INCOME TAXES - Components of Provisions for Income Taxes (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal		$ (1,862)	$ (18,109)	$ 7,389
State		287	97	3,081
Foreign		10,313	8,479	4,248
Total current provision (benefit)		8,738	(9,533)	14,718
Deferred:
Federal		(18,939)	(2,049)	(1,125)
State		(3,702)	(214)	(466)
Foreign		(8,257)	(517)	(2,807)
Total deferred benefit	[1]	(30,898)	(2,780)	(4,398)
(Benefit) provision from income taxes	[2]	$ (22,160)	$ (12,313)	$ 10,320

[1] On January 1, 2018, the Company adopted the ASC 606 revenue recognition standard and adjusted prior periods to conform. See "Note 2. Significant Accounting Policies" for additional information.

[2] On January 1, 2018, the Company adopted the ASC 606 revenue recognition standard and adjusted prior periods to conform. See "Note 2. Significant Accounting Policies" for additional information.