Recognized net actuarial loss	156	61
Net period benefit cost	387	291
Other Postretirement Benefit Plan
Net periodic pension cost
Service cost	7	12
Interest cost	31	37
Recognized net actuarial loss	19	6
Amortization of prior service credit	(6)	(6)
Net period benefit cost	$ 51	$ 49