Business Segment Information - Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Segment Reporting Information [Line Items]
Depreciation and Amortization Expenses	$ 8,338	$ 8,531	$ 25,195	$ 25,129
Capital Expenditures	2,354	2,306	10,658	10,146
Operating segments | Electronic Systems
Segment Reporting Information [Line Items]
Depreciation and Amortization Expenses	3,553	3,575	10,694	10,869
Capital Expenditures	1,216	1,011	4,264	2,950
Operating segments | Structural Systems
Segment Reporting Information [Line Items]
Depreciation and Amortization Expenses	4,670	4,849	14,182	14,058
Capital Expenditures	1,029	1,295	6,272	4,172
Corporate Administration
Segment Reporting Information [Line Items]
Depreciation and Amortization Expenses	115	107	319	202
Capital Expenditures	$ 109	$ 0	$ 122	$ 3,024