INTANGIBLE ASSETS (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Amortization of Finite-Lived Intangible Assets	$ 900,000	$ 1,500,000	$ 3,500,000	$ 6,100,000
Amortizing Identifiable Intangible Assets [Abstract]
Gross	114,231,000		114,231,000		114,171,000
Accumulated Amortization	(108,557,000)		(108,557,000)		(104,954,000)
Net	5,674,000		5,674,000		9,217,000
Future expected amortization expense, identifiable intangible assets
2011	1,000,000		1,000,000
2012	2,000,000		2,000,000
2013	2,000,000		2,000,000
2014	1,000,000		1,000,000
Completed Technologies and Patents [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	52,724,000		52,724,000		52,720,000
Accumulated Amortization	(52,510,000)		(52,510,000)		(51,171,000)
Net	214,000		214,000		1,549,000
Customer Relationships [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	49,592,000		49,592,000		49,543,000
Accumulated Amortization	(44,856,000)		(44,856,000)		(42,828,000)
Net	4,736,000		4,736,000		6,715,000
Trade Names [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	5,974,000		5,974,000		5,970,000
Accumulated Amortization	(5,974,000)		(5,974,000)		(5,970,000)
Net	0		0		0
Software and Software Development Costs [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	5,941,000		5,941,000		5,938,000
Accumulated Amortization	(5,217,000)		(5,217,000)		(4,985,000)
Net	$ 724,000		$ 724,000		$ 953,000