Leases Other Supplemental Information Related to Leases (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 26, 2020		Dec. 28, 2019		Dec. 29, 2018
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term		7 years 8 months 23 days		8 years 5 months 1 day
Finance Lease, Weighted Average Remaining Lease Term	[1]	12 years 6 months 25 days		12 years 10 days
Operating Lease, Weighted Average Discount Rate, Percent		6.91%		6.98%
Finance Lease, Weighted Average Discount Rate, Percent	[1]	9.42%		6.72%
Operating Lease, Payments		$ 4,874		$ 3,518
Finance Lease, Interest Payment on Liability		1,702	[1]	1,378	[1]	$ 791
Finance Lease, Principal Payments	[1]	$ 4,756		$ 4,166

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