Business Segment Information - Schedule of Reportable Segment (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Segment Reporting Information [Line Items]
Net Revenues	$ 212,558,000	$ 201,412,000	$ 608,932,000	$ 589,259,000
Cost of Sales	156,083,000	148,736,000	447,122,000	438,401,000
Selling, General and Administrative Expenses	36,267,000	35,486,000	106,820,000	104,498,000
Restructuring Charges	583,000	1,924,000	1,617,000	4,548,000
Segment Operating Income	33,025,000	27,199,000	92,056,000	76,401,000
Operating (Loss) Income	(80,050,000)	15,266,000	(46,302,000)	41,812,000
Interest Expense	(2,927,000)	(3,829,000)	(9,198,000)	(11,687,000)
Other Income	0	0	1,746,000	0
(Loss) Income Before Taxes	(82,977,000)	11,437,000	(53,754,000)	30,125,000
Corporate Administration
Segment Reporting Information [Line Items]
Corporate general and administrative expenses	(113,075,000)	(11,933,000)	(138,358,000)	(34,589,000)
Electronic Systems | Operating segments
Segment Reporting Information [Line Items]
Net Revenues	123,082,000	115,412,000	343,056,000	324,391,000
Cost of Sales	90,477,000	84,468,000	248,972,000	235,827,000
Selling, General and Administrative Expenses	11,436,000	11,943,000	33,630,000	33,317,000
Restructuring Charges	71,000	91,000	242,000	562,000
Segment Operating Income	21,098,000	18,910,000	60,212,000	54,685,000
Structural Systems
Segment Reporting Information [Line Items]
Restructuring Charges		0		900,000
Structural Systems | Operating segments
Segment Reporting Information [Line Items]
Net Revenues	89,476,000	86,000,000	265,876,000	264,868,000
Cost of Sales	65,606,000	64,268,000	198,150,000	201,719,000
Selling, General and Administrative Expenses	11,431,000	11,610,000	34,507,000	36,590,000
Restructuring Charges	512,000	1,833,000	1,375,000	4,843,000
Segment Operating Income	$ 11,927,000	$ 8,289,000	$ 31,844,000	$ 21,716,000