Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 139,115	$ 152,568
Cost of sales	93,556	105,453
Gross profit	45,559	47,115
Selling, general and administrative expenses	34,468	35,473
(Gain) loss on disposal of fixed assets	(43)	(380)
Impairment charges	916	0
Operating income	10,218	12,022
Interest expense, net	1,049	1,639
Income from continuing operations before income taxes	9,169	10,383
Income tax expense	2,526	2,628
Income from continuing operations	6,643	7,755
Income (loss) from discontinued operations, net of income tax	127	(911)
Net income	$ 6,770	$ 6,844
Income per common share from continuing operations:
Basic	$ 0.19	$ 0.25
Diluted	0.19	0.25
Income (loss) per common share from discontinued operations:
Basic	0	(0.03)
Diluted	0	(0.03)
Net income per common share:
Basic	0.19	0.22
Diluted	$ 0.19	$ 0.22