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Net Income Per Unit
9 Months Ended
Sep. 30, 2011
Net Income Per Unit [Abstract] 
Net Income Per Unit
3.
Net Income Per Unit

Basic net income per unit is derived by dividing net income by the basic weighted average number of units outstanding for each period. Diluted net income per unit is derived by adjusting net income for the assumed dilutive effect of compensatory options (“Net income – diluted”) and dividing by the diluted weighted average number of units outstanding for each period.

   
Three Months Ended
September 30,
  
Nine Months Ended
September 30,
 
   
2011
  
2010
  
2011
  
2010
 
   
(in thousands, except per unit amounts)
 
              
Net income – basic
 $27,003  $12,215  $106,195  $91,233 
Additional allocation of equity in net income attributable to AllianceBernstein resulting from assumed dilutive effect of compensatory options
  -   169   240   1,228 
Net income – diluted
 $27,003  $12,384  $106,435  $92,461 
                  
Weighted average units outstanding – basic
  103,156   100,893   103,915   101,236 
Dilutive effect of compensatory options
  -   1,444   316   1,776 
Weighted average units outstanding – diluted
  103,156   102,337   104,231   103,012 
                  
Basic net income per unit
 $0.26  $0.12  $1.02  $0.90 
Diluted net income per unit
 $0.26  $0.12  $1.02  $0.90 

For the three months and nine months ended September 30, 2011, we excluded 9,590,691 and 4,307,713, respectively, out-of-the-money options (i.e., options with an exercise price greater than the weighted average closing price of a unit for the relevant period), from the diluted net income per unit computation due to their anti-dilutive effect. For the three months and nine months ended September 30, 2010, we excluded 5,279,772 and 4,918,021, respectively, out-of-the-money options from the diluted net income per unit computation due to their anti-dilutive effect.