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Related Party Transactions (Details)
$ in Millions
12 Months Ended
Dec. 29, 2015
USD ($)
restaurant
Dec. 30, 2014
USD ($)
restaurant
Dec. 31, 2013
USD ($)
restaurant
Nov. 25, 2014
Franchise restaurant jointly owned        
Related Party Transactions        
Ownership percentage by entity       5.00%
Officers, directors and shareholders        
Related Party Transactions        
Number of franchise restaurants owned, in whole or part, by certain of entity's officers, directors or 5% shareholders 10 14 15  
Ownership percentage by related party 5.00% 5.00% 5.00%  
Fees received from franchise and license restaurants | $ $ 1.8 $ 2.5 $ 2.4  
Number of restaurants for which the entity is contingently liable on the lease 2