Facility Consolidation and Severance Expenses, Net (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 27, 2020	Jun. 29, 2019
Restructuring Cost and Reserve [Line Items]
Accrued Balance		$ 343	$ 944
Expenses to Date	[1]	1,270	3,816
Cash Payments		836	4,313
Accrued Balance		777	447
Total Costs Incurred To Date		10,899
Expected Cost Remaining		10,899
2015 Corporate Office Consolidation Plan [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance		38	98
Expenses to Date	[1]	5	8
Cash Payments		43	42
Accrued Balance		0	64
Total Costs Incurred To Date		834
Expected Cost Remaining		834
2017 Profit Improvement Plan [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance		305	846
Expenses to Date	[1]	246	3,808
Cash Payments		426	4,271
Accrued Balance		125	383
Total Costs Incurred To Date		9,046
Expected Cost Remaining		9,046
2020 COVID-19 Continuity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance		0
Expenses to Date	[1]	1,019
Cash Payments		367
Accrued Balance		652
Total Costs Incurred To Date		1,019
Expected Cost Remaining	[2]	1,019
Asset Impairments [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance		0	0
Expenses to Date		0	3
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.