INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current -
Federal	$ (6,179)	$ 4,940	$ 7,295
State	(154)	1,862	2,257
Foreign	2,663	2,982	2,629
Total current	(3,670)	9,784	12,181
Deferred -
Federal	(10,568)	2,618	2,389
State	(3,125)	(224)	123
Foreign	(1,078)	(1,284)	(1,508)
Total deferred	(14,771)	1,110	1,004
Total income tax expense (benefit)	$ (18,441)	$ 10,894	$ 13,185

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