Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales	$ 558,062	$ 601,538	$ 623,649
Cost of sales	393,422	423,260	462,370
Gross profit	164,640	178,278	161,279
Selling expenses	60,440	60,752	60,261
General and administrative expenses	78,158	86,665	78,400
Operating expenses excluding impairment charges	138,598	147,417	138,661
Impairment charges	9,874	0	0
Operating income	16,168	30,861	22,618
Interest
Income	(1,774)	(1,317)	(127)
Expense	9,947	10,316	8,662
Interest expense, net	8,173	8,999	8,535
Income from continuing operations before income taxes	7,995	21,862	14,083
Income tax expense	6,470	7,809	5,122
Income from continuing operations	1,525	14,053	8,961
Income (loss) from discontinued operations, net of income tax	(468)	3,709	(17,642)
Net income (loss)	$ 1,057	$ 17,762	$ (8,681)
Income per common share from continuing operations:
Basic	$ 0.05	$ 0.46	$ 0.28
Diluted	0.05	0.45	0.27
Income (loss) per common share from discontinued operations:
Basic	(0.02)	0.12	(0.55)
Diluted	(0.02)	0.12	(0.54)
Net income (loss) per share:
Basic	0.03	0.58	(0.27)
Diluted	0.03	0.57	(0.27)
Dividends declared per share	$ 0.54	$ 0.54	$ 0.52