INCOME TAXES - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current income tax provision (benefit):
Federal	$ 278	$ (2,849)	$ (31,844)
State	807	2,569	1,964
Foreign	29,707	38,770	24,108
Current income tax provision (benefit)	30,792	38,490	(5,772)
Deferred income tax provision (benefit):
Federal	(52,985)	(21,792)	(255,477)
State	(25,128)	172	(28,364)
Foreign	(1,988)	(13,059)	(1,437)
Deferred income tax benefit	(80,101)	(34,679)	(285,278)
Income tax (benefit) provision	$ (49,309)	$ 3,811	$ (291,050)