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Net Income Per Share (Tables)
3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Summary of Antidilutive Securities Outstanding were not Included in Computation of Diluted EPS

The following table presents securities outstanding that could potentially dilute basic EPS in the future that were not included in the computation of diluted EPS because they were antidilutive for years ended March 31, 2013 and 2012:

 

     Three Months Ended
March  31, 2013
     Three Months Ended
March  31, 2012
 

Stock options

     480,350         887,672