Acquisition (Narrative) (Details) - USD ($) $ in Millions				3 Months Ended
	Aug. 05, 2016	Aug. 04, 2016	Jan. 25, 2016	Mar. 31, 2016	Dec. 31, 2016
Business Acquisition [Line Items]
Business acquisition transaction costs					$ 3.4
Smart Card Software Limited
Business Acquisition [Line Items]
Business Combination, Consideration Transferred			$ 92.6	$ 104.7
Escrow deposit for indemnification obligations and other contractual provisions			$ 17.1
Escrow deposit release term			18 months
Business acquisition transaction costs					2.0
Smart Card Software Limited | Scenario, Previously Reported [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred				12.1
Cash consideration				11.6
Working capital consideration				4.0
Liabilities assumed				$ 3.5
Inphi Memory Interconnect Business [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		$ 90.0
Escrow deposit for indemnification obligations and other contractual provisions		$ 11.3
Escrow deposit release term		12 months
Business acquisition transaction costs					0.7
Snowbush [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 32.0
Business acquisition transaction costs					$ 0.7