Condensed Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net sales	$ 181,101	$ 177,266	$ 379,890	$ 372,773
Cost of sales	133,737	132,772	274,528	274,188
Gross profit	47,364	44,494	105,362	98,585
Selling, general and administrative expenses	37,372	35,821	78,253	77,543
Operating income	9,992	8,673	27,109	21,042
Interest expense, net	1,054	1,153	2,135	2,391
Income before income taxes	8,938	7,520	24,974	18,651
Income tax expense	3,280	2,862	9,331	7,274
Net income	5,658	4,658	15,643	11,377
Comprehensive income	$ 5,046	$ 5,482	$ 17,048	$ 14,011
Income per common share:
Basic (in dollars per share)	$ 0.17	$ 0.13	$ 0.47	$ 0.32
Diluted (in dollars per share)	$ 0.17	$ 0.13	$ 0.46	$ 0.32
Dividends declared per share (in dollars per share)	$ 0.08	$ 0.07	$ 0.16	$ 0.140