Inventory (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Schedule of Inventory

The major classes of inventory were as follows:

	March 31, 2016		December 31, 2015
	(in thousands)
Raw materials	$	37,556	$	31,354
Work-in-progress	18,298		21,487
Finished goods	12,600		11,743
Total	$	68,454	$	64,584