Business Segment Information - Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Net Revenues	$ 201,412	$ 196,250	$ 589,259	$ 564,761
Segment Operating Income	15,266	8,609	41,812	19,986
Depreciation and Amortization Expenses	8,531	8,478	25,129	24,421
Capital Expenditures	2,306	4,780	10,146	15,795
Operating segments
Segment Reporting Information [Line Items]
Net Revenues	201,412	196,250	589,259	564,761
Segment Operating Income	27,199	19,453	76,401	49,122
Segment reconciling items
Segment Reporting Information [Line Items]
Corporate General and Administrative Expenses	(11,933)	(10,844)	(34,589)	(29,136)
Corporate Administration
Segment Reporting Information [Line Items]
Depreciation and Amortization Expenses	107	59	202	176
Capital Expenditures	0	0	3,024	0
Electronic Systems
Segment Reporting Information [Line Items]
Net Revenues	115,412	110,707	324,391	323,457
Electronic Systems | Operating segments
Segment Reporting Information [Line Items]
Net Revenues	115,412	110,707	324,391	323,457
Segment Operating Income	18,910	12,710	54,685	32,249
Depreciation and Amortization Expenses	3,575	3,567	10,869	10,626
Capital Expenditures	1,011	978	2,950	4,752
Structural Systems
Segment Reporting Information [Line Items]
Net Revenues	86,000	85,543	264,868	241,304
Structural Systems | Operating segments
Segment Reporting Information [Line Items]
Net Revenues	86,000	85,543	264,868	241,304
Segment Operating Income	8,289	6,743	21,716	16,873
Depreciation and Amortization Expenses	4,849	4,852	14,058	13,619
Capital Expenditures	$ 1,295	$ 3,802	$ 4,172	$ 11,043