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Loss per Common Share
 12 Months Ended
Dec. 31, 2011
Loss per Common Share

3. Loss per Common Share

The following table sets forth the computation of basic and diluted loss per common share from continuing operations for the years ended December 31:

     
  2011   2010   2009
Numerator
                           
Numerator for diluted loss per common share – 
loss from continuing operations		   $ (75,559 )    $ (1,417 )    $ (9,578 ) 
Net income attributable to the noncontrolling interests     (7,754 )      (10,074 )      (5,566 ) 
Loss attributable to MDC Partners Inc. common shareholders from continuing operations     (83,313 )      (11,491 )      (15,144 ) 
Effect of dilutive securities     —       —       —  
Numerator for diluted income per common share – 
loss attributable to MDC Partners Inc. common shareholders from continuing operations		   $ (83,313 )    $ (11,491 )    $ (15,144 ) 
Denominator
                           
Denominator for basic loss per common share – 
weighted average common shares		     29,120,373       28,161,144       27,396,463  
Effect of dilutive securities:
                           
Employee stock options, warrants, and stock appreciation rights     —       —       —  
Employee restricted stock units     —       —       —  
Dilutive potential common shares     —       —       —  
Denominator for diluted loss per common share – 
adjusted weighted shares and assumed conversions		     29,120,373       28,161,144       27,396,463  
Basic loss per common share from continuing operations   $ (2.86 )    $ (0.41 )    $ (0.55 ) 
Diluted loss per common share from continuing operations   $ (2.86 )    $ (0.41 )    $ (0.55 ) 

At December 31, 2011, 2010 and 2009 convertible notes, warrants, options and other rights to purchase, 5,211,668, 4,665,293 and 5,240,879 shares of common stock, respectively, were not included in the computation of diluted loss per common share because doing so would have had an antidilutive effect.