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Basis of Presentation (Details)
Sep. 25, 2018
restaurant
item
Sep. 26, 2017
restaurant
item
Description of Business    
Number of states in which restaurants operate | item 49 49
Number of countries in which restaurants operate | item 8 6
Company    
Description of Business    
Number of restaurants 479 455
Company | Wholly-owned    
Description of Business    
Number of restaurants 460 437
Company | Majority-owned    
Description of Business    
Number of restaurants 19 18
Franchise    
Description of Business    
Number of restaurants 91 85
Franchise | Domestic    
Description of Business    
Number of restaurants 70 70
Franchise | International    
Description of Business    
Number of restaurants 21 15
Franchise | Unconsolidated    
Description of Business    
Number of restaurants 24 24
Franchise | Unconsolidated | Minimum    
Description of Business    
Ownership percentage by entity 5.00% 5.00%
Franchise | Unconsolidated | Maximum    
Description of Business    
Ownership percentage by entity 10.00% 10.00%
Non-Texas Roadhouse restaurants | Unconsolidated    
Description of Business    
Number of restaurants 4 4
Ownership percentage by entity 40.00% 40.00%