Facility Consolidation and Severance Expenses, Net (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 26, 2021	Jun. 27, 2020
Restructuring Cost and Reserve [Line Items]
Accrued Balance		$ 558	$ 343
Expenses to Date	[1]	96	1,270
Cash Payments		426	836
Accrued Balance		228	777
Total Costs Incurred To Date		13,638
Expected Cost Remaining		13,638
Environmental Remediation Costs Recognized [Abstract]
ERC, Refundable Tax Credit		$ 5
ERC, Eligible Percentage of Employees Wages Paid		50.00%
ERC, Qualified Wages Paid to Employees, Maximum		$ 10
ERC, Tax Credit Received		2,100
ERC, Portion Recognized in Cost of Sales		1,500
ERC, Portion Recognized in Selling and Administrative Expenses		600
2015 Corporate Office Consolidation Plan [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance		0	38
Expenses to Date	[1]	0	5
Cash Payments		0	43
Accrued Balance		0	0
Total Costs Incurred To Date		835
Expected Cost Remaining		835
2017 Profit Improvement Plan [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance		104	305
Expenses to Date	[1]	96	246
Cash Payments		144	426
Accrued Balance		56	125
Total Costs Incurred To Date		10,272
Expected Cost Remaining		10,272
2020 COVID-19 Continuity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance		454	0
Expenses to Date	[1]	0	1,019
Cash Payments		282	367
Accrued Balance		172	652
Total Costs Incurred To Date		2,531
Expected Cost Remaining	[2]	2,531
Asset Impairments [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance		0	0
Expenses to Date		0	0
Cash Payments		0	0
Accrued Balance		0	$ 0
Total Costs Incurred To Date		3,323
Expected Cost Remaining		$ 3,323

[1] Costs incurred under these plans are classified as "facility consolidation and severance expenses, net" in the Company's Consolidated Condensed Statements of Operations.

[2] The total additional expected costs under the COVID-19 Continuity Plan cannot be reasonably estimated at this time due to the fluid nature of the COVID-19 outbreak and the unpredictable future impact upon our business.