Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Net sales	$ 165,804	$ 165,070
Cost of sales	94,452	97,942
Gross profit	71,352	67,128
Selling, general and administrative expenses	34,787	32,421
Engineering, research and development expenses	15,690	12,173
Amortization of intangible assets	2,336	2,287
Operating income	18,539	20,247
Other income, net	(16)	(1,348)
Income before income taxes	18,555	21,595
Income tax expense	4,243	5,198
Net income	$ 14,312	$ 16,397
Basic net income per common share	$ 0.10	$ 0.12
Diluted net income per common share	$ 0.10	$ 0.12
Weighted shares outstanding:
Basic	138,927	139,025
Diluted	139,706	139,831