Inventories (Tables)

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories

As of March 31, 2017 and December 31, 2016, inventories consisted of the following:

(in thousands)	March 31, 2017	December 31, 2016
Raw materials	$39,865	$37,691
Work in process	78,177	58,715
Finished goods	32,439	37,500
Total inventories	$150,481	$133,906