ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Loss
Balance at beginning of period	$ 3,551,801	$ 2,946,823	$ 2,010,670
Other comprehensive (loss) income before reclassifications	(7,942)	(25,226)	65,806
Amounts reclassified to earnings		(52)	(3,360)
Other comprehensive loss	(7,942)	(25,278)	62,446
Allocation of accumulated other comprehensive loss related to noncontrolling interests	(315)	(124)	(109)
Balance at end of period	3,898,318	3,551,801	2,946,823
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Loss
Balance at beginning of period	(128,726)	(103,568)	(170,149)
Other comprehensive (loss) income before reclassifications	(7,938)	(25,230)	65,799
Amounts reclassified to earnings		(52)	673
Other comprehensive loss	(7,938)	(25,282)	66,472
Allocation of accumulated other comprehensive loss related to noncontrolling interests	(315)	(124)	(109)
Balance at end of period	(136,349)	(128,726)	(103,568)
Unrealized Gains On Available-For-Sale Securities
Accumulated Other Comprehensive Loss
Balance at beginning of period	4	0	4,026
Other comprehensive (loss) income before reclassifications	(4)	4	7
Amounts reclassified to earnings		0	(4,033)
Other comprehensive loss	(4)	4	(4,026)
Allocation of accumulated other comprehensive loss related to noncontrolling interests	0	0	0
Balance at end of period	0	4	0
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss
Balance at beginning of period	(128,722)	(103,568)	(166,123)
Balance at end of period	$ (136,349)	$ (128,722)	$ (103,568)