Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 25, 2011	Jun. 30, 2012	Jun. 25, 2011
Consolidated Statements of Operations [Abstract]
Net sales	$ 144,172	$ 126,957	$ 278,995	$ 247,214
Cost of goods sold	91,026	81,324	175,373	156,774
Gross profit	53,146	45,633	103,622	90,440
Selling, general and administrative expenses	27,419	25,061	53,488	49,927
Income from operations	25,727	20,572	50,134	40,513
Interest expense, net	38	31	52	83
Income from continuing operations before income taxes	25,689	20,541	50,082	40,430
Provision for income taxes	9,583	7,660	18,682	14,401
Net income from continuing operations	16,106	12,881	31,400	26,029
Net income (loss) from discontinued operations	3,636	(134)	3,920	(896)
Net income	$ 19,742	$ 12,747	$ 35,320	$ 25,133
Basic:
Net income from continuing operations	$ 0.45	$ 0.36	$ 0.87	$ 0.73
Net income (loss) from discontinued operations	$ 0.10	$ 0.00	$ 0.11	$ (0.03)
Net income	$ 0.55	$ 0.36	$ 0.98	$ 0.70
Diluted:
Net income from continuing operations	$ 0.44	$ 0.35	$ 0.86	$ 0.71
Net income (loss) from discontinued operations	$ 0.10	$ 0.00	$ 0.11	$ (0.02)
Net income	$ 0.54	$ 0.35	$ 0.97	$ 0.69
Weighted Average Shares Outstanding:
Basic	36,058	35,850	36,014	35,796
Diluted	36,636	36,455	36,573	36,406