Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 81,084	$ 197,309	$ 521,432	$ 385,119
Other comprehensive income:
Change in unrealized gain on marketable securities, net	(5,871)	5,869	(44,418)	13,980
Change in unrealized loss on interest rate swaps			(475)
Change in foreign currency translation adjustment, net	(6,437)	(14,912)	(14,973)	(17,807)
Other comprehensive loss	(12,838)	(9,043)	(59,866)	(3,827)
Comprehensive income	68,246	188,266	461,566	381,292
Comprehensive income attributable to noncontrolling interests	(3,512)	(2,586)	(6,518)	(13,710)
Comprehensive income attributable to the Company	64,734	$ 185,680	455,048	$ 367,582
Interest Rate Swap [Member]
Other comprehensive income:
Change in unrealized loss on interest rate swaps	$ (530)		$ (475)