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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2015
Earnings Per Share [Abstract]  
Net Income Per Share Basic And Diluted
The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share information):
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2015
 
2014
 
2015
 
2014
Numerator:
 
 
 
 
 
 
 
Net income
$
103,275

 
$
53,024

 
$
132,162

 
$
108,963

Denominator:
 
 
 
 
 
 
 
Denominator for basic earnings per share - weighted-average shares outstanding
161,085

 
169,973

 
160,347

 
176,946

Effect of dilutive employee stock awards
942

 
918

 
1,327

 
1,300

Denominator for diluted earnings per share - weighted-average shares outstanding
162,027

 
170,891

 
161,674

 
178,246

Basic earnings per share
$
0.64

 
$
0.31

 
$
0.82

 
$
0.62

Diluted earnings per share
$
0.64

 
$
0.31

 
$
0.82

 
$
0.61

Anti-dilutive weighted-average shares from stock awards
2,426

 
4,365

 
2,514

 
4,478