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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Reconciliation of Numerator and Denominator of Basic Earnings Per Share with that of Diluted Earnings Per Share

The reconciliation of the numerator and denominator of basic earnings per share with that of diluted earnings per share is presented as follows:

 

     Three Months Ended      Six Months Ended  
     June 30      June 30  
     2018      2017      2018      2017  

Distributed earnings allocated to common stock

   $ 35,516      $ 34,562      $ 71,195      $ 61,284  

Undistributed earnings allocated to common stock

     30,637        2,440        56,557        14,454  
  

 

 

    

 

 

    

 

 

    

 

 

 

Net earnings allocated to common shareholders

   $ 66,153      $ 37,002      $ 127,752      $ 75,738  
  

 

 

    

 

 

    

 

 

    

 

 

 

Average common shares outstanding

     104,682,910        99,197,807        104,770,681        90,100,627  

Equivalents from stock options

     269,878        422,238        287,333        469,662  
  

 

 

    

 

 

    

 

 

    

 

 

 

Average diluted shares outstanding

     104,952,788        99,620,045        105,058,014        90,570,289  
  

 

 

    

 

 

    

 

 

    

 

 

 

Earnings per basic common share

   $ 0.63      $ 0.37      $ 1.22      $ 0.84  

Earnings per diluted common share

   $ 0.63      $ 0.37      $ 1.22      $ 0.84