Balance Sheet Accounts (Schedule of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Oct. 31, 2013 Enterasys Networks, Inc.	Mar. 31, 2014 Enterasys Networks, Inc.	Dec. 31, 2013 Enterasys Networks, Inc.
Goodwill [Roll Forward]
Goodwill, Beginning of Period	$ 57,922	$ 0	$ 0		$ 64,537	$ 57,922
Addition due to acquisition of Enterasys (Note 4)		57,922		64,500
Purchase price allocation adjustments	6,615
Goodwill, End of Period	$ 64,537	$ 57,922	$ 0		$ 64,537	$ 57,922