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Leases Schedule of Maturities of Long-term Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 26, 2020	Dec. 29, 2018
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		$ 6,114
Long-term Debt, Maturities, Repayments of Principal in Year Two		3,006
Long-term Debt, Maturities, Repayments of Principal in Year Three		3,603
Long-term Debt, Maturities, Repayments of Principal in Year Four		6,903
Long-term Debt, Maturities, Repayments of Principal in Year Five		30,897
Long-term Debt, Maturities, Repayments of Principal after Year Five		29,564
Total commitments		80,087
Total	$ 88,351	$ 78,157
Finance Lease Obligations Under 840 [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months			$ 4,590
Long-term Debt, Maturities, Repayments of Principal in Year Two			4,205
Long-term Debt, Maturities, Repayments of Principal in Year Three			3,333
Long-term Debt, Maturities, Repayments of Principal in Year Four			989
Long-term Debt, Maturities, Repayments of Principal in Year Five			244
Long-term Debt, Maturities, Repayments of Principal after Year Five			0
Total commitments			13,361
Capital Leases, Future Minimum Payments, Interest Included in Payments			(1,265)
Total			12,096
Operating Lease Obligations Under 840 [Member]
Debt Instrument [Line Items]
Operating Leases, Rent Expense	$ 4,453
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months			3,002
Long-term Debt, Maturities, Repayments of Principal in Year Two			2,533
Long-term Debt, Maturities, Repayments of Principal in Year Three			2,121
Long-term Debt, Maturities, Repayments of Principal in Year Four			1,667
Long-term Debt, Maturities, Repayments of Principal in Year Five			882
Long-term Debt, Maturities, Repayments of Principal after Year Five			3,155
Total commitments			13,360
Capital Leases, Future Minimum Payments, Interest Included in Payments			0
Total			$ 13,360