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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Schedule of Calculation of Basic and Diluted Earnings Per Share
The computations of basic and diluted earnings per share were as follows:
 
For the Years Ended December 31,
(in thousands, except per share data)
2019
 
2018
 
2017
Earnings per common share - Basic
 
 
 
 
 
Net income
$
384,155

 
$
370,249

 
$
142,413

Preferred stock dividends
(12,602
)
 
(9,095
)
 
(9,095
)
Dividends and undistributed earnings allocated to unvested restricted shares
(3,559
)
 
(3,583
)
 
(1,210
)
Earnings allocated to common shareholders - basic
$
367,994

 
$
357,571

 
$
132,108

Weighted average common shares outstanding
52,826

 
55,008

 
50,640

Earnings per common share - basic
6.97

 
6.50

 
2.61

 
 
 
 
 
 
Earnings per common share - Diluted
 
 
 
 
 
Earnings allocated to common shareholders - basic
$
367,994

 
$
357,571

 
$
132,108

Dividends and undistributed earnings allocated to unvested restricted shares
6

 
(49
)
 
(1
)
Earnings allocated to common shareholders - diluted
$
368,000

 
$
357,522

 
$
132,107

Weighted average common shares outstanding
52,826

 
55,008

 
50,640

Dilutive potential common shares
327

 
352

 
352

Weighted average common shares outstanding - diluted
53,153

 
55,360

 
50,992

Earnings per common share - diluted
$
6.92

 
$
6.46

 
$
2.59