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INTANGIBLE ASSETS, NET (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items] |  |
Cost | $ 170,122 | $ 169,263
Accumulated Amortization | (150,281) | (141,134)
Net | $ 19,841 | $ 28,129
Technologies [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 4 years | 4 years
Cost | $ 110,310 | $ 109,543
Accumulated Amortization | (103,897) | (98,354)
Net | $ 6,413 | $ 11,189
Technologies One [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 5 years | 5 years
Technologies Two [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 9 years | 9 years
Facilities lease [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 19 years | 19 years
Cost | $ 33,500 | $ 33,500
Accumulated Amortization | (21,665) | (20,377)
Net | $ 11,835 | $ 13,123
Patents and other core technology right [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 9 years | 9 years
Cost | $ 15,100 | $ 15,100
Accumulated Amortization | (15,100) | (13,903)
Net |  | $ 1,197
Trade name [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 9 years | 9 years
Cost | $ 7,612 | $ 7,520
Accumulated Amortization | (7,009) | (6,064)
Net | $ 603 | $ 1,456
Customer relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 15 years | 15 years
Cost | $ 2,600 | $ 2,600
Accumulated Amortization | (1,610) | (1,436)
Net | 990 | 1,164
Others [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Cost | 1,000 | 1,000
Accumulated Amortization | (1,000) | (1,000)
Net |  |

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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