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Income Taxes (Details 4) (USD $)
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Dec. 28, 2014
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Dec. 29, 2013
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| Income Tax Disclosure [Abstract] | ||
| Valuation allowance | $ 990,000us-gaap_DeferredTaxAssetsValuationAllowance | $ 290,000us-gaap_DeferredTaxAssetsValuationAllowance |
| Federal alternative minimum tax credit | 1,262,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax | 1,262,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax |
| General business and other tax credits | 5,100,000rrgb_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusinessAndOther | |
| Unrecognized tax benefits that would impact effective tax rate if recognized | $ 300,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate |
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- Definition
The amount before allocation of valuation allowances of deferred tax asset attributable to deductible general business tax credit carryforwards and other deductible tax credit carryforwards not separately disclosed. No definition available.
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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