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NET INCOME PER SHARE (Tables)
9 Months Ended
Sep. 30, 2011
NET INCOME PER SHARE 
Reconciliation of the numerator and denominator of basic and diluted net income per share

 
  Three Months Ended   Nine Months Ended  
 
  September 30,
2011
  September 30,
2010
  September 30,
2011
  September 30,
2010
 
 
  (in thousands, except per share data)
 

Net income

  $ 116,706   $ 219,812   $ 282,129   $ 199,984  
                   

Weighted-average shares — basic

    457,721     459,588     456,992     458,872  

Incremental shares and share equivalents

    9,141     8,585     10,048     7,073  
                   

Weighted-average shares — diluted

    466,862     468,173     467,040     465,945  
                   

Net income per share:

                         

Basic

                         

Net income per share — basic

  $ 0.25   $ 0.48   $ 0.62   $ 0.44  
                   

Diluted

                         

Net income per share — diluted

  $ 0.25   $ 0.47   $ 0.60   $ 0.43