Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net revenues
Products	$ 167,145	$ 199,376	$ 573,329	$ 569,377
Services	27,363	21,947	77,517	64,759
Total net revenues	194,508	221,323	650,846	634,136
Cost of revenues
Cost of products	90,785	110,418	307,087	315,674
Cost of services	16,045	12,402	44,732	37,145
Total cost of revenues	106,830	122,820	351,819	352,819
Gross profit	87,678	98,503	299,027	281,317
Research and development	14,331	15,070	46,809	46,899
Selling, general and administrative	31,984	28,247	96,542	86,961
Amortization of intangible assets	251	250	751	1,033
Gain on sale of asset	0	0	0	(682)
Income from operations	41,112	54,936	154,925	147,106
Interest income	284	67	869	698
Interest expense	12	32	17	84
Income from continuing operations before income taxes	41,384	54,971	155,777	147,720
Provision for income taxes	11,011	18,370	48,760	48,977
Income from continuing operations	30,373	36,601	107,017	98,743
Income from discontinued operations, net of taxes	0	2,035	0	7,895
Net income	$ 30,373	$ 38,636	$ 107,017	$ 106,638
Basic income per share:
Continuing operations	$ 0.58	$ 0.73	$ 2.06	$ 1.98
Discontinued operations	$ 0	$ 0.04	$ 0	$ 0.16
Net income	$ 0.58	$ 0.77	$ 2.06	$ 2.13
Diluted income per share:
Continuing operations	$ 0.57	$ 0.72	$ 2.03	$ 1.94
Discontinued operations	$ 0	$ 0.04	$ 0	$ 0.16
Net income	$ 0.57	$ 0.76	$ 2.03	$ 2.10
Cash dividends per common share	$ 0.15	$ 0	$ 0.45	$ 0
Weighted average common shares outstanding:
Basic	52,456	50,226	52,070	49,965
Diluted	52,992	50,994	52,761	50,821