Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Schedule of Inventories

As of March 31, 2019 and December 31, 2018, Inventories consisted of the following:

(in thousands)	March 31, 2019	December 31, 2018
Raw materials	$47,820	$40,489
Work in process	37,582	33,181
Finished goods	16,977	12,234
Total inventories	$102,379	$85,904