Commitments and Contingencies (Tables)
6 Months Ended
Jul. 01, 2012
Schedule Of Changes In The Liability For Product Warranty
     Three Months Ended     Six Months Ended  
     July 1, 2012     June 26, 2011     July 1, 2012     June 26, 2011  
     (in thousands)  

Balance at beginning of period

   $ 3,794      $ 2,985      $ 2,537      $ 3,635   

Provision for warranties issued

     1,070        978        2,587        1,340   

Settlements made

     (913 )      (1,721 )      (1,100 )      (2,465 ) 

Changes in liability for pre-existing warranties during the period

     (91 )      (404 )      (164 )      (672 ) 
  

 

 

   

 

 

   

 

 

   

 

 

 

Balance at end of period

   $ 3,860      $ 1,838      $ 3,860      $ 1,838