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Common and Common Equivalent Shares:
 6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Common and Common Equivalent Shares:
7. Common and Common Equivalent Shares:

Basic net income per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per share is calculated by dividing net income by the weighted average number of common and potential common shares outstanding during the applicable period. Potential common shares consist of outstanding stock options and non-vested restricted and deferred stock calculated using the treasury stock method. Under the treasury stock method, the Company includes the assumed excess tax benefits related to the potential exercise or vesting of its stock-based awards using the difference between the average market price for the applicable period less the option price, if any, and the fair value of the stock-based award on the date of grant multiplied by the applicable tax rate.

The calculation of shares used in the basic and diluted net income per common share calculation for the three and six months ended June 30, 2014 and 2013 is as follows (in thousands):

 

     Three Months Ended
June 30,		      Six Months Ended
June 30,		  
     2014      2013      2014      2013  

Weighted average number of common shares outstanding

      98,411         99,116         98,689         98,868   

Weighted average number of dilutive common share equivalents

      1,455         1,982         1,537         2,074   
  

 

 

     

 

 

     

 

 

     

 

 

  

Weighted average number of common and common equivalent shares outstanding

      99,866         101,098         100,226         100,942   
  

 

 

     

 

 

     

 

 

     

 

 

  

Antidilutive securities not included in the dilutive earnings per share calculation

      —             138         —             68