Leases Supplemental Lease Information (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 25, 2021	Sep. 26, 2020
Supplemental Lease Information [Abstract]
Operating Lease, Weighted Average Remaining Lease Term		7 years 7 months 28 days	8 years 18 days
Finance Lease, Weighted Average Remaining Lease Term	[1]	13 years 4 months 17 days	11 years 8 months 15 days
Operating Lease, Weighted Average Discount Rate, Percent		6.79%	6.83%
Finance Lease, Weighted Average Discount Rate, Percent	[1]	9.63%	9.08%
Operating Lease, Payments		$ 3,610	$ 3,706
Interest paid for financing leases	[1]	1,136	1,067
Finance Lease, Principal Payments	[1]	$ 2,290	$ 2,767

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