Goodwill And Other Intangible Assets (Schedule Of Change In Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Goodwill [Roll Forward]
Balance at January 1, 2014	$ 1,768,949
Additions	21,684	[1]
Other	(598)
Balance at June 30, 2014	1,790,035
Enterprise and Service Provider [Member]
Goodwill [Roll Forward]
Balance at January 1, 2014	1,402,156
Additions	21,684
Other	1,086	[2]
Balance at June 30, 2014	1,424,926
SaaS [Member]
Goodwill [Roll Forward]
Balance at January 1, 2014	366,793
Additions	0
Other	(1,684)	[3]
Balance at June 30, 2014	$ 365,109

[1] Amounts relate to 2014 acquisitions. See Note 4 for more information regarding the Company’s acquisitions.

[2] Amount relates to adjustments to the preliminary purchase price allocation associated with 2013 acquisitions.

[3] Amount primarily relates to foreign currency translation.