Income Taxes - Schedule of Reconciliation of U.S. Federal Statutory Income Tax Rate to Effective Tax Rates (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%
Income of noncontrolling interests	(0.80%)	(2.40%)	(2.00%)
Share-based incentive compensation		7.40%
Foreign source (income) loss not subject to U.S. income tax	(12.70%)	(34.60%)	(13.80%)
Foreign taxes	14.10%	13.50%	8.30%
State and local taxes (primarily UBT)	2.60%	3.40%	0.90%
Change in U.S. federal valuation allowance	(14.90%)	1.40%	(8.30%)
Other, net	0.50%	1.40%	(1.00%)
Effective income tax rate	23.80%	25.10%	19.10%