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Earnings Per Share
 12 Months Ended
Sep. 30, 2012
Earnings Per Share  
Earnings Per Share

12.   Earnings Per Share

        The following table sets forth the number of weighted-average shares used to compute basic and diluted EPS:

 
   Fiscal Year Ended  
 
   September 30,
2012 		  October 2,
2011 		  October 3,
2010 		 
 
   (in thousands, except per share data)
  
  
    
    
    
  

Net income attributable to Tetra Tech

   $ 104,380   $ 90,039   $ 76,819  
               

Weighted-average common shares outstanding – basic

    
63,217		    
62,053		    
61,430		  

Effect of diluted stock options and unvested restricted stock

     717     722     657  
               

Weighted-average common stock outstanding – diluted

     63,934     62,775     62,087  
               

Earnings per share attributable to Tetra Tech:

                    

Basic

   $ 1.65   $ 1.45   $ 1.25  
               

Diluted

   $ 1.63   $ 1.43   $ 1.24  
               

        For fiscal 2012, 2011 and 2010, 1.9 million, 2.6 million and 3.1 million options were excluded from the calculation of dilutive potential common shares, respectively. These options were not included in the computation of dilutive potential common shares because the assumed proceeds per share exceeded the average market price per share for that period. Therefore, their inclusion would have been anti-dilutive.