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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2015
Earnings Per Share [Abstract]  
Schedule of Basic And Diluted Earnings Per Share
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