Business Combinations (Acquired Intangible Assets and Estimated Useful Lives) (Details) - USD ($) $ in Thousands	Apr. 24, 2015	Nov. 17, 2014	Oct. 20, 2014
Shiny
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			$ 2,300
Shiny | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			$ 1,360
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			3 years
Shiny | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			$ 450
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			2 years 6 months
Shiny | Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			$ 490
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			3 years
iSocket
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		$ 12,193
iSocket | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		$ 9,310
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		5 years
iSocket | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		$ 2,880
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		2 years 6 months
iSocket | Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		$ 3
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		6 months
Chango
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 52,420
Chango | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	22,000
Chango | In-process research and development
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 580
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Chango | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 22,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Chango | Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 3,090
Chango | Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 4,500
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Chango | Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 250
Minimum | Chango | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Maximum | Chango | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Maximum | Chango | Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year
Maximum | Chango | Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year