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Earnings Per Common Share
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Earnings Per Common Share
Earnings Per Common Share  
 
The following is a computation of basic and diluted earnings per common share for the years ended December 31, 2013, 2012 and 2011: 
 
(in thousands, except per share data)
 
2013
 
2012
 
2011
NUMERATORS:
 
 
 
 
 
Net income
$
98,361

 
$
101,891

 
$
74,496

Less:
 
 
 
 
 
Dividends and undistributed earnings allocated to participating securities (1)
788

 
682

 
356

Net earnings available to common shareholders
$
97,573

 
$
101,209

 
$
74,140

DENOMINATORS:
 
 
 
 
 
Weighted average number of common shares outstanding - basic
111,938

 
111,935

 
114,220

Effect of potentially dilutive common shares (2)
238

 
216

 
189

Weighted average number of common shares outstanding - diluted
112,176

 
112,151

 
114,409

EARNINGS PER COMMON SHARE:
 
 
 
 
 
Basic
$
0.87

 
$
0.90

 
$
0.65

Diluted
$
0.87

 
$
0.90

 
$
0.65

 
(1)
Represents dividends paid and undistributed earnings allocated to nonvested restricted stock awards. 
(2)
Represents the effect of the assumed exercise of stock options, vesting of non-participating restricted shares, and vesting of restricted stock units, based on the treasury stock method. 

The following table presents the weighted average outstanding securities that were not included in the computation of diluted earnings per common share because their effect would be anti-dilutive for the years ended December 31, 2013, 2012 and 2011. 
 
(in thousands)
 
2013
 
2012
 
2011
Stock options
669

 
1,306

 
1,815