Consolidated Statements of Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Net sales	$ 825,210	$ 791,188	$ 755,654
Cost of sales	607,582	575,907	557,385
Gross profit	217,628	215,281	198,269
Selling expenses	91,739	85,519	81,475
General and administrative expenses	81,956	77,906	77,136
Impairment charges	0	0	1,249
Operating Expenses	173,695	163,425	159,860
Operating income	43,933	51,856	38,409
Interest
Income	(213)	(164)	(65)
Expense	4,755	4,679	4,787
Interest expense-net	4,542	4,515	4,722
Income before income taxes	39,391	47,341	33,687
Income tax expense	13,389	17,379	9,182
Net income	$ 26,002	$ 29,962	$ 24,505
Income per common share:
Basic (in dollars per share)	$ 0.77	$ 0.89	$ 0.71
Diluted (in dollars per share)	$ 0.76	$ 0.88	$ 0.71
Dividends declared per share (in dollars per share)	$ 0.36	$ 0.32	$ 0.28