Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales	$ 118,394	$ 134,285	$ 240,644	$ 273,400
Cost of sales	75,821	87,349	155,588	180,905
Gross profit	42,573	46,936	85,056	92,495
Selling, general and administrative expenses	30,317	36,809	61,433	71,277
Gain on disposal of fixed assets	0	(55)	(7)	(98)
Impairment charges	0	0	0	916
Gain on sale of notes receivable	0	0	(11,924)	0
Operating income	12,256	10,182	35,554	20,400
Interest expense, net	1,194	1,017	2,263	2,066
Income from continuing operations before income taxes	11,062	9,165	33,291	18,334
Income tax expense	2,694	2,559	8,197	5,085
Income from continuing operations	8,368	6,606	25,094	13,249
Income from discontinued operations, net of income tax	0	0	0	127
Net income	$ 8,368	$ 6,606	$ 25,094	$ 13,376
Income per common share from continuing operations:
Basic	$ 0.23	$ 0.19	$ 0.70	$ 0.37
Diluted	0.23	0.18	0.70	0.37
Income (loss) per common share from discontinued operations:
Basic	0	0	0	0
Diluted	0	0	0	0
Net income per common share:
Basic	0.23	0.19	0.70	0.37
Diluted	$ 0.23	$ 0.18	$ 0.70	$ 0.37