Income Taxes (Reconciliation of Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Income Taxes [Abstract]
Income taxes at federal statutory rate	$ 29,749	$ 40,553	$ 45,820
State income taxes, net of federal income tax benefit	1,519	5,828	3,925
Other	(1,437)	(2,236)	(1,342)
Provision for income taxes	$ 29,831us-gaap_IncomeTaxExpenseBenefit	$ 44,145us-gaap_IncomeTaxExpenseBenefit	$ 48,403us-gaap_IncomeTaxExpenseBenefit
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Percent	35.10%	38.10%	37.00%

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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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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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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 other adjustments.

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