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Acquisition (Identified Intangible Assets) (Details) - USD ($) $ in Thousands |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 05, 2016 | Aug. 04, 2016 | Jan. 25, 2016 | Dec. 31, 2017
Inphi Memory Interconnect Business [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identified intangible assets |  | $ 50,222 |  |
Inphi Memory Interconnect Business [Member] | Existing technology |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identified intangible assets |  | $ 44,900 |  |
Estimated Weighted Average Useful Life |  | 5 years |  |
Inphi Memory Interconnect Business [Member] | In Process Research and Development [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
ResearchAndDevelopmentEstimatedTimeToCompletion |  |  |  | 3 years
Indefinite-lived Intangible Assets Acquired |  | $ 1,600 |  |
Inphi Memory Interconnect Business [Member] | Customer contracts and contractual relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identified intangible assets |  | $ 3,722 |  |
Estimated Weighted Average Useful Life |  | 6 years |  |
Smart Card Software Limited |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identified intangible assets |  |  | $ 59,700 |
Smart Card Software Limited | Favorable Contracts [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identified intangible assets |  |  | $ 8,300 |
Estimated Weighted Average Useful Life |  |  | 5 years |
Smart Card Software Limited | Existing technology |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identified intangible assets |  |  | $ 24,600 |
Estimated Weighted Average Useful Life |  |  | 6 years |
Smart Card Software Limited | Customer contracts and contractual relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identified intangible assets |  |  | $ 35,100 |
Estimated Weighted Average Useful Life |  |  | 6 years |
Snowbush [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identified intangible assets | $ 25,189 |  |  |
Snowbush [Member] | Existing technology |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identified intangible assets | $ 2,600 |  |  |
Estimated Weighted Average Useful Life | 5 years |  |  |
Snowbush [Member] | In Process Research and Development [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired | $ 21,800 |  |  |
Snowbush [Member] | Customer contracts and contractual relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identified intangible assets | $ 789 |  |  |
Estimated Weighted Average Useful Life | 2 years |  |  |
Minimum | Inphi Memory Interconnect Business [Member] | In Process Research and Development [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated Weighted Average Useful Life |  |  |  | 5 years
Minimum | Snowbush [Member] | In Process Research and Development [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated Weighted Average Useful Life |  |  |  | 4 years
Maximum | Inphi Memory Interconnect Business [Member] | In Process Research and Development [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated Weighted Average Useful Life |  |  |  | 7 years
Maximum | Snowbush [Member] | In Process Research and Development [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated Weighted Average Useful Life |  |  |  | 6 years

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