Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 28, 2015	Mar. 29, 2014
Income Statement [Abstract]
Net sales	$ 188,474us-gaap_SalesRevenueNet	$ 183,512us-gaap_SalesRevenueNet
Cost of goods sold	115,581us-gaap_CostOfGoodsSold	111,870us-gaap_CostOfGoodsSold
Gross profit	72,893us-gaap_GrossProfit	71,642us-gaap_GrossProfit
Selling, general and administrative expenses	39,241	34,695
Income from operations	33,652us-gaap_OperatingIncomeLoss	36,947us-gaap_OperatingIncomeLoss
Interest expense, net	52us-gaap_InterestExpense	39us-gaap_InterestExpense
Income before income taxes	33,600	36,908
Provision for income taxes	12,261us-gaap_IncomeTaxExpenseBenefit	13,357us-gaap_IncomeTaxExpenseBenefit
Net income	$ 21,339us-gaap_NetIncomeLoss	$ 23,551us-gaap_NetIncomeLoss
Earnings Per Share:
Basic	$ 0.60us-gaap_EarningsPerShareBasic	$ 0.65us-gaap_EarningsPerShareBasic
Diluted	$ 0.60us-gaap_EarningsPerShareDiluted	$ 0.64us-gaap_EarningsPerShareDiluted
Weighted Average Shares Outstanding:
Basic	35,542	36,371
Diluted	35,643	36,549

Total costs related to goods produced and sold during the reporting period.

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