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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2012
Earnings Per Share  
Computation of basic and diluted earnings per share

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For the Year Ended December 31,

 

2012

 

2011

 

2010

Numerator (basic and diluted):

 

 

 

 

 

 

 

 

Net income

$
585,746 

 

$
507,673 

 

$
419,373 

 

 

 

 

 

 

 

 

 

Denominator:

 

 

 

 

 

 

 

 

Denominator for basic earnings per share - weighted-average shares

 
121,182 

 

 
134,667 

 

 
138,654 

Effect of stock options (1)

 
2,132 

 

 
2,316 

 

 
2,348 

Effect of exchangeable notes

 

 -

 

 

 -

 

 
990 

Denominator for diluted earnings per share - weighted-average shares and assumed conversion

 
123,314 

 

 
136,983 

 

 
141,992 

 

 

 

 

 

 

 

 

 

Earnings per share-basic

$
4.83 

 

$
3.77 

 

$
3.02 

Earnings per share-assuming dilution

$
4.75 

 

$
3.71 

 

$
2.95 

 

Antidilutive stock option summary

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Antidilutive common stock equivalents not included in the calculation of diluted earnings per share:

 

 

 

 

 

 

 

 

Stock options (1)

 
1,816 

 

 
1,756 

 

 
1,373 

Weighted-average exercise price per share of antidilutive stock options (1)

$
87.88 

 

$
62.79 

 

$
48.15 

 

 

 

 

 

 

 

 

 

(1) See Note 10 for further discussion on the terms of the Company's share-based compensation plans.