INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income tax (provision) benefit	$ (16,513)	$ (816)	$ (15,291)	$ 549
Effective income tax rate	138.70%	26.60%	192.50%	28.90%
Increase in income tax provision from reduction in deferred tax assets in connection with decrease in Luxembourg statutory income tax rate	$ 12,300		$ (12,300)
Increase in foreign income taxes in connection with an internal legal entity reorganization	$ 900		$ 900
Effective income tax rate, excluding decrease in statutory income tax rate and internal legal entity reorganization	27.60%		25.90%