Inventory (Tables)

3 Months Ended

Mar. 31, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory

The major classes of inventory were as follows:

Inventory	March 31, 2014		December 31, 2013
	(in thousands)
Raw materials	$	34,790	$	42,402
Work-in-progress	33,086		27,911
Finished goods	18,125		16,792
Total	$	86,001	$	87,105