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Earnings Per Share
 6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings per Share
The following table shows the information used in the calculation of our share counts for basic and diluted earnings per share:
 
For the Three Months Ended
 
For the Six Months Ended
 
June 30,
 
June 30,
 
2013
 
2014
 
2013
 
2014
Weighted average common shares outstanding
    for basic calculation
134,854,024

 
135,963,054

 
134,816,074

 
135,713,004

Add: Effect of stock options and restricted stock
201,809

 
—

 
171,517

 
—

Weighted average common shares outstanding
    for diluted calculation
135,055,833

 
135,963,054

 
134,987,591

 
135,713,004


Basic earnings per common share are calculated by dividing net income (loss) by the weighted average number of common shares outstanding. Diluted earnings per share are calculated by dividing net income (loss) by the sum of the weighted average number of common shares outstanding plus the additional common shares that would have been outstanding if potentially dilutive securities had been issued.
The weighted average common shares outstanding for the diluted earnings per share calculation excludes consideration of stock options covering 870,657 shares and 1,590,814 shares in the three and six months ended June 30, 2013, respectively.