Goodwill And Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 772,916		$ 772,916		$ 635,675
Amortization expense	15,900	$ 10,700	50,500	$ 32,200
Estimated future amortization expense in year 2015	91,400		91,400
Estimated future amortization expense in year 2016	58,800		58,800
Estimated future amortization expense in year 2017	57,500		57,500
Estimated future amortization expense in year 2018	39,100		39,100
Estimated future amortization expense in year 2019	40,500		40,500
Estimated future amortization expense thereafter	96,500		$ 96,500
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	496,906		$ 496,906		390,063
Digital Media Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 276,010		$ 276,010		$ 245,612