Annual report pursuant to Section 13 and 15(d)

Borrowings Borrowings - Additional Information (Details)

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Borrowings Borrowings - Additional Information (Details)
 12 Months Ended
Jan. 10, 2020
USD ($)
Jun. 30, 2016
USD ($)
Dec. 29, 2019
USD ($)
Dec. 30, 2018
USD ($)
Additional disclosure        
Short-term debt     $ 0 $ 0
Credit facility        
Additional disclosure        
Current borrowing capacity   $ 20,000,000    
Additional borrowing capacity subject to lender participation   $ 100,000,000    
Credit facility | Revolving credit facility        
Additional disclosure        
Amounts outstanding     206,000,000 192,500,000
Credit facility | Revolving credit facility | Federal Funds Rate        
Additional disclosure        
Interest rate margin (as a percent)   0.50%    
Credit facility | Revolving credit facility | LIBOR        
Additional disclosure        
Interest rate margin (as a percent)   1.00%    
Credit facility | Revolving credit facility | Canadian Dealer Offered Rate (CDOR)        
Additional disclosure        
Interest rate margin (as a percent)   1.00%    
Credit facility | Letter of credit        
Additional disclosure        
Amounts outstanding     $ 7,500,000 7,800,000
Unamortized Debt Issuance Expense       $ 1,700,000
Credit facility | Swingline loans        
Additional disclosure        
Current borrowing capacity   $ 15,000,000    
Revolving credit facility | Credit facility        
Additional disclosure        
Lease adjusted leverage ration during fiscal year 2020     4.72  
Revolving credit facility | Credit facility | Line of credit        
Additional disclosure        
Current borrowing capacity   400,000,000    
Letter of credit | Credit facility | Line of credit        
Additional disclosure        
Current borrowing capacity   $ 25,000,000    
Unamortized Debt Issuance Expense     $ 1,000,000  
Subsequent event        
Additional disclosure        
Lease adjusted leverage ration during fiscal year 2020 5.0      
Lease adjusted leverage ratio during fiscal year 2021 4.75      
Lease adjusted leverage ration during fiscal year 2022 and thereafter 4.50      
Subsequent event | New credit facility        
Additional disclosure        
Additional borrowing capacity subject to lender participation $ 100,000,000      
Proceeds from long-term lines of credit $ 186,600,000      
Line of credit facility, periodic payment, principal, percentage 7.00%      
Subsequent event | New credit facility | Revolving credit facility | Federal Funds Rate        
Additional disclosure        
Interest rate margin (as a percent) 0.50%      
Subsequent event | New credit facility | Revolving credit facility | LIBOR        
Additional disclosure        
Interest rate margin (as a percent) 1.00%      
Subsequent event | New credit facility | Revolving credit facility | Canadian Dealer Offered Rate (CDOR)        
Additional disclosure        
Interest rate margin (as a percent) 1.00%      
Subsequent event | New credit facility | Line of credit        
Additional disclosure        
Current borrowing capacity $ 300,000,000      
Maximum sale leaseback transactions 50,000,000      
Subsequent event | New credit facility | Letter of credit        
Additional disclosure        
Current borrowing capacity 25,000,000      
Subsequent event | New credit facility | Swingline loans        
Additional disclosure        
Current borrowing capacity 15,000,000      
Subsequent event | Revolving credit facility | New credit facility | Line of credit        
Additional disclosure        
Current borrowing capacity 161,500,000      
Subsequent event | Term loan | New credit facility | Line of credit        
Additional disclosure        
Current borrowing capacity 138,500,000      
Subsequent event | Foreign line of credit | New credit facility | Revolving credit facility        
Additional disclosure        
Current borrowing capacity $ 20,000,000