Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Robert E Shaw [Member]
Related Party Transaction [Line Items]
Ownership of Common Stock, Percentage	7.60%		7.60%
Voting Interest of Common Stock, Percentage	3.20%		3.20%
Related Party Transaction, Purchases from Related Party	$ 925	$ 992	$ 1,902	$ 2,269
Related Party Transaction, Purchases from Related Party, Percentage	1.20%	2.00%	1.30%	2.10%
Robert P Rothman [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ 73	$ 72	$ 146	$ 143