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Segment Operating Results Revenues Derived from Clients and Private Equity Funds by Geographical Areas (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Segment Reporting Information [Line Items]        
Net revenue $ 219,052 [1] $ 208,543 [1] $ 369,471 [1] $ 361,363 [1]
United States [Member]
       
Segment Reporting Information [Line Items]        
Net revenue 142,502 [1] 157,595 [1] 250,429 [1] 248,451 [1]
Europe and Other [Member]
       
Segment Reporting Information [Line Items]        
Net revenue 47,997 [1] 35,497 [1] 84,785 [1] 74,866 [1]
Latin America [Member]
       
Segment Reporting Information [Line Items]        
Net revenue $ 28,553 [1] $ 15,451 [1] $ 34,257 [1] $ 38,046 [1]
[1] Excludes Other Revenue and Interest Expense.