Inventories (Tables)

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following:

	March 31, 2017			March 31, 2016			Dec. 31, 2016
	(Dollars in thousands)
Raw materials	$	187,897		$	212,445		$	179,451
Work-in-process	125,941			128,471			121,331
Finished goods	452,931			489,554			355,072
Other	14,504			13,827			15,528
	781,273			844,297			671,382
Adjustment to value inventory    at cost on the LIFO method	(68,419		)	(91,326		)	(68,419		)
	$	712,854		$	752,971		$	602,963