Income Taxes (Reconciliation of Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Income Taxes [Abstract]
Income taxes at federal statutory rate	$ 45,820	$ 41,151	$ 37,585
State income taxes, net of federal income tax benefit	3,925	2,558	2,538
Other	(1,342)	(1,687)	(1,029)
Provision for income taxes	$ 48,403	$ 42,022	$ 39,094
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%	35.00%	35.00%
Effective Income Tax Rate, Continuing Operations	37.00%	35.70%	36.40%

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

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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