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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2012
Income Taxes [Abstract]  
Schedule Of Income Tax Expense And Related Effective Rate
     For the 13 Weeks Ended
March 31, 2012
    For the 13 Weeks Ended
April 2, 2011
 

Income tax expense

   $ 23,524      $ 31,192   

Income tax rate

     27.8     34.9