Inventories (Tables)

3 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Inventories

Inventories, which are valued at the lower of cost or net realizable value, consisted of the following:

(Dollars in thousands)	March 31, 2020		December 31, 2019
Raw materials	$	62,004	$	61,338
Work-in-process	29,999		30,043
Finished goods	35,514		41,478
Total inventories	$	127,517	$	132,859