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Earnings Per Share
 9 Months Ended
Sep. 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 September 30,
 
Nine Months Ended September 30,
 
 
2014
 
2013
 
2014
 
2013
 
 
(In thousands, except per share data)
Net income attributable to HollyFrontier stockholders
 
$
175,006

 
$
82,290

 
$
503,496

 
$
672,940

Participating securities' share in earnings
 
471

 
285

 
1,416

 
2,447

Net income attributable to common shares
 
$
174,535

 
$
82,005

 
$
502,080

 
$
670,493

Average number of shares of common stock outstanding
 
197,261

 
199,098

 
197,895

 
201,109

Effect of dilutive variable restricted shares and performance share units (1)
 
274

 
411

 
201

 
377

Average number of shares of common stock outstanding assuming dilution
 
197,535

 
199,509

 
198,096

 
201,486

Basic earnings per share
 
$
0.88

 
$
0.41

 
$
2.54

 
$
3.33

Diluted earnings per share
 
$
0.88

 
$
0.41

 
$
2.53

 
$
3.33

(1) Excludes anti-dilutive restricted and performance share units of:
 
195

 
251

 
214

 
1