Inventories (Tables)

9 Months Ended

Sep. 30, 2025

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following: 

	Sept. 30, 2025		Sept. 30, 2024		Dec. 31, 2024
	(Dollars in thousands)
Raw materials	$	522,583	$	400,916	$	450,389
Work-in-process	221,628		192,986		199,030
Finished goods	529,788		486,641		530,406
Other	17,327		17,282		17,192
	1,291,326		1,097,825		1,197,017
Adjustment to value inventory at cost on the LIFO method	(268,961)		(317,382)		(268,961)
	$	1,022,365	$	780,443	$	928,056