Intangible Assets, Net (Gross And Net Carrying Amounts For Each Major Class Of Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross amount	$ 5,504,095	$ 5,492,833
Accumulated amortization	(1,472,571)	(1,303,293)
Net book value	4,031,524	4,189,540
Current Contract Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	4,057,849	4,090,129
Accumulated amortization	(1,015,310)	(891,374)
Net book value	3,042,539	3,198,755
Network Location Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	1,446,246	1,402,704
Accumulated amortization	(457,261)	(411,919)
Net book value	$ 988,985	$ 990,785