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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2011
Earnings Per Share [Abstract]  
Common Stock and Equivalents
The dilutive impact of common stock equivalents affecting EPS was as follows for the years ending Dec. 31:
 
  
2011
  
2010
  
2009
 
(Amounts in thousands,
except per share data)
 
Income
  
Share
  Per
Share
Amount
  
Income
  
Share
  Per
Share
Amount
  
Income
  
Share
  Per
Share
Amount
 
Net income
 $841,172          $755,834          $680,887         
Less: Dividend requirements on preferred stock
  (3,534)        (4,241)        (4,241)      
Less: Premium on redemption of preferred stock
  (3,260)        -         -       
Basic earnings per share:
                              
Earnings available to common shareholders
  834,378  485,039  $1.72   751,593  462,052  $1.63   676,646  456,433  $1.48 
Effect of dilutive securities:
                                 
Equity forward instruments
  -  -       -  700       -  -     
401(k) equity awards
  -  576       -  639       -  705     
Stock options
  -  -       -  -       -  1     
Diluted earnings per share:
                                 
Earnings available to common shareholders
 $834,378  485,615  $1.72  $751,593  463,391  $1.62  $676,646  457,139  $1.48