Inventories (Tables)

9 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following:

	Sept. 30, 2019			Sept. 30, 2018			Dec. 31, 2018
	(Dollars in thousands)
Raw materials	$	275,015		$	250,051		$	288,860
Work-in-process	127,590			125,336			123,574
Finished goods	413,864			384,815			335,180
Other	12,620			12,999			13,075
	829,089			773,201			760,689
Adjustment to value inventory    at cost on the LIFO method	(125,883		)	(82,823		)	(125,883		)
	$	703,206		$	690,378		$	634,806