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Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 30, 2021
Mar. 31, 2020
Revenue    
Total revenue $ 800,629 $ 652,524
Restaurant and other sales    
Revenue    
Total revenue 794,923 647,626
Franchise royalties    
Revenue    
Total revenue 4,973 4,287
Franchise fees    
Revenue    
Total revenue $ 733 $ 611