EMPLOYEE BENEFIT PLANS - AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ (3,062)	$ 8,890	$ (2,696)
Prior Service Cost (Credit), before Tax	(37)	0
Actuarial (Gain) Loss Arising During Period, before Tax	(12,154)	11,586
Curtailment	(101)	0
Settlement	144	0
Foreign currency translation Gain Loss	196	0
Prior Service Cost (Credit), before Tax	(37)	0
Actuarial (Gain) Loss, before Tax	(3,025)	8,890
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	562	(2,329)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	$ (2,500)	$ 6,561