Inventories (Tables)

6 Months Ended

Jun. 30, 2016

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following:

	June 30, 2016			June 30, 2015			Dec. 31, 2015
	(Dollars in thousands)
Raw materials	$	219,416		$	204,195		$	215,018
Work-in-process	131,029			121,144			118,947
Finished goods	534,124			516,931			371,561
Other	13,296			14,086			13,938
	897,865			856,356			719,464
Adjustment to value inventory
at cost on the LIFO method	(91,326		)	(103,021		)	(91,326		)
	$	806,539		$	753,335		$	628,138