EMPLOYEE BENEFIT PLANS Benefit Obligations, Plan Assets, and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Accumulated Benefit Obligation (ABO) at December 31	$ 104,649	$ 78,746
PBO at beginning of year	105,515	120,319
Service cost	4,602	5,242	$ 4,328
Interest cost	4,362	4,137	3,912
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	736	745
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	5,695	5,969	5,562
Defined Benefit Plan, Amortization of Gain (Loss)	63	46	149
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]	18,591	(11,644)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	4,459	3,892
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	63	46	149
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	11,586	(5,204)	8,742
PBO at end of year	134,852	105,515	120,319
Plan assets at beginning of year	86,556	97,182
Actual return on plan assets	12,763	(425)
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	736	745
Company contributions	3,198	372
Defined Benefit Plan, Plan Assets, Benefits Paid	4,459	3,892
Plan assets at end of year	103,385	86,556	$ 97,182
Funded status	(31,467)	(18,959)
Current liabilities	(383)	(364)
Non-current liabilities	(31,084)	(18,595)
Net pension liability at end of year	(31,467)	(18,959)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	8,890	(2,696)
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	5,505	(9,392)
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	4,591	(7,426)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	$ 8,890	$ (2,696)