Leases Components of Lease Expense (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020
Components of Lease Expense [Abstract]
Operating lease cost		$ 1,074	$ 1,198	$ 3,624	$ 3,644
Finance Lease, Amortization of lease assets	[1]	633	790	1,898	2,370
Finance Lease, Interest on lease liabilities	[1]	366	446	1,136	1,067
Total Finance Lease Cost	[1]	$ 999	$ 1,236	$ 3,034	$ 3,437

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