Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Net sales	$ 1,745,124	$ 1,803,101	$ 4,443,527	$ 4,648,109
Cost of goods sold	1,451,831	1,517,183	3,670,751	3,874,100
Gross profit	293,293	285,918	772,776	774,009
Selling, general and administrative expenses	106,405	84,320	314,582	287,821
Rationalization charges	19,483	6,424	38,033	13,212
Other pension and postretirement expense (income)	118	1,083	(698)	3,664
Income before interest and income taxes	167,287	194,091	420,859	469,312
Less interest and other debt expense	41,871	47,264	121,861	130,822
Income before income taxes	125,416	146,827	298,998	338,490
Provision for income taxes	25,363	36,210	67,684	76,954
Net income	$ 100,053	$ 110,617	$ 231,314	$ 261,536
Earnings per share
Basic net income per share (usd per share)	$ 0.94	$ 1.02	$ 2.17	$ 2.39
Diluted net income per share (usd per share)	$ 0.93	$ 1.02	$ 2.16	$ 2.38
Weighted average number of shares
Basic (in shares)	106,847	108,421	106,776	109,583
Effect of dilutive securities (in shares)	290	331	292	428
Diluted (in shares)	107,137	108,752	107,068	110,011