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Noncontrolling Interest - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Jun. 30, 2014
Evercore LP [Member]
Jun. 30, 2014
ECB [Member]
Apr. 30, 2014
EWM [Member]
Jun. 30, 2014
EWM [Member]
Jun. 30, 2014
EWM [Member]
May 22, 2014
EWM [Member]
Mar. 31, 2014
EWM [Member]
Dec. 31, 2013
EWM [Member]
Jun. 30, 2014
Atalanta Sosnoff [Member]
Dec. 31, 2013
Atalanta Sosnoff [Member]
Jun. 30, 2014
Institutional Equities [Member]
Jun. 30, 2014
PCA [Member]
Jun. 30, 2013
Evercore Trust Company [Member]
Dec. 03, 2013
Pan [Member]
Jun. 30, 2014
Trilantic [Member]
Dec. 31, 2010
Trilantic [Member]
Feb. 28, 2010
Trilantic [Member]
Jun. 30, 2014
LP Units [Member]
Trilantic [Member]
Noncontrolling Interest [Line Items]                                              
Noncontrolling Interest (as a percent)           12.00% 28.00%   38.00% 38.00%       34.00%   39.00% 20.00% 14.00% 32.00%        
Net Income (Loss) Attributable to Noncontrolling Interest from Discontinued Operations   $ (23)   $ (407)                                      
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest 6 (156) 193 (39)                                      
Other Comprehensive (Income) Loss, Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest 431 (393) 477 (516)                                      
Issued LP Units (in shares)                                         500,000 500,000  
LP units convertible conversion ratio                                             1
Redemption value of issued LP units                                       16,500      
Redemption period (in years)                                       5 years      
Redemption value accretion   21   42                                      
Redeemable Noncontrolling Interest 4,283   4,283   36,805             34,577 32,523 4,283 4,283           16,090    
Commitment to purchase noncontrolling interest (in shares)               3,000                              
Commitment to purchase noncontrolling interest (as a percent)               22.00%                              
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares               119,000   119,000                          
Grant Of LP Units (in units)               11,000                              
Purchase of interest by parent               7,100                              
Ownership Parent (as a percent)                     62.00%                        
Temporary Equity, Other Changes                 34,577                            
Decrease In Treasury Stock     8,101           3,856                            
Fair Value Of Noncontrolling Interest     27,477 0         27,477                            
Increase to Additional Paid-In-Capital     $ 10,468           $ 3,244