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Net Income Per Common Share (Tables)
12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Schedule of Basic And Diluted Earnings per Share
The following table displays a reconciliation of the information used in calculating basic and diluted net income per common share for the years ended December 31, 2017, 2016, and 2015.
 
Years Ended December 31,
(in thousands, except per share data)
2017
 
2016
 
2015
Net income
$
275,474

 
$
246,784

 
$
226,082

Dividends on preferred stock
10,238

 
10,238

 
10,238

Net income available to common shareholders
$
265,236

 
$
236,546

 
$
215,844

Weighted average common shares outstanding
121,162

 
124,389

 
132,423

Potentially dilutive shares from outstanding equity-based awards and Earnout Payments
850

 
689

 
778

Weighted average diluted common shares
122,012

 
125,078

 
133,201

Net income per common share, basic
$
2.19

 
$
1.90

 
$
1.63

Net income per common share, diluted
$
2.17

 
$
1.89

 
$
1.62