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Net Income Per Unit (Tables)
6 Months Ended
Jun. 30, 2012
Net Income Per Unit [Abstract]  
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 June 30,
  
Six Months Ended June 30,
 
   
2012
  
2011
  
2012
  
2011
 
   
(in thousands, except per unit amounts)
 
              
Net income - basic
 $21,339  $35,512  $48,038  $79,192 
Additional allocation of equity in net income attributable to AllianceBernstein resulting from assumed dilutive effect of compensatory options
  -   141   -   379 
Net income - diluted
 $21,339  $35,653  $48,038  $79,571 
                  
Weighted average units outstanding - basic
  101,424   103,969   101,595   104,339 
Dilutive effect of compensatory options
  -   556   -   682 
Weighted average units outstanding - diluted
  101,424   104,525   101,595   105,021 
                  
Basic net income per unit
 $0.21  $0.34  $0.47  $0.76 
Diluted net income per unit
 $0.21  $0.34  $0.47  $0.76