Inventories (Tables)

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories as of June 30, 2018 and December 31, 2017 were as follows:

In thousands	June 30, 2018		December 31, 2017
Raw materials	$	36,862	$	28,672
Work in process	18,199		29,427
Finished goods	23,840		23,901
	78,901		82,000
Less: Progress billings	—		(1,661		)
Total inventories	$	78,901	$	80,339