INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization of Finite-Lived Intangible Assets	$ 2,500	$ 2,700	$ 8,000	$ 3,700
Amortizing Identifiable Intangible Assets [Abstract]
Gross	119,267		119,267		$ 118,945
Accumulated Amortization	(94,022)		(94,022)		(85,726)
Net	25,245		25,245		33,219
Future expected amortization expense, identifiable intangible assets
2016	2,300		2,300
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	58,257		58,257		58,032
Accumulated Amortization	(36,969)		(36,969)		(30,902)
Net	21,288		21,288		27,130
Customer Relationships [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	54,753		54,753		54,656
Accumulated Amortization	(50,796)		(50,796)		(48,767)
Net	3,957		3,957		5,889
Trade Names [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	1,346		1,346		1,346
Accumulated Amortization	(1,346)		(1,346)		(1,146)
Net	0		0		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