Inventory (Tables)

6 Months Ended

Jun. 30, 2016

Inventory Disclosure [Abstract]

Schedule of Inventory

The major classes of inventory were as follows:

	June 30, 2016		December 31, 2015
	(in thousands)
Raw materials	$	43,397	$	31,354
Work-in-progress	19,004		21,487
Finished goods	11,723		11,743
Total	$	74,124	$	64,584