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Commitments, Contingencies and Legal Matters (Tables)
 6 Months Ended
Jul. 03, 2011
Commitments, Contingencies and Legal Matters [Abstract]  
Summary of changes in product warranties
         
    Accrued Warranties  
    (In thousands)  
Balance as of December 31, 2010
  $ 17,617  
Accruals for warranties issued during the period
    3,663  
Accruals related to pre-existing warranties (including changes in estimates)
    521  
Settlements made during the period (in cash or in kind)
    (4,440 )
 
     
Balance as of July 3, 2011
  $ 17,361