Annual report pursuant to Section 13 and 15(d)

Description of Business and Summary of Significant Accounting Policies (Details)

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Description of Business and Summary of Significant Accounting Policies (Details)
12 Months Ended
Dec. 31, 2017
state
province
restaurant
segment
Description of business and summary of significant accounting policies  
Number of operating segments | segment 1
Number of reportable segments | segment 1
Company-owned operated restaurants  
Description of business and summary of significant accounting policies  
Number of restaurants | restaurant 480
Number of states in which restaurants are located | state 39
Number of Canadian provinces in which restaurants are located | province 2
Franchised restaurants  
Description of business and summary of significant accounting policies  
Number of restaurants | restaurant 86
Number of states in which restaurants are located | state 15