Facility Consolidation and Severance Expenses, Net (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Jun. 29, 2019	Sep. 28, 2019	Sep. 29, 2018
Restructuring Cost and Reserve [Line Items]
Accrued Balance			$ 944	$ 505
Expenses to Date	[1]		4,859	936
Cash Payments			5,390	979
Accrued Balance			413	462
Total Costs Incurred To Date			9,469
Expected Cost Remaining			9,869
2015 Corporate Office Consolidation Plan [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance			98	171
Expenses to Date	[1]		11	6
Cash Payments			63	61
Accrued Balance			46	116
Total Costs Incurred To Date			827
Expected Cost Remaining			831
2017 Profit Improvement Plan [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance			846	334
Expenses to Date	[1]		4,848	930
Cash Payments			5,327	918
Accrued Balance			367	346
Total Costs Incurred To Date			8,642
Expected Cost Remaining			9,038
Other Restructuring Costs		$ 1,052
Asset Impairments [Member]
Restructuring Cost and Reserve [Line Items]
Accrued Balance			0	0
Expenses to Date			3	349
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.