Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 200,058	$ 132,258	$ 561,856	$ 372,902
Cost of sales	145,860	85,191	402,251	240,779
Gross profit	54,198	47,067	159,605	132,123
Selling, general and administrative expenses	42,531	33,927	122,200	95,360
Gain on disposal of fixed assets	(150)	0	(1,146)	(7)
Gain on sale of notes receivable	0	0	0	(11,924)
Operating income	11,817	13,140	38,551	48,694
Interest expense, net	1,056	1,204	3,050	3,467
Income before income taxes	10,761	11,936	35,501	45,227
Income tax expense	2,858	3,251	9,218	11,448
Net income	$ 7,903	$ 8,685	$ 26,283	$ 33,779
Net income per common share:
Basic	$ 0.22	$ 0.24	$ 0.73	$ 0.94
Diluted	$ 0.22	$ 0.24	$ 0.72	$ 0.94