Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Net Sales	$ 394,147	$ 398,597	$ 1,164,068	$ 1,148,855
Cost of sales	223,797	216,881	650,051	608,764
Gross profit	170,350	181,716	514,017	540,091
Selling, general and administrative expenses	71,232	62,358	217,636	185,827
Engineering, research and development expenses	31,173	29,964	90,788	87,781
Amortization of intangible assets	15,152	21,419	50,400	45,102
Operating income	52,793	67,975	155,193	221,381
Interest expense	11,388	7,987	33,587	24,442
Interest income	(1,172)	(309)	(4,020)	(2,613)
Other expense (income), net	934	810	(121,329)	4,826
Income before income tax expense	41,643	59,487	246,955	194,726
Income tax expense	876	11,427	49,533	34,755
Net income	$ 40,767	$ 48,060	$ 197,422	$ 159,971
Basic net income per common share	$ 0.30	$ 0.34	$ 1.46	$ 1.13
Diluted net income per common share	$ 0.30	$ 0.34	$ 1.45	$ 1.12
Weighted shares outstanding:
Basic	135,092	141,556	135,256	141,613
Diluted	136,530	143,033	136,601	143,308