GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details) (USD $)	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011	Dec. 31, 2011	Mar. 31, 2012 Completed Technologies and Patents [Member]		Dec. 31, 2011 Completed Technologies and Patents [Member]	Mar. 31, 2012 Customer Relationships [Member]		Dec. 31, 2011 Customer Relationships [Member]	Mar. 31, 2012 Trade Names [Member]		Dec. 31, 2011 Trade Names [Member]	Mar. 31, 2012 License Agreements [Member]		Dec. 31, 2011 License Agreements [Member]	Mar. 31, 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]
Carrying amount of Goodwill [Abstract]
Goodwill acquired	$ 418,784,000	[1]		$ 418,492,000
Accumulated impairment losses	(171,900,000)			(171,900,000)
Goodwill	246,884,000	[1]		246,592,000
Finite-Lived Intangible Assets [Line Items]
Forecasted Capitalized Computer Software Amortization Year Two	1,000,000
Reporting unit fair value																				506,000,000	530,000,000
Capitalized Computer Software, Gross	6,906,000			6,876,000
Capitalized Computer Software, Accumulated Amortization	(5,047,000)			(4,730,000)
Capitalized Computer Software, Net	1,859,000			2,146,000
Changes in carrying amount of Goodwill [Roll Forward]
Foreign exchange and other adjustments	300,000
Goodwill, Translation Adjustments	100,000
Amortizing Identifiable Intangible Assets [Abstract]
Gross	159,858,000			159,541,000	74,805,000		74,624,000	68,320,000		68,226,000	14,772,000		14,763,000	560,000		560,000	1,401,000		1,368,000
Accumulated Amortization	(143,471,000)			(141,017,000)	(71,290,000)		(70,536,000)	(55,819,000)		(54,396,000)	(14,707,000)		(14,577,000)	(560,000)		(560,000)	(1,095,000)		(948,000)
Net	16,387,000			18,524,000	3,515,000	[2]	4,088,000	12,501,000	[2]	13,830,000	65,000	[2]	186,000	0	[2]	0	306,000	[2]	420,000
Reporting unit carrying value																				417,000,000	414,900,000
Fair value exceeds carrying value step one test percentage																				21.00%	28.00%
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	$ 8.73
common stock closing price																				$ 8.53	$ 7.74
Fair value exceeds carrying value percentage																				26.00%	20.00%
market capitalization based on closing stock price																				329,300,000	298,300,000
Carrying value control premium																				27.00%	39.00%
Capitalized software development costs amortized to cost of product revenues	300,000		300,000
Forecasted Capitalized Computer Software Amortization Year One	1,000,000
Amortization expense [Abstract]
Amortization expense, identifiable intangible assets	2,300,000		2,800,000
Future expected amortization expense, identifiable intangible assets
2011	5,000,000
2012	5,000,000
2013	2,000,000
2014	2,000,000
2015	$ 2,000,000

[1] (a) The March 31, 2012 gross and net goodwill amounts include total foreign currency translation increases of approximately $0.3 million from the December 31, 2011 amounts.

[2] The March 31, 2012 net amounts include total foreign currency translation increases of approximately $0.1 million from the December 31, 2011 amounts