FINANCIAL INFORMATION Revised Consolidated Statements of Operations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net revenues:
Products	$ 90,878	$ 131,655	$ 333,841	$ 397,889
Services	36,297	33,043	102,905	94,343
Total net revenues	127,175	164,698	436,746	492,232
Cost of revenues:
Products	43,784	60,063	171,633	187,952
Services	15,107	15,586	42,149	44,346
Amortization of intangible assets	634	684	1,928	2,036
Total cost of revenues	60,053	76,333	218,871	234,334
Gross profit	67,122	88,365	217,875	257,898
Operating expenses:
Research and development	23,099	28,960	77,474	89,386
Marketing and selling	36,629	45,395	126,017	136,312
General and administrative	10,542	13,518	39,338	42,737
Amortization of intangible assets	782	2,159	3,499	6,465
Restructuring costs, net	12,674	2,707	28,683	1,392
Loss on sale of assets			9,745	597
Total operating expenses	83,520	92,739	284,504	276,889
Operating loss	(16,398)	(4,374)	(66,629)	(18,991)
Interest income	49	10	164	78
Interest expense	(404)	(556)	(1,124)	(1,572)
Other income (expense), net	37	43	69	46
Loss before income taxes	(16,716)	(4,877)	(67,520)	(20,439)
Provision for income taxes, net	672	2,672	2,097	3,039
Net loss	(17,388)	(7,549)	(69,617)	(23,478)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.45)	$ (0.20)	$ (1.80)	$ (0.61)
As Reported [Member]
Net revenues:
Products		131,875		398,400
Services		33,090		94,232
Total net revenues		164,965		492,632
Cost of revenues:
Products		60,048		187,663
Services		16,497		46,196
Amortization of intangible assets		685		2,036
Total cost of revenues		77,230		235,895
Gross profit		87,735		256,737
Operating expenses:
Research and development		28,960		89,386
Marketing and selling		45,411		136,273
General and administrative		13,240		43,458
Amortization of intangible assets		2,159		6,465
Restructuring costs, net		2,707		328
Loss on sale of assets		0		(597)
Total operating expenses		92,477		276,507
Operating loss		(4,742)		(19,770)
Interest income		10		78
Interest expense		556		1,695
Other income (expense), net		43		46
Loss before income taxes		(5,245)		(21,341)
Provision for income taxes, net		2,774		3,657
Net loss		(8,019)		(24,998)
Net loss per common share - basic		$ (0.21)		$ (0.65)
Weighted-average common shares outstanding - basic		38,511		38,386
As Revised [Member]
Net revenues:
Products		131,655		397,889
Services		33,043		94,343
Total net revenues		164,698		492,232
Cost of revenues:
Products		60,063		187,952
Services		15,586		44,346
Amortization of intangible assets		684		2,036
Total cost of revenues		76,333		234,334
Gross profit		88,365		257,898
Operating expenses:
Research and development		28,960		89,386
Marketing and selling		45,395		136,312
General and administrative		13,518		42,737
Amortization of intangible assets		2,159		6,465
Restructuring costs, net		2,707		1,392
Loss on sale of assets		0		(597)
Total operating expenses		92,739		276,889
Operating loss		(4,374)		(18,991)
Interest income				78
Interest expense				1,572
Other income (expense), net				46
Loss before income taxes		(4,877)		(20,439)
Provision for income taxes, net		2,672		3,039
Net loss		$ (7,549)		$ (23,478)
Net loss per common share - basic		$ (0.20)		$ (0.61)
Weighted-average common shares outstanding - basic		38,511		38,386