Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 165,474	$ 209,422
Other comprehensive income (loss):
Unrecognized gain (loss) on equity investments		(7,549)	(11,687)
Unrecognized gain (loss) on cash flow hedges		483	(2,159)
Unrecognized actuarial gain/(loss)		2	0
Unrecognized gain (loss) on foreign currency translation		1,372	(29,197)
Total other comprehensive income (loss)		(5,692)	(43,043)
Total comprehensive income (loss), total		159,782	166,379
Total comprehensive income (loss) attributable to noncontrolling interests	[1]	15,271	(10,285)
Comprehensive income (loss) attributable to controlling interests		$ 144,511	$ 176,664

[1] (1) Includes amounts attributable to redeemable noncontrolling interests.