Annual report pursuant to Section 13 and 15(d)

Impairment and Restaurant Closures (Details)

v2.4.1.9
Impairment and Restaurant Closures (Details) (USD $)
3 Months Ended 12 Months Ended 3 Months Ended
Dec. 29, 2013
restaurant
Dec. 28, 2014
restaurant
Dec. 29, 2013
restaurant
Dec. 30, 2012
restaurant
Dec. 28, 2014
Restructuring Cost and Reserve [Line Items]          
Number of restaurants impaired 4rrgb_NumberOfRestaurantsImpaired 3rrgb_NumberOfRestaurantsImpaired 4rrgb_NumberOfRestaurantsImpaired 4rrgb_NumberOfRestaurantsImpaired  
Impairment of restaurants impaired   $ 1,200,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse      
Pre-tax non-cash impairment charge 1,517,000us-gaap_AssetImpairmentCharges 8,833,000us-gaap_AssetImpairmentCharges 1,517,000us-gaap_AssetImpairmentCharges 0us-gaap_AssetImpairmentCharges  
Number of restaurants closed operating below acceptable profitability levels   3rrgb_NumberOfRestaurantsClosedOperatingBelowAcceptableProfitabilityLevels   1rrgb_NumberOfRestaurantsClosedOperatingBelowAcceptableProfitabilityLevels  
Number of restaurants temporarily closed   1rrgb_NumberofRestaurantsTemporarilyClosed      
Number of restaurants closed during period whose leases were not extended or capital improvements were not projected to provide acceptable returns       2rrgb_NumberOfRestaurantsClosedLeasesNotExtendedOrCapitalImprovementsNotProjectedToProvideAcceptableReturns  
Software in development, related to supply Chain and human resource management system modules          
Restructuring Cost and Reserve [Line Items]          
Impairment of software in development         $ 7,600,000us-gaap_ImpairmentOfOngoingProject
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= rrgb_SoftwareinDevelopmentRelatedtoSupplyChainandHumanResourceManagementSystemModulesMember