Inventories (Tables)

6 Months Ended

Jun. 30, 2021

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following: 

	June 30, 2021		June 30, 2020		Dec. 31, 2020
	(Dollars in thousands)
Raw materials	$	302,719	$	298,550	$	270,066
Work-in-process	164,655		165,505		167,100
Finished goods	534,522		499,799		335,346
Other	15,497		14,089		14,610
	1,017,393		977,943		787,122
Adjustment to value inventory at cost on the LIFO method	(109,588)		(156,495)		(109,588)
	$	907,805	$	821,448	$	677,534