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Per Share Data (Tables)
3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Weighted average number of common shares
The weighted average number of common shares used in the computation of basic and diluted earnings per share was as follows:
 
For the Three Months Ended March 31,
 
(In thousands)
2018
 
2017
Basic
126,375

 
121,893

Diluted
128,125

 
128,453