Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Net Sales	$ 571,352	$ 448,405	$ 1,084,196	$ 860,732
Cost of sales	305,968	241,033	583,826	467,882
Gross profit	265,384	207,372	500,370	392,850
Selling, general and administrative expenses	72,621	66,872	144,010	125,763
Engineering, research and development expenses	41,972	32,572	79,720	62,204
Amortization of intangible assets	11,902	13,216	23,773	29,427
Operating income	138,889	94,712	252,867	175,456
Interest expense	10,697	13,005	22,349	23,564
Interest income	(54)	(213)	(125)	(534)
Other expense (income), net	23,560	(477)	27,890	401
Income before income tax expense	104,686	82,397	202,753	152,025
Income tax expense	15,916	14,361	29,307	22,983
Net income	$ 88,770	$ 68,036	$ 173,446	$ 129,042
Basic earnings per common share	$ 0.66	$ 0.51	$ 1.28	$ 0.96
Diluted earnings per common share	$ 0.65	$ 0.50	$ 1.27	$ 0.95
Weighted shares outstanding:
Basic	135,498	134,700	135,283	134,722
Diluted	136,533	136,007	136,518	136,188