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Income Taxes
 6 Months Ended
Jun. 30, 2011
Income Taxes  
Income Taxes

5.              Income Taxes

 

Our income tax provision for the periods presented and the respective effective tax rates for such periods are as follows (in thousands, except for tax rates):

 

 

 

For the Three Months ended

 

For the Six Months ended

 

 

 

June 30,

 

June 30,

 

 

 

2011

 

2010

 

2011

 

2010

 

 

 

 

 

 

 

 

 

 

 

Income tax provision

 

$

11,049

 

$

7,765

 

$

21,464

 

$

15,446

 

 

 

 

 

 

 

 

 

 

 

Effective income tax rate

 

17.9

%

17.3

%

18.9

%

17.9

%

 

Our provision for income taxes for each of the three-month and six-month periods ended June 30, 2011 and 2010 were calculated based on the estimated effective tax rate for the full 2011 and 2010 fiscal years.  However, the actual effective tax rate for the full 2011 fiscal year may be materially different as a result of differences between estimated versus actual results and the geographic tax jurisdictions in which the results are earned.  The increased effective tax rate for the three and six months ended June 30, 2011 resulted primarily from differences in the actual and forecasted results of our subsidiaries in tax jurisdictions with different tax rates as compared to the corresponding periods in 2010.