INTANGIBLE ASSETS AND GOODWILL (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jun. 23, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization of Finite-Lived Intangible Assets	$ 6,400	$ 1,800	$ 4,900
Amortizing Identifiable Intangible Assets [Abstract]
Gross	118,945	112,145
Accumulated Amortization	(85,726)	(109,700)
Net	33,219	2,445
Goodwill and intangible assets impairments [Abstract]
Goodwill	32,643	0		$ 32,643
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	10,300
Future expected amortization expense, identifiable intangible assets
2017	9,300
2018	9,300
2019	4,300
Completed technologies and patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross value of intangible assets written-off	24,300
Amortizing Identifiable Intangible Assets [Abstract]
Gross	58,032	51,950
Accumulated Amortization	(30,902)	(51,950)
Net	27,130	0
Customer relationships [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	54,656	49,216
Accumulated Amortization	(48,767)	(46,771)
Net	5,889	2,445
Trade names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross value of intangible assets written-off	4,800
Amortizing Identifiable Intangible Assets [Abstract]
Gross	1,346	5,936
Accumulated Amortization	(1,146)	(5,936)
Net	200	0
Capitalized software costs [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	4,911	5,043
Accumulated Amortization	(4,911)	(5,043)
Net	$ 0	$ 0