Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011
Net sales:
Products	$ 169,296	$ 155,064
Products - related party	48	968
Service and components	48,068	40,804
Service and components - related party	143	124
Total net sales	217,555	196,960
Cost of sales:
Products	87,338	83,595
Service and components	32,106	27,461
Total cost of sales	119,444	111,056
Gross profit	98,111	85,904
Operating expenses:
Research and development	22,722	17,940
Selling, general and administrative	41,323	35,782
Restructuring, reorganization, relocation and severance	0	285
Total operating expenses	64,045	54,007
Operating income	34,066	31,897
Other expense:
Interest income	571	492
Interest expense	(1,084)	(1,042)
Other, net	(1,550)	328
Total other expense, net	(2,063)	(222)
Income before income taxes	32,003	31,675
Income tax expense	6,336	9,363
Net income	$ 25,667	$ 22,312
Basic net income per share	$ 0.68	$ 0.58
Diluted net income per share	$ 0.63	$ 0.54
Shares used in per share calculations:
Basic	37,886	38,478
Diluted	41,518	42,101