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Inventories (Tables)
 3 Months Ended
Mar. 31, 2017
Inventories  
Schedule of inventories

 

 

 

 

 

 

 

 

 

 

March 31, 

 

December 31, 

 

 

 

2017

 

2016

 

 

 

(in thousands)

 

Raw materials and supplies

    

$

33,486

    

$

36,209

 

Work in process

 

 

23,990

 

 

22,266

 

Finished goods

 

 

20,661

 

 

21,279

 

Total inventories

 

$

78,137

 

$

79,754