Leases Components of Lease Expense (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Components of Lease Expense [Abstract]
Operating lease cost		$ 1,238	$ 1,307	$ 2,706	$ 2,599
Finance Lease, Amortization of lease assets	[1]	702	790	1,404	1,580
Finance Lease, Interest on lease liabilities	[1]	379	348	770	691
Total Finance Lease Cost	[1]	$ 1,081	$ 1,138	$ 2,174	$ 2,271

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