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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 is a reconciliation of the average shares outstanding used to compute basic and diluted earnings per share. 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2014
 
2013
 
2014
 
2013
Basic weighted average common shares outstanding
134,990,382

 
132,999,781

 
134,590,994

 
132,655,172

Effect of dilutive securities
2,436,260

 
2,112,949

 
2,829,485

 
2,374,272

Diluted weighted average common shares outstanding
137,426,642

 
135,112,730

 
137,420,479

 
135,029,444


For the three months ended June 30, 2014 and June 30, 2013, 0.8 million and 2.3 million, respectively, of common shares issuable upon the exercise of stock options were anti-dilutive and were excluded from the calculation of diluted earnings per share. For the six months ended June 30, 2014 and June 30, 2013, 1.2 million and 2.7 million, respectively, of common shares issuable upon the exercise of stock options were anti-dilutive and were excluded from the calculation of diluted earnings per share.
No dividends were paid during each of the six months ended June 30, 2014 and June 30, 2013.