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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment  
Schedule of components of property, plant and equipment, net

 

 

 
   December 31,  
 
   2013   2012  
 
   (in thousands)
  

Land, buildings and improvements

   $ 85,849   $ 83,032  

Machinery, equipment and fixtures

     79,597     73,169  

Office furniture, equipment and vehicles

     18,116     18,058  

Construction in progress

     217     325  
           
​ ​ ​ ​ ​ ​ ​ ​

 

     183,779     174,584  

Accumulated depreciation

     (109,123 )   (103,549 )
           
​ ​ ​ ​ ​ ​ ​ ​

Property, plant and equipment, net

   $ 74,656   $ 71,035  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​