Quarterly report pursuant to Section 13 or 15(d)

Acquisitions of Red Robin Franchised Restaurants (Details)

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Acquisitions of Red Robin Franchised Restaurants (Details) (USD $)
0 Months Ended
Mar. 24, 2014
franchisee
Jul. 14, 2014
Apr. 19, 2015
Dec. 28, 2014
Business Acquisition [Line Items]        
Goodwill     $ 83,194,000us-gaap_Goodwill $ 84,115,000us-gaap_Goodwill
Series of business acquisitions, 2014        
Business Acquisition [Line Items]        
Goodwill   23,000,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= rrgb_SeriesofBusinessAcquisitions2014Member
   
March 2014, acquisition of four franchise restaurants        
Business Acquisition [Line Items]        
Number of franchisees 1rrgb_NumberOfFranchiseesCompanyEnteredIntoAgreementToPurchaseAssetsOfRestaurant
/ us-gaap_BusinessAcquisitionAxis
= rrgb_March2014AcquisitionofFourFranchiseRestaurantsMember
     
Purchase price, cash 8,000,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= rrgb_March2014AcquisitionofFourFranchiseRestaurantsMember
     
July 2014, Acquisition of 32 Red Robin franchised restaurant        
Business Acquisition [Line Items]        
Number of restaurants acquired from franchisees   32us-gaap_NumberOfRestaurants
/ us-gaap_BusinessAcquisitionAxis
= rrgb_Summer2014Acquisitionof32RedRobinFranchisedRestaurantsMember
   
Purchase price, cash   $ 39,500,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= rrgb_Summer2014Acquisitionof32RedRobinFranchisedRestaurantsMember
   
United States | March 2014, acquisition of four franchise restaurants        
Business Acquisition [Line Items]        
Number of restaurants acquired from franchisees 4us-gaap_NumberOfRestaurants
/ us-gaap_BusinessAcquisitionAxis
= rrgb_March2014AcquisitionofFourFranchiseRestaurantsMember
/ us-gaap_StatementGeographicalAxis
= country_US
     
United States | July 2014, Acquisition of 32 Red Robin franchised restaurant        
Business Acquisition [Line Items]        
Number of restaurants acquired from franchisees   14us-gaap_NumberOfRestaurants
/ us-gaap_BusinessAcquisitionAxis
= rrgb_Summer2014Acquisitionof32RedRobinFranchisedRestaurantsMember
/ us-gaap_StatementGeographicalAxis
= country_US
   
Canada | July 2014, Acquisition of 32 Red Robin franchised restaurant        
Business Acquisition [Line Items]        
Number of restaurants acquired from franchisees   18us-gaap_NumberOfRestaurants
/ us-gaap_BusinessAcquisitionAxis
= rrgb_Summer2014Acquisitionof32RedRobinFranchisedRestaurantsMember
/ us-gaap_StatementGeographicalAxis
= country_CA