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Earnings Per Share Level 1 (Notes)
 6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
Earnings Per Share
Basic earnings per common share (EPS) excludes dilution and is computed by dividing Net income attributable to common stockholders by the weighted average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other obligations to issue common stock were exercised or converted into common stock or resulted in the issuance of common shares that then shared in our earnings.
A reconciliation of the numerators and denominators of the basic and diluted EPS computations is presented below:
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2013
 
2012
 
2013
 
2012
 
(In thousands, except per
share amounts)
 
(In thousands, except per
share amounts)
Amounts attributable to common stockholders:
 
 
 
 
 
 
 
Net income:
 
 
 
 
 
 
 
Net income — basic
$
33,615

 
$
37,076

 
$
91,236

 
$
85,101

After tax interest on convertible debt
13

 
13

 
25

 
26

Net income — diluted
$
33,628

 
$
37,089

 
$
91,261

 
$
85,127

Weighted average shares (denominator):
 
 
 
 
 
 
 
Weighted average shares — basic
211,821

 
215,898

 
211,602

 
218,015

Stock options
4,004

 
2,887

 
3,880

 
2,922

Convertible debt
121

 
121

 
121

 
121

Weighted average shares — diluted
215,946

 
218,906

 
215,603

 
221,058

Net income per share:
 
 
 
 
 
 
 
Basic
$
0.16

 
$
0.17

 
$
0.43

 
$
0.39

Diluted
$
0.16

 
$
0.17

 
$
0.42

 
$
0.39


The computation of diluted EPS excludes outstanding stock options and convertible debt in certain periods in which the inclusion of such options and debt would be anti-dilutive in the periods presented. For the three months ended June 30, 2013 and June 30, 2012, total options and convertible debentures not currently included in the computation of dilutive EPS were 2.1 million and 4.3 million, respectively. For the six months ended June 30, 2013 and June 30, 2012, total options and convertible debentures not currently included in the computation of dilutive EPS were 1.6 million and 3.8 million, respectively.