GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Amortization of Finite-Lived Intangible Assets	$ 1,400,000	$ 2,600,000
Amortizing Identifiable Intangible Assets [Abstract]
Gross	113,862,000		114,171,000
Accumulated Amortization	(106,097,000)		(104,954,000)
Net	7,765,000		9,217,000
Future expected amortization expense, identifiable intangible assets
2011	3,000,000
2012	2,000,000
2013	2,000,000
2014	1,000,000
Completed Technologies and Patents [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	52,527,000		52,720,000
Accumulated Amortization	(51,650,000)		(51,171,000)
Net	877,000		1,549,000
Customer Relationships [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	49,441,000		49,543,000
Accumulated Amortization	(43,404,000)		(42,828,000)
Net	6,037,000		6,715,000
Trade Names [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	5,960,000		5,970,000
Accumulated Amortization	(5,960,000)		(5,970,000)
Net	0		0
Software and Software Development Costs [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	5,934,000		5,938,000
Accumulated Amortization	(5,083,000)		(4,985,000)
Net	$ 851,000		$ 953,000