Business Combinations (Schedule of Finite-Lived Intangible Assets Acquired) (Details) (Enterasys Networks, Inc., USD $) In Thousands, unless otherwise specified	0 Months Ended
	Dec. 31, 2013	Oct. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		3 years
Amount		$ 108,900
Developed Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		3 years
Amount		45,000
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		3 years
Amount		37,000
Maintenance Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		5 years
Amount		17,000
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		3 years
Amount		2,500
Order Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	1 year 6 months	1 year
Amount		$ 7,400