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Summary of Significant Accounting Polices - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 27, 2018
Mar. 28, 2017
Dec. 26, 2017
Apr. 30, 2015
Nov. 25, 2014
Significant Accounting Policies [Line Items]          
Cash $ 9,000,000   $ 7,000,000    
Restricted cash 200,000   200,000    
U.S. Treasury instruments $ 15,000,000   $ 21,000,000    
Common units held 5,578,616        
Anti-dilutive shares 33,996 902      
ASU No. 2016-02 [Member]          
Significant Accounting Policies [Line Items]          
Operating lease obligations $ 253,200,000        
ASU No. 2014-09 [Member]          
Significant Accounting Policies [Line Items]          
Reduction to retained earnings as cumulative effect of adoption of accounting standard update 400,000        
Decrease in revenue as a result of adoption of accounting standard update $ 45,000        
2014 Omnibus Incentive Plan [Member]          
Significant Accounting Policies [Line Items]          
Options granted 1,325,559 1,202,846      
Options and Restricted Stock Units (RSUs) [Member] | 2014 Omnibus Incentive Plan [Member]          
Significant Accounting Policies [Line Items]          
Number of shares authorized 2,525,275        
Habit Restaurants, LLC [Member]          
Significant Accounting Policies [Line Items]          
Non-controlling interests ownership percentage 21.40% 22.20%   47.10% 65.50%
Common units held 20,488,849