Inventories (Tables)

6 Months Ended

Jun. 30, 2016

Inventory Disclosure [Abstract]

Schedule of Inventories

As of June 30, 2016 and December 31, 2015, inventories consisted of the following:

(in thousands)	June 30, 2016	December 31, 2015
Raw materials	$36,612	$27,636
Work in process	68,142	41,823
Finished goods	40,617	36,947
Total inventories	$145,371	$106,406