Inventories (Tables)

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories

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

	December 31,
In thousands	2018		2017
Raw materials	$	37,731	$	28,672
Work in process	18,296		29,427
Finished goods	28,438		23,901
	84,465		82,000
Less: Progress billings	—		(1,661		)
Total inventories	$	84,465	$	80,339