INCOME TAXES - Components of Provisions for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 1,050	$ (1,862)	$ (18,109)
State	405	287	97
Foreign	3,449	10,313	8,479
Total current provision for (benefit from)	4,904	8,738	(9,533)
Deferred:
Federal	(25,356)	(18,939)	(2,049)
State	(5,143)	(3,702)	(214)
Foreign	(18,818)	(8,257)	(517)
Total deferred (benefit)	(49,317)	(30,898)	(2,780)
(Benefit from) income taxes	$ (44,413)	$ (22,160)	$ (12,313)