Inventories (Tables)

3 Months Ended

Mar. 31, 2026

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following: 

	March 31, 2026		March 31, 2025		Dec. 31, 2025
	(Dollars in thousands)
Raw materials	$	483,443	$	440,846	$	586,296
Work-in-process	259,725		214,285		204,882
Finished goods	691,396		651,648		595,089
Other	17,179		17,463		16,861
	1,451,743		1,324,242		1,403,128
Adjustment to value inventory at cost on the LIFO method	(322,994)		(268,961)		(322,994)
	$	1,128,749	$	1,055,281	$	1,080,134