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Net Income Per Share (Tables)
 6 Months Ended
Jun. 30, 2012
Net Income Per Share [Abstract]  
Computation of Net Income Per Share
The following table sets forth the computation of Net Income Per Share for the three-month and six-month periods ended June 30, 2012 and 2011 (in thousands, except per share data):

 
 
Three Months Ended
 
 
Six Months Ended
 
 
 
June 30,
 
 
June 30,
 
 
 
2012
 
 
2011
 
 
2012
 
 
2011
 
Numerator for Basic and Diluted Earnings Per Share -
 
 
 
 
 
 
 
 
Net Income
 
$
395,778
 
 
$
295,574
 
 
$
719,787
 
 
$
429,547
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Denominator for Basic Earnings Per Share -
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted Average Shares
 
 
266,874
 
 
 
265,830
 
 
 
266,718
 
 
 
259,766
 
Potential Dilutive Common Shares -
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Stock Options/SARs
 
 
1,428
 
 
 
1,807
 
 
 
1,611
 
 
 
1,891
 
Restricted Stock and Restricted Stock Units
 
 
1,683
 
 
 
1,695
 
 
 
1,754
 
 
 
1,706
 
Denominator for Diluted Earnings Per Share -
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Adjusted Diluted Weighted Average Shares
 
 
269,985
 
 
 
269,332
 
 
 
270,083
 
 
 
263,363
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net Income Per Share
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Basic
 
$
1.48
 
 
$
1.11
 
 
$
2.70
 
 
$
1.65
 
Diluted
 
$
1.47
 
 
$
1.10
 
 
$
2.67
 
 
$
1.63