INTANGIBLE ASSETS AND GOODWILL (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of Finite-Lived Intangible Assets	$ 10,300	$ 6,400	$ 1,800
Amortizing Identifiable Intangible Assets [Abstract]
Gross	118,848	118,945
Accumulated Amortization	(95,916)	(85,726)
Net	22,932	33,219
Goodwill and intangible assets impairments [Abstract]
Goodwill	32,643	32,643
Future expected amortization expense, identifiable intangible assets
2017	9,300
2018	9,300
2019	4,300
Completed technologies and patents [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	57,994	58,032
Accumulated Amortization	(38,657)	(30,902)
Net	19,337	27,130
Customer relationships [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	54,597	54,656
Accumulated Amortization	(51,002)	(48,767)
Net	3,595	5,889
Trade names [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	1,346	1,346
Accumulated Amortization	(1,346)	(1,146)
Net	0	200
Capitalized software costs [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	4,911	4,911
Accumulated Amortization	(4,911)	(4,911)
Net	$ 0	$ 0