Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
Net sales	$ 414,613	$ 356,520	$ 1,208,815	$ 1,119,429
Cost of sales	299,309	254,868	872,114	806,628
Gross profit	115,304	101,652	336,701	312,801
Selling, general and administrative expenses	90,142	80,319	265,892	242,794
Net (gain)/loss on sale of assets	53	14	21	50
Operating income	25,109	21,319	70,788	69,957
Interest expense, net	2,924	2,733	8,634	8,624
Other (income) expense, net	(71)	(176)	(234)	(590)
Earnings before income taxes	22,256	18,762	62,388	61,923
Income tax expense	7,274	5,797	21,524	20,739
Net earnings	$ 14,982	$ 12,965	$ 40,864	$ 41,184
Net earnings per share:
Basic net earnings per share	$ 0.57	$ 0.49	$ 1.55	$ 1.57
Diluted net earnings per share	$ 0.56	$ 0.49	$ 1.54	$ 1.55
Average shares outstanding:
Basic	26,455	26,339	26,380	26,250
Diluted	26,623	26,561	26,540	26,530
Dividends declared per share	$ 0.16	$ 0.16	$ 0.48	$ 0.44