Restructuring (Restructuring Charges by Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 3,124	[1]	$ 0	[1]	$ 17,285	[1]	$ 0	[1]
2014 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	3,124				17,285
2014 Restructuring Program [Member] | Enterprise and Service Provider Division [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	3,122				11,093
2014 Restructuring Program [Member] | SaaS Division [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 2				$ 6,192

[1] Represents expenses presented to management on a consolidated basis only and not allocated to the operating segments.