Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories

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

	December 31,
In thousands	2017			2016
Raw materials	$	28,672		$	24,518
Work in process	29,427			17,161
Finished goods	23,901			25,360
	82,000			67,039
Less: Progress billings	(1,661		)	(893		)
Total inventories	$	80,339		$	66,146