Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Net sales	$ 1,381,365	$ 1,426,727	$ 2,698,403	$ 2,845,008
Cost of goods sold	1,125,361	1,176,601	2,218,920	2,356,917
Gross profit	256,004	250,126	479,483	488,091
Selling, general and administrative expenses	107,701	102,171	208,177	203,501
Rationalization charges	6,859	2,667	18,550	6,788
Other pension and postretirement (income) expense	(409)	1,295	(816)	2,581
Income before interest and income taxes	141,853	143,993	253,572	275,221
Less interest and other debt expense	41,343	46,792	79,990	83,558
Income before income taxes	100,510	97,201	173,582	191,663
Provision for income taxes	24,413	18,311	42,321	40,744
Net income	$ 76,097	$ 78,890	$ 131,261	$ 150,919
Earnings per share
Basic net income per share (usd per share)	$ 0.71	$ 0.72	$ 1.23	$ 1.37
Diluted net income per share (usd per share)	$ 0.71	$ 0.71	$ 1.23	$ 1.36
Weighted average number of shares
Basic (in shares)	106,835	110,129	106,740	110,211
Effect of dilutive securities (in shares)	180	323	293	476
Diluted (in shares)	107,015	110,452	107,033	110,687