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Net Income Per Common Share (Tables)
12 Months Ended
Dec. 31, 2015
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, 2015, 2014, and 2013.
 
Years Ended December 31,
(in thousands, except per share data)
2015
 
2014
 
2013
Net income
$
226,082

 
195,249

 
159,383

Dividends and accretion of discount on preferred stock
10,238

 
10,238

 
40,830

Net income available to common shareholders
$
215,844

 
185,011

 
118,553

Weighted average common shares outstanding, basic
132,423

 
138,495

 
127,495

Potentially dilutive shares from assumed exercise of securities or other contracts to purchase common stock
778

 
659

 
6,731

Weighted average common shares outstanding, diluted
133,201

 
139,154

 
134,226

Net income per common share, basic
$
1.63

 
1.34

 
0.93

Net income per common share, diluted
$
1.62

 
1.33

 
0.88