Discontinued Operations (Statement of Operations) (Details) - Discontinued Operations, Disposed of by Sale - Commercial Divestiture - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 710	$ 15,065	$ 7,622	$ 43,470
Cost of sales	929	12,086	7,247	34,679
Gross profit	(219)	2,979	375	8,791
Selling and administrative expenses	107	3,245	1,244	11,705
Other operating (income) expense	1	0	(51)	0
Discontinued loss, related to the divestiture of the Commercial business	(327)	(266)	(818)	(2,914)
Gain on sale of business	0	(2,660)	0	(2,660)
Income (loss) from discontinued Commercial operations before taxes	$ (327)	$ 2,394	$ (818)	$ (254)

Disposal Group, Including Discontinued Operation, Other Income (Expense)

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Disposal Group, Including Discontinued Operation, Selling and Administrative Expense

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Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Amount of costs of goods sold attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of gross profit attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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