INCOME TAXES - Domestic and Foreign Components of Income Before Tax and Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Domestic and foreign components of income before tax for operations [Abstract]
Domestic	$ (7,103)	$ 33,837	$ 9,399
Foreign	5,143	22,865	25,208
(Loss) income before income taxes	(1,960)	56,702	34,607
Current Federal, State and Local, Tax Expense (Benefit) [Abstract]
Current – Federal	162	4,543	444
Current – State	196	557	371
Current – Foreign	1,407	13,272	6,972
Current income tax expense	1,765	18,372	7,787
Deferred Federal, State and Local, Tax Expense (Benefit) [Abstract]
Deferred – Federal	(1,997)	1,770	98
Deferred – State	156	(290)	0
Deferred -– Foreign	(472)	2,809	(3,751)
Deferred income tax (benefit) expense	(2,313)	4,289	(3,653)
Income tax (benefit) provision	$ (548)	$ 22,661	$ 4,134