INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current -
Federal	$ 7,295	$ 1,400	$ (902)
State	2,257	698	136
Foreign	2,629	2,092	602
Total current	12,181	4,190	(164)
Deferred -
Federal	2,389	686	4,174
State	123	(464)	120
Foreign	(1,508)	(4,049)	(1,607)
Total deferred	1,004	(3,827)	2,687
Total provision for income tax	$ 13,185	$ 363	$ 2,523