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Basis of Presentation (Tables)
6 Months Ended
Jun. 30, 2012
Basis of Presentation (Tables) [Abstract]  
Weighted average shares used in the basic and diluted net income per common share

The following is a reconciliation of the weighted average shares used in the basic and diluted net income per common share calculations for the periods indicated:

   Three Months Ended Six Months Ended
   June 30, June 30,
In thousands 2012 2011 2012 2011
Basic weighted average common shares  387,159  398,631  386,764  398,032
Potentially dilutive securities:        
 Stock options and SARs  2,644  3,946  2,987  4,251
 Performance equity awards  32  23  74  12
 Restricted stock  867  1,319  998  1,408
Diluted weighted average common shares  390,702  403,919  390,823  403,703
Anti-dilutive securities excluded from computation of diluted net earnings per share

The following securities could potentially dilute earnings per share in the future, but were excluded from the computation of diluted net income per share as their effect would have been antidilutive:

   Three Months Ended Six Months Ended
   June 30, June 30,
In thousands 2012 2011 2012 2011
Stock options and SARs  3,866  2,412  3,522  2,297
Restricted stock  109  24  60  15
 Total  3,975  2,436  3,582  2,312
Schedule of Goodwill

The following table summarizes the changes in Denbury's goodwill for the period indicated:

   Six Months Ended
In thousands June 30, 2012
Balance, beginning of period $ 1,236,318
 Goodwill related to the acquisition of interests in Thompson Field(1)   127,229
Balance, end of period $ 1,363,547
     
(1)See Note 2, Acquisitions and Divestitures, for additional information regarding goodwill associated with Thompson Field.