CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net sales	$ 1,090,343	$ 964,249	$ 2,991,118	$ 2,736,029
Cost of sales	817,261	709,482	2,228,086	2,019,363
Gross profit	273,082	254,767	763,032	716,666
Selling, general and administrative expenses	195,143	190,579	557,010	546,116
Depreciation expense	11,767	10,501	34,990	30,117
Amortization expense	5,016	4,552	15,045	13,237
Asset Impairment Charges	0	115	2,255	644
Total operating expenses	211,926	205,747	609,300	590,114
Income from operations	61,156	49,020	153,732	126,552
Other income (expense)
Interest expense	(5,744)	(5,773)	(17,880)	(17,385)
Other income, net	3,289	3,540	9,128	10,159
Income before income taxes	58,701	46,787	144,980	119,326
Income tax expense	13,806	13,190	34,434	29,680
Net income	$ 44,895	$ 33,597	$ 110,546	$ 89,646
Weighted average common shares outstanding
Basic (in shares)	67,141	66,685	67,001	66,681
Diluted (in shares)	67,967	67,361	67,725	67,240
Net income per common share
Basic (in dollars per share)	$ 0.67	$ 0.50	$ 1.65	$ 1.34
Diluted (in dollars per share)	$ 0.66	$ 0.50	$ 1.63	$ 1.33