Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income		$ 888,549	$ 512,300	$ 138,280
Other comprehensive income (loss):
Unrecognized gains (losses) on equity investments		0	389	(173)
Unrecognized gains (losses) on cash flow hedges		(766)	4,409	1,898
Unrecognized actuarial gain/(loss)		246	(137)	1,522
Unrecognized gains (losses) on foreign currency translation		(46,679)	(71,964)	(23,247)
Total other comprehensive income		(47,199)	(67,303)	(20,000)
Total comprehensive income		841,350	444,997	118,280
Net and comprehensive income attributable to noncontrolling interests	[1]	(31,166)	(14,678)	(13,267)
Comprehensive income attributable to controlling interests		$ 810,184	$ 430,319	$ 105,013

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