GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2012		Mar. 31, 2011	Jun. 30, 2012		Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2012 Completed Technologies and Patents [Member]		Dec. 31, 2011 Completed Technologies and Patents [Member]	Jun. 30, 2012 Customer Relationships [Member]		Dec. 31, 2011 Customer Relationships [Member]	Jun. 30, 2012 Trade Names [Member]		Dec. 31, 2011 Trade Names [Member]	Jun. 30, 2012 License Agreements [Member]		Dec. 31, 2011 License Agreements [Member]	Jun. 30, 2012 Noncompete Covenants [Member]		Dec. 31, 2011 Noncompete Covenants [Member]	Dec. 31, 2011 Goodwill Impairment Test 2011 [Member]	Sep. 30, 2011 Goodwill Impairment Test 2011 [Member]	Jun. 30, 2012 Goodwill Impairment Test 2012 [Member]	Jun. 30, 2012 Assets Held for Sale, Net Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Forecasted Capitalized Computer Software Amortization Year Two				$ 500,000
Reporting unit fair value																							506,000,000	530,000,000	443,000,000
Capitalized Computer Software, Gross	5,913,000			5,913,000			6,876,000
Capitalized Computer Software, Accumulated Amortization	(4,743,000)			(4,743,000)			(4,730,000)
Capitalized Computer Software, Net	1,170,000			1,170,000			2,146,000
Changes in carrying amount of Goodwill [Roll Forward]
Foreign exchange and other adjustments	200,000
Goodwill, Translation Adjustments	100,000
Amortizing Identifiable Intangible Assets [Abstract]
Gross	149,062,000			149,062,000			159,541,000	74,526,000		74,624,000	58,080,000		68,226,000	14,756,000		14,763,000	560,000		560,000	1,140,000		1,368,000
Accumulated Amortization	(138,066,000)			(138,066,000)			(141,017,000)	(71,749,000)		(70,536,000)	(50,062,000)		(54,396,000)	(14,745,000)		(14,577,000)	(560,000)		(560,000)	(950,000)		(948,000)
Net	10,996,000			10,996,000			18,524,000	2,777,000	[1]	4,088,000	8,018,000	[1],[2]	13,830,000	11,000	[1]	186,000	0	[1]	0	190,000	[1]	420,000
Reporting unit carrying value																							417,000,000	414,900,000	362,000,000
Fair value exceeds carrying value step one test percentage																							21.00%	28.00%	22.00%
Direct market capitalization approach weight																							67.00%	67.00%	67.00%
Income approach weight																							11.00%	11.00%	11.00%
Guideline transaction market approach weight																							11.00%	11.00%	11.00%
Guideline public company market approach weight																							11.00%	11.00%	11.00%
Direct market capitalization approach control premium																							45.00%	45.00%	45.00%
Market capitalization stock trading day period																							20	20	20
Direct market capitalization average stock price																							$ 8.04	$ 8.73	$ 7.06
common stock closing price																							$ 8.53	$ 7.74	$ 7.43
Fair value exceeds carrying value percentage																							26.00%	20.00%	26.00%
market capitalization based on closing stock price																							329,300,000	298,300,000	288,400,000
Carrying value control premium																							27.00%	39.00%	26.00%
Capitalized software development costs amortized to cost of product revenues	300,000		300,000	600,000		600,000
Forecasted Capitalized Computer Software Amortization Year One				300,000
Forecasted Capitalized Computer Software Amortization Year Three				400,000
Goodwill acquired	418,282,000	[3]		418,282,000	[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	238,338,000	[3]		238,338,000	[3]		246,592,000
Reclassifications to assets held-for-sale	12,940,000			12,940,000			0																			3,500,000
Amortization expense [Abstract]
Amortization expense, identifiable intangible assets	1,700,000		5,700,000	4,000,000
Future expected amortization expense, identifiable intangible assets
2011				3,000,000
2012				4,000,000
2013				2,000,000
2014				1,000,000
2015				$ 1,000,000

[1] The June 30, 2012 net amounts include total foreign currency translation decreases of approximately $0.1 million from the December 31, 2011 amounts

[2] In connection with the divestitures referenced in Note 7, during the three-month period ended June 30, 2012, approximately $3.5 million of net customer relationships, related to the consumer audio product line, was reclassified to assets held-for-sale in our consolidated balance sheet.

[3] (a) The June 30, 2012 gross and net goodwill amounts include total foreign currency translation decreases of approximately $0.2 million from the December 31, 2011 amounts.