Goodwill And Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 429,293,000		$ 407,825,000
Amortization expense	6,800,000	3,700,000
Estimated future amortization expense in year 2012	33,300,000
Estimated future amortization expense in year 2013	23,800,000
Estimated future amortization expense in year 2015	21,200,000
Estimated future amortization expense in year 2016	19,700,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	16,200,000
Estimated future amortization expense thereafter	55,200,000
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	303,400,000
Digital Media Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 125,900,000