Income Taxes (Tax Rate Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 30, 2014	Dec. 31, 2013	Jan. 01, 2013
Income Tax Disclosure [Abstract]
Federal income expense at federal rate	$ 6,299	$ 3,887	$ 2,848
State income tax, net of related federal income tax benefit	972	653	420
Permanent differences	170	374	83
Foreign rate differential	6	26	106
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	(241)	(149)	0
Other items, net	(84)	(24)	(242)
Total provision for income taxes	$ 7,122us-gaap_IncomeTaxExpenseBenefit	$ 4,767us-gaap_IncomeTaxExpenseBenefit	$ 3,215us-gaap_IncomeTaxExpenseBenefit
Effective income tax rate	38.40%	41.70%	38.40%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deductions. Including, but not limited to, extraterritorial income exclusion deduction, qualified production activity deduction, dividend deduction, deduction for dividend paid to employee stock ownership plan, Medicare prescription drug benefit subsidy deduction, and other deductions.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.

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