Inventories (Tables)

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Summary of Inventories

	June 30, 2019		December 31, 2018
(Dollars in thousands)
Raw materials	$	50,474	$	49,571
Work in process		45,948		42,886
Finished goods		81,559		83,121
Inventories, net	$	177,981	$	175,578