Income Taxes - U.S. Statutory Federal Reconciliation (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of U.S. statutory federal income tax expense to income tax expense
U.S. statutory federal tax expense	$ 254,293	$ 421,718	$ 412,159
Increase (decrease) in taxes resulting from:
State and local income taxes	11,518	7,670	7,802
Other permanent items, net	(5,828)	(9,378)	(17,517)
Noncontrolling interests	(21,873)	(47,822)	(54,359)
Foreign losses, net	55,796	27,660	(18,568)
Valuation allowance, net	(41,545)	(36,523)	15,305
Statute expirations and tax authority settlements	(7,827)	(19,331)
Other changes to unrecognized tax positions	491	5,574	9,261
Other, net	863	3,247	490
Total income tax expense	$ 245,888	$ 352,815	$ 354,573