CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 86,918	$ 103,281	$ 426,404	$ 352,679
Other comprehensive (loss) income:
Foreign currency translation	(7,011)	(5,018)	(11,770)	(8,061)
Unrealized (loss) gain on available for sale securities	(3,162)	5,131	3,734	17,816
Derivative instruments	(10,013)	2,801	(32,076)	17,418
Total other comprehensive (loss) income	(20,186)	2,914	(40,112)	27,173
Comprehensive income	66,732	106,195	386,292	379,852
Comprehensive income attributable to noncontrolling interests	1,659	1,309	4,831	5,485
Comprehensive income attributable to common stockholders	$ 65,073	$ 104,886	$ 381,461	$ 374,367