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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Schedule Of Earnings Per Share
The following is a reconciliation of the denominators of the basic and diluted per share computations for net income attributable to HollyFrontier stockholders:
 
 
Three Months Ended March 31,
 
 
2013
 
2012
 
 
(In thousands, except per share data)
Earnings attributable to HollyFrontier stockholders
 
$
333,669

 
$
241,696

Average number of shares of common stock outstanding
 
203,515

 
208,531

Effect of dilutive variable restricted shares and performance share units
 
702

 
607

Average number of shares of common stock outstanding assuming dilution
 
204,217

 
209,138

Basic earnings per share
 
$
1.64

 
$
1.16

Diluted earnings per share
 
$
1.63

 
$
1.16