CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net revenues:
Products	$ 98,718	$ 127,706
Services	37,353
Total net revenues	136,071	159,151
Cost of revenues:
Products	37,015
Services	15,276
Amortization of intangible assets	651
Total cost of revenues	52,942
Gross profit	83,129
Operating expenses:
Research and development	23,607
Marketing and selling	33,909
General and administrative	15,597
Amortization of intangible assets	663
Restructuring costs, net	273
Total operating expenses	74,049
Operating loss	9,080
Interest income	73
Interest expense	(335)
Other income	4
(Loss) income from continuing operations before income taxes	8,822
Provision for income taxes, net	557
Income (Loss) from Continuing Operations Attributable to Parent	8,265
Income from divested operations	0
Loss from discontinued operations	0
Net income	8,265
Income per share from continuing operations, net of tax – basic	$ 0.21
Income per share from discontinued operations – basic	$ 0.00
Net income per common share – basic	$ 0.21
Income per share from continuing operations, net of tax – diluted	$ 0.21	$ 0.28
Income per share from discontinued operations – diluted	$ 0.00	$ 0.13
Net income per common share – diluted	$ 0.21	$ 0.41
Weighted-average common shares outstanding – diluted	39,034	38,721
Three Months Ended March 31, 2013 [Member]
Operating expenses:
Weighted-average common shares outstanding – basic	38,977
Scenario, Actual [Member]
Net revenues:
Products		127,706
Services		31,445
Total net revenues		159,151
Cost of revenues:
Products		45,482
Services		14,411
Amortization of intangible assets		650
Total cost of revenues		60,543
Gross profit		98,608
Operating expenses:
Research and development		26,460
Marketing and selling		41,873
General and administrative		14,348
Amortization of intangible assets		1,611
Restructuring costs, net		444
Total operating expenses		84,736
Operating loss		13,872
Interest income		129
Interest expense		(343)
Other income		20
(Loss) income from continuing operations before income taxes		13,678
Provision for income taxes, net		2,672
Income (Loss) from Continuing Operations Attributable to Parent		11,006
Income from divested operations		5,059
Loss from discontinued operations		5,059
Net income		$ 16,065
Income per share from continuing operations, net of tax – basic		$ 0.29
Income per share from discontinued operations – basic		$ 0.13
Net income per common share – basic		$ 0.42
Income per share from continuing operations, net of tax – diluted		$ 0.28
Income per share from discontinued operations – diluted		$ 0.13
Net income per common share – diluted		$ 0.41
Weighted-average common shares outstanding – basic		38,662
Weighted-average common shares outstanding – diluted		38,721