FINANCIAL INFORMATION Revised Consolidated Balance Sheets (Details) (USD $)	Sep. 30, 2012		Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2012 Q1 2012 Revised Financial Statements [Member]	Dec. 31, 2011 Q1 2012 Revised Financial Statements [Member]	Dec. 31, 2010 Q1 2012 Revised Financial Statements [Member]	Dec. 31, 2009 Q1 2012 Revised Financial Statements [Member]	Dec. 31, 2011 As Reported [Member]	Dec. 31, 2011 As Revised [Member]
Accrued withholding taxes understatement						$ 3,800,000
Interest and penalties on withholding tax understatement						1,200,000	1,000,000
Interest on withholding tax understatement						800,000	600,000
Penalties on withholding tax understatement						400,000	400,000
Increase in accumulated deficit							(7,900,000)	(8,200,000)	(6,300,000)
Current assets:
Cash and cash equivalents	71,359,000		32,855,000	33,652,000	42,782,000					32,855,000	32,855,000
Accounts receivable	75,074,000		104,305,000							104,305,000	104,305,000
Inventories	80,435,000		111,397,000							111,833,000	111,397,000
Deferred tax assets, net	1,475,000		1,480,000							1,480,000	1,480,000
Prepaid expenses	7,616,000		7,652,000							7,652,000	7,652,000
Other current assets	16,303,000		14,405,000							14,509,000	14,405,000
Total current assets	252,262,000		272,094,000							272,634,000	272,094,000
Property and equipment, net	43,825,000		53,487,000							53,487,000	53,487,000
Intangible assets, net	9,637,000	[1]	18,524,000							18,524,000	18,524,000
Goodwill	238,553,000	[2]	246,592,000							246,398,000	246,592,000
Other assets	9,689,000		11,568,000							11,568,000	11,568,000
Total assets	553,966,000		602,265,000							602,611,000	602,265,000
Current liabilities:
Accounts payable	36,307,000		42,533,000							42,533,000	42,533,000
Accrued compensation and benefits	22,706,000		31,750,000							31,350,000	31,750,000
Accrued expenses and other current liabilities	41,897,000		35,108,000							34,174,000	35,108,000
Income taxes payable	8,972,000		8,950,000							3,898,000	8,950,000
Deferred revenues	58,180,000		45,768,000							45,768,000	45,768,000
Total current liabilities	168,062,000		164,109,000							157,723,000	164,109,000
Long-term liabilities	36,581,000		27,885,000							27,885,000	27,885,000
Total liabilities	204,643,000		191,994,000							185,608,000	191,994,000
Stockholders' equity:
Common stock	423,000		423,000							423,000	423,000
Additional paid-in capital	1,025,640,000		1,019,200,000							1,018,604,000	1,019,200,000
Accumulated deficit	(606,915,000)		(532,477,000)							(524,530,000)	(532,477,000)
Treasury stock at cost, net of reissuances	(76,686,000)		(82,301,000)							(82,301,000)	(82,301,000)
Accumulated other comprehensive income	6,861,000		5,426,000							4,807,000	5,426,000
Total stockholders' equity	349,323,000		410,271,000							417,003,000	410,271,000
Total liabilities and stockholders' equity	$ 553,966,000		$ 602,265,000							$ 602,611,000	$ 602,265,000

[1] In the nine months ended September 30, 2012 the company wrote off approximately $40.1 million of fully amortized intangible assets

[2] (a) The September 30, 2012 gross and net goodwill amounts include total foreign currency translation increases of approximately $0.1 million from the December 31, 2011 (Revised) amounts.