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Earnings per Share
 6 Months Ended
Jun. 30, 2012
Notes To Condensed Consolidated Financial Statements [Abstract]  
Earnings per Share
Earnings per Share
The calculation of basic and diluted earnings per share for the three and six months ended June 30, 2012 and 2011 is presented below. The sum of earnings per share amounts may not equal the totals due to rounding.
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2012
 
2011
 
2012
 
2011
Numerator:
 

 
 

 
 

 
 

Amounts attributable to common stockholders:
 

 
 

 
 

 
 

Income from continuing operations
$
99,623

 
$
101,570

 
$
238,961

 
$
189,756

(Loss) income from discontinued operations
—

 
(635
)
 
19,332

 
(2,517
)
Net income (numerator for diluted EPS)
99,623

 
100,935

 
258,293

 
187,239

Less: Preference stock dividend
(13
)
 
(14
)
 
(26
)
 
(29
)
Income attributable to common stockholders (numerator for basic EPS)
$
99,610

 
$
100,921

 
$
258,267

 
$
187,210

Denominator (in thousands):
 

 
 

 
 

 
 

Weighted-average shares used in basic EPS
200,252

 
203,171

 
200,091

 
203,372

Effect of dilutive shares:
 

 
 

 
 

 
 

Preferred stock
2

 
2

 
2

 
2

Preference stock
398

 
453

 
399

 
454

Stock plans
459

 
459

 
407

 
399

Weighted-average shares used in diluted EPS
201,111

 
204,085

 
200,899

 
204,227

Basic earnings per share:
 

 
 

 
 

 
 

Income from continuing operations
$
0.50

 
$
0.50

 
$
1.19

 
$
0.93

Income (loss) from discontinued operations
—

 
—

 
0.10

 
(0.01
)
Net income
$
0.50

 
$
0.50

 
$
1.29

 
$
0.92

Diluted earnings per share:
 

 
 

 
 

 
 

Income from continuing operations
$
0.50

 
$
0.50

 
$
1.19

 
$
0.93

Income (loss) from discontinued operations
—

 
—

 
0.10

 
(0.01
)
Net income
$
0.50

 
$
0.49

 
$
1.29

 
$
0.92

Anti-dilutive shares (in thousands):
 

 
 

 
 

 
 

Anti-dilutive shares not used in calculating diluted weighted-average shares
13,737

 
14,224

 
14,517

 
14,023