Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 1,441,886	$ 1,238,110
Cost of goods sold	1,208,433	1,016,644
Gross profit	233,453	221,466
Selling, general and administrative expenses	100,011	97,379
Rationalization charges	1,379	10,357
Other pension and postretirement income	(11,329)	(12,819)
Income before interest and income taxes	143,392	126,549
Interest and other debt expense before loss on early extinguishment of debt	29,349	26,423
Loss on early extinguishment of debt	1,481	883
Interest and other debt expense	30,830	27,306
Income before income taxes	112,562	99,243
Provision for income taxes	27,687	25,962
Net income	$ 84,875	$ 73,281
Earnings per share
Basic net income per share (usd per share)	$ 0.77	$ 0.66
Diluted net income per share (usd per share)	$ 0.76	$ 0.66
Weighted average number of shares
Basic (in shares)	110,600	110,206
Effect of dilutive securities (in shares)	793	824
Diluted (in shares)	111,393	111,030