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Property, plant and equipment (Tables)
6 Months Ended
Jun. 30, 2014
Summary of Property, Plant and Equipment (at Cost)

Property, plant and equipment (at cost) at June 30, 2014 and December 31, 2013 consists of the following:

 

     June 30,
2014
    December 31,
2013
 

Land

   $ 2,458      $ 2,458   

Buildings and improvements

     14,355        14,167   

Machinery and equipment

     105,815        94,184   

Office furniture, fixtures and equipment

     9,980        9,717   

Automotive equipment

     288        278   

Construction in progress

     2,477        10,615   
  

 

 

   

 

 

 
     135,373        131,419   

Less accumulated depreciation

     (83,752     (78,951
  

 

 

   

 

 

 
   $ 51,621      $ 52,468