Income Taxes (Reconciliation Of Income Tax Rate To Income Before Taxes From Continuing Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 27, 2016	Dec. 29, 2015	Dec. 30, 2014
Income Taxes [Abstract]
Income tax expense at federal statutory rate	$ 8,602	$ 7,527	$ 8,486
State tax expense, net	1,835	1,215	1,872
FICA tip and work opportunity credits	(3,519)	(3,428)	(3,007)
Other items, net	(110)	193	372
Total income tax expense	$ 6,808	$ 5,507	$ 7,723
Income tax expense at federal statutory rate, percentage	35.00%	35.00%	35.00%
State tax expense, net, Percentage	7.00%	6.00%	8.00%
FICA tip and work opportunity credits, Percentage	(14.00%)	(16.00%)	(12.00%)
Other items, net, Percentage	0.00%	1.00%	1.00%
Total income tax expense, Percentage	28.00%	26.00%	32.00%

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.4-08.(h)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

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Percentage 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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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 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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