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Earnings Per Common Share
 3 Months Ended
Mar. 31, 2013
NET INCOME PER COMMON SHARE AMOUNTS:  
Earnings Per Common Share

12.       Earnings per Common Share

 

Basic income from continuing operations per common share represents income from continuing operations attributable to American Tower Corporation divided by the weighted average number of common shares outstanding during the period. Diluted income from continuing operations per common share represents income from continuing operations attributable to American Tower Corporation divided by the weighted average number of common shares outstanding during the period and any dilutive common share equivalents, including unvested restricted stock, shares issuable upon exercise of stock options as determined under the treasury stock method and upon conversion of the Company's convertible notes, as determined under the if-converted method. Dilutive common share equivalents also include the dilutive impact of the Verizon transaction (see note 13).

 

The following table sets forth basic and diluted income from continuing operations per common share computational data for the three months ended March 31, 2013 and 2012 (in thousands, except per share data):

        
   Three Months Ended March 31,
   2013 2012
       
 Income from continuing operations attributable to American Tower Corporation$ 171,407 $ 221,306
        
 Basic weighted average common shares outstanding  395,239   393,885
 Dilutive securities  4,420   4,568
 Diluted weighted average common shares outstanding  399,659   398,453
        
       
 Basic income from continuing operations attributable to American Tower Corporation per common share$ 0.43 $ 0.56
        
 Diluted income from continuing operations attributable to American Tower Corporation per common share$ 0.43 $ 0.56
        

For the three months ended March 31, 2013 and 2012, the diluted weighted average number of common shares outstanding excluded shares issuable upon exercise of the Company's stock options and share based awards of 0.4 million and 1.3 million, respectively, as the effect would be anti-dilutive.