Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales	$ 525,765	$ 629,068	$ 1,185,435	$ 1,221,240
Cost of sales	397,023	480,415	898,088	939,993
Gross profit	128,742	148,653	287,347	281,247
Selling, general and administrative expenses	107,960	82,996	222,299	167,835
Operating profit	20,782	65,657	65,048	113,412
Interest expense, net	3,698	2,099	8,895	4,606
Income before income taxes	17,084	63,558	56,153	108,806
Provision for income taxes	3,898	16,031	14,753	26,913
Net income	$ 13,186	$ 47,527	$ 41,400	$ 81,893
Net income per common share:
Basic (in usd per share)	$ 0.52	$ 1.90	$ 1.65	$ 3.28
Diluted (in usd per share)	$ 0.52	$ 1.89	$ 1.64	$ 3.28
Weighted average common shares outstanding:
Basic (in shares)	25,150	25,024	25,108	24,963
Diluted (in shares)	25,219	25,091	25,177	25,005