Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following:

	March 31, 2016			March 31, 2015			Dec. 31, 2015
	(Dollars in thousands)
Raw materials	$	212,445		$	192,292		$	215,018
Work-in-process	128,471			119,607			118,947
Finished goods	489,554			456,958			371,561
Other	13,827			14,342			13,938
	844,297			783,199			719,464
Adjustment to value inventory    at cost on the LIFO method	(91,326		)	(103,021		)	(91,326		)
	$	752,971		$	680,178		$	628,138