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Property, Plant and Equipment (Tables)
6 Months Ended
Jun. 30, 2012
Property, Plant and Equipment [Abstract]  
Summary of Property, plant and equipment

Property, plant and equipment at June 30, 2012 and December 31, 2011 consists of the following:

 

                 
    June 30,
2012
    December 31,
2011
 

Land

  $ 2,458     $ 2,458  

Buildings and improvements

    10,265       10,172  

Machinery and equipment

    84,219       83,158  

Office furniture, fixtures and equipment

    8,132       7,884  

Automotive equipment

    311       282  

Construction in progress

    14,134       2,504  
   

 

 

   

 

 

 
      119,519       106,458  

Less accumulated depreciation

    (71,070     (67,185
   

 

 

   

 

 

 
    $ 48,449     $ 39,273