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Restructuring Charges (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 28, 2013
Restructuring Reserve [Roll Forward]    
Balance at beginning $ 4,331  
Charges 1,839 6,170
Assumption changes (69) (69)
Payments (1,970) (1,970)
Balance at ending 4,131 4,131
Reduction in Force Activities
   
Restructuring Reserve [Roll Forward]    
Balance at beginning 4,331   
Charges 441 4,772
Assumption changes (69) (69)
Payments 1,970 1,970
Balance at ending 2,733 2,733
Facility Lease Obligation
   
Restructuring Reserve [Roll Forward]    
Balance at beginning      
Charges 1,398 1,398
Assumption changes      
Payments      
Balance at ending $ 1,398 $ 1,398