Discontinued Operations (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 24, 2022 USD ($) installment	Dec. 25, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accrual for environmental loss contingencies	$ 1,904	$ 1,913
Discontinued Operations, Disposed of by Sale | Commercial Divestiture
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net proceeds, including escrowed funds	20,500
Contract liabilities	3,127
Gain on discontinued operation	$ 2,700
Discontinued operations, noncompete, term	5 years
Escrow deposit	$ 2,100
Escrow deposits, number of installments | installment	2
Escrow deposit, initial amount paid, percentage	50.00%
Escrow deposit, initial amount paid, period	90 days
Escrow deposit, remaining amount paid, period	18 months
Escrow deposit, current	$ 1,025
Payments for deposits with other institutions	$ 2,100