Inventories

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories

Inventories are valued at the lower of cost or market. Inventories were as follows at the end of the periods noted below:

(Dollars in thousands)	March 31, 2018		December 31, 2017
Raw materials	$	47,344	$	43,092
Work-in-process	26,160		28,133
Finished goods	34,431		41,332
Total inventories	$	107,935	$	112,557