INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current -
Federal	$ 4,940	$ 7,295	$ 1,400
State	1,862	2,257	698
Foreign	2,982	2,629	2,092
Total current	9,784	12,181	4,190
Deferred -
Federal	2,618	2,389	686
State	(224)	123	(464)
Foreign	(1,284)	(1,508)	(4,049)
Total deferred	1,110	1,004	(3,827)
Total provision for income tax	$ 10,894	$ 13,185	$ 363