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Weighted Average Common Shares
3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Weighted Average Common Shares
Weighted Average Common Shares
The following table provides a reconciliation of the weighted average number of common shares used in the calculation of basic and diluted earnings per share (in thousands): 
 
 
Three Months Ended March 31,
 
 
2018
 
2017
Weighted average common shares for basic earnings per share
 
237,478

 
237,391

Effect of dilutive securities: unvested share awards
 
15

 
25

Weighted average common shares for diluted earnings per share
 
237,493

 
237,416