Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 677,288	$ 597,456
Cost of sales	487,659	422,825
Gross profit	189,629	174,631
Selling and administrative expenses	147,097	136,245
Impairment of goodwill and other assets	6,944	0
Operating income	35,588	38,386
Interest and other non-operating expenses, net	4,789	6,616
Income before income taxes and equity earnings	30,799	31,770
Income tax benefit	(25)	(802)
Equity earnings in unconsolidated investments, net	88	65
Net income	$ 30,912	$ 32,637
Earnings per share:
Basic (in dollars per share)	$ 0.77	$ 0.83
Diluted (in dollars per share)	$ 0.75	$ 0.80
Weighted average shares outstanding: [Abstract]
Basic (in shares)	40,125	39,479
Diluted (in shares)	40,955	40,696
Cash dividends declared per common share	$ 0.55	$ 0.45