Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Income Statement [Abstract]
Net sales	$ 245,286	$ 234,178
Cost of sales	169,410	161,452
Gross profit	75,876	72,726
Selling and administrative expense	72,611	73,488
Operating income (loss)	3,265	(762)
Interest expense	776	656
Income (loss) before taxes	2,489	(1,418)
Income tax expense (benefit)	825	(109)
Net income (loss)	$ 1,664	$ (1,309)
Earnings (loss) per share:
Basic	$ 0.08	$ (0.06)
Diluted	0.08	(0.06)
Dividends per share	$ 0.05	$ 0.15
Weighted-average shares of common stock outstanding:
Basic	21,029	20,942
Diluted	21,054	20,942