Segment Reporting (Reconciliation Of Restaurant-Level EBITDA To Operating Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 24, 2015	Mar. 25, 2014
Segment Reporting [Abstract]
Restaurant-level EBITDA	$ 17,122	$ 14,779
Less: Pre-opening costs	267us-gaap_PreOpeningCosts	384us-gaap_PreOpeningCosts
Less: General and administrative	5,478us-gaap_GeneralAndAdministrativeExpense	4,686us-gaap_GeneralAndAdministrativeExpense
Less: Public offering costs		5dfrg_CommonStockIssuanceCost
Less: Depreciation and amortization	3,577us-gaap_DepreciationAndAmortization	2,955us-gaap_DepreciationAndAmortization
Operating income	$ 7,800us-gaap_OperatingIncomeLoss	$ 6,749us-gaap_OperatingIncomeLoss

Common Stock Issuance Cost

No definition available.

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- Definition

Restaurant Level Earnings Before Interest Taxes Depreciation And Amortization

+ References

No definition available.

+ Details

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- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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- Definition

Expenditures associated with opening new locations which are noncapital in nature and expensed as incurred.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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