Inventories (Tables)

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Inventories

The components of inventories at December 31 were as follows:

	2018			2017
	(Dollars in thousands)
Raw materials	$	288,860		$	233,410
Work-in-process	123,574			124,396
Finished goods	335,180			433,937
Other	13,075			12,370
	760,689			804,113
Adjustment to value inventory at cost on the LIFO method	(125,883		)	(82,823		)
	$	634,806		$	721,290