December 31,
 
 
 
2016
 
 
2015
 
                 
Finished goods
   $
29,117
    $
32,550
 
Work in process
    
54,463
      
41,358
 
Raw materials
    
33,841
      
30,830
 
Supplies
    
5,763
     
5,182
 
Total
   $
123,184
     $
109,920