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Basis of Consolidation and Presentation (Tables)
 6 Months Ended
Jun. 30, 2011
Calculatation of Income Per Share From Continuing and Discontinued Operations

The following table presents information necessary to calculate income from continuing operations per share, loss from discontinued operations per share and net income per share for the three and six months ended June 30, 2011 and 2010 as well as potentially dilutive securities excluded from the weighted average number of diluted common shares outstanding, as their inclusion would have been anti-dilutive (in thousands, except per share amounts):

 

     Three Months Ended
June 30,		     Six Months Ended
June 30,		  
     2011     2010     2011     2010  

BASIC EPS:

         

Income from continuing operations

    $ 81,638      $ 29,528      $ 153,257      $ 33,714   

Adjust for income attributed to holders of non-vested restricted stock

      (648 )      (232 )      (1,145 )      (254 ) 
                                

Income from continuing operations attributed to common stockholders

    $ 80,990      $ 29,296      $ 152,112      $ 33,460   
                                

Loss from discontinued operations, net

    $ —        $ —        $ (367 )    $ —     

Adjust for loss attributed to holders of non-vested restricted stock

      —          —          3        —     
                                

Loss from discontinued operations attributed to common stockholders

    $ —        $ —        $ (364 )    $ —     
                                

Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock

      153,556        152,650        153,340        152,554   
                                

Basic income from continuing operations per common share

    $ 0.53      $ 0.19      $ 0.99      $ 0.22   

Basic loss from discontinued operations per common share

    $ 0.00      $ 0.00      $ 0.00      $ 0.00   

Basic net income per common share

    $ 0.53      $ 0.19      $ 0.99      $ 0.22   

DILUTED EPS:

         

Income from continuing operations attributed to common stockholders

    $ 80,990      $ 29,296      $ 152,112      $ 33,460   

Add incremental earnings related to potential common shares

      8        —          —          —     
                                

Adjusted income from continuing operations attributed to common stockholders

    $ 80,998      $ 29,296      $ 152,112      $ 33,460   
                                

Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock

      153,556        152,650        153,340        152,554   

Add dilutive effect of potential common shares

      2,025        221        1,912        298   
                                

Weighted average number of diluted common shares outstanding

      155,581        152,871        155,252        152,852   
                                

Diluted income from continuing operations per common share

    $ 0.52      $ 0.19      $ 0.98      $ 0.22   

Diluted loss from discontinued operations per common share

    $ 0.00      $ 0.00      $ 0.00      $ 0.00   

Diluted net income per common share

    $ 0.52      $ 0.19      $ 0.98      $ 0.22   

Potentially dilutive securities excluded as anti-dilutive

      380        6,907        1,796        6,907