Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net sales	$ 1,426,727	$ 1,543,781	$ 2,845,008	$ 2,985,667
Cost of goods sold	1,176,601	1,269,855	2,356,917	2,478,288
Gross profit	250,126	273,926	488,091	507,379
Selling, general and administrative expenses	102,171	123,830	203,501	223,841
Rationalization charges	2,667	3,428	6,788	4,807
Other pension and postretirement expense (income)	1,295	(11,349)	2,581	(22,678)
Income before interest and income taxes	143,993	158,017	275,221	301,409
Interest and other debt expense before loss on early extinguishment of debt	46,792	28,660	83,558	58,009
Loss on early extinguishment of debt	0	0	0	1,481
Interest and other debt expense	46,792	28,660	83,558	59,490
Income before income taxes	97,201	129,357	191,663	241,919
Provision for income taxes	18,311	36,682	40,744	64,369
Net income	$ 78,890	$ 92,675	$ 150,919	$ 177,550
Earnings per share
Basic net income per share (usd per share)	$ 0.72	$ 0.84	$ 1.37	$ 1.60
Diluted net income per share (usd per share)	$ 0.71	$ 0.83	$ 1.36	$ 1.59
Weighted average number of shares
Basic (in shares)	110,129	110,840	110,211	110,750
Effect of dilutive securities (in shares)	323	388	476	590
Diluted (in shares)	110,452	111,228	110,687	111,340