Property, Plant and Equipment
 6 Months Ended
Jun. 30, 2017
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment

4. 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  
  

 

 

     

 

 

  

Aggregate depreciation expenses totaled $13,233 thousand and $12,036 thousand for the six months ended June 30, 2017 and 2016, respectively.