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Basic and Diluted Earnings Per Share
 3 Months Ended
Mar. 30, 2012
Basic and Diluted Earnings Per Share

4. Basic and Diluted Earnings Per Share

Basic net income per common share is computed by dividing net income attributable to GSI Group Inc. by the weighted average number of common shares outstanding during the period. For diluted net income per common share, the denominator also includes any dilutive effect of outstanding stock options, restricted stock awards and restricted stock units determined using the treasury stock method.

 

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share amounts):

 

     Three Months Ended  
     March 30,
2012		      April 1,
2011		  

Numerator:

      

Net income attributable to GSI Group Inc.

    $ 1,381       $ 6,207   
  

 

 

     

 

 

  

Denominator:

      

Weighted average common shares outstanding—basic

      33,679         33,449   

Dilutive potential common shares

      199         83   
  

 

 

     

 

 

  

Weighted average common shares outstanding—diluted

      33,878         33,532   
  

 

 

     

 

 

  

Earnings per common share:

      

Basic

    $ 0.04       $ 0.19   

Diluted

    $ 0.04       $ 0.19   

For the three months ended April 1, 2011, the weighted average outstanding stock options, restricted stock awards and restricted stock units of 53 thousand was excluded from the calculation of diluted earnings per share because of their antidilutive effect. There was no comparable amount for the three months ended March 30, 2012.