Property, Plant and Equipment (Tables)
6 Months Ended
Jun. 30, 2017
Property, Plant and Equipment [Abstract]  
Summary of Property, Plant and Equipment

Property, plant and equipment as of June 30, 2017 and December 31, 2016 are comprised of the following (in thousands):

 

     June 30,
2017
     December 31,
2016
 

Buildings and related structures

   $ 65,791      $ 64,939  

Machinery and equipment

     276,350        255,618  

Others

     32,439        29,492  
  

 

 

    

 

 

 
     374,580        350,049  

Less: accumulated depreciation

     (203,630      (184,521

Land

     15,128        14,265  
  

 

 

    

 

 

 

Property, plant and equipment, net

   $ 186,078      $ 179,793