Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories

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

In thousands	September 30, 2018		December 31, 2017
Raw materials	$	41,182	$	28,672
Work in process	21,630		29,427
Finished goods	29,067		23,901
	91,879		82,000
Less: Progress billings	—		(1,661		)
Total inventories	$	91,879	$	80,339