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Income Taxes (Tables)
9 Months Ended
Sep. 30, 2011
Income Taxes 
Schedule of Income tax provision and the respective effective tax rates

 

 

 

 

For the Three Months ended

 

For the Nine Months ended

 

 

 

September 30,

 

September 30,

 

 

 

2011

 

2010

 

2011

 

2010

 

 

 

 

 

 

 

 

 

 

 

Income tax provision

 

$

10,649

 

$

7,515

 

$

32,113

 

$

22,961

 

 

 

 

 

 

 

 

 

 

 

Effective income tax rate

 

16.5

%

17.1

%

18.0

%

17.6

%