Business Segment Information - Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Segment Reporting Information [Line Items]
Net Revenues	$ 186,590	$ 163,227	$ 524,269	$ 480,570
Segment Operating Income	13,217	13,363	30,094	37,065
Depreciation and Amortization Expenses	7,669	7,204	23,335	21,112
Capital Expenditures	4,367	3,562	14,864	10,019
Operating Segments
Segment Reporting Information [Line Items]
Segment Operating Income	20,568	19,776	49,741	57,362
Segment Reconciling Items
Segment Reporting Information [Line Items]
Corporate General and Administrative Expenses	(7,351)	(6,413)	(19,647)	(20,297)
Corporate Administration
Segment Reporting Information [Line Items]
Depreciation and Amortization Expenses	59	58	176	176
Capital Expenditures	0	0	0	0
Electronic Systems
Segment Reporting Information [Line Items]
Net Revenues	113,404	104,721	320,602	306,622
Electronic Systems | Operating Segments
Segment Reporting Information [Line Items]
Segment Operating Income	13,881	15,319	36,902	42,185
Depreciation and Amortization Expenses	3,510	3,547	10,500	10,396
Capital Expenditures	3,192	1,964	7,831	3,865
Structural Systems
Segment Reporting Information [Line Items]
Net Revenues	73,186	58,506	203,667	173,948
Structural Systems | Operating Segments
Segment Reporting Information [Line Items]
Segment Operating Income	6,687	4,457	12,839	15,177
Depreciation and Amortization Expenses	4,100	3,599	12,659	10,540
Capital Expenditures	$ 1,175	$ 1,598	$ 7,033	$ 6,154