Leases Supplemental Lease Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 27, 2021	Mar. 28, 2020
Supplemental Lease Information [Abstract]
Operating Lease, Weighted Average Remaining Lease Term		7 years 7 months 6 days	8 years 3 months 7 days
Finance Lease, Weighted Average Remaining Lease Term	[1]	12 years 9 months 14 days	11 years 4 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent		6.92%	6.98%
Finance Lease, Weighted Average Discount Rate, Percent	[1]	9.50%	7.27%
Operating Lease, Payments		$ 1,231	$ 1,228
Interest paid for financing leases	[1]	391	343
Finance Lease, Principal Payments	[1]	$ 781	$ 1,151

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