OTHER INFORMATION - Components of Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	$ (11,560,342)	$ (11,344,344)	$ (10,901,861)	$ (10,617,494)
Cumulative currency translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	(288,413)	(283,746)
Cumulative unrealized gain on securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	0	1,058
Cumulative other adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	(29,617)	(31,030)
Total accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	$ (318,030)	$ (313,718)	$ (355,469)	$ (414,528)