RESTRUCTURING COSTS - Schedule of Restructuring liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		27 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020
Restructuring Reserve [Roll Forward]
Beginning balance	$ 2,172
Cost incurred and charged to expense	656	$ 1,673	$ 9,933
Cost paid or otherwise settled	(1,295)
Effect of change in exchange rates	(1)
Ending balance	$ 1,532		$ 1,532