Intangible Assets, Net (Gross And Net Carrying Amounts For Each Major Class Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross amount	$ 5,131,696	$ 4,363,758
Accumulated amortization	(1,220,941)	(976,560)
Net book value	3,910,755	3,387,198
Current Contract Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	3,800,298	3,154,616
Accumulated amortization	(830,888)	(649,861)
Net book value	2,969,410	2,504,755
Network Location Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	1,331,398	1,209,142
Accumulated amortization	(390,053)	(326,699)
Net book value	$ 941,345	$ 882,443