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Common And Common Equivalent Shares
 12 Months Ended
Dec. 31, 2011
Common And Common Equivalent Shares [Abstract]  
Common And Common Equivalent Shares

12.    Common and Common Equivalent Shares:

The calculation of shares used in the basic and diluted net income per share calculation for the years ended December 31, 2011, 2010 and 2009 is as follows (in thousands):

 

     Years Ended December 31,  
     2011      2010      2009  

Weighted average number of common shares outstanding

      47,706         46,630         45,573   

Weighted average number of dilutive common share equivalents

      1,090         940         898   
  

 

 

     

 

 

     

 

 

  

Weighted average number of common and common equivalent shares outstanding

      48,796         47,570         46,471   
  

 

 

     

 

 

     

 

 

  

Antidilutive securities not included in the diluted earnings per share calculation

      45         464         2,348