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Acquisitions (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Apr. 04, 2021
USD ($)
numberOfMarkets
Oct. 03, 2021
USD ($)
number_of_restaurants
Sep. 27, 2020
USD ($)
number_of_restaurants
Jan. 03, 2021
USD ($)
Nov. 18, 2020
numberOfMarkets
Jul. 31, 2020
numberOfMarkets
number_of_restaurants
Business Acquisition            
Number of restaurants | number_of_restaurants   6,891        
Number of markets to be sold by NPC           8
NPC Consortium Bid: Number of Markets to be Purchased by Franchisees         7  
NPC Consortium Bid: Number of Markets to be Purchased by Company         1  
NPC Consortium bid deposit | $       $ 43,240    
NPC Consortium bid payable | $       $ 38,361    
NPC Asset Purchase Agreement: Number of Markets to be Purchased by FRG 4          
NPC Asset Purchase Agreement: Number of Markets to be Purchased by Franchisees 4          
Acquisitions | $ $ 4,879 $ 4,879 $ 0      
NPC Franchised Restaurants            
Business Acquisition            
Number of restaurants | number_of_restaurants           393
Acquisitions            
Business Acquisition            
Restaurants acquired from franchisees | number_of_restaurants   0 0