Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Net sales	$ 317,377	$ 267,024
Cost of sales	177,781	152,318
Gross profit	139,596	114,706
Selling, general and administrative expenses	50,492	47,956
Engineering, research and development expenses	27,239	25,902
Amortization of intangible assets	10,945	11,289
Operating income	50,920	29,559
Interest expense	8,473	9,218
Interest income	(80)	(69)
Other expense (income), net	902	(675)
Income before income tax expense	41,625	21,085
Income tax expense	9,111	4,873
Net income	$ 32,514	$ 16,212
Basic net income per common share	$ 0.23	$ 0.12
Diluted net income per common share	$ 0.23	$ 0.11
Weighted shares outstanding:
Basic	141,501	140,780
Diluted	143,315	141,371