NET (LOSS) INCOME PER SHARE - Reconciliation of the Numerator and Denominator of Basic and Diluted Net Loss Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
(Loss) income from continuing operations	$ (49,289)			$ (68,974)			$ (12,414)	$ 106,217
Loss from discontinued operations, net of tax	(27,918)			(6,913)			(38,769)	(41,616)
NET (LOSS) INCOME	$ (77,207)	$ (15,500)	$ 41,524	$ (75,887)	$ 10,558	$ 129,930	$ (51,183)	$ 64,601
Denominator:
For basic per share data—weighted average shares (in shares)	233,578			230,040			232,487	228,985
Dilutive effect of ordinary share equivalents (in shares)	0			0			0	4,394
For diluted per share data—weighted average shares (in shares)	233,578			230,040			232,487	233,379