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Calculations of Basic and Diluted Net Income (Loss) Per Share Attributable to Evercore Partners Inc. Common Shareholders (Parenthetical) (Detail) (Earnings Per Share, Diluted)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Earnings Per Share, Diluted
     
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]      
Antidilutive securities excluded from computation of earnings per share 8,695 10,356 13,724