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Earnings Per Common Share (Tables)
 3 Months Ended
Mar. 31, 2016
Earnings Per Common Share [Abstract]  
Schedule Of Basic And Diluted Earnings Per Share
The following table summarizes the calculation of basic and diluted EPS for the three months ended March 31, 2016 and 2015:
 
Three months ended
 
March 31,
 
2016
 
2015
Net income used for basic and diluted calculation
$
92,166

 
$
91,323

Shares used in computing earnings per common share—basic
225,060

 
199,361

Weighted-average effect of dilutive securities:
 
 
 
Stock awards
1,813

 
2,673

Shares used in computing earnings per common share—diluted
226,873

 
202,034

Earnings per common share:
 
 
 
Basic
$
0.41

 
$
0.46

Diluted
$
0.41

 
$
0.45