CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 5,677,105	$ 4,921,943	$ 4,489,927
Cost of goods sold	4,758,689	4,054,544	3,776,183
Gross profit	918,416	867,399	713,744
Selling, general and administrative expenses	378,105	377,676	315,703
Rationalization charges	15,010	16,031	56,351
Other pension and postretirement income	(50,812)	(38,694)	(17,796)
Income before interest and income taxes	576,113	512,386	359,486
Interest and other debt expense before loss on early extinguishment of debt	108,428	103,827	105,674
Loss on early extinguishment of debt	1,372	1,481	1,676
Interest and other debt expense	109,800	105,308	107,350
Income before income taxes	466,313	407,078	252,136
Provision for income taxes	107,232	98,356	58,322
Net income	$ 359,081	$ 308,722	$ 193,814
Basic net income per share (in dollars per share)	$ 3.25	$ 2.79	$ 1.75
Diluted net income per share (in dollars per share)	$ 3.23	$ 2.77	$ 1.74