Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Recent Accounting Pronouncements - Additional Information (Details)

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Basis of Presentation and Recent Accounting Pronouncements - Additional Information (Details)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 01, 2017
USD ($)
Oct. 07, 2018
state
province
restaurant
segment
Oct. 01, 2017
USD ($)
Franchisor Disclosure [Line Items]      
Number of operating segments | segment   1  
Number of reportable segments | segment   1  
Selling, General and Administrative Expense | Adjustments      
Franchisor Disclosure [Line Items]      
Local marketing costs | $ $ 3.3   $ 8.7
Other Operating | Adjustments      
Franchisor Disclosure [Line Items]      
Local marketing costs | $ $ (3.3)   $ (8.7)
Company-owned operated restaurants      
Franchisor Disclosure [Line Items]      
Number of restaurants | restaurant   485  
Number of states in which restaurants are located | state   39  
Number of Canadian provinces in which restaurants are located | province   2  
Franchised restaurants      
Franchisor Disclosure [Line Items]      
Number of restaurants | restaurant   89  
Number of states in which restaurants are located | state   16