INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of Finite-Lived Intangible Assets	$ 600	$ 400	$ 1,000	$ 1,000
Amortizing Identifiable Intangible Assets [Abstract]
Gross	148,600		148,600		$ 112,145
Accumulated Amortization	(109,899)		(109,899)		(109,700)
Net	38,701		38,701		2,445
Goodwill	33,905		33,905		0
Future expected amortization expense, identifiable intangible assets
2015	5,500		5,500
2016	10,300		10,300
2017	9,300		9,300
2018	9,300		9,300
2019	4,400		4,400
Completed Technologies and Patents [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	82,679		82,679		51,950
Accumulated Amortization	(51,642)		(51,642)		(51,950)
Net	31,037		31,037		0
Customer Relationships [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	54,776		54,776		49,216
Accumulated Amortization	(47,312)		(47,312)		(46,771)
Net	7,464		7,464		2,445
Trade Names [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	6,112		6,112		5,936
Accumulated Amortization	(5,912)		(5,912)		(5,936)
Net	200		200		0
Capitalized Software Costs [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	5,033		5,033		5,043
Accumulated Amortization	(5,033)		(5,033)		(5,043)
Net	$ 0		$ 0		$ 0