Goodwill And Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 533,403,000		$ 533,403,000		$ 457,422,000
Amortization expense	10,700,000	7,500,000	32,200,000	21,600,000
Estimated future amortization expense in year 2014	44,300,000		44,300,000
Estimated future amortization expense in year 2015	45,600,000		45,600,000
Estimated future amortization expense in year 2016	40,000,000		40,000,000
Estimated future amortization expense in year 2017	33,100,000		33,100,000
Estimated future amortization expense in year 2018	23,800,000		23,800,000
Estimated future amortization expense thereafter	76,100,000		76,100,000
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets minimum useful life (years)			1 year
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets minimum useful life (years)			20 years
Business Cloud Services Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	385,300,000		385,300,000
Digital Media Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 148,100,000		$ 148,100,000