RESTATEMENT OF CONSOLIDATED FINANCIAL STATEMENTS Adjustments to Condensed Consolidated Statement of Operations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Products	$ 98,718	$ 127,706
Services	37,353
Total net revenues	136,071	159,151
Products	37,015
Services	15,276
Amortization of intangible assets	651
Total cost of revenues	52,942
Gross profit	83,129
Research and development	23,607
Marketing and selling	33,909
General and administrative	15,597
Amortization of Intangible Assets	663
Restructuring Charges	273
Total operating expenses	74,049
Operating (loss) income	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
(Loss) income from continuing operations, net of tax	8,265
Income from divested operations	0
Net (loss) income	8,265
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.21
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	$ 0.00
Earnings Per Share, Basic	$ 0.21
(Loss) 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 (loss) income per common share – diluted	$ 0.21	$ 0.41
Weighted-average common shares outstanding – diluted	39,034	38,721
Scenario, Previously Reported [Member]
Products		119,938
Services		32,201
Total net revenues		152,139
Products		61,208
Services		12,717
Amortization of intangible assets		650
Total cost of revenues		74,575
Gross profit		77,564
Research and development		27,482
Marketing and selling		45,927
General and administrative		14,638
Amortization of Intangible Assets		1,611
Restructuring Charges		168
Total operating expenses		89,826
Operating (loss) income		(12,262)
Interest income		129
Interest expense		343
Other income		20
(Loss) income from continuing operations before income taxes		(12,456)
Provision for income taxes, net		521
(Loss) income from continuing operations, net of tax		(12,977)
Income from divested operations		0
Net (loss) income		(12,977)
Income (Loss) from Continuing Operations, Per Basic Share		$ (0.34)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share		$ 0.00
Earnings Per Share, Basic		$ (0.34)
(Loss) income per share from continuing operations, net of tax – diluted		$ (0.34)
Income per share from discontinued operations – diluted		$ 0.00
Net (loss) income per common share – diluted		$ (0.34)
Weighted-average common shares outstanding – basic		38,662
Weighted-average common shares outstanding – diluted		38,662
Restatement Adjustment [Member]
Products		30,564
Services		(756)
Total net revenues		29,808
Products		0
Services		0
Amortization of intangible assets		0
Total cost of revenues		0
Gross profit		29,808
Research and development		0
Marketing and selling		0
General and administrative		0
Amortization of Intangible Assets		0
Restructuring Charges		0
Total operating expenses		0
Operating (loss) income		29,808
Interest income		0
Interest expense		0
Other income		0
(Loss) income from continuing operations before income taxes		29,808
Provision for income taxes, net		0
(Loss) income from continuing operations, net of tax		29,808
Income from divested operations		0
Net (loss) income		29,808
Other Adjustment [Member]
Products		0
Services		0
Total net revenues		0
Products		(491)
Services		1,694
Amortization of intangible assets		0
Total cost of revenues		1,203
Gross profit		(1,203)
Research and development		(245)
Marketing and selling		(2,898)
General and administrative		279
Amortization of Intangible Assets		0
Restructuring Charges		276
Total operating expenses		(2,588)
Operating (loss) income		1,385
Interest income		0
Interest expense		0
Other income		0
(Loss) income from continuing operations before income taxes		1,385
Provision for income taxes, net		2,151
(Loss) income from continuing operations, net of tax		(766)
Income from divested operations		0
Net (loss) income		(766)
Discontinued Operations [Member]
Products		(22,796)
Services		0
Total net revenues		(22,796)
Products		(15,235)
Services		0
Amortization of intangible assets		0
Total cost of revenues		(15,235)
Gross profit		(7,561)
Research and development		(777)
Marketing and selling		(1,156)
General and administrative		(569)
Amortization of Intangible Assets		0
Restructuring Charges		0
Total operating expenses		(2,502)
Operating (loss) income		(5,059)
Interest income		0
Interest expense		0
Other income		0
(Loss) income from continuing operations before income taxes		(5,059)
Provision for income taxes, net		0
(Loss) income from continuing operations, net of tax		(5,059)
Income from divested operations		5,059
Net (loss) income		0
Scenario, Actual [Member]
Products		127,706
Services		31,445
Total net revenues		159,151
Products		45,482
Services		14,411
Amortization of intangible assets		650
Total cost of revenues		60,543
Gross profit		98,608
Research and development		26,460
Marketing and selling		41,873
General and administrative		14,348
Amortization of Intangible Assets		1,611
Restructuring Charges		444
Total operating expenses		84,736
Operating (loss) income		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
(Loss) income from continuing operations, net of tax		11,006
Income from divested operations		5,059
Net (loss) income		$ 16,065
Income (Loss) from Continuing Operations, Per Basic Share		$ 0.29
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share		$ 0.13
Earnings Per Share, Basic		$ 0.42
(Loss) income per share from continuing operations, net of tax – diluted		$ 0.28
Income per share from discontinued operations – diluted		$ 0.13
Net (loss) income per common share – diluted		$ 0.41
Weighted-average common shares outstanding – basic		38,662
Weighted-average common shares outstanding – diluted		38,721