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INVENTORIES
3 Months Ended
Mar. 31, 2018
INVENTORIES  
INVENTORIES

9.     INVENTORIES

 

Inventories consist of the following:

 

(in thousands)  

March 31,

2018

    December 31, 
2017
 
Raw materials and supplies   $ 22,922     $ 20,116  
Work in process     10,450       8,300  
Finished goods     10,668       9,590  
Total inventories   $ 44,040     $ 38,006