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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment  
Property, Plant and Equipment

4. Property, Plant and Equipment

        Property, plant and equipment consist of the following:

 
  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  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           

        Depreciation expense was $7.4 million, $6.0 million, and $6.1 million for 2013, 2012 and 2011, respectively.