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Earnings Per Share
 6 Months Ended
Jun. 30, 2014
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 restricted shares and performance share units. The following is a reconciliation of the components of the basic and diluted per share computations for net income attributable to HollyFrontier stockholders:
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
 
2014
 
2013
 
2014
 
2013
 
 
(In thousands, except per share data)
Net income attributable to HollyFrontier stockholders
 
$
176,429

 
$
256,981

 
$
328,490

 
$
590,650

Participating securities' share in earnings
 
475

 
917

 
945

 
2,201

Net income attributable to common shares
 
$
175,954

 
$
256,064

 
$
327,545

 
$
588,449

Average number of shares of common stock outstanding
 
198,139

 
201,543

 
198,217

 
202,131

Effect of dilutive variable restricted shares and performance share units (1)
 
241

 
362

 
191

 
354

Average number of shares of common stock outstanding assuming dilution
 
198,380

 
201,905

 
198,408

 
202,485

Basic earnings per share
 
$
0.89

 
$
1.27

 
$
1.65

 
$
2.91

Diluted earnings per share
 
$
0.89

 
$
1.27

 
$
1.65

 
$
2.91

(1) Excludes anti-dilutive restricted and performance share units of:
 
26

 
232

 
2

 
248