Segment Operating Results Revenues Derived from Clients and Private Equity Funds by Geographical Areas (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Segment Reporting Information [Line Items]
Net revenue	$ 150,419	[1]	$ 152,820	[1]
United States [Member]
Segment Reporting Information [Line Items]
Net revenue	107,927		90,856
Europe and Other [Member]
Segment Reporting Information [Line Items]
Net revenue	36,788		39,369
Latin America [Member]
Segment Reporting Information [Line Items]
Net revenue	$ 5,704		$ 22,595

[1] Excludes Other Revenue and Interest Expense.