Inventory (Tables)

3 Months Ended

Mar. 31, 2015

Inventory Disclosure [Abstract]

Schedule of Inventory

The major classes of inventory were as follows:

Inventory	March 31, 2015		December 31, 2014
	(in thousands)
Raw materials	$	41,994	$	40,533
Work-in-progress	71,160		34,095
Finished goods	14,271		6,822
Total	$	127,425	$	81,450