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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Reconciliation of the Average Shares Outstanding Used to Compute Basic and Diluted Earnings per Share
The following is a reconciliation of the average shares outstanding used to compute basic and diluted earnings per share: 
 
 
2016
 
2015
 
2014
Basic weighted average common shares outstanding
 
137,767,109

 
136,036,192

 
134,934,892

Effect of dilutive securities - stock awards
 

 

 

Diluted weighted average common shares outstanding
 
137,767,109

 
136,036,192

 
134,934,892