CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 211,898	$ 169,300	$ 339,486	$ 249,398
Other comprehensive (loss) income:
Foreign currency translation	(8,586)	(15,246)	(4,759)	(3,043)
Unrealized (loss) gain on available for sale securities	(2,395)	12,857	6,896	12,685
Derivative instruments	(16,625)	6,002	(22,063)	14,617
Total other comprehensive (loss) income	(27,606)	3,613	(19,926)	24,259
Comprehensive income	184,292	172,913	319,560	273,657
Comprehensive income attributable to noncontrolling interests	1,369	2,781	3,172	4,176
Comprehensive income attributable to common stockholders	$ 182,923	$ 170,132	$ 316,388	$ 269,481

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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