Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales	$ 125,480	$ 135,219	$ 398,880	$ 428,347
Cost of sales	85,894	93,128	266,799	291,150
Gross profit	39,586	42,091	132,081	137,197
Selling, general and administrative expenses	31,515	34,381	102,792	104,360
(Gain) loss on disposal of fixed assets	11	218	(87)	(96)
Impairment charges	0	0	916	308
Other expenses	0	33,331	0	33,331
Operating income (loss)	8,060	(25,839)	28,460	(706)
Interest expense, net	993	883	3,059	3,835
Income (loss) from continuing operations before income taxes	7,067	(26,722)	25,401	(4,541)
Income tax expense (benefit)	1,848	(5,585)	6,933	233
Income (loss) from continuing operations	5,219	(21,137)	18,468	(4,774)
Income (loss) from discontinued operations, net of income tax	0	(2)	127	(913)
Net income (loss)	$ 5,219	$ (21,139)	$ 18,595	$ (5,687)
Income (loss) per common share from continuing operations:
Basic	$ 0.15	$ (0.60)	$ 0.52	$ (0.15)
Diluted	0.15	(0.60)	0.52	(0.15)
Income (loss) per common share from discontinued operations:
Basic	0	0	0	(0.02)
Diluted	0	0	0	(0.02)
Net income (loss) per common share:
Basic	0.15	(0.60)	0.52	(0.17)
Diluted	$ 0.15	$ (0.60)	$ 0.52	$ (0.17)