| Intangible Assets | 
        
   
    4) Intangible Assets  
   The following table summarizes acquired intangible assets as follows:  
     
   
   
   
   |   | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
    
   
   |   | 
     | 
     | 
   September 29, 2012 | 
     | 
     | 
   December 31, 2011 | 
     | 
    
   
   | (In thousands) | 
     | 
   
Weighted Average Life
 | 
     | 
     | 
   
Gross Carrying Amount
 | 
     | 
     | 
   
Accumulated Amortization
 | 
     | 
     | 
   
Gross Carrying Amount
 | 
     | 
     | 
   
Accumulated Amortization
 | 
     | 
    
   
   
   
   | 
    Patents 
    | 
     | 
     | 
   12 Years | 
     | 
     | 
   $ | 
   1,271 | 
     | 
     | 
   $ | 
   760 | 
     | 
     | 
   $ | 
   1,271 | 
     | 
     | 
   $ | 
   685 | 
     | 
    
   
   | 
    Trade Names 
    | 
     | 
     | 
   10 Years | 
     | 
     | 
     | 
   2,453 | 
     | 
     | 
     | 
   115 | 
     | 
     | 
     | 
   1,853 | 
     | 
     | 
     | 
   7 | 
     | 
    
   
   | 
    Completed and Unpatented Technology 
    | 
     | 
     | 
   11 Years | 
     | 
     | 
     | 
   6,377 | 
     | 
     | 
     | 
   1,606 | 
     | 
     | 
     | 
   5,277 | 
     | 
     | 
     | 
   1,242 | 
     | 
    
   
   | 
    Backlog and Customer Relationships 
    | 
     | 
     | 
   5 Years | 
     | 
     | 
     | 
   13,085 | 
     | 
     | 
     | 
   3,572 | 
     | 
     | 
     | 
   9,985 | 
     | 
     | 
     | 
   2,452 | 
     | 
    
   
   |   | 
     | 
     | 
     | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
    
   
   | 
    Total Intangible Assets 
    | 
     | 
     | 
     | 
     | 
     | 
   $ | 
   23,186 | 
     | 
     | 
   $ | 
   6,053 | 
     | 
     | 
   $ | 
   18,386 | 
     | 
     | 
   $ | 
   4,386 | 
     | 
    
   
   |   | 
     | 
     | 
     | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
    
   
    
   All acquired intangible assets other than goodwill and one trade name are being amortized. Amortization expense for acquired
   intangibles is summarized as follows:  
     
   
   
   
   |   | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
     | 
    
   
   |   | 
     | 
   Nine Months Ended | 
     | 
     | 
   Three Months Ended | 
     | 
    
   
   | (In thousands) | 
     | 
   September 29, 2012 | 
     | 
     | 
   October 1, 2011 | 
     | 
     | 
   September 29, 2012 | 
     | 
     | 
   October 1, 2011 | 
     | 
    
   
   
   
   | 
    Amortization Expense 
    | 
     | 
   $ | 
   1,667 | 
     | 
     | 
   $ | 
   320 | 
     | 
     | 
   $ | 
   1,013 | 
     | 
     | 
   $ | 
   103 | 
     | 
    
   
   |   | 
     | 
   
      
    | 
   
      
    | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
     | 
   
      
    | 
   
      
    | 
     | 
    
   
    
   Amortization expense for intangible assets for 2012 and for each of the next five years is summarized as follows:  
     
   
   
   
   |   | 
     | 
     | 
     | 
     | 
    
   
   | (In thousands) | 
     | 
     | 
     | 
    
   
   
   
   | 
    2012 
    | 
     | 
   $ | 
   2,277 | 
     | 
    
   
   | 
    2013 
    | 
     | 
     | 
   1,727 | 
     | 
    
   
   | 
    2014 
    | 
     | 
     | 
   1,518 | 
     | 
    
   
   | 
    2015 
    | 
     | 
     | 
   1,473 | 
     | 
    
   
   | 
    2016 
    | 
     | 
     | 
   1,470 | 
     | 
    
   
   | 
    2017 
    | 
     | 
     | 
   1,462 | 
     | 
    
   
    
 |