Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income		$ 1,082,070	$ 888,549	$ 512,300
Other comprehensive income (loss):
Unrecognized gains (losses) on equity investments		5,120	0	389
Unrecognized gains (losses) on cash flow hedges		1,414	(766)	4,409
Unrecognized actuarial gain/(loss)		190	246	(137)
Unrecognized gains (losses) on foreign currency translation		(85,557)	(46,679)	(71,964)
Total other comprehensive income		(78,833)	(47,199)	(67,303)
Total comprehensive income		1,003,237	841,350	444,997
Less : Total comprehensive income (loss) attributable to noncontrolling interests	[1]	6,722	(31,166)	(14,678)
Comprehensive income attributable to controlling interests		$ 996,515	$ 872,516	$ 459,675

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