Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Schedule Of Inventories

Inventories are comprised of the following: 

	As of March 31, 2019		As of December 31, 2018
	(Dollars in thousands)
Inventories:
Raw materials	$	97,951	$	99,935
Work in process	138,664		125,767
Finished goods	63,179		68,015
Total	$	299,794	$	293,717