Earnings Per Share
 12 Months Ended
Oct. 31, 2011
Earnings Per Share Disclosure [Abstract]  
Earnings per Share

18. Earnings per Share

The following table provides a reconciliation of common shares used in the earnings per basic share and earnings per diluted share computations for the years ended October 31, 2011, 2010 and 2009:

 (in thousands, except per share data)2011 20102009
 Net income allocated to:       
  Common shares$ 210,305 $ 171,623$ 128,982
  Participating restricted shares  4,597   2,675  1,125
 Total net income attributable to        
  Eaton Vance Corp. shareholders$ 214,902 $ 174,298$ 130,107
 Weighted-average shares outstanding – basic  115,326   116,444  116,175
 Incremental common shares  4,649   6,188  4,400
 Weighted-average shares outstanding – diluted  119,975   122,632  120,575
 Earnings per common share attributable to        
  Eaton Vance Corp. shareholders:       
  Basic$ 1.82 $ 1.47$ 1.11
  Diluted$ 1.75 $ 1.40$ 1.07

The Company uses the treasury stock method to account for the dilutive effect of unexercised stock options in earnings per diluted share. Antidilutive common shares related to stock options excluded from the computation of earnings per diluted share were approximately 12.1 million, 9.0 million, and 14.6 million for the years ended October 31, 2011, 2010 and 2009, respectively.