Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 122,250	$ 139,115
Cost of sales	79,767	93,556
Gross profit	42,483	45,559
Selling, general and administrative expenses	31,116	34,468
Gain on disposal of fixed assets	(7)	(43)
Impairment charges	0	916
Gain on sale of notes receivable	(11,924)	0
Operating income	23,298	10,218
Interest expense, net	1,069	1,049
Income from continuing operations before income taxes	22,229	9,169
Income tax expense	5,503	2,526
Income from continuing operations	16,726	6,643
Income from discontinued operations, net of income tax	0	127
Net income	$ 16,726	$ 6,770
Income per common share from continuing operations:
Basic	$ 0.47	$ 0.19
Diluted	0.47	0.19
Income (loss) per common share from discontinued operations:
Basic	0	0
Diluted	0	0
Net income per common share:
Basic	0.47	0.19
Diluted	$ 0.47	$ 0.19