Leases Contractual Obligations for Operating and Financing Liabilities (Details) - USD ($) $ in Thousands		Sep. 26, 2020	Dec. 28, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year		$ 1,246
Lessee, Operating Lease, Liability, to be Paid, Year Two		4,701
Lessee, Operating Lease, Liability, to be Paid, Year Three		4,188
Lessee, Operating Lease, Liability, to be Paid, Year Four		3,247
Lessee, Operating Lease, Liability, to be Paid, Year Five		2,940
Lessee, Operating Lease, Liability, to be Paid, after Year Five		14,529
Lessee, Operating Lease, Liability, to be Paid		30,851
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		7,373
Operating Lease, Liability		23,478	$ 25,295
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, to be Paid, Remainder of Fiscal Year		1,405
Finance Lease, Liability, to be Paid, Year Two		5,240
Finance Lease, Liability, to be Paid, Year Three		2,887
Finance Lease, Liability, to be Paid, Year Four		3,409
Finance Lease, Liability, to be Paid, Year Five		1,045
Finance Lease, Liability, to be Paid, after Year Five		16,039
Finance Lease, Liability, Payment, Due		30,025
Finance Lease, Liability, Undiscounted Excess Amount		11,099
Finance Lease, Liability	[1]	$ 18,926	$ 19,483

[1] Includes leases classified as failed sale-leaseback transactions.