Goodwill And Intangible Assets (Changes In Carrying Amounts Of Goodwill And Other Intangible Assets) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Goodwill [Line Items]
Balance as of January 1, 2015	$ 635,675
Goodwill, Acquired During Period	136,768
Goodwill, Purchase Accounting Adjustments	5,546
Foreign Exchange Translation	(5,073)
Balance as of September 30, 2015	772,916
Business Cloud Services Segment [Member]
Goodwill [Line Items]
Balance as of January 1, 2015	390,063
Goodwill, Acquired During Period	102,068
Foreign Exchange Translation	(5,062)
Balance as of September 30, 2015	496,906
Digital Media Segment [Member]
Goodwill [Line Items]
Balance as of January 1, 2015	245,612
Goodwill, Acquired During Period	34,700
Goodwill, Purchase Accounting Adjustments	(4,291)
Foreign Exchange Translation	(11)
Balance as of September 30, 2015	$ 276,010