Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Net Sales	$ 480,987	$ 394,147	$ 1,341,719	$ 1,164,068
Cost of sales	254,987	223,797	722,869	650,051
Gross profit	226,000	170,350	618,850	514,017
Selling, general and administrative expenses	71,195	71,232	196,958	217,636
Engineering, research and development expenses	36,295	31,173	98,499	90,788
Amortization of intangible assets	11,749	15,152	41,176	50,400
Operating income	106,761	52,793	282,217	155,193
Interest expense	12,781	11,388	36,345	33,587
Interest income	(130)	(1,172)	(664)	(4,020)
Other (income) expense, net	(1,752)	934	(1,351)	(121,329)
Income before income tax expense	95,862	41,643	247,887	246,955
Income tax expense	16,559	876	39,542	49,533
Net income	$ 79,303	$ 40,767	$ 208,345	$ 197,422
Basic earnings per common share	$ 0.59	$ 0.30	$ 1.55	$ 1.46
Diluted earnings per common share	$ 0.58	$ 0.30	$ 1.53	$ 1.45
Weighted shares outstanding:
Basic	134,957	135,092	134,801	135,256
Diluted	136,252	136,530	136,209	136,601