Annual report pursuant to Section 13 and 15(d)

Leases (Narrative) (Details)

v3.20.4
Leases (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 27, 2020
Dec. 29, 2019
Operating Leased Assets [Line Items]    
Operating Lease Payments, Minimum Lease Payments Excluded, Not Yet Taken Possession of Leases $ 2,100  
Change In Operating Lease Assets and Liabilities Due to Lease Remeasurement $ 5,600 $ 4,300
Lessee, Operating Lease, Term of Contract 20 years  
842 Transition Adjustment $ 170,300  
Deferred lease incentives 200 $ 900
Deferred Rent Credit $ 2,900  
Minimum    
Operating Leased Assets [Line Items]    
Initial lease term 10 years  
Lease terms renewal 10 years  
Maximum    
Operating Leased Assets [Line Items]    
Initial lease term 15 years  
Lease terms renewal 15 years