Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 132,258	$ 125,480	$ 372,902	$ 398,880
Cost of sales	85,191	85,894	240,779	266,799
Gross profit	47,067	39,586	132,123	132,081
Selling, general and administrative expenses	33,927	31,515	95,360	102,792
(Gain) loss on disposal of fixed assets	0	11	(7)	(87)
Impairment charges	0	0	0	916
Gain on sale of notes receivable	0	0	(11,924)	0
Operating income	13,140	8,060	48,694	28,460
Interest expense, net	1,204	993	3,467	3,059
Income from continuing operations before income taxes	11,936	7,067	45,227	25,401
Income tax expense	3,251	1,848	11,448	6,933
Income from continuing operations	8,685	5,219	33,779	18,468
Income from discontinued operations, net of income tax	0	0	0	127
Net income	$ 8,685	$ 5,219	$ 33,779	$ 18,595
Income per common share from continuing operations:
Basic	$ 0.24	$ 0.15	$ 0.94	$ 0.52
Diluted	0.24	0.15	0.94	0.52
Income (loss) per common share from discontinued operations:
Basic	0	0	0	0
Diluted	0	0	0	0
Net income per common share:
Basic	0.24	0.15	0.94	0.52
Diluted	$ 0.24	$ 0.15	$ 0.94	$ 0.52