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Inventories
6 Months Ended
Jul. 02, 2011
Inventories [Abstract]  
Inventories
(3) Inventories:
                 
    July 2, 2011     December 31, 2010  
 
Raw material
  $ 39,057,000     $ 33,429,000  
Work in process
    31,709,000       23,797,000  
Finished goods
    32,788,000       31,027,000  
 
 
  $ 103,554,000     $ 88,253,000