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