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
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 7,181	$ 76,875	$ 78,980	$ 134,329
Other comprehensive income (loss):
Unrecognized gain (loss) on equity investments	(258)	(46)	(86)	(38)
Unrecognized gain (loss) on cash flow hedges	472	446	943	724
Unrecognized gain (loss) on foreign currency translation	(20,751)	(2,348)	(43,457)	(2,348)
Total other comprehensive income (loss)	(20,537)	(1,948)	(42,600)	(1,662)
Total comprehensive income (loss)	(13,356)	74,927	36,380	132,667
Total comprehensive income (loss) attributable to noncontrolling interests	(5,367)	(821)	(5,228)	(1,876)
Total comprehensive income (loss) attributable to controlling interests	$ (7,989)	$ 75,748	$ 41,608	$ 134,543