Goodwill And Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 674,084		$ 674,084		$ 635,675
Amortization expense	17,600	$ 11,500	34,600	$ 21,500
Estimated future amortization expense in year 2015	57,800		57,800
Estimated future amortization expense in year 2016	47,700		47,700
Estimated future amortization expense in year 2017	43,100		43,100
Estimated future amortization expense in year 2018	32,700		32,700
Estimated future amortization expense in year 2019	30,400		30,400
Estimated future amortization expense thereafter	106,200		$ 106,200
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	432,756		$ 432,756		390,063
Digital Media Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 241,328		$ 241,328		$ 245,612