Inventories (Tables)

12 Months Ended

Dec. 31, 2019

Inventories [Abstract]

Inventories

	2019		2018
	(Dollars in thousands)
Raw materials	$	80,265	$	77,836
Work in process		49,717		42,093
Finished goods		134,640		125,842
Total inventories	$	264,622	$	245,771