Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule Of Inventories

Inventories are comprised of the following: 

	As of March 31, 2018		As of December 31, 2017
	(Dollars in thousands)
Inventories:
Raw materials	$	49,392	$	39,434
Work in process	93,578		85,852
Finished goods	59,548		48,865
Total	$	202,518	$	174,151