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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2011
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT
4. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment at December 31 consisted of the following (in thousands):

 

                 
    2011     2010  

Manufacturing equipment

  $ 170,304     $ 173,967  

Land

    8,101       8,101  

Buildings and improvements

    53,539       53,385  

Office furniture and research equipment

    17,834       14,493  
   

 

 

   

 

 

 
      249,778       249,946  

Accumulated depreciation and amortization

    (188,894     (185,429
   

 

 

   

 

 

 
    $ 60,884     $ 64,517  
   

 

 

   

 

 

 

Depreciation expense for the years ended December 31, 2011, 2010 and 2009 was $10.9 million, $12.8 million and $14.9 million, respectively.