Annual report pursuant to Section 13 and 15(d)

Acquisitions of Red Robin Franchised Restaurants (Details)

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Acquisitions of Red Robin Franchised Restaurants (Details)
$ in Millions
Aug. 31, 2015
USD ($)
restaurant
Jul. 14, 2014
USD ($)
restaurant
Mar. 24, 2014
USD ($)
restaurant
franchisee
August 2015, acquisition of franchise restaurant      
Business Acquisition [Line Items]      
Number of restaurants acquired from franchises 1    
Purchase price, cash | $ $ 2.5    
March 2014, acquisition of four franchise restaurants      
Business Acquisition [Line Items]      
Number of restaurants acquired from franchises     4
Purchase price, cash | $     $ 8.0
Number of franchisees | franchisee     1
July 2014, acquisition of 32 Red Robin franchise restaurants      
Business Acquisition [Line Items]      
Number of restaurants acquired from franchises   32  
Purchase price, cash | $   $ 39.5  
United States | July 2014, acquisition of 32 Red Robin franchise restaurants      
Business Acquisition [Line Items]      
Number of restaurants acquired from franchises   14  
Canada | July 2014, acquisition of 32 Red Robin franchise restaurants      
Business Acquisition [Line Items]      
Number of restaurants acquired from franchises   18