Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net sales	$ 144,075	$ 132,676	$ 428,081	$ 427,998
Cost of sales	103,336	96,758	306,056	299,373
Gross profit	40,739	35,918	122,025	128,625
Selling, general and administrative expenses	36,391	32,617	105,560	103,087
(Gain) loss on disposal of fixed assets	(2,763)	315	(4,128)	383
Impairment charges	0	0	544	9,874
Operating income	7,111	2,986	20,049	15,281
Interest expense, net	1,785	2,015	5,545	6,087
Income from continuing operations before income taxes	5,326	971	14,504	9,194
Income tax expense	2,050	547	6,088	6,422
Income from continuing operations	3,276	424	8,416	2,772
Income (loss) from discontinued operations, net of income tax	(19)	(10)	(52)	(257)
Net income	$ 3,257	$ 414	$ 8,364	$ 2,515
Income per common share from continuing operations:
Basic	$ 0.11	$ 0.01	$ 0.28	$ 0.09
Diluted	0.11	0.01	0.28	0.09
Income (loss) per common share from discontinued operations:
Basic	0.00	0.00	0.00	(0.01)
Diluted	0.00	0.00	0.00	(0.01)
Net income per share:
Basic	0.11	0.01	0.28	0.08
Diluted	0.11	0.01	0.28	0.08
Dividends declared per share	$ 0.14	$ 0.14	$ 0.41	$ 0.41