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Earnings Per Share
 3 Months Ended
Mar. 31, 2015
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income by the weighted average number of common shares outstanding plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Dilutive potential common shares include outstanding stock options and restricted stock awards. There are no differences in the numerators of our computations of basic and diluted earnings per share for any period presented.
The computation of basic and diluted earnings per share is shown below (in thousands, except per share amounts).
 
 
 
 
 
 
Three Months Ended
March 31,
 
 
 
 
 
2015
 
2014
Net income
 
 
 
 
$
23,142

 
$
14,339

Weighted average common shares outstanding
 
 
 
 
72,067

 
72,676

Dilutive effect of stock-based awards
 
 
 
 
475

 
493

Shares used in computing diluted earnings per share
 
 
 
 
72,542

 
73,169

Basic earnings per share
 
 
 
 
$
0.32

 
$
0.20

Diluted earnings per share
 
 
 
 
$
0.32

 
$
0.20


There were no options to purchase shares of common stock that were outstanding during the periods indicated above that were excluded from the computation of diluted earnings per share because the option purchase price was greater than the average market price of the common shares during the period. Performance awards are excluded from the calculation of dilutive potential common shares until the threshold performance conditions have been satisfied.