Inventories

3 Months Ended

Mar. 31, 2016

Inventories [Abstract]

Inventories

3.Inventories

Inventories consisted of the following:

	March 31,		December 31,
(in thousands)	2016		2015
Raw materials and supplies	$	25,710	$	23,099
Work-in-process		42,352		37,209
Finished goods		20,138		16,628
Total inventories	$	88,200	$	76,936