Inventories (Tables)

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following: 

	March 31, 2021		March 31, 2020		Dec. 31, 2020
	(Dollars in thousands)
Raw materials	$	263,580	$	261,058	$	270,066
Work-in-process	167,137		148,034		167,100
Finished goods	452,553		432,085		335,346
Other	14,955		13,126		14,610
	898,225		854,303		787,122
Adjustment to value inventory at cost on the LIFO method	(109,588)		(156,495)		(109,588)
	$	788,637	$	697,808	$	677,534