Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 72,387	$ 41,315	$ 131,535	$ 73,336
Other comprehensive income:
Change in unrealized (loss)/gain on marketable securities	(231)	1,914	928	(2,129)
Foreign currency translation adjustment	(44,606)	35,003	9,572	58,032
Other comprehensive income	(44,658)	38,118	10,872	56,162
Comprehensive income	27,729	79,433	142,407	129,498
Comprehensive income attributable to noncontrolling interests	(3,109)	(5,354)	(11,886)	(9,985)
Comprehensive income attributable to the Company	24,620	74,079	130,521	119,513
Interest Rate Swap [Member]
Other comprehensive income:
Change in unrealized gain/(loss) on derivative	179	128	372	259
Foreign Exchange Option [Member]
Other comprehensive income:
Change in unrealized gain/(loss) on derivative		$ 1,073