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Earnings Per Common Share (Tables)
6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Computation Of Basic And Diluted Earnings (Loss) Per Common Share
The following is a computation of basic and diluted earnings per common share for the three and six months ended June 30, 2013 and 2012
 
(in thousands, except per share data)
 
Three months ended
 
Six months ended
 
June 30,
 
June 30,
 
2013
 
2012
 
2013
 
2012
NUMERATORS:
 
 
 
 
 
 
 
Net income
$
26,253

 
$
23,277

 
$
49,614

 
$
48,780

Less:
 
 
 
 
 
 
 
Dividends and undistributed earnings allocated to participating securities (1)
197

 
162

 
380

 
329

Net earnings available to common shareholders
$
26,056

 
$
23,115

 
$
49,234

 
$
48,451

DENOMINATORS:
 
 
 
 
 
 
 
Weighted average number of common shares outstanding - basic
111,954

 
111,897

 
111,946

 
111,943

Effect of potentially dilutive common shares (2)
191

 
181

 
187

 
177

Weighted average number of common shares outstanding - diluted
112,145

 
112,078

 
112,133

 
112,120

EARNINGS PER COMMON SHARE:
 
 
 
 
 
 
 
Basic
$
0.23

 
$
0.21

 
$
0.44

 
$
0.43

Diluted
$
0.23

 
$
0.21

 
$
0.44

 
$
0.43

 
(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. 

Schedule Of Weighted Average Outstanding Securities Not Included In The Computation Of Diluted Earnings Per Common Share
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 three and six months ended June 30, 2013 and 2012
 
(in thousands)
 
Three months ended
 
Six months ended
 
June 30,
 
June 30,
 
2013
 
2012
 
2013
 
2012
Stock options
863

 
1,314

 
933

 
1,316