Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Income Statement [Abstract]
Net sales	$ 183,512	$ 154,443
Cost of goods sold	111,870	93,619
Gross profit	71,642	60,824
Selling, general and administrative expenses	34,695	30,916
Income from operations	36,947	29,908
Interest expense, net	39	48
Income before income taxes	36,908	29,860
Provision for income taxes	13,357	10,788
Net income	$ 23,551	$ 19,072
Earnings Per Share:
Basic	$ 0.65	$ 0.53
Diluted	$ 0.64	$ 0.52
Weighted Average Shares Outstanding:
Basic	36,371	36,316
Diluted	36,549	36,627