INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Amortizing Identifiable Intangible Assets [Abstract]
Gross	$ 119,420		$ 118,945
Accumulated Amortization	(88,926)		(85,726)
Net	30,494		33,219
Amortization of Finite-Lived Intangible Assets	2,700	$ 400
Future expected amortization expense, identifiable intangible assets
2016	7,600
2017	9,300
2018	9,300
2019	4,300
Carrying value of Goodwill [Abstract]
Goodwill	32,643		32,643
Completed Technologies and Patents [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	58,359		58,032
Accumulated Amortization	(33,172)		(30,902)
Net	25,187		27,130
Customer Relationships [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	54,804		54,656
Accumulated Amortization	(49,543)		(48,767)
Net	5,261		5,889
Trade Names [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	1,346		1,346
Accumulated Amortization	(1,300)		(1,146)
Net	46		200
Capitalized Software Costs [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	4,911		4,911
Accumulated Amortization	(4,911)		(4,911)
Net	$ 0		$ 0