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GOODWILL AND INTANGIBLE ASSETS (Intangible Assets Amortization Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization of intangibles |  | $ 6,083 | $ 6,663 | $ 7,039
Finite-Lived Intangible Assets, Accumulated Amortization |  | 34,492 | 31,409 |
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract] |  |  |  |
2018 |  | 5,152 |  |
2019 |  | 4,753 |  |
2020 |  | 3,528 |  |
2021 |  | 2,662 |  |
2022 |  | 1,584 |  |
Thereafter |  | 1,789 |  |
Total Finite Lived Intangible Assets, Net | [1] | 19,468 |  |
Leases, Acquired-in-Place [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 660 | 660 |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 660 | 480 |
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract] |  |  |  |
Total Finite Lived Intangible Assets, Net |  | 0 | 180 |
Developed technology |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 33,270 | 33,270 |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 19,211 | 15,455 |
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract] |  |  |  |
Total Finite Lived Intangible Assets, Net |  | 14,059 | 17,815 |
Customer relationships [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 20,030 | 20,030 |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 14,621 | 12,474 |
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract] |  |  |  |
Total Finite Lived Intangible Assets, Net |  | $ 5,409 | $ 7,556 |
Minimum [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Useful life (in years) |  | 2 years |  |
Maximum [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Useful life (in years) |  | 12 years |  |
Cambridge Semiconductor Limited [Member] | Customer relationships [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Useful life (in years) |  | 5 years |  |
Cambridge Semiconductor Limited [Member] | Minimum [Member] | Developed technology |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Useful life (in years) |  | 3 years |  |
Cambridge Semiconductor Limited [Member] | Maximum [Member] | Developed technology |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Useful life (in years) |  | 7 years |  |
[1] | The total above excludes $4.7 million of in-process R&D which will be amortized upon completion of development over the estimated useful life of the technology.

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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