Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Narrative) (Details)

v3.20.1
Subsequent Events (Narrative) (Details)
Feb. 11, 2020
State
Restaurant
Dec. 29, 2019
State
Restaurant
Dec. 30, 2018
Restaurant
Dec. 31, 2017
Restaurant
Subsequent Event [Line Items]        
Number of Restaurants   100 100 91
Number of States in which Entity Operates | State   19    
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Number of new restaurants 1      
Number of Restaurants 101      
Number of States in which Entity Operates | State 19