Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 659,670	$ 592,172
Cost of sales	501,065	459,578
Gross profit	158,605	132,594
Selling, general and administrative expenses	114,339	84,839
Operating profit	44,266	47,755
Interest expense, net	5,197	2,507
Income before income taxes	39,069	45,248
Provision for income taxes	10,855	10,882
Net income	$ 28,214	$ 34,366
Net income per common share:
Basic (in usd per share)	$ 1.13	$ 1.38
Diluted (in usd per share)	$ 1.12	$ 1.38
Weighted average common shares outstanding:
Basic (in shares)	25,075	24,914
Diluted (in shares)	25,143	24,929