Quarterly report pursuant to Section 13 or 15(d)

Impairment and Restaurant Closures (Details)

v2.4.1.9
Impairment and Restaurant Closures (Details) (USD $)
4 Months Ended
Apr. 19, 2015
restaurant
Apr. 20, 2014
restaurant
Restructuring and Related Activities [Abstract]    
Number of restaurants closed 1rrgb_NumberOfRestaurantsClosed 2rrgb_NumberOfRestaurantsClosed
Impairment recorded $ 0us-gaap_AssetImpairmentCharges $ 0us-gaap_AssetImpairmentCharges