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Noncontrolling Interest - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Feb. 28, 2010
Dec. 31, 2012
Evercore LP
Dec. 31, 2012
ECB
Dec. 31, 2012
EWM
Dec. 31, 2011
EWM
Dec. 31, 2012
AS
Dec. 31, 2011
AS
Dec. 31, 2012
Institutional Equities
Dec. 31, 2012
Evercore Trust Company NA
Dec. 31, 2012
Trilantic
Feb. 11, 2010
Trilantic
Noncontrolling Interest [Line Items]                              
Noncontrolling Interest           20.00% 28.00% 49.00%   34.00%   38.00% 14.00%    
Net income (Loss) attributable to noncontrolling interest discontinued operation   $ (2,510) $ (1,804) $ (1,693)                      
Issued LP Units         500                   500
Cash value of redemption of LP Units Issues 16,500                            
Fair value of limited partners units exchanged 49,727 22,267           29,399 720 3,997 5,300     16,090  
Redemption value accretion $ 84 $ 84