Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 174,429	$ 122,250
Cost of sales	124,016	79,767
Gross profit	50,413	42,483
Selling, general and administrative expenses	39,548	31,116
Gain on disposal of fixed assets	0	(7)
Gain on sale of notes receivable	0	(11,924)
Operating income	10,865	23,298
Interest expense, net	995	1,069
Income before income taxes	9,870	22,229
Income tax expense	2,565	5,503
Net income	$ 7,305	$ 16,726
Net income per common share:
Basic	$ 0.20	$ 0.47
Diluted	$ 0.20	$ 0.47