Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income	$ 53,272	$ 72,387	$ 123,780	$ 131,535
Other comprehensive income:
Change in unrealized (loss)/gain on marketable securities, net	(540)	(231)	6,228	928
Change in foreign currency translation adjustment, net	(35,515)	(44,606)	(2,504)	9,572
Other comprehensive(loss)/ income	(36,055)	(44,658)	3,724	10,872
Comprehensive income	17,217	27,729	127,504	142,407
Comprehensive income attributable to noncontrolling interests	(200)	(3,109)	(4,211)	(11,886)
Comprehensive income attributable to the Company	17,017	24,620	123,293	130,521
Interest Rate Swap [Member]
Other comprehensive income:
Change in unrealized gain on interest rate swaps, net		$ 179		$ 372