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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2016
Earnings Per Share [Abstract]  
Basic and Diluted Earnings per share
The following table sets forth the calculation of EPS for the three and nine months ended September 30, 2016 and 2015.
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
2016
 
2015
 
2016
 
2015
 
 
(In thousands, except per share amounts)
Weighted average basic common shares outstanding
 
20,568

 
23,132

 
21,355

 
23,294

Dilutive effect of employee stock purchases, net of assumed repurchase of treasury stock
 
10

 
5

 
9

 
4

Weighted average dilutive common shares outstanding
 
20,578

 
23,137

 
21,364

 
23,298

Basic:
 
 
 
 
 
 
 
 
Net Income
 
$
35,366

 
$
45,261

 
$
116,237

 
$
127,385

Less: Earnings allocated to participating securities
 
1,427

 
1,729

 
4,652

 
4,906

 Earnings available to basic common shares
 
$
33,939

 
$
43,532

 
$
111,585

 
$
122,479

 Basic earnings per common share
 
$
1.65

 
$
1.88

 
$
5.23

 
$
5.26

Diluted:
 
 
 
 
 
 
 
 
Net Income
 
$
35,366

 
$
45,261

 
$
116,237

 
$
127,385

Less: Earnings allocated to participating securities
 
1,426

 
1,729

 
4,651

 
4,905

 Earnings available to diluted common shares
 
$
33,940

 
$
43,532

 
$
111,586

 
$
122,480

 Diluted earnings per common share
 
$
1.65

 
$
1.88

 
$
5.22

 
$
5.26