CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net revenues:
Products	$ 99,858	$ 124,991	$ 198,576	$ 252,697
Services	41,487		78,840
Total net revenues	141,345	165,476	277,416	324,627
Cost of revenues:
Products	38,902		75,917
Services	15,392		30,668
Amortization of intangible assets	501		1,152
Total cost of revenues	54,795		107,737
Gross profit	86,550		169,679
Operating expenses:
Research and development	23,847		47,454
Marketing and selling	33,903		67,812
General and administrative	16,131		31,728
Amortization of intangible assets	658		1,321
Restructuring costs, net	1,918		2,191
Total operating expenses	76,457		150,506
Operating (loss) income	10,093		19,173
Interest income	122		195
Interest expense	(374)		(709)
Other income, net	5		9
Income (loss) from continuing operations before income taxes	9,846		18,668
Provision for income taxes, net	669		1,226
(Loss) income from continuing operations, net of tax	9,177		17,442
Income from divested operations	0		0
Income from discontinued operations, net of tax	0		0
Net income	9,177		17,442
Income (loss) per share from continuing operations, net of tax – basic	$ 0.24		$ 0.45
Income per share from discontinued operations – basic	$ 0.00		$ 0.00
Net income per common share – basic	$ 0.24		$ 0.45
Income (loss) per share from continuing operations, net of tax – diluted	$ 0.23	$ 0.02	$ 0.45	$ 0.30
Income per share from discontinued operations – diluted	$ 0.00	$ 0.07	$ 0.00	$ 0.20
Net income per common share – diluted	$ 0.23	$ 0.09	$ 0.45	$ 0.50
Weighted-average common shares outstanding - diluted	39,069	38,798	39,061	38,759
Three Months Ended June 30, 2013 [Member]
Operating expenses:
Weighted-average common shares outstanding – basic	39,040
Six Months Ended June 30, 2013 [Member]
Operating expenses:
Weighted-average common shares outstanding – basic			39,009
Scenario, Actual [Member]
Net revenues:
Products		124,991		252,697
Services		40,485		71,930
Total net revenues		165,476		324,627
Cost of revenues:
Products		50,983		96,465
Services		16,329		30,740
Amortization of intangible assets		644		1,294
Total cost of revenues		67,956		128,499
Gross profit		97,520		196,128
Operating expenses:
Research and development		26,261		52,721
Marketing and selling		42,282		84,155
General and administrative		13,351		27,699
Amortization of intangible assets		1,106		2,717
Restructuring costs, net		14,437		14,881
Total operating expenses		97,437		182,173
Operating (loss) income		83		13,955
Interest income		16		145
Interest expense		(407)		(750)
Other income, net		12		32
Income (loss) from continuing operations before income taxes		(296)		13,382
Provision for income taxes, net		(936)		1,736
(Loss) income from continuing operations, net of tax		640		11,646
Income from divested operations		2,773		7,832
Income from discontinued operations, net of tax		2,773		7,832
Net income		$ 3,413		$ 19,478
Income (loss) per share from continuing operations, net of tax – basic		$ 0.02		$ 0.30
Income per share from discontinued operations – basic		$ 0.07		$ 0.20
Net income per common share – basic		$ 0.09		$ 0.50
Weighted-average common shares outstanding – basic		38,778		38,720
Income per share from discontinued operations, net of tax – basic and diluted		$ 0.07		$ 0.20
Net income per common share - basic and diluted		$ 0.09		$ 0.50
Weighted-average common shares outstanding - diluted		38,778		38,759