Goodwill And Other Intangible Assets (Schedule Of Change In Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Goodwill [Roll Forward]
Balance at January 1, 2014	$ 1,768,949
Additions	14,569	[1]
Other	(428)
Balance at March 31, 2014	1,783,090
Enterprise and Service Provider [Member]
Goodwill [Roll Forward]
Balance at January 1, 2014	1,402,156
Additions	14,569
Other	0
Balance at March 31, 2014	1,416,725
SaaS [Member]
Goodwill [Roll Forward]
Balance at January 1, 2014	366,793
Additions	0
Other	(428)	[2]
Balance at March 31, 2014	$ 366,365

[1] Amount relates to Framehawk acquisition. See Note 4 for more information regarding the Company’s acquisitions.

[2] Amount primarily relates to foreign currency translation.