INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization of Finite-Lived Intangible Assets	$ 2,700	$ 600	$ 5,500	$ 1,000
Amortizing Identifiable Intangible Assets [Abstract]
Gross	119,242		119,242		$ 118,945
Accumulated Amortization	(91,480)		(91,480)		(85,726)
Net	27,762		27,762		33,219
Future expected amortization expense, identifiable intangible assets
2016	4,800		4,800
2017	9,300		9,300
2018	9,300		9,300
2019	4,400		4,400
Carrying value of Goodwill [Abstract]
Goodwill	32,643		32,643		32,643
Completed Technologies and Patents [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	58,249		58,249		58,032
Accumulated Amortization	(35,011)		(35,011)		(30,902)
Net	23,238		23,238		27,130
Customer Relationships [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	54,736		54,736		54,656
Accumulated Amortization	(50,411)		(50,411)		(48,767)
Net	4,325		4,325		5,889
Trade Names [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	1,346		1,346		1,346
Accumulated Amortization	(1,147)		(1,147)		(1,146)
Net	199		199		200
Capitalized Software Costs [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	4,911		4,911		4,911
Accumulated Amortization	(4,911)		(4,911)		(4,911)
Net	$ 0		$ 0		$ 0