Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 1,060,745	$ 677,288
Cost of sales	759,614	487,659
Gross profit	301,131	189,629
Selling and administrative expenses	172,100	147,097
Impairment of goodwill and other assets	0	6,944
Operating income	129,031	35,588
Interest and other non-operating expenses, net	2,582	4,789
Income before income taxes and equity earnings	126,449	30,799
Income tax provision (benefit)	27,869	(25)
Equity earnings in unconsolidated investments, net	75	88
Net income	$ 98,655	$ 30,912
Earnings per share:
Basic (in dollars per share)	$ 2.45	$ 0.77
Diluted (in dollars per share)	$ 2.42	$ 0.75
Weighted average shares outstanding: [Abstract]
Basic (in shares)	40,215	40,125
Diluted (in shares)	40,846	40,955
Cash dividends declared per common share	$ 0.58	$ 0.55