Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 24, 2011	Sep. 25, 2010	Sep. 24, 2011	Sep. 25, 2010
Consolidated Statements Of Operations [Abstract]
Net sales	$ 134,243	$ 119,212	$ 390,236	$ 333,196
Cost of goods sold	87,617	74,088	251,436	206,967
Gross profit	46,626	45,124	138,800	126,229
Selling, general and administrative expenses	26,730	24,628	79,264	70,936
Income from operations	19,896	20,496	59,536	55,293
Interest expense, net	29	57	148	180
Income before taxes	19,867	20,439	59,388	55,113
Provision for taxes	8,367	7,622	22,755	21,196
Net income	$ 11,500	$ 12,817	$ 36,633	$ 33,917
Earnings Per Share:
Basic	$ 0.64	$ 0.72	$ 2.04	$ 1.91
Diluted	$ 0.63	$ 0.71	$ 2.01	$ 1.87
Average Shares Outstanding:
Basic	17,966	17,800	17,921	17,749
Diluted	18,209	18,176	18,182	18,125