Inventories (Tables)

9 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories as of September 30, 2017 and December 31, 2016 were as follows:

In thousands	September 30, 2017			December 31, 2016
Raw materials	$	32,194		$	24,518
Work in process	26,191			17,161
Finished goods	23,984			25,360
	82,369			67,039
Less: Progress billings	(1,684		)	(893		)
Total inventories	$	80,685		$	66,146