Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventories

Schedule of inventories

	March 31,		December 31,
	2016		2015
	(in thousands)
Raw materials and supplies	$	38,132	$	31,878
Work in process		19,938		21,455
Finished goods		26,396		19,867
Total inventory		84,466		73,200
Less reserve for excess and obsolete inventories		(2,224)		(2,535)
Total inventory, net	$	82,242	$	70,665