GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details) (USD $)	3 Months Ended				6 Months Ended	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011	Mar. 31, 2011	Jun. 30, 2011	Sep. 30, 2012		Jun. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Completed Technologies and Patents [Member]	Dec. 31, 2011 Completed Technologies and Patents [Member]	Sep. 30, 2012 Customer Relationships [Member]		Dec. 31, 2011 Customer Relationships [Member]	Sep. 30, 2012 Trade Names [Member]	Dec. 31, 2011 Trade Names [Member]	Sep. 30, 2012 License Agreements [Member]	Dec. 31, 2011 License Agreements [Member]	Sep. 30, 2012 Noncompete Covenants [Member]	Dec. 31, 2011 Noncompete Covenants [Member]	Dec. 31, 2011 Goodwill Impairment Test 2011 [Member]	Nov. 02, 2012 Goodwill Impairment Test 2012 [Member]	Sep. 30, 2012 Goodwill Impairment Test 2012 [Member]	Sep. 30, 2012 Assets Held for Sale, Net Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Forecasted Capitalized Computer Software Amortization Year Two						$ 400,000
Reporting unit fair value																					506,000,000		510,000,000
Capitalized Computer Software, Gross	5,934,000					5,934,000			6,876,000
Capitalized Computer Software, Accumulated Amortization	(4,873,000)					(4,873,000)			(4,730,000)
Capitalized Computer Software, Net	1,061,000					1,061,000			2,146,000
Changes in carrying amount of Goodwill [Roll Forward]
Foreign exchange and other adjustments	100,000
Amortizing Identifiable Intangible Assets [Abstract]
Gross	109,245,000					109,245,000			159,541,000	52,646,000	74,624,000	49,475,000		68,226,000	5,965,000	14,763,000	0	560,000	1,159,000	1,368,000
Accumulated Amortization	(99,608,000)					(99,608,000)			(141,017,000)	(50,459,000)	(70,536,000)	(42,122,000)		(54,396,000)	(5,965,000)	(14,577,000)	0	(560,000)	(1,062,000)	(948,000)
Net	9,637,000	[1]				9,637,000	[1]		18,524,000	2,187,000	4,088,000	7,353,000	[2]	13,830,000	0	186,000	0	0	97,000	420,000
Reporting unit carrying value																					417,000,000	349,300,000	349,300,000
Fair value exceeds carrying value step one test percentage																					21.00%		46.00%
Direct market capitalization approach weight																					67.00%		67.00%
Income approach weight																					11.00%		11.00%
Guideline transaction market approach weight																					11.00%		11.00%
Guideline public company market approach weight																					11.00%		11.00%
Direct market capitalization approach control premium																					45.00%		45.00%
Market capitalization stock trading day period																					20		20
Direct market capitalization average stock price																					$ 8.04		$ 9.60
common stock closing price																					$ 8.53	$ 6.30	$ 9.46
Fair value exceeds carrying value percentage																					26.00%	43.00%	45.00%
market capitalization based on closing stock price																					329,300,000	245,200,000	367,800,000
Carrying value control premium																					27.00%
Capitalized software development costs amortized to cost of product revenues	100,000			300,000	900,000	700,000
net capitalized software included in loss on sales of assets						400,000
Forecasted Capitalized Computer Software Amortization Year One						100,000
Forecasted Capitalized Computer Software Amortization Year Three						600,000
Goodwill acquired	418,497,000	[3]				418,497,000	[3]		418,492,000
Accumulated impairment losses	(171,900,000)					(171,900,000)			(171,900,000)
Goodwill Allocated to Assets Held for Sale	(8,044,000)					(8,044,000)			0
Goodwill	238,553,000	[3]				238,553,000	[3]		246,592,000
Reclassifications to assets held-for-sale								12,940,000																3,500,000
Fully amortized intangible assets, write off	40,100,000
Amortization expense [Abstract]
Amortization expense, identifiable intangible assets	1,400,000		2,800,000	8,500,000		5,400,000
Future expected amortization expense, identifiable intangible assets
2011						2,000,000
2012						4,000,000
2013						2,000,000
2014						1,000,000
2015						$ 1,000,000

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

[2] In connection with the divestitures referenced in Note 7, during the nine-month period ended September 30, 2012, approximately $3.5 million of net customer relationships, related to the consumer audio product line, was allocated to the divestiture and included in the loss on sales of assets in our consolidated statements of operations.

[3] (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.