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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2015
Earnings Per Share [Abstract]  
Schedule of Calculation of Basic and Diluted Earnings Per Share
The following table presents the calculation of basic and diluted earnings per share for the periods indicated.
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(In thousands, except per share data)
2015
 
2014
 
2015
 
2014
Earnings per common share - basic
 
 
 
 
 
 
 
Net income
$
42,475

 
$
30,893

 
$
98,437

 
$
69,445

Dividends and undistributed earnings allocated to unvested restricted shares
(492
)
 
(462
)
 
(1,171
)
 
(1,114
)
Net income allocated to common shareholders - basic
$
41,983

 
$
30,431

 
$
97,266

 
$
68,331

Weighted average common shares outstanding
40,514

 
32,803

 
37,436

 
30,791

Earnings per common share - basic
$
1.04

 
$
0.93

 
$
2.60

 
$
2.22

Earnings per common share - diluted
 
 
 
 
 
 
 
Net income allocated to common shareholders - basic
$
41,983

 
$
30,431

 
$
97,266

 
$
68,331

Dividends and undistributed earnings allocated to unvested restricted shares
(3
)
 
(4
)
 
(41
)
 
(24
)
Net income allocated to common shareholders - diluted
$
41,980

 
$
30,427

 
$
97,225

 
$
68,307

Weighted average common shares outstanding
40,514

 
32,803

 
37,436

 
30,791

Dilutive potential common shares - stock options
100

 
124

 
96

 
132

Weighted average common shares outstanding - diluted
40,614

 
32,927

 
37,532

 
30,923

Earnings per common share - diluted
$
1.03

 
$
0.92

 
$
2.59

 
$
2.21