Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Consolidated Statements of Operations [Abstract]
Net sales	$ 570,420	$ 513,432	$ 438,205
Cost of goods sold	355,211	324,165	269,273
Gross profit	215,209	189,267	168,932
Selling, general and administrative expenses	110,978	101,630	92,125
Income from operations	104,231	87,637	76,807
Interest expense, net	123	103	139
Income from continuing operations before income taxes	104,108	87,534	76,668
Provision for income taxes	37,703	31,332	28,567
Net income from continuing operations	66,405	56,202	48,101
Net income (loss) from discontinued operations	4,557	(2,925)	(1,963)
Net income	$ 70,962	$ 53,277	$ 46,138
Basic:
Net income from continuing operations	$ 1.84	$ 1.57	$ 1.35
Net income (loss) from discontinued operations	$ 0.12	$ (0.08)	$ (0.06)
Net income	$ 1.96	$ 1.49	$ 1.29
Diluted:
Net income from continuing operations	$ 1.82	$ 1.55	$ 1.33
Net income (loss) from discontinued operations	$ 0.12	$ (0.08)	$ (0.06)
Net income	$ 1.94	$ 1.47	$ 1.27
Weighted Average Shares Outstanding:
Basic	36,124	35,866	35,534
Diluted	36,494	36,370	36,232