Inventories (Tables)

9 Months Ended

Sep. 30, 2017

Inventories [Abstract]

Inventories

Inventories consisted of the following:

	September 30,		December 31,
(in thousands)	2017		2016
Raw materials and supplies	$	34,075	$	30,687
Work-in-process		14,776		19,821
Finished goods		20,038		23,494
Total inventories	$	68,889	$	74,002