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Warranty (Tables)
6 Months Ended
Jul. 02, 2011
Warranty  
Summary Of Accrued Warranty Obligation
     Six Months Ended  
     July 2, 2011     July 3, 2010  

Balance at the beginning of the year

   $ 4,554      $ 3,813   

Warranty expense

     2,167        2,594   

Warranty payments

     (2,461     (2,667
                

Balance at the end of the period

   $ 4,260      $ 3,740