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Earnings Per Share Level 1 (Notes)
 9 Months Ended
Sep. 30, 2012
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
 
Nine Months Ended
 
September 30,
 
September 30,
 
2012
 
2011
 
2012
 
2011
 
(In thousands, except per
share amounts)
 
(In thousands, except per
share amounts)
Amounts attributable to common stockholders:
 
 
 
 
 
 
 
Net income:
 
 
 
 
 
 
 
Net income — basic
$
41,062

 
$
35,496

 
$
126,163

 
$
100,353

After tax interest on convertible debt
13

 
13

 
38

 
38

Net income — diluted
$
41,075

 
$
35,509

 
$
126,201

 
$
100,391

Weighted average shares (denominator):
 
 
 
 
 
 
 
Weighted average shares — basic
214,914

 
232,917

 
216,974

 
237,037

Stock options
3,425

 
2,475

 
3,211

 
2,370

Convertible debt
121

 
121

 
121

 
121

Weighted average shares — diluted
218,460

 
235,513

 
220,306

 
239,528

Net income per share:
 
 
 
 
 
 
 
Basic
$
0.19

 
$
0.15

 
$
0.58

 
$
0.42

Diluted
$
0.19

 
$
0.15

 
$
0.57

 
$
0.42


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 September 30, 2012 and September 30, 2011, total options and convertible debentures not currently included in the computation of dilutive EPS were 1.3 million and 5.1 million, respectively. For the nine months ended September 30, 2012 and September 30, 2011, total options and convertible debentures not currently included in the computation of dilutive EPS were 1.8 million and 5.5 million, respectively.