Business Combinations Pro Forma Information (Details) - Bal Seal [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	$ 19,000		$ 60,400
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual	(7,600)		(21,500)
Business Acquisition, Pro Forma Revenue	213,959	$ 206,143	599,171	$ 594,195
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax	(31,890)	4,753	(14,964)	1,058
Business Acquisition, Pro Forma Net Income (Loss)	(31,890)	137,399	(14,272)	149,084
Pro Forma Nonrecurring Adjustment, Reduction in Deferred Compensation Expense	5,700		17,100
Pro Forma Adjustment, Reduction for Inventory Step-up			2,400
Pro Forma Adjustment, Reduction in Finite-Lived Assets Amortization	1,900		3,800
Pro Forma Nonrecurring Adjustment, Deferred Compensation Expense		5,700		17,100
Pro Forma Nonrecurring Adjustment, Income Tax Expense	$ 1,000	(1,200)	7,600	(5,700)
Pro Forma Nonrecurring Adjustment, Acquisition-Related Expense				8,500
Pro Forma Adjustment, Inventory Step-up				2,400
Pro Forma Adjustment, Finite-Lived Assets Amortization		3,700		7,900
Pro Forma Adjustment, Reduction in Building Expense		$ 1,100		$ 3,200
Pro Forma Nonrecurring Adjustment, Reduction in Acquisition-Related Expense			$ 8,500