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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Computation Of Basic And Diluted Earnings Per Common Share
The computation of basic and diluted earnings per common share is as follows:
 
Three Months Ended
 
March 31,
(In thousands, except per share amounts)
2013
 
2012
Computation of Basic Earnings Per Share:
 
 
 
Net income
$
15,523

 
$
19,997

Income allocated to participating securities
(163
)
 
(204
)
Net income available to common shareholders
$
15,360

 
$
19,793

Weighted average common shares outstanding – basic
57,720

 
57,622

Basic earnings per share
$
0.27

 
$
0.34

Computation of Diluted Earnings Per Share:
 
 
 
Net income
$
15,523

 
$
19,997

Income allocated to participating securities
(162
)
 
(204
)
Net income available to common shareholders
$
15,361

 
$
19,793

Weighted average common shares outstanding – basic
57,720

 
57,622

Diluted effect of stock options and PVRSUs
361

 
100

Weighted average shares outstanding – diluted
58,081

 
57,722

Diluted earnings per share
$
0.26

 
$
0.34