Business Segment Information - Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Segment Reporting Information [Line Items]
Net Revenues	$ 163,481	$ 157,151
Segment Operating Income	9,123	10,610
Depreciation and Amortization Expenses	7,768	6,922
Capital Expenditures	5,068	2,613
Operating Segments
Segment Reporting Information [Line Items]
Segment Operating Income	14,298	17,619
Segment Reconciling Items
Segment Reporting Information [Line Items]
Corporate General and Administrative Expenses	(5,175)	(7,009)
Corporate Administration
Segment Reporting Information [Line Items]
Depreciation and Amortization Expenses	59	59
Capital Expenditures	0	0
Electronic Systems
Segment Reporting Information [Line Items]
Net Revenues	97,466	99,104
Electronic Systems | Operating Segments
Segment Reporting Information [Line Items]
Segment Operating Income	9,411	12,491
Depreciation and Amortization Expenses	3,506	3,423
Capital Expenditures	1,696	624
Structural Systems
Segment Reporting Information [Line Items]
Net Revenues	66,015	58,047
Structural Systems | Operating Segments
Segment Reporting Information [Line Items]
Segment Operating Income	4,887	5,128
Depreciation and Amortization Expenses	4,203	3,440
Capital Expenditures	$ 3,372	$ 1,989