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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2017
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 March 31,
(In thousands, except per share data)
2017
 
2016
Earnings per common share - basic:
 
 
 
Net income
$
50,473

 
$
42,769

Preferred stock dividends
(3,599
)
 
(2,576
)
Dividends and undistributed earnings allocated to unvested restricted shares
(346
)
 
(460
)
Net income allocated to common shareholders - basic
$
46,528

 
$
39,733

Weighted average common shares outstanding
46,123

 
40,711

Earnings per common share - basic
1.01

 
0.98

Earnings per common share - diluted:
 
 
 
Net income allocated to common shareholders - basic
$
46,528

 
$
39,733

Dividends and undistributed earnings allocated to unvested restricted shares
(37
)
 
(2
)
Net income allocated to common shareholders - diluted
$
46,491

 
$
39,731

Weighted average common shares outstanding
46,123

 
40,711

Dilutive potential common shares
373

 
54

Weighted average common shares outstanding - diluted
46,496

 
40,765

Earnings per common share - diluted
$
1.00

 
$
0.97