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Earnings Per Share
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share

Basic earnings per share is calculated as net income attributable to HollyFrontier stockholders divided by the average number of shares of common stock outstanding. Diluted earnings per share assumes, when dilutive, the issuance of the net incremental shares from variable restricted and variable performance shares. The following is a reconciliation of the denominators of the basic and diluted per share computations for net income attributable to HollyFrontier stockholders:
 
 
Years Ended December 31,
 
 
2013
 
2012
 
2011
 
 
(In thousands, except per share data)
Earnings attributable to HollyFrontier stockholders
 
$
735,842

 
$
1,727,172

 
$
1,023,397

Participating securities' share in earnings
 
2,754

 
7,648

 
3,474

Net income attributable to common shares
 
733,088

 
1,719,524

 
1,019,923

Average number of shares of common stock outstanding
 
200,419

 
204,379

 
157,948

Effect of dilutive variable restricted shares and performance share units (1)
 
815

 
895

 
808

Average number of shares of common stock outstanding assuming dilution
 
201,234

 
205,274

 
158,756

Basic earnings per share
 
$
3.66

 
$
8.41

 
$
6.46

Diluted earnings per share
 
$
3.64

 
$
8.38

 
$
6.42

 
 
 
 
 
 
 
(1) Excludes anti-dilutive restricted and performance share units of:
 
166

 
166

 
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