Inventories (Tables)

6 Months Ended

Jun. 30, 2016

Inventories

Schedule of inventories

	June 30,		December 31,
	2016		2015
	(in thousands)
Raw materials and supplies	$	42,574	$	31,878
Work in process		16,654		21,455
Finished goods		30,739		19,867
Total inventory		89,967		73,200
Less reserve for excess and obsolete inventories		(1,640)		(2,535)
Total inventory, net	$	88,327	$	70,665