Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Consolidated Statements Of Income [Abstract]
Net sales	$ 250,851	$ 226,323	$ 790,629	$ 700,889
Cost of sales	194,725	184,781	625,479	568,101
Gross profit	56,126	41,542	165,150	132,788
Selling, general and administrative expenses	33,296	26,594	101,148	81,499
Executive succession			1,876
Operating profit	22,830	14,948	62,126	51,289
Interest expense, net	76	116	279	246
Income before income taxes	22,754	14,832	61,847	51,043
Provision for income taxes	7,949	5,061	22,805	18,448
Net income	$ 14,805	$ 9,771	$ 39,042	$ 32,595
Net income per common share:
Basic	$ 0.63	$ 0.43	$ 1.68	$ 1.45
Diluted	$ 0.62	$ 0.43	$ 1.65	$ 1.43
Weighted average common shares outstanding:
Basic	23,451	22,563	23,243	22,507
Diluted	23,838	22,800	23,644	22,724