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.