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Pension Plans (Tables)
6 Months Ended
Jul. 02, 2011
Pension Plans  
Schedule Of Net Periodic Defined Benefit Pension Cost
                                 
    Three Months Ended     Six Months Ended  
    July 2, 2011     July 3, 2010     July 2, 2011     July 3, 2010  
Service cost
  $ 617     $ 1,172     $ 1,337     $ 2,344  
Interest cost
    1,988       3,468       3,976       6,937  
Expected return on plan assets
    (1,828 )     (3,131 )     (3,656 )     (6,262 )
Amortization of prior service cost and net actuarial loss
                               
 
    918       1,221       1,836       2,443  
 
                       
Net periodic benefit expense
  $ 1,695     $ 2,730     $ 3,493     $ 5,462