Inventory (Tables)

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Schedule of Inventory

The major classes of inventory were as follows:

Inventory	June 30, 2013		December 31, 2012
	(in thousands)
Raw materials	$	43,821	$	40,244
Work-in-progress	22,536		26,594
Finished goods	20,393		9,517
Total	$	86,750	$	76,355