Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Income Tax Disclosure [Abstract]
Tax impact	$ 6,214	$ (228)	$ 9,979	$ 2,735
Effective tax rate	19.60%	(1.90%)	26.70%	9.40%
Possible reduction in liabilities for uncertain tax positions	$ 500		$ 500