INCOME TAXES (Details 2) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2016 USD ($) $ / shares	Dec. 27, 2017 subsidiary
Current:
Current income tax provision		$ 9,889	$ 21,080	$ 15,532
Deferred:
Deferred income tax provision		(5,791)	(297,336)	(2,597)
Income tax provision (benefit)		4,098	(276,256)	12,935
Operating loss carryforwards	$ 1,339,600	1,355,500	1,339,600
Deferred tax assets, other	349,154	353,209	349,154
Valuation allowance	46,283	46,751	46,283
Income tax expense, adjustment of deferred tax asset			6,300
Income tax expense, foreign income tax reserves			10,500
Decrease in foreign taxes due to tax holidays		$ 700	$ 900	$ 900
Effect on diluted per share due to decrease in foreign tax holiday (in dollars per share) | $ / shares		$ 0.04	$ 0.05	$ 0.04
2017 Subsidiary Merger
Deferred:
Income tax provision (benefit)	(284,100)
Number of wholly-owned subsidiaries merged | subsidiary					2
Operating loss carryforwards	1,300,000		$ 1,300,000
Deferred tax assets, other		$ 342,600
Operating loss carryforwards, term			17 years
Valuation allowance	$ 41,600		$ 41,600
Domestic - Luxembourg
Current:
Current income tax provision		275	737	$ 160
Deferred:
Deferred income tax provision		(4,927)	(295,318)	432
Foreign - U.S. federal
Current:
Foreign		1,838	2,405	9,556
Deferred:
Foreign		(291)	(111)	(3,065)
Foreign - U.S. state
Current:
Foreign		336	364	258
Deferred:
Foreign		134	(210)	(100)
Foreign - non-U.S.
Current:
Foreign		7,440	17,574	5,558
Deferred:
Foreign		$ (707)	$ (1,697)	$ 136