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Earnings Per Share Level 1 (Notes)
 6 Months Ended
Jun. 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
 
Six Months Ended
 
June 30,
 
June 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
$
37,076

 
$
26,093

 
$
85,101

 
$
64,857

After tax interest on convertible debt
13

 
13

 
26

 
25

Net income — diluted
$
37,089

 
$
26,106

 
$
85,127

 
$
64,882

Weighted average shares (denominator):
 
 
 
 
 
 
 
Weighted average shares — basic
215,898

 
238,498

 
218,015

 
239,131

Stock options
2,887

 
2,816

 
2,922

 
2,337

Convertible debt
121

 
121

 
121

 
121

Weighted average shares — diluted
218,906

 
241,435

 
221,058

 
241,589

Net income per share:
 
 
 
 
 
 
 
Basic
$
0.17

 
$
0.11

 
$
0.39

 
$
0.27

Diluted
$
0.17

 
$
0.11

 
$
0.39

 
$
0.27


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, 2012 and June 30, 2011, total options and convertible debentures not currently included in the computation of dilutive EPS were 4.3 million and 3.1 million, respectively. For the six months ended June 30, 2012 and June 30, 2011, total options and convertible debentures not currently included in the computation of dilutive EPS were 3.8 million and 5.4 million, respectively.