Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 241,353	$ 280,275	$ 182,090
Other comprehensive income:
Change in unrealized gain/(loss) on marketable securities	6,773	3,013	(4,065)
Change in unrealized gain on interest rate swaps		450	549
Change in foreign currency translation adjustment, net	(4,208)	43,515	(82,228)
Other comprehensive income/(loss)	2,565	46,978	(85,744)
Comprehensive income	243,918	327,253	96,346
Comprehensive income attributable to noncontrolling interests	(6,436)	(19,702)	(11,102)
Comprehensive income attributable to the Company	237,482	307,551	85,244
Interest Rate Swap [Member]
Other comprehensive income:
Change in unrealized gain on interest rate swaps		$ 450	$ 549